INFO: task jfsCommit:276 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:26696 pid: 276 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11bb/0x4390 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
io_schedule+0x7c/0xd0 kernel/sched/core.c:8503
__lock_metapage+0x1a9/0x380 fs/jfs/jfs_metapage.c:49
lock_metapage fs/jfs/jfs_metapage.c:63 [inline]
__get_metapage+0x43e/0x1060 fs/jfs/jfs_metapage.c:640
diIAGRead+0xce/0x140 fs/jfs/jfs_imap.c:2672
diFree+0x898/0x2460 fs/jfs/jfs_imap.c:959
jfs_evict_inode+0x327/0x430 fs/jfs/inode.c:162
evict+0x485/0x870 fs/inode.c:647
txLazyCommit fs/jfs/jfs_txnmgr.c:2699 [inline]
jfs_lazycommit+0x437/0xb20 fs/jfs/jfs_txnmgr.c:2767
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c11c720 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by jfsCommit/276:
#0: ffff8880763d8920 (&(imap->im_aglock[index])){+.+.}-{3:3}, at: diFree+0x2a4/0x2460 fs/jfs/jfs_imap.c:889
#1: ffff8880743c2f78 (&jfs_ip->rdwrlock/1){.+.+}-{3:3}, at: diFree+0x2c2/0x2460 fs/jfs/jfs_imap.c:894
2 locks held by jfsCommit/277:
#0: ffff88807a200920 (&(imap->im_aglock[index])){+.+.}-{3:3}, at: diFree+0x2a4/0x2460 fs/jfs/jfs_imap.c:889
#1: ffff88806044f038 (&jfs_ip->rdwrlock/1){.+.+}-{3:3}, at: diFree+0x2c2/0x2460 fs/jfs/jfs_imap.c:894
1 lock held by udevd/3560:
2 locks held by getty/3945:
#0: ffff88802ce33098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900025e62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ba/0x1a30 drivers/tty/n_tty.c:2158
2 locks held by syz-executor/4181:
#0: ffff88807a62c0e0 (&type->s_umount_key#76){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365
#1: ffffffff8c4c3d08 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x520 fs/jfs/jfs_logmgr.c:1452
2 locks held by syz-executor/4182:
#0: ffff88805d6740e0 (&type->s_umount_key#76){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365
#1: ffffffff8c4c3d08 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x520 fs/jfs/jfs_logmgr.c:1452
1 lock held by udevd/4363:
3 locks held by kworker/u4:9/4612:
2 locks held by udevd/4819:
2 locks held by kworker/u4:13/4926:
#0: ffff8880189a0138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc9000343fd00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
2 locks held by kworker/0:11/5054:
1 lock held by syz.3.262/5382:
#0: ffff88807a62c0e0 (&type->s_umount_key#76){++++}-{3:3}, at: iterate_supers+0xa4/0x1d0 fs/super.c:716
1 lock held by syz-executor/5666:
#0: ffff8880630160e0 (&type->s_umount_key#76){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365
2 locks held by syz.6.460/6290:
#0: ffff888073ca80e0 (&type->s_umount_key#76){++++}-{3:3}, at: do_remount fs/namespace.c:2694 [inline]
#0: ffff888073ca80e0 (&type->s_umount_key#76){++++}-{3:3}, at: path_mount+0xcf8/0x1020 fs/namespace.c:3356
#1: ffff888020de07d8 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline]
#1: ffff888020de07d8 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x197/0x920 fs/fs-writeback.c:2779
2 locks held by kworker/1:14/6346:
#0: ffff888016872138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc9000303fd00 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
1 lock held by syz-executor/6773:
#0: ffffffff8c1211a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#0: ffffffff8c1211a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x347/0x6b0 kernel/rcu/tree_exp.h:845
2 locks held by kworker/u4:15/7120:
1 lock held by syz.1.688/7304:
#0: ffff88807a62c0e0 (&type->s_umount_key#76){++++}-{3:3}, at: user_get_super+0x118/0x240 fs/super.c:850
5 locks held by kworker/1:21/7454:
#0: ffff88801bc24538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc9000319fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2: ffff888147f75220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:764 [inline]
#2: ffff888147f75220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1a7/0x5560 drivers/usb/core/hub.c:5827
#3: ffff8880772f5220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:764 [inline]
#3: ffff8880772f5220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x85/0x460 drivers/base/dd.c:954
#4: ffff888059a041a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:764 [inline]
#4: ffff888059a041a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x85/0x460 drivers/base/dd.c:954
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
nmi_cpu_backtrace+0x397/0x3d0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xe0f/0xe50 kernel/hung_task.c:369
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4401 Comm: udevd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:arch_stack_walk+0xf7/0x140 arch/x86/kernel/stacktrace.c:27
Code: ff ff 4c 89 e6 4c 89 fa e8 36 45 08 00 83 bd 78 ff ff ff 00 74 32 4c 8d bd 78 ff ff ff 4c 89 ff e8 4e 25 08 00 48 85 c0 74 1e <48> 89 df 48 89 c6 41 ff d6 84 c0 74 11 4c 89 ff e8 54 26 08 00 83
RSP: 0018:ffffc900034fefa8 EFLAGS: 00000282
RAX: ffffffff81b2a3c7 RBX: ffffc900034ff060 RCX: 0000000080000001
RDX: ffffc900034fef01 RSI: ffffc900034ff270 RDI: ffffffff81b2a3c7
RBP: ffffc900034ff030 R08: dffffc0000000000 R09: ffffc900034feff8
R10: fffff5200069fe01 R11: 1ffff9200069fdff R12: ffff88802c0f3b80
R13: 1ffff9200069fe20 R14: ffffffff81667ac0 R15: ffffc900034fefa8
FS: 00007f84e74ab880(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f84e73037e0 CR3: 0000000075fd9000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
save_stack+0xf3/0x1e0 mm/page_owner.c:119
__set_page_owner+0x41/0x2d0 mm/page_owner.c:181
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x1b77/0x1c60 mm/page_alloc.c:4192
__alloc_pages+0x1e1/0x470 mm/page_alloc.c:5487
alloc_pages_vma+0x393/0x7c0 mm/mempolicy.c:2146
shmem_alloc_page mm/shmem.c:1586 [inline]
shmem_alloc_and_acct_page+0x427/0xb70 mm/shmem.c:1611
shmem_getpage_gfp+0x14f4/0x2d40 mm/shmem.c:1906
shmem_getpage mm/shmem.c:151 [inline]
shmem_write_begin+0xcd/0x1a0 mm/shmem.c:2474
generic_perform_write+0x2aa/0x530 mm/filemap.c:3785
__generic_file_write_iter+0x25f/0x4e0 mm/filemap.c:3912
generic_file_write_iter+0xa6/0x1b0 mm/filemap.c:3944
call_write_iter include/linux/fs.h:2173 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0x712/0xd00 fs/read_write.c:594
ksys_write+0x14d/0x250 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f84e7599407
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:00007ffccd4f7750 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f84e74ab880 RCX: 00007f84e7599407
RDX: 0000000000000137 RSI: 000055aae0b57ed0 RDI: 0000000000000008
RBP: 000055aae0b57ed0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000137
R13: 000055aae09d3280 R14: 00007f84e76e1ea0 R15: 000055aae09db680