INFO: task kworker/0:7:28535 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:7 state:D stack:22800 pid:28535 ppid: 2 flags:0x00004000
Workqueue: events cgroup1_release_agent
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6250
schedule+0x12b/0x1f0 kernel/sched/core.c:6323
schedule_timeout+0xac/0x300 kernel/time/timer.c:1857
do_wait_for_common+0x2da/0x480 kernel/sched/completion.c:85
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x46/0x60 kernel/sched/completion.c:138
call_usermodehelper_exec+0x299/0x430 kernel/umh.c:450
cgroup1_release_agent+0x330/0x3c0 kernel/cgroup/cgroup-v1.c:805
process_one_work+0x853/0x1140 kernel/workqueue.c:2298
worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Showing all locks held in the system:
2 locks held by systemd/1:
1 lock held by kthreadd/2:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1d900 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by khugepaged/33:
#0: ffffffff8cbb6288 (lock#5){+.+.}-{3:3}, at: __lru_add_drain_all+0x67/0x9d0 mm/swap.c:797
1 lock held by kswapd0/97:
1 lock held by kswapd1/98:
2 locks held by kworker/u4:5/1041:
#0: ffff888011469138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc90004717d20 ((kfence_timer).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273
4 locks held by kworker/1:3/2953:
1 lock held by systemd-journal/2969:
1 lock held by systemd-udevd/2973:
2 locks held by systemd-timesyn/3058:
2 locks held by in:imklog/6227:
#0: ffff888019b6c370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990
#1: ffffffff8cbe1a28 (pcpu_drain_mutex){+.+.}-{3:3}, at: __drain_all_pages+0x58/0x690 mm/page_alloc.c:3181
2 locks held by cron/6206:
2 locks held by syz-fuzzer/6515:
2 locks held by syz-fuzzer/6518:
1 lock held by syz-executor.5/6790:
3 locks held by kworker/0:5/8525:
2 locks held by kworker/0:7/28535:
#0: ffff888011464d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc90004757d20 ((work_completion)(&cgrp->release_agent_work)){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273
1 lock held by syz-executor.1/30907:
1 lock held by systemd-sysctl/30968:
2 locks held by systemd-cgroups/30970:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc82/0xcd0 kernel/hung_task.c:295
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 28188 Comm: kworker/u4:0 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:check_preemption_disabled+0x6c/0x1c0 lib/smp_processor_id.c:55
Code: 00 00 81 e5 ff ff ff 7f 74 2a 0f 1f 44 00 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 08 0f 85 52 01 00 00 89 d8 48 83 c4 10 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00 00 9c 8f 04 24
RSP: 0018:ffffc900028ef5a8 EFLAGS: 00000086
RAX: 0000000000000001 RBX: 1ffff9200051dec0 RCX: 0000000080000002
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000
RBP: 0000000000000003 R08: dffffc0000000000 R09: fffffbfff1bfa7b6
R10: fffffbfff1bfa7b6 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff8ad4b0e0 R15: ffffffff8ad4b0a0
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa57b06a018 CR3: 000000000c88e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_lockdep_current_cpu_online+0x36/0x130 kernel/rcu/tree.c:1169
rcu_read_lock_held_common kernel/rcu/update.c:112 [inline]
rcu_read_lock_sched_held+0x74/0x130 kernel/rcu/update.c:123
trace_tlb_flush+0x7b/0x190 include/trace/events/tlb.h:38
switch_mm_irqs_off+0x5cf/0x940
unuse_temporary_mm arch/x86/kernel/alternative.c:946 [inline]
__text_poke+0x767/0x9f0 arch/x86/kernel/alternative.c:1042
text_poke arch/x86/kernel/alternative.c:1083 [inline]
text_poke_bp_batch+0x6b0/0x940 arch/x86/kernel/alternative.c:1361
text_poke_flush arch/x86/kernel/alternative.c:1451 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1458
arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x12d/0x250 kernel/jump_label.c:177
static_key_enable+0x16/0x20 kernel/jump_label.c:190
toggle_allocation_gate+0xbf/0x460 mm/kfence/core.c:732
process_one_work+0x853/0x1140 kernel/workqueue.c:2298
worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 81 e5 ff ff ff 7f and $0x7fffffff,%ebp
8: 74 2a je 0x34
a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
f: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
16: 00 00
18: 48 3b 44 24 08 cmp 0x8(%rsp),%rax
1d: 0f 85 52 01 00 00 jne 0x175
23: 89 d8 mov %ebx,%eax
25: 48 83 c4 10 add $0x10,%rsp
29: 5b pop %rbx
* 2a: 41 5c pop %r12 <-- trapping instruction
2c: 41 5d pop %r13
2e: 41 5e pop %r14
30: 41 5f pop %r15
32: 5d pop %rbp
33: c3 retq
34: 48 c7 04 24 00 00 00 movq $0x0,(%rsp)
3b: 00
3c: 9c pushfq
3d: 8f 04 24 popq (%rsp)