INFO: task jfsCommit:120 blocked 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:29808 pid:120 tgid:120 ppid:2 task_flags:0x200040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0x1553/0x5240 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7008
io_schedule+0x80/0xe0 kernel/sched/core.c:7835
folio_wait_bit_common+0x6dd/0xbc0 mm/filemap.c:1323
txUnlock+0x240/0xdc0 fs/jfs/jfs_txnmgr.c:930
txLazyCommit fs/jfs/jfs_txnmgr.c:2683 [inline]
jfs_lazycommit+0x52c/0xa10 fs/jfs/jfs_txnmgr.c:2734
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
INFO: task syz-executor:5795 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:22320 pid:5795 tgid:5795 ppid:1 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0x1553/0x5240 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7008
io_schedule+0x80/0xe0 kernel/sched/core.c:7835
folio_wait_bit_common+0x6dd/0xbc0 mm/filemap.c:1323
folio_lock include/linux/pagemap.h:1170 [inline]
release_metapage+0x103/0xab0 fs/jfs/jfs_metapage.c:870
discard_metapage fs/jfs/jfs_metapage.h:88 [inline]
__get_metapage+0x9a3/0xde0 fs/jfs/jfs_metapage.c:753
diWrite+0x401/0x1f40 fs/jfs/jfs_imap.c:639
txCommit+0x869/0x5410 fs/jfs/jfs_txnmgr.c:1256
jfs_rmdir+0x577/0x860 fs/jfs/namei.c:418
vfs_rmdir+0x400/0x6f0 fs/namei.c:5338
filename_rmdir+0x292/0x520 fs/namei.c:5393
__do_sys_unlinkat fs/namei.c:5568 [inline]
__se_sys_unlinkat+0x71/0x1a0 fs/namei.c:5561
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd13a4fb8b7
RSP: 002b:00007ffd860fdb78 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007fd13a4fb8b7
RDX: 0000000000000200 RSI: 00007ffd860fed20 RDI: 00000000ffffff9c
RBP: 00007fd13a592050 R08: 0000000000008560 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000207 R12: 00007ffd860fed20
R13: 00007fd13a592050 R14: 0000000000016284 R15: 00007ffd86100ee0
Showing all locks held in the system:
1 lock held by khungtaskd/38:
#0: ffffffff8ddcb980 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8ddcb980 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8ddcb980 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by kworker/u8:3/57:
#0: ffff888019c44138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3251 [inline]
#0: ffff888019c44138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xa52/0x18c0 kernel/workqueue.c:3359
#1: ffffc9000123fc40 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3252 [inline]
#1: ffffc9000123fc40 ((reaper_work).work){+.+.}-{0:0}, at: process_scheduled_works+0xa8d/0x18c0 kernel/workqueue.c:3359
3 locks held by kworker/u8:6/162:
#0: ffff88801d684138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3251 [inline]
#0: ffff88801d684138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0xa52/0x18c0 kernel/workqueue.c:3359
#1: ffffc90003b17c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3252 [inline]
#1: ffffc90003b17c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa8d/0x18c0 kernel/workqueue.c:3359
#2: ffff8880255c4408 (&wb->work_lock){+.+.}-{3:3}, at: spin_lock_irq include/linux/spinlock_rt.h:96 [inline]
#2: ffff8880255c4408 (&wb->work_lock){+.+.}-{3:3}, at: get_next_work_item fs/fs-writeback.c:2277 [inline]
#2: ffff8880255c4408 (&wb->work_lock){+.+.}-{3:3}, at: wb_do_writeback fs/fs-writeback.c:2372 [inline]
#2: ffff8880255c4408 (&wb->work_lock){+.+.}-{3:3}, at: wb_workfn+0x27b/0xf60 fs/fs-writeback.c:2414
2 locks held by kworker/u8:8/191:
#0: ffff888019c44138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3251 [inline]
#0: ffff888019c44138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xa52/0x18c0 kernel/workqueue.c:3359
#1: ffffc90003b07c40 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3252 [inline]
#1: ffffc90003b07c40 (connector_reaper_work){+.+.}-{0:0}, at: process_scheduled_works+0xa8d/0x18c0 kernel/workqueue.c:3359
3 locks held by kworker/u8:9/1209:
#0: ffff88801d684138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3251 [inline]
#0: ffff88801d684138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0xa52/0x18c0 kernel/workqueue.c:3359
#1: ffffc9000522fc40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3252 [inline]
#1: ffffc9000522fc40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa8d/0x18c0 kernel/workqueue.c:3359
#2: ffff8880643420d0 (&type->s_umount_key#69){++++}-{4:4}, at: super_trylock_shared+0x20/0xf0 fs/super.c:565
2 locks held by getty/5549:
#0: ffff888036ece0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90003e8b2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x462/0x13c0 drivers/tty/n_tty.c:2211
5 locks held by syz-executor/5795:
#0: ffff888064342480 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493
#1: ffff888040116738 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1073 [inline]
#1: ffff888040116738 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2923 [inline]
#1: ffff888040116738 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2934 [inline]
#1: ffff888040116738 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: filename_rmdir+0x1cd/0x520 fs/namei.c:5386
#2: ffff888040115d78 (&type->i_mutex_dir_key#14){++++}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline]
#2: ffff888040115d78 (&type->i_mutex_dir_key#14){++++}-{4:4}, at: vfs_rmdir+0x109/0x6f0 fs/namei.c:5323
#3: ffff888040116368 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_rmdir+0x24a/0x860 fs/jfs/namei.c:366
#4: ffff8880401159a8 (&jfs_ip->commit_mutex/1){+.+.}-{4:4}, at: jfs_rmdir+0x268/0x860 fs/jfs/namei.c:367
1 lock held by udevd/5862:
6 locks held by kworker/0:7/5883:
1 lock held by udevd/5931:
2 locks held by syz-executor/6290:
#0: ffff88805da440d0 (&type->s_umount_key#54){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88805da440d0 (&type->s_umount_key#54){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
#0: ffff88805da440d0 (&type->s_umount_key#54){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:508
#1: ffff88803f3a6088 (&ailp->ail_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:45 [inline]
#1: ffff88803f3a6088 (&ailp->ail_lock){+.+.}-{3:3}, at: xfs_ail_push_all_sync+0x1e1/0x2b0 fs/xfs/xfs_trans_ail.c:722
5 locks held by syz.0.282/8040:
1 lock held by syz.8.284/8043:
#0: ffff88803cb480d0 (&type->s_umount_key#55/1){+.+.}-{4:4}, at: alloc_super+0x28c/0xac0 fs/super.c:345
5 locks held by syz.1.285/8046:
=============================================
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 02/12/2026
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:161 [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:346 [inline]
watchdog+0xfd9/0x1030 kernel/hung_task.c:515
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x51e/0xb90 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: 8044 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:arch_irqs_disabled_flags arch/x86/include/asm/irqflags.h:146 [inline]
RIP: 0010:lockdep_hardirqs_on_prepare+0x53/0x260 kernel/locking/lockdep.c:4391
Code: 00 65 8b 05 8f 65 ae 10 85 c0 0f 85 74 01 00 00 65 8b 05 08 61 ae 10 85 c0 0f 85 65 01 00 00 83 3d 61 73 b9 17 00 75 37 9c 58 00 02 00 00 0f 85 a2 01 00 00 8b 05 4c 73 b9 17 85 c0 75 0d 80
RSP: 0018:ffffc9000e577a00 EFLAGS: 00000046
RAX: 0000000000000046 RBX: ffff888032099640 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8ba666e0 RDI: ffffffff8ba666a0
RBP: 0000000000000000 R08: ffffffff8f6a3bb7 R09: 1ffffffff1ed4776
R10: dffffc0000000000 R11: fffffbfff1ed4777 R12: ffff888032099640
R13: 0000000000000000 R14: 00000000000beb38 R15: 0000000000000282
FS: 0000555577be5500(0000) GS:ffff88812633c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f48f119d400 CR3: 000000004db3e000 CR4: 00000000003526f0
Call Trace:
trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:78
kasan_quarantine_put+0xbb/0x1f0 mm/kasan/quarantine.c:234
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2685 [inline]
slab_free mm/slub.c:6165 [inline]
kfree+0x1c1/0x6c0 mm/slub.c:6483
tomoyo_path_perm+0x403/0x560 security/tomoyo/file.c:847
tomoyo_path_symlink+0xab/0xf0 security/tomoyo/tomoyo.c:212
security_path_symlink+0x16f/0x360 security/security.c:1476
filename_symlinkat+0x134/0x420 fs/namei.c:5638
__do_sys_symlinkat fs/namei.c:5660 [inline]
__se_sys_symlinkat+0x4e/0x2b0 fs/namei.c:5655
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f48f118b857
Code: 44 00 00 48 89 f2 31 c9 48 89 fe bf 9c ff ff ff e9 8e f5 ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 b8 0a 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffca910ec68 EFLAGS: 00000202 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f48f118b857
RDX: 00007f48f1223c52 RSI: 00000000ffffff9c RDI: 00007ffca910ed00
RBP: 00007ffca910ecac R08: 0000000000000001 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000016
R13: 0000555577bf89f0 R14: 000000000003888e R15: 00007ffca910ed00