INFO: task syz-executor:5850 blocked for more than 143 seconds.
Not tainted 6.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:17736 pid:5850 tgid:5850 ppid:1 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16aa/0x4c90 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6879
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6936
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x724/0xe80 kernel/locking/mutex.c:747
lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
jfs_umount+0x2ef/0x3c0 fs/jfs/jfs_umount.c:114
jfs_put_super+0x8c/0x190 fs/jfs/super.c:194
generic_shutdown_super+0x132/0x2c0 fs/super.c:643
kill_block_super+0x44/0x90 fs/super.c:1755
deactivate_locked_super+0xbc/0x130 fs/super.c:474
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1417
task_work_run+0x1d1/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:114
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe71198fcd7
RSP: 002b:00007ffc9a3cf548 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fe711a10b55 RCX: 00007fe71198fcd7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc9a3cf600
RBP: 00007ffc9a3cf600 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc9a3d0690
R13: 00007fe711a10b55 R14: 000000000002f978 R15: 00007ffc9a3d06d0
INFO: task syz-executor:6666 blocked for more than 144 seconds.
Not tainted 6.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:18856 pid:6666 tgid:6666 ppid:1 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16aa/0x4c90 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6879
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6936
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x724/0xe80 kernel/locking/mutex.c:747
lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
jfs_umount+0x2ef/0x3c0 fs/jfs/jfs_umount.c:114
jfs_put_super+0x8c/0x190 fs/jfs/super.c:194
generic_shutdown_super+0x132/0x2c0 fs/super.c:643
kill_block_super+0x44/0x90 fs/super.c:1755
deactivate_locked_super+0xbc/0x130 fs/super.c:474
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1417
task_work_run+0x1d1/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:114
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f444a98fcd7
RSP: 002b:00007ffc9a15d268 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f444aa10b55 RCX: 00007f444a98fcd7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc9a15d320
RBP: 00007ffc9a15d320 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc9a15e3b0
R13: 00007f444aa10b55 R14: 000000000002f235 R15: 00007ffc9a15e3f0
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffffffff8e144bf8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline]
#0: ffffffff8e144bf8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730 kernel/rcu/tree_exp.h:998
1 lock held by khungtaskd/31:
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
2 locks held by kworker/u8:5/1002:
3 locks held by kworker/u8:9/1169:
#0: ffff88814c4d4148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88814c4d4148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321
#1: ffffc900041dfbc0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc900041dfbc0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321
#2: ffffffff8f509f08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#2: ffffffff8f509f08 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x112/0x14b0 net/ipv6/addrconf.c:4193
2 locks held by getty/5598:
#0: ffff888035bb90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
2 locks held by syz-executor/5836:
#0: ffff88805572a0e0 (&type->s_umount_key#93){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff88805572a0e0 (&type->s_umount_key#93){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff88805572a0e0 (&type->s_umount_key#93){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffffffff8e56fc28 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/5850:
#0: ffff888076e100e0 (&type->s_umount_key#93){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff888076e100e0 (&type->s_umount_key#93){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff888076e100e0 (&type->s_umount_key#93){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffffffff8e56fc28 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/6666:
#0: ffff8880453160e0 (&type->s_umount_key#93){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff8880453160e0 (&type->s_umount_key#93){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff8880453160e0 (&type->s_umount_key#93){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffffffff8e56fc28 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/6872:
#0: ffff88802a33e0e0 (&type->s_umount_key#93){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff88802a33e0e0 (&type->s_umount_key#93){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff88802a33e0e0 (&type->s_umount_key#93){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffffffff8e56fc28 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/7663:
#0: ffff88808edf00e0 (&type->s_umount_key#93){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff88808edf00e0 (&type->s_umount_key#93){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff88808edf00e0 (&type->s_umount_key#93){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffffffff8e56fc28 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/7678:
#0: ffff88807acd20e0 (&type->s_umount_key#93){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff88807acd20e0 (&type->s_umount_key#93){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff88807acd20e0 (&type->s_umount_key#93){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffffffff8e56fc28 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/7809:
#0: ffffffff8e87d008 (bio_slab_lock){+.+.}-{4:4}, at: bio_put_slab block/bio.c:140 [inline]
#0: ffffffff8e87d008 (bio_slab_lock){+.+.}-{4:4}, at: bioset_exit+0x44a/0x690 block/bio.c:1758
#1: ffffffff8e144ac0 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x570 kernel/rcu/tree.c:3786
2 locks held by syz-executor/7839:
#0: ffff88802ad700e0 (&type->s_umount_key#93){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff88802ad700e0 (&type->s_umount_key#93){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff88802ad700e0 (&type->s_umount_key#93){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffffffff8e56fc28 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
1 lock held by syz.1.324/8718:
#0: ffff88805572a0e0 (&type->s_umount_key#93){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff88805572a0e0 (&type->s_umount_key#93){++++}-{4:4}, at: super_lock+0x25c/0x3b0 fs/super.c:121
3 locks held by syz-executor/9162:
#0: ffffffff8f509f08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#0: ffffffff8f509f08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
#0: ffffffff8f509f08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8db/0x1c70 net/core/rtnetlink.c:4054
#1: ffff88807c6f94e8 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_open+0x227/0x420 drivers/net/wireguard/device.c:50
#2: ffffffff8e144bf8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline]
#2: ffffffff8e144bf8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730 kernel/rcu/tree_exp.h:998
1 lock held by syz.5.425/9487:
1 lock held by syz.5.425/9491:
#0: ffff8880757c8068 (&ima_iint_mutex_key[depth]){+.+.}-{4:4}, at: ima_check_last_writer security/integrity/ima/ima_main.c:172 [inline]
#0: ffff8880757c8068 (&ima_iint_mutex_key[depth]){+.+.}-{4:4}, at: ima_file_free+0x16c/0x460 security/integrity/ima/ima_main.c:213
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0xfee/0x1030 kernel/hung_task.c:470
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
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: 9487 Comm: syz.5.425 Not tainted 6.16.0-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:arch_irqs_disabled_flags arch/x86/include/asm/irqflags.h:146 [inline]
RIP: 0010:check_preemption_disabled+0x5c/0x120 lib/smp_processor_id.c:19
Code: ed 35 07 48 3b 4c 24 08 0f 85 cc 00 00 00 48 83 c4 10 5b 41 5e 41 5f 5d c3 cc cc cc cc cc 48 c7 04 24 00 00 00 00 9c 8f 04 24 04 24 00 02 00 00 74 c8 65 4c 8b 3c 25 08 90 9c 92 41 f6 47 2f
RSP: 0018:ffffc9000511ecf0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffffff81aec5c8 RCX: 0000000080000000
RDX: ffffc90027e02000 RSI: ffffffff8d9d3d8c RDI: ffffffff8be1ba40
RBP: ffffc9000511ee08 R08: ffffffff8de11247 R09: 1ffffffff1bc2248
R10: dffffc0000000000 R11: fffffbfff1bc2249 R12: 0000000000000200
R13: 1ffff92000a23dd4 R14: 1ffff92000a23dac R15: dffffc0000000000
FS: 00007ff6471186c0(0000) GS:ffff888125c57000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32f01ff8 CR3: 0000000099a82000 CR4: 00000000003526f0
Call Trace:
lockdep_hardirqs_off+0xab/0x110 kernel/locking/lockdep.c:4498
trace_hardirqs_off+0x12/0x40 kernel/trace/trace_preemptirq.c:104
seqcount_lockdep_reader_access+0xe8/0x1c0 include/linux/seqlock.h:71
ktime_get_coarse_real_ts64_mg+0x52/0x1e0 kernel/time/timekeeping.c:2307
current_time+0x8e/0x370 fs/inode.c:2253
atime_needs_update+0x320/0x6d0 fs/inode.c:2115
touch_atime+0x82/0x6d0 fs/inode.c:2132
file_accessed include/linux/fs.h:2652 [inline]
shmem_file_read_iter+0x827/0x930 mm/shmem.c:3447
__kernel_read+0x469/0x8c0 fs/read_write.c:530
integrity_kernel_read+0x89/0xd0 security/integrity/iint.c:28
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x85e/0x16f0 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x428/0x8d0 security/integrity/ima/ima_api.c:293
process_measurement+0x1121/0x1a40 security/integrity/ima/ima_main.c:385
ima_file_mmap+0x1a2/0x1f0 security/integrity/ima/ima_main.c:475
security_mmap_file+0x7a4/0xa60 security/security.c:2982
vm_mmap_pgoff+0x12c/0x4c0 mm/util.c:573
ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:607
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff64638e9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff647118038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007ff6465b6080 RCX: 00007ff64638e9a9
RDX: 00000000027ffff7 RSI: 0000000000600000 RDI: 0000200000000000
RBP: 00007ff646410d69 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000004012011 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff6465b6080 R15: 00007ffca5980148