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:28080 pid: 30 ppid: 2 flags:0x00004000
Call Trace:
<TASK>
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
</TASK>
Showing all locks held in the system:
1 lock held by systemd/1:
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
4 locks held by kworker/1:1H/51:
1 lock held by kswapd0/98:
1 lock held by kswapd1/99:
1 lock held by systemd-journal/2921:
1 lock held by in:imklog/6162:
1 lock held by syz-fuzzer/6467:
3 locks held by kworker/0:51/21815:
2 locks held by syz-executor.5/23142:
#0: ffff8880110b5008 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
#0: ffff8880110b5008 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: page_cache_ra_unbounded+0x1b3/0x940 mm/readahead.c:194
#1: ffffffff8baa8b08 (pcpu_drain_mutex){+.+.}-{3:3}, at: __drain_all_pages+0x4f/0x6c0 mm/page_alloc.c:3181
=============================================
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:
<TASK>
__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
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 51 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:write_comp_data kernel/kcov.c:218 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x22/0x80 kernel/kcov.c:270
Code: 10 c3 66 0f 1f 44 00 00 53 41 89 fb 41 89 f1 bf 03 00 00 00 65 48 8b 0c 25 40 70 02 00 48 89 ce 4c 8b 54 24 08 e8 4e f1 ff ff <84> c0 74 51 48 8b 81 88 15 00 00 44 8b 81 84 15 00 00 48 8b 10 49
RSP: 0018:ffffc900012ff260 EFLAGS: 00000093
RAX: 0000000000000000 RBX: ffffea0008b2de08 RCX: ffff888016d03a00
RDX: 0000000000000000 RSI: ffff888016d03a00 RDI: 0000000000000003
RBP: ffffea0008b2de00 R08: 0000000000000001 R09: 0000000008b2de00
R10: ffffffff81a2dadb R11: 0000000000000000 R12: ffffea0008b2de10
R13: 0000000000000003 R14: dffffc0000000000 R15: ffffea0008b2de00
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3957c47f10 CR3: 000000000b68e000 CR4: 0000000000350ee0
Call Trace:
<TASK>
move_pages_to_lru+0x3eb/0x16b0 mm/vmscan.c:2291
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
</TASK>
----------------
Code disassembly (best guess):
0: 10 c3 adc %al,%bl
2: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
8: 53 push %rbx
9: 41 89 fb mov %edi,%r11d
c: 41 89 f1 mov %esi,%r9d
f: bf 03 00 00 00 mov $0x3,%edi
14: 65 48 8b 0c 25 40 70 mov %gs:0x27040,%rcx
1b: 02 00
1d: 48 89 ce mov %rcx,%rsi
20: 4c 8b 54 24 08 mov 0x8(%rsp),%r10
25: e8 4e f1 ff ff callq 0xfffff178
* 2a: 84 c0 test %al,%al <-- trapping instruction
2c: 74 51 je 0x7f
2e: 48 8b 81 88 15 00 00 mov 0x1588(%rcx),%rax
35: 44 8b 81 84 15 00 00 mov 0x1584(%rcx),%r8d
3c: 48 8b 10 mov (%rax),%rdx
3f: 49 rex.WB