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:27152 pid:128 tgid:128 ppid:2 task_flags:0x200040 flags:0x00080000
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
txLazyCommit fs/jfs/jfs_txnmgr.c:2666 [inline]
jfs_lazycommit+0x3f3/0xa20 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
Showing all locks held in the system:
5 locks held by kworker/u8:0/12:
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 jfsCommit/128:
#0: ffff888060858900 (&(imap->im_aglock[index])){+.+.}-{4:4}, at: diFree+0x2da/0x2cc0 fs/jfs/jfs_imap.c:889
#1: ffff888062606ba0 (&jfs_ip->rdwrlock/1){++++}-{4:4}, at: diFree+0x2f8/0x2cc0 fs/jfs/jfs_imap.c:894
6 locks held by kworker/u8:8/1126:
#0: ffff88801b2a8938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
#0: ffff88801b2a8938 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
#1: ffffc9000609fc40 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
#1: ffffc9000609fc40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
#2: ffffffff8f362b20 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf5/0x810 net/core/net_namespace.c:673
#3: ffff888032a8d160 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1102 [inline]
#3: ffff888032a8d160 (&dev->mutex){....}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:124 [inline]
#3: ffff888032a8d160 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x129/0x420 net/devlink/core.c:557
#4: ffff88806311c310 (&devlink->lock_key#41){+.+.}-{4:4}, at: devl_lock net/devlink/core.c:292 [inline]
#4: ffff88806311c310 (&devlink->lock_key#41){+.+.}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:125 [inline]
#4: ffff88806311c310 (&devlink->lock_key#41){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x142/0x420 net/devlink/core.c:557
#5: ffffffff8f3716b8 (rtnl_mutex){+.+.}-{4:4}, at: nsim_destroy+0x16b/0x800 drivers/net/netdevsim/netdev.c:1189
2 locks held by getty/5354:
#0: ffff8880354610a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90003cbb2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x460/0x1360 drivers/tty/n_tty.c:2211
1 lock held by udevd/9732:
3 locks held by udevd/9735:
2 locks held by syz-executor/11124:
5 locks held by syz.4.565/12056:
#0: ffff88803a0c2500 (sb_writers#16){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494
#1: ffff88803f32dca0 (&type->i_mutex_dir_key#10/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1069 [inline]
#1: ffff88803f32dca0 (&type->i_mutex_dir_key#10/1){+.+.}-{4:4}, at: lock_rename fs/namei.c:3785 [inline]
#1: ffff88803f32dca0 (&type->i_mutex_dir_key#10/1){+.+.}-{4:4}, at: __start_renaming+0x148/0x410 fs/namei.c:3878
#2: ffff888062603600 (&sb->s_type->i_mutex_key#27){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#2: ffff888062603600 (&sb->s_type->i_mutex_key#27){+.+.}-{4:4}, at: lock_two_nondirectories+0xe7/0x180 fs/inode.c:1257
#3: ffff888062606ff0 (&sb->s_type->i_mutex_key#27/4){+.+.}-{4:4}, at: vfs_rename+0x696/0xef0 fs/namei.c:6030
#4: ffff888062606ba0 (&jfs_ip->rdwrlock#3){++++}-{4:4}, at: jfs_rename+0x558/0x1870 fs/jfs/namei.c:1145
8 locks held by syz-executor/12118:
4 locks held by syz-executor/12178:
#0: ffff888035cf4500 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2728 [inline]
#0: ffff888035cf4500 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x231/0xbb0 fs/read_write.c:683
#1: ffff88803af29878 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d9/0x540 fs/kernfs/file.c:336
#2: ffff888028bc0008 (kn->active#52){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline]
#2: ffff888028bc0008 (kn->active#52){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22c/0x540 fs/kernfs/file.c:337
#3: ffffffff8ebe7118 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd6/0x370 drivers/net/netdevsim/bus.c:234
1 lock held by syz-executor/12423:
#0: ffffffff8f3716b8 (rtnl_mutex){+.+.}-{4:4}, at: __tun_chr_ioctl+0x3bf/0x1e10 drivers/net/tun.c:3148
1 lock held by syz.5.622/12498:
#0: ffff88802508a0d0 (&type->s_umount_key#52/1){+.+.}-{4:4}, at: alloc_super fs/super.c:345 [inline]
#0: ffff88802508a0d0 (&type->s_umount_key#52/1){+.+.}-{4:4}, at: sget_fc+0x938/0x1910 fs/super.c:766
1 lock held by sed/12519:
=============================================
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: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: 4b 67 02 c3 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d f3 03 22 00 fb f4 8c cd 03 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffffff8dc07de0 EFLAGS: 00000246
RAX: 0000000000136439 RBX: ffffffff819974b0 RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8d6401ff RDI: ffffffff8ba94380
RBP: ffffffff8dc07eb8 R08: ffff8880b8833d5b R09: 1ffff110171067ab
R10: dffffc0000000000 R11: ffffed10171067ac R12: 0000000000000000
R13: 1ffffffff1b9ede8 R14: 1ffffffff1b80fc4 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff888126111000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2586554000 CR3: 000000005a614000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/kernel/process.c:767 [inline]
default_idle+0x9/0x20 arch/x86/kernel/process.c:768
default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x2e0/0x540 kernel/sched/idle.c:355
cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:454
rest_init+0x2de/0x300 init/main.c:717
start_kernel+0x392/0x3e0 init/main.c:1175
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x137/0x1b0 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x157