INFO: task syz-executor.0:8413 blocked for more than 143 seconds.
Not tainted 6.0.0-rc3-syzkaller-00007-gdcf8e5633e2e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:29184 pid: 8413 ppid: 23818 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
rwsem_down_read_slowpath+0x59f/0xb10 kernel/locking/rwsem.c:1087
__down_read_common kernel/locking/rwsem.c:1252 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0xe2/0x450 kernel/locking/rwsem.c:1501
get_super+0x12c/0x250 fs/super.c:794
fsync_bdev+0x14/0xc0 block/bdev.c:215
blkdev_flushbuf block/ioctl.c:352 [inline]
blkdev_common_ioctl+0x10d0/0x1a30 block/ioctl.c:477
blkdev_ioctl+0x2be/0x800 block/ioctl.c:608
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa57c689279
RSP: 002b:00007fa57d8cc168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa57c79bf80 RCX: 00007fa57c689279
RDX: 0000000000000000 RSI: 0000000000001261 RDI: 0000000000000003
RBP: 00007fa57c6e3189 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff1fe5d1af R14: 00007fa57d8cc300 R15: 0000000000022000
Showing all locks held in the system:
3 locks held by kworker/u4:1/11:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8bf85d30
(rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8bf85a30 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8bf86880 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6492
1 lock held by udevd/2973:
2 locks held by getty/3295:
#0: ffff88801c477098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90001c182f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef0/0x13e0 drivers/tty/n_tty.c:2177
1 lock held by syz-executor.5/3635:
#0: ffffffff8bf91538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#0: ffffffff8bf91538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x562/0x670 kernel/rcu/tree_exp.h:940
1 lock held by syz-executor.3/3636:
#0: ffffffff8bf91538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline]
#0: ffffffff8bf91538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x24a/0x670 kernel/rcu/tree_exp.h:940
1 lock held by syz-executor.0/23762:
2 locks held by kworker/1:0/23792:
#0: ffff888011876538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888011876538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888011876538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888011876538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888011876538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888011876538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc90000d2fda8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
1 lock held by syz-executor.2/23859:
1 lock held by syz-executor.1/23860:
3 locks held by kworker/u4:2/6411:
1 lock held by syz-executor.0/8413:
#0: ffff88803f8760e0 (&type->s_umount_key#78){++++}-{3:3}, at: get_super+0x12c/0x250 fs/super.c:794
1 lock held by syz-executor.2/10924:
#0: ffff8880b9a3a018 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:544
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc3-syzkaller-00007-gdcf8e5633e2e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xc18/0xf50 kernel/hung_task.c:369
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10932 Comm: syz-executor.3 Not tainted 6.0.0-rc3-syzkaller-00007-gdcf8e5633e2e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:__filemap_get_folio+0x0/0xed0 mm/filemap.c:1916
Code: 36 1e 23 00 48 0f ba 33 00 eb 82 e8 da 72 d7 ff 0f 0b e9 51 ff ff ff 4c 89 e7 e8 6b 1b 23 00 e9 25 ff ff ff e8 c1 64 db 07 90 <41> 57 41 89 cf 48 b9 00 00 00 00 00 fc ff df 41 56 41 55 41 89 d5
RSP: 0018:ffffc90004c278d8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 00000000000011d2 RDI: ffff88801e912c38
RBP: ffff88801e912c38 R08: 0000000000000005 R09: 000000000000003f
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000000011d2
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000555556f03400(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4ffd99d0b0 CR3: 000000015449d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
pagecache_get_page+0x2e/0x290 mm/folio-compat.c:104
find_get_page_flags include/linux/pagemap.h:569 [inline]
__find_get_block_slow fs/buffer.c:202 [inline]
__find_get_block fs/buffer.c:1307 [inline]
__find_get_block+0x4b5/0xe20 fs/buffer.c:1301
__getblk_gfp+0x28/0x80 fs/buffer.c:1329
sb_getblk include/linux/buffer_head.h:352 [inline]
ext4_getblk+0x20d/0x750 fs/ext4/inode.c:868
ext4_bread_batch+0x7e/0x4a0 fs/ext4/inode.c:935
__ext4_find_entry+0x451/0x1030 fs/ext4/namei.c:1646
ext4_lookup_entry fs/ext4/namei.c:1747 [inline]
ext4_lookup fs/ext4/namei.c:1815 [inline]
ext4_lookup+0x4fc/0x700 fs/ext4/namei.c:1806
__lookup_hash+0x117/0x180 fs/namei.c:1601
filename_create+0x1d6/0x4a0 fs/namei.c:3785
do_symlinkat+0xc4/0x2e0 fs/namei.c:4397
__do_sys_symlinkat fs/namei.c:4424 [inline]
__se_sys_symlinkat fs/namei.c:4421 [inline]
__x64_sys_symlinkat+0x93/0xc0 fs/namei.c:4421
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f2016a88b87
Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0a 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdbb443868 EFLAGS: 00000202 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2016a88b87
RDX: 00007f2016ae3235 RSI: 00000000ffffff9c RDI: 00007ffdbb443930
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffdbb443700
R10: 00007ffdbb4435b7 R11: 0000000000000202 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffdbb443930