INFO: task kworker/u4:5:72 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:5 state:D stack:22960 pid:72 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
context_switch kernel/sched/core.c:5393 [inline]
__schedule+0x156f/0x4720 kernel/sched/core.c:6722
schedule+0xbd/0x170 kernel/sched/core.c:6796
io_schedule+0x80/0xd0 kernel/sched/core.c:9075
bit_wait_io+0x13/0x100 kernel/sched/wait_bit.c:209
__wait_on_bit+0x9f/0x2c0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x13c/0x190 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:101 [inline]
do_get_write_access+0x5c9/0xe00 fs/jbd2/transaction.c:1096
jbd2_journal_get_write_access+0x10c/0x140 fs/jbd2/transaction.c:1231
__ext4_journal_get_write_access+0x208/0x6d0 fs/ext4/ext4_jbd2.c:241
ext4_mb_mark_diskspace_used+0x27c/0x14b0 fs/ext4/mballoc.c:4055
ext4_mb_new_blocks+0x105b/0x42f0 fs/ext4/mballoc.c:6277
ext4_ext_map_blocks+0x1811/0x68c0 fs/ext4/extents.c:4416
ext4_map_blocks+0x9db/0x1a90 fs/ext4/inode.c:654
mpage_map_one_extent fs/ext4/inode.c:2205 [inline]
mpage_map_and_submit_extent fs/ext4/inode.c:2258 [inline]
ext4_do_writepages+0x1463/0x3990 fs/ext4/inode.c:2733
ext4_writepages+0x1dd/0x350 fs/ext4/inode.c:2822
do_writepages+0x351/0x590 mm/page-writeback.c:2575
__writeback_single_inode+0x14e/0xee0 fs/fs-writeback.c:1701
writeback_sb_inodes+0x813/0x1020 fs/fs-writeback.c:1992
__writeback_inodes_wb+0x114/0x240 fs/fs-writeback.c:2063
wb_writeback+0x472/0xbe0 fs/fs-writeback.c:2173
wb_check_old_data_flush fs/fs-writeback.c:2277 [inline]
wb_do_writeback fs/fs-writeback.c:2330 [inline]
wb_workfn+0xad7/0xe60 fs/fs-writeback.c:2358
process_one_work kernel/workqueue.c:2657 [inline]
process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734
worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
INFO: task jbd2/sda1-8:5114 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jbd2/sda1-8 state:D stack:26024 pid:5114 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5393 [inline]
__schedule+0x156f/0x4720 kernel/sched/core.c:6722
schedule+0xbd/0x170 kernel/sched/core.c:6796
io_schedule+0x80/0xd0 kernel/sched/core.c:9075
bit_wait_io+0x13/0x100 kernel/sched/wait_bit.c:209
__wait_on_bit+0x9f/0x2c0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x13c/0x190 kernel/sched/wait_bit.c:64
wait_on_buffer include/linux/buffer_head.h:373 [inline]
jbd2_journal_commit_transaction+0x2e90/0x5ad0 fs/jbd2/commit.c:815
kjournald2+0x40f/0x810 fs/jbd2/journal.c:201
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
INFO: task syz.0.49:5986 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.49 state:D stack:26088 pid:5986 ppid:5780 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5393 [inline]
__schedule+0x156f/0x4720 kernel/sched/core.c:6722
schedule+0xbd/0x170 kernel/sched/core.c:6796
io_schedule+0x80/0xd0 kernel/sched/core.c:9075
bit_wait_io+0x13/0x100 kernel/sched/wait_bit.c:209
__wait_on_bit+0x9f/0x2c0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x13c/0x190 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:101 [inline]
do_get_write_access+0x5c9/0xe00 fs/jbd2/transaction.c:1096
jbd2_journal_get_write_access+0x10c/0x140 fs/jbd2/transaction.c:1231
__ext4_journal_get_write_access+0x208/0x6d0 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x205/0x2a0 fs/ext4/inode.c:5967
__ext4_mark_inode_dirty+0x13f/0x720 fs/ext4/inode.c:6151
ext4_dirty_inode+0xcb/0x110 fs/ext4/inode.c:6188
__mark_inode_dirty+0x2cc/0xc90 fs/fs-writeback.c:2537
generic_update_time fs/inode.c:1978 [inline]
inode_update_time fs/inode.c:1991 [inline]
__file_update_time fs/inode.c:2177 [inline]
file_update_time+0x187/0x1a0 fs/inode.c:2207
ext4_page_mkwrite+0x1f9/0x11a0 fs/ext4/inode.c:6306
do_page_mkwrite+0x153/0x3f0 mm/memory.c:2951
do_shared_fault mm/memory.c:4717 [inline]
do_fault mm/memory.c:4779 [inline]
do_pte_missing mm/memory.c:3689 [inline]
handle_pte_fault mm/memory.c:5047 [inline]
__handle_mm_fault mm/memory.c:5190 [inline]
handle_mm_fault+0x1a26/0x4a40 mm/memory.c:5355
do_user_addr_fault+0xeb7/0x13e0 arch/x86/mm/fault.c:1371
handle_page_fault arch/x86/mm/fault.c:1463 [inline]
exc_page_fault+0x64/0x100 arch/x86/mm/fault.c:1516
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7f1f0a674812
RSP: 002b:00007ffc495d8fd0 EFLAGS: 00010202
RAX: 000000000000c008 RBX: 00007f1f0b555720 RCX: 0000000000000000
RDX: 0000001b2e218000 RSI: 0000000000000008 RDI: 00007f1f0b555720
RBP: 00000000000008ac R08: 00007f1f0aa10000 R09: 00007f1f0aa25f40
R10: 0000000000000000 R11: 00000000000000ff R12: ffffffff8a8371d9
R13: 00007f1f0aa25f40 R14: 00000000000000f4 R15: ffffffffffff4000
INFO: task syz.1.54:5993 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.54 state:D stack:26536 pid:5993 ppid:5781 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5393 [inline]
__schedule+0x156f/0x4720 kernel/sched/core.c:6722
schedule+0xbd/0x170 kernel/sched/core.c:6796
io_schedule+0x80/0xd0 kernel/sched/core.c:9075
bit_wait_io+0x13/0x100 kernel/sched/wait_bit.c:209
__wait_on_bit+0x9f/0x2c0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x13c/0x190 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:101 [inline]
do_get_write_access+0x5c9/0xe00 fs/jbd2/transaction.c:1096
jbd2_journal_get_write_access+0x10c/0x140 fs/jbd2/transaction.c:1231
__ext4_journal_get_write_access+0x208/0x6d0 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x205/0x2a0 fs/ext4/inode.c:5967
__ext4_mark_inode_dirty+0x13f/0x720 fs/ext4/inode.c:6151
ext4_dirty_inode+0xcb/0x110 fs/ext4/inode.c:6188
__mark_inode_dirty+0x2cc/0xc90 fs/fs-writeback.c:2537
generic_update_time fs/inode.c:1978 [inline]
inode_update_time fs/inode.c:1991 [inline]
__file_update_time fs/inode.c:2177 [inline]
file_update_time+0x187/0x1a0 fs/inode.c:2207
ext4_page_mkwrite+0x1f9/0x11a0 fs/ext4/inode.c:6306
do_page_mkwrite+0x153/0x3f0 mm/memory.c:2951
do_shared_fault mm/memory.c:4717 [inline]
do_fault mm/memory.c:4779 [inline]
do_pte_missing mm/memory.c:3689 [inline]
handle_pte_fault mm/memory.c:5047 [inline]
__handle_mm_fault mm/memory.c:5190 [inline]
handle_mm_fault+0x1a26/0x4a40 mm/memory.c:5355
do_user_addr_fault+0xeb7/0x13e0 arch/x86/mm/fault.c:1371
handle_page_fault arch/x86/mm/fault.c:1463 [inline]
exc_page_fault+0x64/0x100 arch/x86/mm/fault.c:1516
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7f88c4674812
RSP: 002b:00007fff022885d0 EFLAGS: 00010202
RAX: 0000000000015008 RBX: 00007f88c5555720 RCX: 0000000000000000
RDX: 0000001b2e30f000 RSI: 0000000000000008 RDI: 00007f88c5555720
RBP: 0000000000000a22 R08: 00007f88c4a10000 R09: 00007f88c4a25f40
R10: 0000000000000000 R11: 00000000000000ff R12: ffffffff8a887ddf
R13: 00007f88c4a25f40 R14: 000000000000002f R15: fffffffffffeb000
INFO: task syz.3.67:6026 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.67 state:D stack:27048 pid:6026 ppid:5782 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5393 [inline]
__schedule+0x156f/0x4720 kernel/sched/core.c:6722
schedule+0xbd/0x170 kernel/sched/core.c:6796
io_schedule+0x80/0xd0 kernel/sched/core.c:9075
bit_wait_io+0x13/0x100 kernel/sched/wait_bit.c:209
__wait_on_bit+0x9f/0x2c0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x13c/0x190 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:101 [inline]
do_get_write_access+0x5c9/0xe00 fs/jbd2/transaction.c:1096
jbd2_journal_get_write_access+0x10c/0x140 fs/jbd2/transaction.c:1231
__ext4_journal_get_write_access+0x208/0x6d0 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x205/0x2a0 fs/ext4/inode.c:5967
__ext4_mark_inode_dirty+0x13f/0x720 fs/ext4/inode.c:6151
ext4_dirty_inode+0xcb/0x110 fs/ext4/inode.c:6188
__mark_inode_dirty+0x2cc/0xc90 fs/fs-writeback.c:2537
generic_update_time fs/inode.c:1978 [inline]
inode_update_time fs/inode.c:1991 [inline]
__file_update_time fs/inode.c:2177 [inline]
file_update_time+0x187/0x1a0 fs/inode.c:2207
ext4_page_mkwrite+0x1f9/0x11a0 fs/ext4/inode.c:6306
do_page_mkwrite+0x153/0x3f0 mm/memory.c:2951
do_shared_fault mm/memory.c:4717 [inline]
do_fault mm/memory.c:4779 [inline]
do_pte_missing mm/memory.c:3689 [inline]
handle_pte_fault mm/memory.c:5047 [inline]
__handle_mm_fault mm/memory.c:5190 [inline]
handle_mm_fault+0x1a26/0x4a40 mm/memory.c:5355
do_user_addr_fault+0xeb7/0x13e0 arch/x86/mm/fault.c:1371
handle_page_fault arch/x86/mm/fault.c:1463 [inline]
exc_page_fault+0x64/0x100 arch/x86/mm/fault.c:1516
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7f86aee740b1
RSP: 002b:00007ffc57cac9c0 EFLAGS: 00010202
RAX: 0000001b2e523000 RBX: ffffffff8a8a7b8d RCX: 0000001b2e522ff8
RDX: 0000001b2df2421c RSI: 0000000000000008 RDI: 00007f86afd55720
RBP: 0000000000000189 R08: 00007f86af210000 R09: 00007f86af212000
R10: 000000008a8a7b91 R11: 0000000000000001 R12: 00007f86af226038
R13: 0000000000002765 R14: ffffffff8a8a7a0b R15: 00007f86afd55720
INFO: task syz-executor:6028 blocked for more than 145 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:25608 pid:6028 ppid:5769 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5393 [inline]
__schedule+0x156f/0x4720 kernel/sched/core.c:6722
schedule+0xbd/0x170 kernel/sched/core.c:6796
io_schedule+0x80/0xd0 kernel/sched/core.c:9075
bit_wait_io+0x13/0x100 kernel/sched/wait_bit.c:209
__wait_on_bit+0x9f/0x2c0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x13c/0x190 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:101 [inline]
do_get_write_access+0x5c9/0xe00 fs/jbd2/transaction.c:1096
jbd2_journal_get_write_access+0x10c/0x140 fs/jbd2/transaction.c:1231
__ext4_journal_get_write_access+0x208/0x6d0 fs/ext4/ext4_jbd2.c:241
__ext4_new_inode+0x140c/0x3aa0 fs/ext4/ialloc.c:1101
ext4_mkdir+0x40b/0xc90 fs/ext4/namei.c:3068
vfs_mkdir+0x2a5/0x470 fs/namei.c:4180
do_mkdirat+0x1dc/0x450 fs/namei.c:4203
__do_sys_mkdir fs/namei.c:4223 [inline]
__se_sys_mkdir fs/namei.c:4221 [inline]
__x64_sys_mkdir+0x6e/0x80 fs/namei.c:4221
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fbcc4dccee7
RSP: 002b:00007ffdda029708 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007ffdda029832 RCX: 00007fbcc4dccee7
RDX: 000000000e21f53e RSI: 00000000000001c0 RDI: 00007ffdda029820
RBP: 8421084210842109 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000e21f53e
R13: 00007ffdda029832 R14: 0000000000000004 R15: 00007fbcc4e5e580
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e1322e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#0: ffffffff8e1322e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#0: ffffffff8e1322e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6669
7 locks held by kworker/u4:5/72:
#0: ffff888140e64538 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2632 [inline]
#0: ffff888140e64538 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x975/0x1600 kernel/workqueue.c:2734
#1: ffffc900015e7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2632 [inline]
#1: ffffc900015e7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x975/0x1600 kernel/workqueue.c:2734
#2: ffff88814d9160e0 (&type->s_umount_key#31){++++}-{3:3}, at: super_trylock_shared+0x20/0xf0 fs/super.c:604
#3: ffff88814d918c58 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages_down_read fs/ext4/ext4.h:1770 [inline]
#3: ffff88814d918c58 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x1a4/0x350 fs/ext4/inode.c:2821
#4: ffff88814d91a990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f3f/0x2170 fs/jbd2/transaction.c:448
#5: ffff88803296f088 (&ei->i_data_sem){++++}-{3:3}, at: ext4_map_blocks+0x918/0x1a90 fs/ext4/inode.c:647
#6: ffffe8ffffc1fa58 (&lg->lg_mutex){+.+.}-{3:3}, at: ext4_mb_group_or_file fs/ext4/mballoc.c:5827 [inline]
#6: ffffe8ffffc1fa58 (&lg->lg_mutex){+.+.}-{3:3}, at: ext4_mb_initialize_context+0x8af/0xc80 fs/ext4/mballoc.c:5871
2 locks held by getty/5538:
#0: ffff88814c7650a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000327e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x43a/0x1400 drivers/tty/n_tty.c:2217
3 locks held by syz-executor/5769:
#0: ffff88807e64f3a0 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
#0: ffff88807e64f3a0 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5382 [inline]
#0: ffff88807e64f3a0 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:5442
#1: ffff88814d916510 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1634 [inline]
#1: ffff88814d916510 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1738 [inline]
#1: ffff88814d916510 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1e2/0x11a0 fs/ext4/inode.c:6305
#2: ffff88814d91a990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f3f/0x2170 fs/jbd2/transaction.c:448
3 locks held by syz.0.49/5986:
#0: ffff888025d6cda0 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
#0: ffff888025d6cda0 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5382 [inline]
#0: ffff888025d6cda0 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:5442
#1: ffff88814d916510 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1634 [inline]
#1: ffff88814d916510 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1738 [inline]
#1: ffff88814d916510 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1e2/0x11a0 fs/ext4/inode.c:6305
#2: ffff88814d91a990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f3f/0x2170 fs/jbd2/transaction.c:448
3 locks held by syz.1.54/5993:
#0: ffff88802a62ea20 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
#0: ffff88802a62ea20 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5382 [inline]
#0: ffff88802a62ea20 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:5442
#1: ffff88814d916510 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1634 [inline]
#1: ffff88814d916510 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1738 [inline]
#1: ffff88814d916510 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1e2/0x11a0 fs/ext4/inode.c:6305
#2: ffff88814d91a990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f3f/0x2170 fs/jbd2/transaction.c:448
1 lock held by udevd/6024:
#0: ffff888028789988 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: prepare_bprm_creds fs/exec.c:1518 [inline]
#0: ffff888028789988 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve+0xc8/0x1730 fs/exec.c:1873
3 locks held by syz.3.67/6026:
#0: ffff888079a0b120 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
#0: ffff888079a0b120 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5382 [inline]
#0: ffff888079a0b120 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:5442
#1: ffff88814d916510 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1634 [inline]
#1: ffff88814d916510 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1738 [inline]
#1: ffff88814d916510 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1e2/0x11a0 fs/ext4/inode.c:6305
#2: ffff88814d91a990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f3f/0x2170 fs/jbd2/transaction.c:448
3 locks held by syz-executor/6028:
#0: ffff88814d916418 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff888078539810 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:839 [inline]
#1: ffff888078539810 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x20f/0x450 fs/namei.c:3949
#2: ffff88814d91a990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f3f/0x2170 fs/jbd2/transaction.c:448
2 locks held by syz-executor/6198:
#0: ffff88814d916418 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff888078539810 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:839 [inline]
#1: ffff888078539810 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x20f/0x450 fs/namei.c:3949
2 locks held by dhcpcd/6345:
#0: ffff88805b82fa20 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
#0: ffff88805b82fa20 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: __sock_release net/socket.c:658 [inline]
#0: ffff88805b82fa20 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: sock_close+0x82/0x210 net/socket.c:1421
#1: ffffffff8e137cb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#1: ffffffff8e137cb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x306/0x880 kernel/rcu/tree_exp.h:1004
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Call Trace:
dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
nmi_cpu_backtrace+0x3a6/0x3e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x2f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf59/0xfa0 kernel/hung_task.c:379
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2968 Comm: kworker/u4:8 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:mark_held_locks kernel/locking/lockdep.c:4292 [inline]
RIP: 0010:__trace_hardirqs_on_caller kernel/locking/lockdep.c:4328 [inline]
RIP: 0010:lockdep_hardirqs_on_prepare+0x345/0x7d0 kernel/locking/lockdep.c:4387
Code: 41 0f b6 04 16 84 c0 0f 85 91 03 00 00 83 3e 00 0f 8e 0f 01 00 00 4c 8d bb e8 0a 00 00 49 89 dc 49 81 c4 08 0b 00 00 45 31 ed <49> 83 fd 31 73 73 4c 89 e0 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 85
RSP: 0018:ffffc9000c0272c0 EFLAGS: 00000093
RAX: 0000000000000004 RBX: ffff88802d4abc00 RCX: ffffffff81699dd4
RDX: dffffc0000000000 RSI: ffff88802d4ac6e0 RDI: ffffffff922235f8
RBP: ffffc9000c027368 R08: ffffffff922235ff R09: 1ffffffff24446bf
R10: dffffc0000000000 R11: fffffbfff24446c0 R12: ffff88802d4ac758
R13: 0000000000000002 R14: 1ffff11005a958dc R15: ffff88802d4ac738
FS: 0000000000000000(0000) GS:ffff8880b8d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055638eddf168 CR3: 000000000df32000 CR4: 00000000003506e0
Call Trace:
trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:61
__local_bh_enable_ip+0x13a/0x1c0 kernel/softirq.c:411
spin_unlock_bh include/linux/spinlock.h:396 [inline]
cfg80211_inform_single_bss_frame_data net/wireless/scan.c:3007 [inline]
cfg80211_inform_bss_frame_data+0xb2a/0x1330 net/wireless/scan.c:3032
ieee80211_bss_info_update+0x789/0x9f0 net/mac80211/scan.c:211
ieee80211_rx_bss_info net/mac80211/ibss.c:1123 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1612 [inline]
ieee80211_ibss_rx_queued_mgmt+0x18f5/0x2dc0 net/mac80211/ibss.c:1641
ieee80211_iface_process_skb net/mac80211/iface.c:1690 [inline]
ieee80211_iface_work+0x730/0xc90 net/mac80211/iface.c:1744
cfg80211_wiphy_work+0x228/0x260 net/wireless/core.c:444
process_one_work kernel/workqueue.c:2657 [inline]
process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734
worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293