INFO: task jfsCommit:128 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:jfsCommit state:D stack:27096 pid:128 tgid:128 ppid:2 task_flags:0x200040 flags:0x00080000
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x16ec/0x5620 kernel/sched/core.c:7189
__schedule_loop kernel/sched/core.c:7268 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7283
io_schedule+0x7f/0xd0 kernel/sched/core.c:8110
__lock_metapage fs/jfs/jfs_metapage.c:52 [inline]
lock_metapage+0x1ff/0x400 fs/jfs/jfs_metapage.c:66
__get_metapage+0x49a/0xe20 fs/jfs/jfs_metapage.c:749
diIAGRead+0xce/0x140 fs/jfs/jfs_imap.c:2672
diFree+0x9dd/0x2ca0 fs/jfs/jfs_imap.c:959
jfs_evict_inode+0x331/0x440 fs/jfs/inode.c:162
evict+0x61e/0xb10 fs/inode.c:841
txLazyCommit fs/jfs/jfs_txnmgr.c:2666 [inline]
jfs_lazycommit+0x3ef/0xa10 fs/jfs/jfs_txnmgr.c:2735
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
INFO: task syz-executor:5605 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20960 pid:5605 tgid:5605 ppid:1 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x16ec/0x5620 kernel/sched/core.c:7189
__schedule_loop kernel/sched/core.c:7268 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7283
jfs_flush_journal+0x721/0xf50 fs/jfs/jfs_logmgr.c:1561
jfs_umount+0x171/0x3d0 fs/jfs/jfs_umount.c:59
jfs_put_super+0x8c/0x190 fs/jfs/super.c:194
generic_shutdown_super+0x13d/0x2d0 fs/super.c:646
kill_block_super+0x44/0x90 fs/super.c:1725
deactivate_locked_super+0xbc/0x130 fs/super.c:476
cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
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:67 [inline]
exit_to_user_mode_loop+0x193/0x680 kernel/entry/common.c:98
__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: 0033:0x7f9fba97e097
RSP: 002b:00007ffc11d44e78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f9fbaa121ca RCX: 00007f9fba97e097
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc11d44f30
RBP: 00007ffc11d44f30 R08: 00007ffc11d45f30 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc11d45fc0
R13: 00007f9fbaa121ca R14: 0000000000037832 R15: 00007ffc11d46000
Showing all locks held in the system:
1 lock held by khungtaskd/37:
#0: ffffffff8dfc8100 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8dfc8100 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8dfc8100 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
5 locks held by kworker/u8:2/43:
2 locks held by jfsCommit/128:
#0: ffff88803a400900 (&(imap->im_aglock[index])){+.+.}-{4:4}, at: diFree+0x2e8/0x2ca0 fs/jfs/jfs_imap.c:889
#1: ffff8880619414b8 (&jfs_ip->rdwrlock/1){.+.+}-{4:4}, at: diFree+0x306/0x2ca0 fs/jfs/jfs_imap.c:894
13 locks held by kworker/u8:9/1033:
3 locks held by kworker/u8:12/1501:
#0: ffff88801a074138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline]
#0: ffff88801a074138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860 kernel/workqueue.c:3397
#1: ffffc90006c1fc40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3290 [inline]
#1: ffffc90006c1fc40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860 kernel/workqueue.c:3397
#2: ffffffff8f350538 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:313
1 lock held by udevd/4968:
2 locks held by getty/5355:
#0: ffff888036b7c0a0 (&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+0x462/0x13a0 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5605:
#0: ffff8880351980d0 (&type->s_umount_key#62){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880351980d0 (&type->s_umount_key#62){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
#0: ffff8880351980d0 (&type->s_umount_key#62){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:508
3 locks held by kworker/u9:4/5615:
#0: ffff8880212bb138 ((wq_completion)hci3){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline]
#0: ffff8880212bb138 ((wq_completion)hci3){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860 kernel/workqueue.c:3397
#1: ffffc90004a97c40 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3290 [inline]
#1: ffffc90004a97c40 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860 kernel/workqueue.c:3397
#2: ffff88803b844f80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_open net/bluetooth/hci_core.c:429 [inline]
#2: ffff88803b844f80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_power_on+0x1ac/0x710 net/bluetooth/hci_core.c:923
2 locks held by syz-executor/7573:
1 lock held by syz.7.223/7658:
#0: ffff8880351980d0 (&type->s_umount_key#62){++++}-{4:4}, at: __super_lock fs/super.c:60 [inline]
#0: ffff8880351980d0 (&type->s_umount_key#62){++++}-{4:4}, at: super_lock+0x2d6/0x3d0 fs/super.c:122
5 locks held by syz-executor/7738:
1 lock held by udevd/8013:
#0: ffff888037ace480 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493
2 locks held by udevd/8115:
#0: ffff888037ace480 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493
#1: ffff88803a4ab7d0 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1074 [inline]
#1: ffff88803a4ab7d0 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2914 [inline]
#1: ffff88803a4ab7d0 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2938 [inline]
#1: ffff88803a4ab7d0 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: filename_rmdir+0x1cd/0x520 fs/namei.c:5424
8 locks held by syz.9.296/8499:
2 locks held by syz.9.296/8520:
#0: ffff888038664480 (sb_writers#22){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493
#1: ffff8880619d9c40 (&type->i_mutex_dir_key#17){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#1: ffff8880619d9c40 (&type->i_mutex_dir_key#17){++++}-{4:4}, at: open_last_lookups fs/namei.c:4608 [inline]
#1: ffff8880619d9c40 (&type->i_mutex_dir_key#17){++++}-{4:4}, at: path_openat+0xb5e/0x38a0 fs/namei.c:4855
2 locks held by syz.9.296/8523:
#0: ffff888038664480 (sb_writers#22){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493
#1: ffff8880619d9c40 (&type->i_mutex_dir_key#17){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#1: ffff8880619d9c40 (&type->i_mutex_dir_key#17){++++}-{4:4}, at: open_last_lookups fs/namei.c:4608 [inline]
#1: ffff8880619d9c40 (&type->i_mutex_dir_key#17){++++}-{4:4}, at: path_openat+0xb5e/0x38a0 fs/namei.c:4855
6 locks held by syz-executor/8532:
3 locks held by dhcpcd-run-hook/8531:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 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:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
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+0xfd3/0x1030 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 4968 Comm: udevd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:alloc_from_pcs mm/slub.c:4749 [inline]
RIP: 0010:slab_alloc_node mm/slub.c:4884 [inline]
RIP: 0010:__do_kmalloc_node mm/slub.c:5295 [inline]
RIP: 0010:__kmalloc_node_track_caller_noprof+0x44c/0x7e0 mm/slub.c:5408
Code: 8b 3c 24 e8 46 62 fb 08 89 c3 83 f8 08 0f 83 bb 02 00 00 48 8b 04 dd 90 97 8a 8d 4a 8d 34 38 4a 8b 84 38 80 00 00 00 8b 48 18 <85> c9 0f 84 ad 01 00 00 ff c9 48 8b 7c c8 20 80 7c 24 10 00 0f 84
RSP: 0018:ffffc90003fb77e8 EFLAGS: 00000297
RAX: ffff88805f3f9380 RBX: 0000000000000001 RCX: 0000000000000003
RDX: 000000009da0a0f5 RSI: ffff8880b8940828 RDI: ffffffff8ba75c80
RBP: 0000000000082820 R08: ffffffff8b1e01ac R09: ffffffff8dfc8100
R10: dffffc0000000000 R11: fffffbfff1f10dff R12: ffff88801a00a000
R13: 00000000ffffffff R14: 0000000000000800 R15: ffffffff926b9828
FS: 00007fac9b8cc880(0000) GS:ffff888126287000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7c36f5f156 CR3: 00000000392e6000 CR4: 00000000003526f0
Call Trace:
kmalloc_reserve net/core/skbuff.c:635 [inline]
__alloc_skb+0x2c1/0x7d0 net/core/skbuff.c:713
alloc_skb include/linux/skbuff.h:1385 [inline]
nlmsg_new include/net/netlink.h:1055 [inline]
audit_buffer_alloc kernel/audit.c:1845 [inline]
audit_log_start+0x419/0xa40 kernel/audit.c:1964
common_lsm_audit+0xb9/0x300 security/lsm_audit.c:442
smack_log+0x39a/0x3f0 security/smack/smack_access.c:391
smk_tskacc+0x311/0x3a0 security/smack/smack_access.c:255
smack_file_lock+0x1e4/0x280 security/smack/smack_lsm.c:1780
security_file_lock+0x8d/0x260 security/security.c:2652
__do_sys_flock fs/locks.c:2245 [inline]
__se_sys_flock+0x37a/0x660 fs/locks.c:2214
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fac9ba24aa7
Code: f3 0f 6f 44 24 58 f3 0f 6f 4c 24 68 48 89 03 48 8b 44 24 08 0f 11 43 10 48 89 43 08 0f 11 4b 20 eb a7 90 b8 49 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 21 f3 0d 00 f7 d8 64 89 01 48
RSP: 002b:00007ffc5d175288 EFLAGS: 00000206 ORIG_RAX: 0000000000000049
RAX: ffffffffffffffda RBX: 0000557e5595d8d0 RCX: 00007fac9ba24aa7
RDX: 000000000000000c RSI: 0000000000000006 RDI: 000000000000000c
RBP: 0000557e55960c60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000000c
R13: 0000557e3023f100 R14: 0000000000000000 R15: 00007ffc5d175480