syzbot


INFO: task hung in SyS_mq_unlink

Status: auto-closed as invalid on 2019/10/25 08:45
Reported-by: syzbot+bb90a5718be685d3d402@syzkaller.appspotmail.com
First crash: 1145d, last: 1133d

Sample crash report:
INFO: task syz-executor.5:5949 blocked for more than 140 seconds.
      Not tainted 4.14.120 #14
net_ratelimit: 16 callbacks suppressed
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kobject: 'loop2' (ffff8880a49fe0e0): kobject_uevent_env
kobject: 'loop2' (ffff8880a49fe0e0): fill_kobj_path: path = '/devices/virtual/block/loop2'
syz-executor.5  D29248  5949   5871 0x00000000
Call Trace:
 context_switch kernel/sched/core.c:2807 [inline]
 __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
kobject: 'loop2' (ffff8880a49fe0e0): kobject_uevent_env
kobject: 'loop2' (ffff8880a49fe0e0): fill_kobj_path: path = '/devices/virtual/block/loop2'
 schedule+0x92/0x1c0 kernel/sched/core.c:3427
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:572 [inline]
 rwsem_down_write_failed+0x5cd/0xbe0 kernel/locking/rwsem-xadd.c:601
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
 __down_write arch/x86/include/asm/rwsem.h:126 [inline]
 down_write_nested+0x57/0x90 kernel/locking/rwsem.c:174
 inode_lock_nested include/linux/fs.h:750 [inline]
 SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
kobject: 'loop2' (ffff8880a49fe0e0): kobject_uevent_env
kobject: 'loop2' (ffff8880a49fe0e0): fill_kobj_path: path = '/devices/virtual/block/loop2'
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x2000000d
RSP: 002b:00007f106816abd8 EFLAGS: 00000292 ORIG_RAX: 00000000000000f1
RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 000000002000000d
RDX: 5d49491cee4c8c39 RSI: 0000000000000021 RDI: 0000000020800000
RBP: 0000000000000066 R08: 0000000000000005 R09: 0000000000000006
R10: 0000000000000007 R11: 0000000000000292 R12: 000000000000000b
R13: 000000000000000c R14: 000000000000000d R15: 00000000ffffffff
kobject: 'loop2' (ffff8880a49fe0e0): kobject_uevent_env
kobject: 'loop2' (ffff8880a49fe0e0): fill_kobj_path: path = '/devices/virtual/block/loop2'

Showing all locks held in the system:
1 lock held by khungtaskd/1009:
 #0:  (tasklist_lock){.+.+}, at: [<ffffffff81483048>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4541
2 locks held by kworker/u4:4/2246:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffff813cd3ae>] work_static include/linux/workqueue.h:199 [inline]
 #0:  ("events_unbound"){+.+.}, at: [<ffffffff813cd3ae>] set_work_data kernel/workqueue.c:619 [inline]
 #0:  ("events_unbound"){+.+.}, at: [<ffffffff813cd3ae>] set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline]
 #0:  ("events_unbound"){+.+.}, at: [<ffffffff813cd3ae>] process_one_work+0x76e/0x1600 kernel/workqueue.c:2085
 #1:  ((reaper_work).work){+.+.}, at: [<ffffffff813cd3eb>] process_one_work+0x7ab/0x1600 kernel/workqueue.c:2089
2 locks held by getty/6970:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff861a1043>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83103c36>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6971:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff861a1043>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83103c36>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6972:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff861a1043>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83103c36>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6973:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff861a1043>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83103c36>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6974:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff861a1043>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83103c36>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6975:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff861a1043>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83103c36>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6976:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff861a1043>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff83103c36>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by kworker/u4:9/24240:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffff813cd3ae>] work_static include/linux/workqueue.h:199 [inline]
 #0:  ("events_unbound"){+.+.}, at: [<ffffffff813cd3ae>] set_work_data kernel/workqueue.c:619 [inline]
 #0:  ("events_unbound"){+.+.}, at: [<ffffffff813cd3ae>] set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline]
 #0:  ("events_unbound"){+.+.}, at: [<ffffffff813cd3ae>] process_one_work+0x76e/0x1600 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffff813cd3eb>] process_one_work+0x7ab/0x1600 kernel/workqueue.c:2089
4 locks held by syz-executor.5/18974:
 #0:  (&dup_mmap_sem){.+.+}, at: [<ffffffff8136c36f>] dup_mmap kernel/fork.c:606 [inline]
 #0:  (&dup_mmap_sem){.+.+}, at: [<ffffffff8136c36f>] dup_mm kernel/fork.c:1199 [inline]
 #0:  (&dup_mmap_sem){.+.+}, at: [<ffffffff8136c36f>] copy_mm kernel/fork.c:1253 [inline]
 #0:  (&dup_mmap_sem){.+.+}, at: [<ffffffff8136c36f>] copy_process.part.0+0x3caf/0x6940 kernel/fork.c:1755
 #1:  (&mm->mmap_sem){++++}, at: [<ffffffff8136c38b>] dup_mmap kernel/fork.c:607 [inline]
 #1:  (&mm->mmap_sem){++++}, at: [<ffffffff8136c38b>] dup_mm kernel/fork.c:1199 [inline]
 #1:  (&mm->mmap_sem){++++}, at: [<ffffffff8136c38b>] copy_mm kernel/fork.c:1253 [inline]
 #1:  (&mm->mmap_sem){++++}, at: [<ffffffff8136c38b>] copy_process.part.0+0x3ccb/0x6940 kernel/fork.c:1755
 #2:  (&mm->mmap_sem/1){+.+.}, at: [<ffffffff8136c3c5>] dup_mmap kernel/fork.c:616 [inline]
 #2:  (&mm->mmap_sem/1){+.+.}, at: [<ffffffff8136c3c5>] dup_mm kernel/fork.c:1199 [inline]
 #2:  (&mm->mmap_sem/1){+.+.}, at: [<ffffffff8136c3c5>] copy_mm kernel/fork.c:1253 [inline]
 #2:  (&mm->mmap_sem/1){+.+.}, at: [<ffffffff8136c3c5>] copy_process.part.0+0x3d05/0x6940 kernel/fork.c:1755
 #3:  (&mapping->i_mmap_rwsem){++++}, at: [<ffffffff8136c807>] i_mmap_lock_write include/linux/fs.h:470 [inline]
 #3:  (&mapping->i_mmap_rwsem){++++}, at: [<ffffffff8136c807>] dup_mmap kernel/fork.c:681 [inline]
 #3:  (&mapping->i_mmap_rwsem){++++}, at: [<ffffffff8136c807>] dup_mm kernel/fork.c:1199 [inline]
 #3:  (&mapping->i_mmap_rwsem){++++}, at: [<ffffffff8136c807>] copy_mm kernel/fork.c:1253 [inline]
 #3:  (&mapping->i_mmap_rwsem){++++}, at: [<ffffffff8136c807>] copy_process.part.0+0x4147/0x6940 kernel/fork.c:1755
2 locks held by syz-executor.5/5855:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5857:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5858:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5859:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5860:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5862:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5863:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5864:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5865:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5866:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5867:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5868:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5869:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5870:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5871:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5872:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5873:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5874:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5875:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5876:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5877:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5878:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5879:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5880:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5881:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5882:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5883:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5884:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5885:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5886:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5887:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5889:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5890:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5891:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5892:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5893:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5894:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5895:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5896:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5897:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5898:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5899:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5900:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5901:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5902:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5903:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5904:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5905:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5906:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5907:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5908:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5909:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5910:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5911:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5912:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5913:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5914:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5915:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5916:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5917:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5918:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5919:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5920:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5921:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5922:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5923:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5924:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5925:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5926:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5927:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5928:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5929:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5930:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5931:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5932:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5933:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5934:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5935:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5936:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5937:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5938:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5939:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5940:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5941:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5942:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5943:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5944:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5945:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5946:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5947:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5948:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5949:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5950:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5951:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5952:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5953:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5954:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5955:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5956:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5957:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5958:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5959:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5960:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5961:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5962:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5963:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5964:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5965:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5966:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5967:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5968:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5969:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5970:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5971:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5972:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5973:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5974:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5975:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5976:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5977:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5978:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5979:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5980:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5981:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5982:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5983:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5984:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5985:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5986:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5987:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5988:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5989:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5990:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5991:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5992:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5993:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5994:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5995:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5996:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5997:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5998:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/5999:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6000:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6001:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6002:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6003:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6004:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6005:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6006:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6007:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6008:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6009:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6010:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6011:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6012:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6013:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6014:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6015:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6016:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6017:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6018:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6019:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6020:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6021:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6022:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6023:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6024:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6025:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6026:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6027:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6028:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6029:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6030:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6031:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6032:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6033:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6034:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6035:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6036:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6037:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6038:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6039:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6040:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6041:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6042:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6043:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6044:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6045:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6046:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6047:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6048:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6049:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6050:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6051:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6052:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6053:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6054:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6055:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6056:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6057:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6058:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6059:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6060:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6061:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6062:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6063:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6064:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6065:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6066:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6067:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6068:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6069:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6070:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6071:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6072:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6073:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6074:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6075:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6076:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6077:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6078:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6079:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6080:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6081:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6082:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6083:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6084:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6085:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6086:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6087:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6088:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6089:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6090:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6091:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6092:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6093:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6094:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6095:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6096:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6097:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6098:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6099:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6100:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6101:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6102:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6103:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] inode_lock_nested include/linux/fs.h:750 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SYSC_mq_unlink ipc/mqueue.c:874 [inline]
 #1:  (&sb->s_type->i_mutex_key#23/1){+.+.}, at: [<ffffffff829881d4>] SyS_mq_unlink+0x1e4/0x4f0 ipc/mqueue.c:857
2 locks held by syz-executor.5/6104:
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] sb_start_write include/linux/fs.h:1545 [inline]
 #0:  (sb_writers#21){.+.+}, at: [<ffffffff819471df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2019/05/18 08:31 linux-4.14.y e6fedb8802c7 5a4461b0 .config log report
ci2-linux-4-14 2019/05/06 18:45 linux-4.14.y 6d1510d86ef6 148296f4 .config log report