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:27608 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:
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 kswapd0/97:
1 lock held by kswapd1/98:
5 locks held by kworker/u4:5/1060:
4 locks held by kworker/1:1H/1444:
2 locks held by systemd-journal/2916:
1 lock held by systemd-timesyn/3023:
2 locks held by cron/6163:
2 locks held by in:imklog/6170:
2 locks held by syz-fuzzer/6461:
2 locks held by syz-fuzzer/6489:
1 lock held by syz-executor.0/17475:
=============================================
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+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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 1444 Comm: kworker/1:1H Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_highpri fill_page_cache_func
RIP: 0010:rcu_is_watching+0x0/0xb0 kernel/rcu/tree.c:1117
Code: 3f 5b 00 e9 2c ff ff ff 66 90 48 c7 c7 20 6f 8d 89 e8 54 eb d5 07 65 8a 05 49 83 a0 7e 0f be c0 c3 66 0f 1f 84 00 00 00 00 00 <55> 53 65 ff 05 b7 48 9f 7e e8 12 eb d5 07 48 c7 c3 50 aa 03 00 83
RSP: 0018:ffffc90005aef240 EFLAGS: 00000093
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801da00000 RSI: ffffffff81a28f0f RDI: ffffea0001991d40
RBP: ffffea0001991d40 R08: 0000000000000000 R09: ffffea0001991d47
R10: fffff940003323a8 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88814484f440 R14: dffffc0000000000 R15: ffffea0001991d40
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3939e33303 CR3: 00000000723e5000 CR4: 0000000000350ee0
Call Trace:
rcu_read_unlock include/linux/rcupdate.h:717 [inline]
page_evictable+0x1b4/0x360 mm/internal.h:125
move_pages_to_lru+0x2ba/0x16b0 mm/vmscan.c:2271
shrink_inactive_list mm/vmscan.c:2390 [inline]
shrink_list mm/vmscan.c:2614 [inline]
shrink_lruvec+0xcb4/0x2660 mm/vmscan.c:2933
shrink_node_memcgs mm/vmscan.c:3122 [inline]
shrink_node+0x858/0x1eb0 mm/vmscan.c:3245
shrink_zones mm/vmscan.c:3478 [inline]
do_try_to_free_pages+0x4e2/0x1640 mm/vmscan.c:3534
try_to_free_pages+0x29f/0x750 mm/vmscan.c:3769
__perform_reclaim mm/page_alloc.c:4588 [inline]
__alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline]
__alloc_pages_slowpath.constprop.0+0xac7/0x20d0 mm/page_alloc.c:5007
__alloc_pages+0x412/0x500 mm/page_alloc.c:5382
alloc_pages+0x1a7/0x300 mm/mempolicy.c:2191
__get_free_pages+0x8/0x40 mm/page_alloc.c:5418
fill_page_cache_func+0xad/0x240 kernel/rcu/tree.c:3412
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), 3 bytes skipped:
0: e9 2c ff ff ff jmpq 0xffffff31
5: 66 90 xchg %ax,%ax
7: 48 c7 c7 20 6f 8d 89 mov $0xffffffff898d6f20,%rdi
e: e8 54 eb d5 07 callq 0x7d5eb67
13: 65 8a 05 49 83 a0 7e mov %gs:0x7ea08349(%rip),%al # 0x7ea08363
1a: 0f be c0 movsbl %al,%eax
1d: c3 retq
1e: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1)
25: 00 00
* 27: 55 push %rbp <-- trapping instruction
28: 53 push %rbx
29: 65 ff 05 b7 48 9f 7e incl %gs:0x7e9f48b7(%rip) # 0x7e9f48e7
30: e8 12 eb d5 07 callq 0x7d5eb47
35: 48 c7 c3 50 aa 03 00 mov $0x3aa50,%rbx
3c: 83 .byte 0x83