INFO: task syz.7.171:7597 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.171 state:D stack:24744 pid:7597 tgid:7568 ppid:6916 task_flags:0x40044c flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x16dc/0x5500 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7326
io_schedule+0x80/0xe0 kernel/sched/core.c:8154
__lock_metapage fs/jfs/jfs_metapage.c:52 [inline]
lock_metapage+0x1fe/0x400 fs/jfs/jfs_metapage.c:66
__get_metapage+0x47a/0xdf0 fs/jfs/jfs_metapage.c:749
diIAGRead+0xce/0x140 fs/jfs/jfs_imap.c:2672
diFree+0x9ce/0x2cc0 fs/jfs/jfs_imap.c:959
jfs_evict_inode+0x324/0x430 fs/jfs/inode.c:162
evict+0x624/0xb50 fs/inode.c:825
dentry_kill+0x1b9/0x880 fs/dcache.c:826
finish_dput+0x1a/0x260 fs/dcache.c:1001
__fput+0x699/0xa80 fs/file_table.c:520
task_work_run+0x1d9/0x270 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x73a/0x2360 kernel/exit.c:1004
do_group_exit+0x22d/0x2f0 kernel/exit.c:1147
get_signal+0x121b/0x12c0 kernel/signal.c:3038
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x104/0x730 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6fff1ecc87
RSP: 002b:00007f6ffcbbde08 EFLAGS: 00000246 ORIG_RAX: 000000000000000b
RAX: 0000000000000000 RBX: 0000000001000000 RCX: 00007f6fff1ecc87
RDX: 0000000001000000 RSI: 0000000008400000 RDI: 00007f6ff479e000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 00007f6ffcbbdee0 R14: 00007f6ffcbbdea0 R15: 00007f6ff479e000
Showing all locks held in the system:
1 lock held by khungtaskd/38:
#0: ffffffff8dfc2fc0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8dfc2fc0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffffffff8dfc2fc0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by kworker/u8:2/43:
#0: ffff88801a084138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
#0: ffff88801a084138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
#1: ffffc90000b47c40 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
#1: ffffc90000b47c40 (connector_reaper_work){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
2 locks held by getty/5352:
#0: ffff888035c5c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90003cbe2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x460/0x1360 drivers/tty/n_tty.c:2211
6 locks held by kworker/0:8/6791:
7 locks held by syz-executor/7243:
2 locks held by syz.7.171/7597:
#0: ffff88802d470900 (&(imap->im_aglock[index])){+.+.}-{4:4}, at: diFree+0x2da/0x2cc0 fs/jfs/jfs_imap.c:889
#1: ffff888040bf0b10 (&jfs_ip->rdwrlock/1){.+.+}-{4:4}, at: diFree+0x2f8/0x2cc0 fs/jfs/jfs_imap.c:894
1 lock held by udevd/8555:
2 locks held by syz-executor/8920:
2 locks held by syz.2.427/9687:
#0: ffff88803ee60d28 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x252/0x320 fs/file.c:1259
#1: ffff88802aefc500 (sb_writers#21){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2728 [inline]
#1: ffff88802aefc500 (sb_writers#21){.+.+}-{0:0}, at: vfs_write+0x231/0xbb0 fs/read_write.c:683
3 locks held by syz.9.430/9664:
1 lock held by syz.0.432/9680:
#0: ffff8880656dc0d0 (&type->s_umount_key#32){++++}-{4:4}, at: do_remount fs/namespace.c:3404 [inline]
#0: ffff8880656dc0d0 (&type->s_umount_key#32){++++}-{4:4}, at: path_mount+0xd04/0x1040 fs/namespace.c:4153
3 locks held by dhcpcd-run-hook/9685:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:122
nmi_trigger_cpumask_backtrace+0x17a/0x380 lib/nmi_backtrace.c:65
trigger_all_cpu_backtrace include/linux/nmi.h:162 [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:353 [inline]
watchdog+0xfd7/0x1030 kernel/hung_task.c:561
kthread+0x388/0x470 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: 7243 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:mark_lock_accessed kernel/locking/lockdep.c:1530 [inline]
RIP: 0010:__bfs kernel/locking/lockdep.c:1768 [inline]
RIP: 0010:__bfs_backwards kernel/locking/lockdep.c:1860 [inline]
RIP: 0010:check_irq_usage kernel/locking/lockdep.c:2796 [inline]
RIP: 0010:check_prev_add kernel/locking/lockdep.c:3169 [inline]
RIP: 0010:check_prevs_add kernel/locking/lockdep.c:3284 [inline]
RIP: 0010:validate_chain kernel/locking/lockdep.c:3908 [inline]
RIP: 0010:__lock_acquire+0x17bd/0x2ce0 kernel/locking/lockdep.c:5237
Code: 05 28 d8 d8 13 4d 85 ff 0f 84 ac 01 00 00 49 8b 47 10 48 85 c0 0f 84 38 0d 00 00 8b 0d 14 d8 d8 13 39 48 5c 0f 84 6a ff ff ff <89> 48 5c 49 8b 47 30 48 85 c0 74 23 41 0f b6 4f 2a 89 ca 80 e2 fa
RSP: 0018:ffffc90003d97710 EFLAGS: 00000083
RAX: ffffffff93203610 RBX: 00000000000003cd RCX: 00000000000e4a03
RDX: ffffffff96066888 RSI: ffff888030c46958 RDI: 00000000000003cd
RBP: 3985c0ad062f0e33 R08: ffffc90003d976d8 R09: 0000000000000020
R10: 0000000000000000 R11: ffffffff81a124a0 R12: 000000000000011f
R13: ffff888030c46958 R14: ffff888030c45d00 R15: ffffffff960d2598
FS: 0000555583800500(0000) GS:ffff888126111000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8e15c956b8 CR3: 000000005dff0000 CR4: 00000000003526f0
Call Trace:
lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
__raw_spin_lock include/linux/spinlock_api_smp.h:158 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:158
class_raw_spinlock_constructor include/linux/spinlock.h:536 [inline]
pcpu_alloc+0x25b/0x310 lib/debugobjects.c:273
alloc_object+0xbf/0x300 lib/debugobjects.c:475
lookup_object_or_alloc lib/debugobjects.c:702 [inline]
debug_object_activate+0x170/0x3b0 lib/debugobjects.c:875
debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
__call_rcu_common kernel/rcu/tree.c:3144 [inline]
call_rcu+0x43/0x8b0 kernel/rcu/tree.c:3279
__destroy_inode+0x2a1/0x630 fs/inode.c:362
destroy_inode fs/inode.c:385 [inline]
evict+0x8d4/0xb50 fs/inode.c:849
dispose_list fs/inode.c:867 [inline]
evict_inodes+0x7e3/0x870 fs/inode.c:921
generic_shutdown_super+0xaa/0x2d0 fs/super.c:633
romfs_kill_sb+0x27/0xf0 fs/romfs/super.c:579
deactivate_locked_super+0xbc/0x130 fs/super.c:477
cleanup_mnt+0x3d3/0x460 fs/namespace.c:1317
task_work_run+0x1d9/0x270 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
exit_to_user_mode_loop+0x1fa/0x730 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f28ab99e097
Code: a2 c7 05 5c 06 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd19c14338 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000064 RCX: 00007f28ab99e097
RDX: 0000000000000200 RSI: 0000000000000009 RDI: 00007ffd19c154e0
RBP: 00007f28aba322ca R08: 00000000000105a0 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000202 R12: 00007ffd19c154e0
R13: 00007f28aba322ca R14: 00005555838004e8 R15: 00007ffd19c165b0