INFO: task syz-executor:5833 blocked for more than 143 seconds.
Not tainted 6.15.0-rc3-syzkaller-00001-g9d7a0577c9db #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20520 pid:5833 tgid:5833 ppid:1 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b33/0x51f0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
rwsem_down_write_slowpath+0xedd/0x1420 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1da/0x220 kernel/locking/rwsem.c:1578
__super_lock fs/super.c:56 [inline]
__super_lock_excl fs/super.c:71 [inline]
deactivate_super+0xb5/0xf0 fs/super.c:505
cleanup_mnt+0x422/0x4c0 fs/namespace.c:1435
task_work_run+0x251/0x310 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x210 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f39a8f8f497
RSP: 002b:00007ffdbeb70db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f39a9010854 RCX: 00007f39a8f8f497
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdbeb70e70
RBP: 00007ffdbeb70e70 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffdbeb71f00
R13: 00007f39a9010854 R14: 00000000000232ab R15: 00007ffdbeb71f40
INFO: task syz.3.145:6924 blocked for more than 144 seconds.
Not tainted 6.15.0-rc3-syzkaller-00001-g9d7a0577c9db #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.145 state:D stack:13936 pid:6924 tgid:6923 ppid:5844 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b33/0x51f0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
jfs_flush_journal+0x73a/0xed0 fs/jfs/jfs_logmgr.c:1564
jfs_sync_fs+0x80/0xa0 fs/jfs/super.c:649
iterate_supers+0xc6/0x190 fs/super.c:934
ksys_sync+0xe0/0x1d0 fs/sync.c:104
__do_sys_sync+0xe/0x20 fs/sync.c:113
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5c08f8e169
RSP: 002b:00007f5c09e3a038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f5c091b5fa0 RCX: 00007f5c08f8e169
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f5c091b5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5c091b5fa0 R15: 00007ffc34b74148
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
1 lock held by khungtaskd/31:
#0: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 kernel/locking/lockdep.c:6764
2 locks held by kworker/u8:11/2997:
#0: ffff8880b8639998 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:605
#1: ffff8880b8623b08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41f/0x7a0 kernel/sched/psi.c:987
2 locks held by getty/5592:
#0: ffff888031a540a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900036d62f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/5833:
#0: ffff888028e220e0 (&type->s_umount_key#75){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888028e220e0 (&type->s_umount_key#75){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888028e220e0 (&type->s_umount_key#75){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
1 lock held by syz.3.145/6924:
#0: ffff888028e220e0 (&type->s_umount_key#75){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888028e220e0 (&type->s_umount_key#75){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.0.189/7188:
#0: ffff888028e220e0 (&type->s_umount_key#75){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888028e220e0 (&type->s_umount_key#75){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.4.269/8053:
#0: ffff888028e220e0 (&type->s_umount_key#75){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888028e220e0 (&type->s_umount_key#75){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.6.294/8246:
#0: ffff888028e220e0 (&type->s_umount_key#75){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888028e220e0 (&type->s_umount_key#75){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz-executor/8487:
#0: ffffffff8ed43438 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline]
#0: ffffffff8ed43438 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x454/0x830 kernel/rcu/tree_exp.h:998
1 lock held by syz.2.321/8558:
#0: ffff888028e220e0 (&type->s_umount_key#75){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888028e220e0 (&type->s_umount_key#75){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.2.321/8583:
#0: ffff888028e220e0 (&type->s_umount_key#75){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888028e220e0 (&type->s_umount_key#75){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.9.408/9504:
#0: ffff888028e220e0 (&type->s_umount_key#75){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888028e220e0 (&type->s_umount_key#75){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by dhcpcd/9632:
#0: ffff888028d78258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1651 [inline]
#0: ffff888028d78258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3252
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc3-syzkaller-00001-g9d7a0577c9db #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x4ab/0x4e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:437
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
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: 63 Comm: kworker/u8:4 Not tainted 6.15.0-rc3-syzkaller-00001-g9d7a0577c9db #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:mark_held_locks kernel/locking/lockdep.c:4326 [inline]
RIP: 0010:__trace_hardirqs_on_caller kernel/locking/lockdep.c:4344 [inline]
RIP: 0010:lockdep_hardirqs_on_prepare+0x131/0x2b0 kernel/locking/lockdep.c:4411
Code: 48 83 fb 31 73 2a 41 8b 44 24 20 a9 00 00 04 00 74 db 31 d2 a9 00 00 03 00 0f 94 c2 83 f2 03 4c 89 f7 4c 89 e6 e8 5f 4a 00 00 <85> c0 75 bf eb 76 48 c7 c7 f0 ed c0 8e 48 89 de e8 fa b3 99 03 eb
RSP: 0018:ffffc900015575f8 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000004 RCX: 0000000000000002
RDX: 0000000000000002 RSI: ffff88801d398b90 RDI: ffff88801d398000
RBP: ffffc90001557840 R08: ffffffff905ebb77 R09: 1ffffffff20bd76e
R10: dffffc0000000000 R11: fffffbfff20bd76f R12: ffff88801d398b90
R13: ffffffff93651020 R14: ffff88801d398000 R15: ffff88801d398af0
FS: 0000000000000000(0000) GS:ffff888124fcf000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f892c180178 CR3: 000000000eb38000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:78
smp_call_function_many_cond+0x17c4/0x2d40 kernel/smp.c:877
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052
text_poke_bp_batch+0x9f1/0xb30 arch/x86/kernel/alternative.c:-1
text_poke_flush arch/x86/kernel/alternative.c:2856 [inline]
text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2863
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:210
static_key_enable+0x1a/0x20 kernel/jump_label.c:223
toggle_allocation_gate+0xc0/0x250 mm/kfence/core.c:850
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd50 kernel/workqueue.c:3400
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245