INFO: task kcompactd0:30 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:kcompactd0 state:D stack:28312 pid: 30 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
io_schedule+0xee/0x170 kernel/sched/core.c:8368
folio_wait_bit_common+0x4f2/0xa60 mm/filemap.c:1363
lock_page include/linux/pagemap.h:697 [inline]
__unmap_and_move mm/migrate.c:986 [inline]
unmap_and_move mm/migrate.c:1210 [inline]
migrate_pages+0xa5a/0x3810 mm/migrate.c:1487
compact_zone+0x1abb/0x3860 mm/compaction.c:2399
kcompactd_do_work+0x2c9/0x730 mm/compaction.c:2839
kcompactd+0x86b/0xf30 mm/compaction.c:2941
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Showing all locks held in the system:
2 locks held by systemd/1:
#0: ffff88801e15b768 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
#0: ffff88801e15b768 (mapping.invalidate_lock){++++}-{3:3}, at: page_cache_ra_unbounded+0x1b3/0x940 mm/readahead.c:194
#1: ffffffff8baa8d88 (pcpu_drain_mutex){+.+.}-{3:3}, at: __drain_all_pages+0x4f/0x6c0 mm/page_alloc.c:3181
1 lock held by khungtaskd/27:
#0: ffffffff8b983a20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6461
1 lock held by khugepaged/33:
#0: ffffffff8ba68ac8 (lock#5){+.+.}-{3:3}, at: __lru_add_drain_all+0x65/0x760 mm/swap.c:797
6 locks held by kworker/u4:2/54:
1 lock held by kswapd0/98:
1 lock held by kswapd1/99:
3 locks held by kworker/1:3/2901:
1 lock held by systemd-journal/2923:
1 lock held by systemd-timesyn/3025:
1 lock held by cron/6153:
1 lock held by in:imklog/6168:
1 lock held by syz-fuzzer/6460:
1 lock held by syz-fuzzer/8776:
1 lock held by syz-executor.5/4531:
=============================================
NMI backtrace for cpu 1
CPU: 1 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+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 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+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 58 Comm: kworker/u4:3 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:debug_smp_processor_id+0x0/0x20 lib/smp_processor_id.c:60
Code: 4d 8d 86 30 08 00 00 83 e9 01 e8 47 3e bd ff 48 8b 74 24 28 48 c7 c7 20 97 e4 89 e8 36 3e bd ff e8 e2 df cc ff eb a2 0f 1f 00 <0f> 1f 44 00 00 48 c7 c6 60 97 e4 89 48 c7 c7 a0 97 e4 89 e9 78 fe
RSP: 0018:ffffc90001a3f828 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 1ffff92000347f0d RCX: ffffffff815cdfc8
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8d6fc650
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8d6fc657
R10: fffffbfff1adf8ca R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: ffffffff9047a218 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd5144c0360 CR3: 000000000b68e000 CR4: 0000000000350ef0
Call Trace:
rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:330 [inline]
rcu_is_watching+0xe/0xb0 kernel/rcu/tree.c:1121
rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
rcu_read_lock_sched_held+0x1c/0x70 kernel/rcu/update.c:123
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0x442/0x510 kernel/locking/lockdep.c:5611
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
debug_object_activate+0x12e/0x3e0 lib/debugobjects.c:661
debug_timer_activate kernel/time/timer.c:729 [inline]
__mod_timer+0x77d/0xe30 kernel/time/timer.c:1050
schedule_timeout+0x145/0x2a0 kernel/time/timer.c:1880
toggle_allocation_gate mm/kfence/core.c:739 [inline]
toggle_allocation_gate+0x305/0x390 mm/kfence/core.c:724
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 4d 8d 86 30 08 00 00 lea 0x830(%r14),%r8
7: 83 e9 01 sub $0x1,%ecx
a: e8 47 3e bd ff callq 0xffbd3e56
f: 48 8b 74 24 28 mov 0x28(%rsp),%rsi
14: 48 c7 c7 20 97 e4 89 mov $0xffffffff89e49720,%rdi
1b: e8 36 3e bd ff callq 0xffbd3e56
20: e8 e2 df cc ff callq 0xffcce007
25: eb a2 jmp 0xffffffc9
27: 0f 1f 00 nopl (%rax)
* 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction
2f: 48 c7 c6 60 97 e4 89 mov $0xffffffff89e49760,%rsi
36: 48 c7 c7 a0 97 e4 89 mov $0xffffffff89e497a0,%rdi
3d: e9 .byte 0xe9
3e: 78 fe js 0x3e