INFO: task jfsCommit:275 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jfsCommit state:D stack:26480 pid: 275 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11c3/0x4350 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
io_schedule+0x7c/0xd0 kernel/sched/core.c:8503
__lock_metapage+0x1b8/0x390 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+0x8e1/0x2470 fs/jfs/jfs_imap.c:959
jfs_evict_inode+0x31a/0x430 fs/jfs/inode.c:162
evict+0x4b6/0x8b0 fs/inode.c:647
txLazyCommit fs/jfs/jfs_txnmgr.c:2699 [inline]
jfs_lazycommit+0x445/0xb60 fs/jfs/jfs_txnmgr.c:2767
kthread+0x42e/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
INFO: task jfsCommit:276 blocked for more than 145 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jfsCommit state:D stack:27824 pid: 276 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11c3/0x4350 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
io_schedule+0x7c/0xd0 kernel/sched/core.c:8503
__lock_metapage+0x1b8/0x390 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+0x8e1/0x2470 fs/jfs/jfs_imap.c:959
jfs_evict_inode+0x31a/0x430 fs/jfs/inode.c:162
evict+0x4b6/0x8b0 fs/inode.c:647
txLazyCommit fs/jfs/jfs_txnmgr.c:2699 [inline]
jfs_lazycommit+0x445/0xb60 fs/jfs/jfs_txnmgr.c:2767
kthread+0x42e/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
INFO: task syz-executor:8015 blocked for more than 146 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21840 pid: 8015 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11c3/0x4350 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
jfs_flush_journal+0x6fe/0xe80 fs/jfs/jfs_logmgr.c:1572
jfs_sync_fs+0x79/0xa0 fs/jfs/super.c:690
sync_filesystem+0x1be/0x220 fs/sync.c:66
generic_shutdown_super+0x6b/0x300 fs/super.c:448
kill_block_super+0x7c/0xe0 fs/super.c:1438
deactivate_locked_super+0x93/0xf0 fs/super.c:335
cleanup_mnt+0x426/0x4d0 fs/namespace.c:1148
task_work_run+0x125/0x1a0 kernel/task_work.c:188
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:184
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:217
__syscall_exit_to_user_mode_work kernel/entry/common.c:299 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:310
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f13cebe3797
RSP: 002b:00007fffc6f2cef8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f13cec78f1b RCX: 00007f13cebe3797
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fffc6f2cfb0
RBP: 00007fffc6f2cfb0 R08: 00007fffc6f2dfb0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffc6f2e040
R13: 00007f13cec78f1b R14: 000000000007f738 R15: 00007fffc6f2e080
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8d11efa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by jfsCommit/275:
#0: ffff888076eb8920 (&(imap->im_aglock[index])){+.+.}-{3:3}, at: diFree+0x2e1/0x2470 fs/jfs/jfs_imap.c:889
#1: ffff88805deba638 (&jfs_ip->rdwrlock/1){++++}-{3:3}, at: diFree+0x2ff/0x2470 fs/jfs/jfs_imap.c:894
2 locks held by jfsCommit/276:
#0: ffff88807d6f8920 (&(imap->im_aglock[index])){+.+.}-{3:3}, at: diFree+0x2e1/0x2470 fs/jfs/jfs_imap.c:889
#1: ffff88805dec2f78 (&jfs_ip->rdwrlock/1){++++}-{3:3}, at: diFree+0x2ff/0x2470 fs/jfs/jfs_imap.c:894
3 locks held by kworker/u4:4/1288:
#0: ffff888017879138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc90004c9fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffffffff8e24d5c8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251
1 lock held by dhcpcd/3851:
#0: ffffffff8e24d5c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8e24d5c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x79f/0xf10 net/core/rtnetlink.c:5695
2 locks held by getty/3950:
#0: ffff88814c525098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002cf62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x594/0x1a50 drivers/tty/n_tty.c:2158
2 locks held by kworker/1:5/4249:
#0: ffff8880b8f3a358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x130 kernel/sched/core.c:475
#1: ffff8880b8f27888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x517/0x810 kernel/sched/psi.c:891
5 locks held by kworker/u4:14/4536:
#0: ffff8880179cd938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
#1: ffffc9000318fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
#2: ffffffff8e241690 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x148/0xba0 net/core/net_namespace.c:589
#3: ffffffff8e24d5c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock_unregistering net/core/dev.c:11647 [inline]
#3: ffffffff8e24d5c8 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0x165/0x3c0 net/core/dev.c:11685
#4: ffffffff8d123a28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#4: ffffffff8d123a28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d1/0x750 kernel/rcu/tree_exp.h:845
1 lock held by syz-executor/8015:
#0: ffff88805752c0e0 (&type->s_umount_key#78){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365
2 locks held by syz-executor/9430:
#0: ffff8880520360e0 (&type->s_umount_key#78){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365
#1: ffffffff8d4c8428 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xa9/0x530 fs/jfs/jfs_logmgr.c:1452
2 locks held by syz-executor/9502:
#0: ffff8880745100e0 (&type->s_umount_key#78){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365
#1: ffffffff8d4c8428 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xa9/0x530 fs/jfs/jfs_logmgr.c:1452
1 lock held by syz-executor/9969:
#0: ffff888074bb40e0 (&type->s_umount_key#78){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365
1 lock held by syz-executor/10158:
#0: ffff8880589be0e0 (&type->s_umount_key#78){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365
1 lock held by syz.0.1763/11150:
#0: ffffffff8e24d5c8 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x5ce/0xe30 net/core/dev_ioctl.c:596
=============================================
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 09/16/2026
Call Trace:
dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
nmi_cpu_backtrace+0x3a2/0x3d0 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+0xe1b/0xe60 kernel/hung_task.c:369
kthread+0x42e/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: 9823 Comm: kworker/u4:22 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_acquire+0x156/0x7d40 kernel/locking/lockdep.c:4989
Code: 89 bc 24 c0 00 00 00 48 89 5c 24 20 41 83 fe 01 0f 87 11 01 00 00 44 89 f0 48 8d 5c c7 08 48 89 d8 48 c1 e8 03 42 80 3c 00 00 <74> 17 48 89 df e8 60 73 61 00 48 8b 7c 24 78 49 b8 00 00 00 00 00
RSP: 0018:ffffc900039af820 EFLAGS: 00000046
RAX: 1ffffffff1a23df5 RBX: ffffffff8d11efa8 RCX: 1ffff92000735f28
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8d11efa0
RBP: ffffc900039afa68 R08: dffffc0000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1cd6506 R12: 0000000000000000
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fee273f62f8 CR3: 0000000063076000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x19f/0x400 kernel/locking/lockdep.c:5737
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:313
rcu_read_lock include/linux/rcupdate.h:740 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0xc9/0x5c0 net/batman-adv/network-coding.c:723
process_one_work+0x867/0xff0 kernel/workqueue.c:2310
worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
kthread+0x42e/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287