INFO: task kworker/u8:10:191 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:10 state:D stack:22824 pid:191 tgid:191 ppid:2 task_flags:0x4248060 flags:0x00080000
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x171d/0x56e0 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
io_schedule+0x80/0xe0 kernel/sched/core.c:8146
bit_wait_io+0x13/0x110 kernel/sched/wait_bit.c:258
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:106 [inline]
do_get_write_access+0x667/0x10d0 fs/jbd2/transaction.c:1113
jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
__ext4_journal_get_write_access+0xec/0x620 fs/ext4/ext4_jbd2.c:253
ext4_mb_mark_context+0x171/0xec0 fs/ext4/mballoc.c:4110
ext4_mb_mark_diskspace_used+0x338/0x760 fs/ext4/mballoc.c:4239
ext4_mb_new_blocks+0x1065/0x4530 fs/ext4/mballoc.c:6327
ext4_ext_map_blocks+0x1427/0x5480 fs/ext4/extents.c:4469
ext4_map_create_blocks+0x116/0x530 fs/ext4/inode.c:697
ext4_map_blocks+0xe8e/0x1c60 fs/ext4/inode.c:942
mpage_map_one_extent fs/ext4/inode.c:2505 [inline]
mpage_map_and_submit_extent fs/ext4/inode.c:2601 [inline]
ext4_do_writepages+0x197b/0x44b0 fs/ext4/inode.c:3077
ext4_writepages+0x1fe/0x4e0 fs/ext4/inode.c:3171
do_writepages+0x338/0x560 mm/page-writeback.c:2560
__writeback_single_inode+0x136/0x1230 fs/fs-writeback.c:1800
writeback_sb_inodes+0x9db/0x1aa0 fs/fs-writeback.c:2111
__writeback_inodes_wb+0x114/0x240 fs/fs-writeback.c:2187
wb_writeback+0x42f/0xad0 fs/fs-writeback.c:2298
wb_check_old_data_flush fs/fs-writeback.c:2402 [inline]
wb_do_writeback fs/fs-writeback.c:2481 [inline]
wb_workfn+0xc98/0x10f0 fs/fs-writeback.c:2509
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
kthread+0x38b/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
INFO: task jbd2/sda1-8:4930 blocked in I/O wait 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:26280 pid:4930 tgid:4930 ppid:2 task_flags:0x240040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x171d/0x56e0 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
io_schedule+0x80/0xe0 kernel/sched/core.c:8146
bit_wait_io+0x13/0x110 kernel/sched/wait_bit.c:258
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_buffer include/linux/buffer_head.h:476 [inline]
jbd2_journal_commit_transaction+0x2f77/0x5cb0 fs/jbd2/commit.c:834
kjournald2+0x3bc/0x740 fs/jbd2/journal.c:200
kthread+0x38b/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
INFO: task syz-executor357:5638 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor357 state:D stack:25688 pid:5638 tgid:5638 ppid:5637 task_flags:0x440140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x171d/0x56e0 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
io_schedule+0x80/0xe0 kernel/sched/core.c:8146
bit_wait_io+0x13/0x110 kernel/sched/wait_bit.c:258
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:106 [inline]
do_get_write_access+0x667/0x10d0 fs/jbd2/transaction.c:1113
jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
__ext4_journal_get_write_access+0xec/0x620 fs/ext4/ext4_jbd2.c:253
ext4_delete_entry+0x24e/0x450 fs/ext4/namei.c:2728
__ext4_unlink+0x58f/0xb60 fs/ext4/namei.c:3273
ext4_unlink+0x206/0x5c0 fs/ext4/namei.c:3322
vfs_unlink+0x27b/0x6e0 fs/namei.c:5661
filename_unlinkat+0x3d3/0x610 fs/namei.c:5731
__do_sys_unlink fs/namei.c:5766 [inline]
__se_sys_unlink+0x2e/0x140 fs/namei.c:5763
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8428edde27
RSP: 002b:00007ffcf2b29918 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8428edde27
RDX: 00007ffcf2b29940 RSI: 00007ffcf2b299d0 RDI: 00007ffcf2b299d0
RBP: 00007ffcf2b299d0 R08: 00007ffcf2b2a9d0 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffcf2b2aa80
R13: 000055558d692820 R14: 0000000000023d76 R15: 00007ffcf2b2aa80
INFO: task syz-executor357:5639 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor357 state:D stack:25640 pid:5639 tgid:5639 ppid:5637 task_flags:0x440140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x171d/0x56e0 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
io_schedule+0x80/0xe0 kernel/sched/core.c:8146
bit_wait_io+0x13/0x110 kernel/sched/wait_bit.c:258
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:106 [inline]
do_get_write_access+0x667/0x10d0 fs/jbd2/transaction.c:1113
jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
__ext4_journal_get_write_access+0xec/0x620 fs/ext4/ext4_jbd2.c:253
ext4_delete_entry+0x24e/0x450 fs/ext4/namei.c:2728
__ext4_unlink+0x58f/0xb60 fs/ext4/namei.c:3273
ext4_unlink+0x206/0x5c0 fs/ext4/namei.c:3322
vfs_unlink+0x27b/0x6e0 fs/namei.c:5661
filename_unlinkat+0x3d3/0x610 fs/namei.c:5731
__do_sys_unlink fs/namei.c:5766 [inline]
__se_sys_unlink+0x2e/0x140 fs/namei.c:5763
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8428edde27
RSP: 002b:00007ffcf2b29918 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8428edde27
RDX: 00007ffcf2b29940 RSI: 00007ffcf2b299d0 RDI: 00007ffcf2b299d0
RBP: 00007ffcf2b299d0 R08: 00007ffcf2b2a9d0 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffcf2b2aa80
R13: 000055558d692820 R14: 0000000000023d07 R15: 00007ffcf2b2aa80
INFO: task syz-executor357:5640 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor357 state:D stack:25304 pid:5640 tgid:5640 ppid:5637 task_flags:0x440140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x171d/0x56e0 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
io_schedule+0x80/0xe0 kernel/sched/core.c:8146
bit_wait_io+0x13/0x110 kernel/sched/wait_bit.c:258
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:106 [inline]
do_get_write_access+0x667/0x10d0 fs/jbd2/transaction.c:1113
jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
__ext4_journal_get_write_access+0xec/0x620 fs/ext4/ext4_jbd2.c:253
ext4_delete_entry+0x24e/0x450 fs/ext4/namei.c:2728
ext4_rmdir+0x7e6/0xcc0 fs/ext4/namei.c:3187
vfs_rmdir+0x3e9/0x6b0 fs/namei.c:5527
filename_rmdir+0x292/0x520 fs/namei.c:5584
__do_sys_rmdir fs/namei.c:5607 [inline]
__se_sys_rmdir+0x2e/0x140 fs/namei.c:5604
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8428edddc7
RSP: 002b:00007ffcf2b28828 EFLAGS: 00000207 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8428edddc7
RDX: 00000000000187b1 RSI: 000055558d69a850 RDI: 00007ffcf2b299d0
RBP: 0000000000000065 R08: 0000000000010770 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000207 R12: 00007ffcf2b299d0
R13: 000055558d69a860 R14: 0000000000023cc5 R15: 00007ffcf2b2aa80
INFO: task syz-executor357:5641 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor357 state:D stack:25752 pid:5641 tgid:5641 ppid:5637 task_flags:0x440140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x171d/0x56e0 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
io_schedule+0x80/0xe0 kernel/sched/core.c:8146
bit_wait_io+0x13/0x110 kernel/sched/wait_bit.c:258
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:106 [inline]
do_get_write_access+0x667/0x10d0 fs/jbd2/transaction.c:1113
jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
__ext4_journal_get_write_access+0xec/0x620 fs/ext4/ext4_jbd2.c:253
ext4_delete_entry+0x24e/0x450 fs/ext4/namei.c:2728
ext4_rmdir+0x7e6/0xcc0 fs/ext4/namei.c:3187
vfs_rmdir+0x3e9/0x6b0 fs/namei.c:5527
filename_rmdir+0x292/0x520 fs/namei.c:5584
__do_sys_rmdir fs/namei.c:5607 [inline]
__se_sys_rmdir+0x2e/0x140 fs/namei.c:5604
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8428edddc7
RSP: 002b:00007ffcf2b28828 EFLAGS: 00000207 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8428edddc7
RDX: 00000000000187b1 RSI: 000055558d69a850 RDI: 00007ffcf2b299d0
RBP: 0000000000000065 R08: 0000000000010770 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000207 R12: 00007ffcf2b299d0
R13: 000055558d69a860 R14: 0000000000023cca R15: 00007ffcf2b2aa80
INFO: task syz-executor357:5644 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor357 state:D stack:25672 pid:5644 tgid:5644 ppid:5637 task_flags:0x440140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x171d/0x56e0 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
io_schedule+0x80/0xe0 kernel/sched/core.c:8146
bit_wait_io+0x13/0x110 kernel/sched/wait_bit.c:258
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:106 [inline]
do_get_write_access+0x667/0x10d0 fs/jbd2/transaction.c:1113
jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
__ext4_journal_get_write_access+0xec/0x620 fs/ext4/ext4_jbd2.c:253
ext4_free_inode+0x5dc/0x1020 fs/ext4/ialloc.c:305
ext4_evict_inode+0xeb3/0x1350 fs/ext4/inode.c:386
evict+0x624/0xb50 fs/inode.c:822
filename_unlinkat+0x445/0x610 fs/namei.c:5735
__do_sys_unlink fs/namei.c:5766 [inline]
__se_sys_unlink+0x2e/0x140 fs/namei.c:5763
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8428edde27
RSP: 002b:00007ffcf2b29918 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8428edde27
RDX: 00007ffcf2b29940 RSI: 00007ffcf2b299d0 RDI: 00007ffcf2b299d0
RBP: 00007ffcf2b299d0 R08: 00007ffcf2b2a9d0 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffcf2b2aa80
R13: 000055558d692820 R14: 0000000000023d05 R15: 00007ffcf2b2aa80
Showing all locks held in the system:
locks held by kworker/u8:1/13: 2, on CPU#1:
#0: ffff88813fe3c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffff88813fe3c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffff88813fe3c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
#0: ffff88813fe3c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
#1: ffffc90000127c40 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffc90000127c40 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffc90000127c40 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
#1: ffffc90000127c40 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
locks held by khungtaskd/39: 1, last CPU#0:
#0: ffffffff8f3c1640 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffffffff8f3c1640 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8f3c1640 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6871
locks held by kworker/u8:10/191: 6, on CPU#1:
#0: ffff8880206b7940 ((wq_completion)writeback){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffff8880206b7940 ((wq_completion)writeback){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffff8880206b7940 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
#0: ffff8880206b7940 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
#1: ffffc90004187c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffc90004187c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffc90004187c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
#1: ffffc90004187c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
#2: ffff888037f760e0 (&type->s_umount_key#33){++++}-{4:4}, at: super_trylock_shared+0x23/0xf0 fs/super.c:670
#3: ffff888037f50d98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x1f1/0x4e0 fs/ext4/inode.c:3170
#4: ffff888037f72bd0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
#5: ffff8880415c6810 (&ei->i_data_sem#2){++++}-{4:4}, at: ext4_map_blocks+0xacb/0x1c60 fs/ext4/inode.c:926
locks held by getty/5357: 2, on CPU#0:
#0: ffff88802b8480a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900044db2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x460/0x1360 drivers/tty/n_tty.c:2211
locks held by syz-executor357/5638: 4, on CPU#0:
#0: ffff888037f76510 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:531
#1: ffff888045138428 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1069 [inline]
#1: ffff888045138428 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2918 [inline]
#1: ffff888045138428 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2942 [inline]
#1: ffff888045138428 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_unlinkat+0x2ad/0x610 fs/namei.c:5712
#2: ffff888045173c90 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#2: ffff888045173c90 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: vfs_unlink+0xd5/0x6e0 fs/namei.c:5647
#3: ffff888037f72bd0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz-executor357/5639: 4, on CPU#0:
#0: ffff888037f76510 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:531
#1: ffff8880451347d8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1069 [inline]
#1: ffff8880451347d8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2918 [inline]
#1: ffff8880451347d8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2942 [inline]
#1: ffff8880451347d8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_unlinkat+0x2ad/0x610 fs/namei.c:5712
#2: ffff888045133148 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#2: ffff888045133148 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: vfs_unlink+0xd5/0x6e0 fs/namei.c:5647
#3: ffff888037f72bd0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz-executor357/5640: 4, on CPU#0:
#0: ffff888037f76510 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:531
#1: ffff88804513bc90 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1069 [inline]
#1: ffff88804513bc90 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2918 [inline]
#1: ffff88804513bc90 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2942 [inline]
#1: ffff88804513bc90 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_rmdir+0x1cd/0x520 fs/namei.c:5577
#2: ffff888045133c90 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#2: ffff888045133c90 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: vfs_rmdir+0xf8/0x6b0 fs/namei.c:5512
#3: ffff888037f72bd0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz-executor357/5641: 4, on CPU#0:
#0: ffff888037f76510 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:531
#1: ffff888045135e68 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1069 [inline]
#1: ffff888045135e68 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2918 [inline]
#1: ffff888045135e68 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2942 [inline]
#1: ffff888045135e68 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_rmdir+0x1cd/0x520 fs/namei.c:5577
#2: ffff888045139ab8 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#2: ffff888045139ab8 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: vfs_rmdir+0xf8/0x6b0 fs/namei.c:5512
#3: ffff888037f72bd0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz-executor357/5644: 3, on CPU#0:
#0: ffff888037f76510 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:531
#1: ffff888037f76800 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs/super.h:177 [inline]
#1: ffff888037f76800 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x4a5/0x1350 fs/ext4/inode.c:296
#2: ffff888037f72bd0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 39 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:123
nmi_trigger_cpumask_backtrace+0x17d/0x390 lib/nmi_backtrace.c:66
trigger_all_cpu_backtrace include/linux/nmi.h:164 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:377 [inline]
watchdog+0x1073/0x10f0 kernel/hung_task.c:598
kthread+0x38b/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 4956 Comm: klogd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x11/0xb0 kernel/rcu/tree.c:753
Code: 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 65 48 ff 05 1f 5c 23 12 3a 60 c6 09 89 c3 83 f8 08 73 66 49 bf 00 00 00 00 00 fc ff df
RSP: 0018:ffffc900044b75d8 EFLAGS: 00000003
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880b843cae0
RBP: ffffc900044b78e0 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1002501546 R12: ffff8880b843cae0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001
FS: 00007f42c4a82c80(0000) GS:ffff888124727000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b107de9660 CR3: 0000000038668000 CR4: 00000000003526f0
Call Trace:
trace_lock_acquire include/trace/events/lock.h:23 [inline]
lock_acquire+0x58/0x350 kernel/locking/lockdep.c:5905
_raw_spin_lock_nested+0x32/0x50 kernel/locking/spinlock.c:413
raw_spin_rq_lock_nested+0x2d/0x160 kernel/sched/core.c:677
raw_spin_rq_lock kernel/sched/sched.h:1688 [inline]
rq_lock kernel/sched/sched.h:2026 [inline]
__schedule+0x35e/0x56e0 kernel/sched/core.c:7254
preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7561
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
class_preempt_destructor include/linux/preempt.h:496 [inline]
try_to_wake_up+0x890/0x1430 kernel/sched/core.c:4495
autoremove_wake_function+0x17/0x100 kernel/sched/wait.c:391
__wake_up_common kernel/sched/wait.c:108 [inline]
__wake_up_common_lock+0x13a/0x1f0 kernel/sched/wait.c:125
sock_def_readable+0x1ee/0x550 net/core/sock.c:3739
unix_dgram_sendmsg+0xd55/0x17e0 net/unix/af_unix.c:2304
sock_sendmsg_nosec+0x14e/0x190 net/socket.c:800
__sock_sendmsg net/socket.c:818 [inline]
__sys_sendto+0x41e/0x5d0 net/socket.c:2283
__do_sys_sendto net/socket.c:2290 [inline]
__se_sys_sendto net/socket.c:2286 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2286
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f42c4bd2407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffc5a3f8770 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f42c4a82c80 RCX: 00007f42c4bd2407
RDX: 0000000000000049 RSI: 00007ffc5a3f88b0 RDI: 0000000000000003
RBP: 00007ffc5a3f8ce0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000202 R12: 00007ffc5a3f8cf8
R13: 00007ffc5a3f88b0 R14: 000000000000002e R15: 00007ffc5a3f88b0
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.166 msecs