INFO: task jfsCommit:129 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:28600 pid:129 tgid:129 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:
2 locks held by kworker/u8:0/12:
2 locks held by ktimers/1/29:
1 lock held by khungtaskd/38:
#0: ffffffff8e1c3000 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8e1c3000 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffffffff8e1c3000 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
6 locks held by kworker/u8:3/56:
2 locks held by kworker/u8:4/66:
#0: ffff88813ff5c138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
#0: ffff88813ff5c138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
#1: ffffc9000151fc40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
#1: ffffc9000151fc40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
2 locks held by jfsCommit/128:
#0: ffff88802a928900 (&(imap->im_aglock[index])){+.+.}-{4:4}, at: diFree+0x2da/0x2cc0 fs/jfs/jfs_imap.c:889
#1: ffff888066dd31b0 (&jfs_ip->rdwrlock/1){++++}-{4:4}, at: diFree+0x2f8/0x2cc0 fs/jfs/jfs_imap.c:894
2 locks held by jfsCommit/129:
#0: ffff888035e28900 (&(imap->im_aglock[index])){+.+.}-{4:4}, at: diFree+0x2da/0x2cc0 fs/jfs/jfs_imap.c:889
#1: ffff888061d5e1f8 (&jfs_ip->rdwrlock/1){++++}-{4:4}, at: diFree+0x2f8/0x2cc0 fs/jfs/jfs_imap.c:894
5 locks held by kworker/u8:6/150:
3 locks held by kworker/u8:8/1025:
#0: ffff888032748938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
#0: ffff888032748938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
#1: ffffc90005cdfc40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
#1: ffffc90005cdfc40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
#2: ffffffff8f5b0578 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#2: ffffffff8f5b0578 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x123/0x16e0 net/ipv6/addrconf.c:4229
4 locks held by kworker/u8:14/3371:
2 locks held by getty/5358:
#0: ffff888035ac30a0 (&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
2 locks held by syz-executor/11306:
#0: ffff8880354c80d0 (&type->s_umount_key#97){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880354c80d0 (&type->s_umount_key#97){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
#0: ffff8880354c80d0 (&type->s_umount_key#97){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:509
#1: ffffffff8e65b958 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xad/0x530 fs/jfs/jfs_logmgr.c:1441
2 locks held by syz-executor/11368:
#0: ffff88803609a0d0 (&type->s_umount_key#97){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88803609a0d0 (&type->s_umount_key#97){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
#0: ffff88803609a0d0 (&type->s_umount_key#97){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:509
#1: ffffffff8e65b958 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xad/0x530 fs/jfs/jfs_logmgr.c:1441
2 locks held by syz-executor/11603:
#0: ffff888036b1c0d0 (&type->s_umount_key#97){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888036b1c0d0 (&type->s_umount_key#97){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
#0: ffff888036b1c0d0 (&type->s_umount_key#97){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:509
#1: ffffffff8e65b958 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xad/0x530 fs/jfs/jfs_logmgr.c:1441
2 locks held by syz-executor/13175:
#0: ffff888064e780d0 (&type->s_umount_key#97){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888064e780d0 (&type->s_umount_key#97){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
#0: ffff888064e780d0 (&type->s_umount_key#97){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:509
#1: ffffffff8e65b958 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xad/0x530 fs/jfs/jfs_logmgr.c:1441
2 locks held by syz-executor/13178:
#0: ffff88806c1100d0 (&type->s_umount_key#97){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88806c1100d0 (&type->s_umount_key#97){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
#0: ffff88806c1100d0 (&type->s_umount_key#97){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:509
#1: ffffffff8e65b958 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xad/0x530 fs/jfs/jfs_logmgr.c:1441
1 lock held by syz-executor/13277:
#0: ffff88803c0960d0 (&type->s_umount_key#97){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88803c0960d0 (&type->s_umount_key#97){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
#0: ffff88803c0960d0 (&type->s_umount_key#97){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:509
1 lock held by syz-executor/13481:
#0: ffff88802a2fa0d0 (&type->s_umount_key#97){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88802a2fa0d0 (&type->s_umount_key#97){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
#0: ffff88802a2fa0d0 (&type->s_umount_key#97){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:509
8 locks held by syz-executor/14724:
1 lock held by syz.6.846/14734:
3 locks held by syz.6.846/14772:
2 locks held by modprobe/14769:
2 locks held by rm/14771:
=============================================
NMI backtrace for cpu 0
CPU: 0 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 14734 Comm: syz.6.846 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:lock_acquire+0x0/0x350 kernel/locking/lockdep.c:5828
Code: 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa b0 01 c3 cc cc cc cc cc 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 60 4d 89 ce 45
RSP: 0000:ffffc9000438f3f0 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffffff823c8fe4 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e1c3000
RBP: 1ffff92000871e9c R08: 0000000000000000 R09: 0000000000000000
R10: ffffc9000438f4f8 R11: ffffffff81b02320 R12: dffffc0000000000
R13: ffffffff8176e1ff R14: ffffc9000438f4a8 R15: 1ffff92000871e95
FS: 00007f83fa4f66c0(0000) GS:ffff888125d4c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fde4d7b1e9c CR3: 0000000057202000 CR4: 00000000003526f0
Call Trace:
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:840 [inline]
class_rcu_constructor include/linux/rcupdate.h:1183 [inline]
unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
kasan_kmalloc include/linux/kasan.h:263 [inline]
__do_kmalloc_node mm/slub.c:5362 [inline]
__kmalloc_noprof+0x41a/0x780 mm/slub.c:5387
_kmalloc_noprof include/linux/slab.h:973 [inline]
_kzalloc_noprof include/linux/slab.h:1290 [inline]
copy_splice_read+0x16f/0xab0 fs/splice.c:336
do_splice_read fs/splice.c:979 [inline]
splice_direct_to_actor+0x4c1/0xcc0 fs/splice.c:1084
do_splice_direct_actor fs/splice.c:1202 [inline]
do_splice_direct+0x19b/0x2a0 fs/splice.c:1228
do_sendfile+0x540/0x7e0 fs/read_write.c:1371
__do_sys_sendfile64 fs/read_write.c:1432 [inline]
__se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1418
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: 0033:0x7f83fc29de59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f83fa4f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f83fc525fa0 RCX: 00007f83fc29de59
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 00007f83fc333e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020fffe82 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f83fc526038 R14: 00007f83fc525fa0 R15: 00007ffd98b4cfe8