INFO: task kcompactd0:30 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kcompactd0 state:D stack:28440 pid: 30 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
io_schedule+0xee/0x170 kernel/sched/core.c:8371
folio_wait_bit_common+0x4f2/0xa60 mm/filemap.c:1371
lock_page include/linux/pagemap.h:796 [inline]
__unmap_and_move mm/migrate.c:980 [inline]
unmap_and_move mm/migrate.c:1204 [inline]
migrate_pages+0xa5a/0x3810 mm/migrate.c:1481
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: ffffffff8bb83d20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by khugepaged/33:
#0: ffffffff8bc68d68 (lock#5){+.+.}-{3:3}, at: __lru_add_drain_all+0x65/0x760 mm/swap.c:798
1 lock held by kswapd0/96:
2 locks held by systemd-journal/2958:
1 lock held by in:imklog/6214:
1 lock held by syz-fuzzer/6509:
2 locks held by kworker/u4:2/1444:
3 locks held by kworker/1:2/5644:
3 locks held by kworker/0:0/14524:
2 locks held by syz-executor.2/16086:
#0: ffff888016b7d008 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
#0: ffff888016b7d008 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: page_cache_ra_unbounded+0x1b3/0x940 mm/readahead.c:194
#1: ffffffff8bca9028 (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 5.16.0-rc4-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:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 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: 6509 Comm: syz-fuzzer Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:_compound_head include/linux/page-flags.h:198 [inline]
RIP: 0010:add_page_to_lru_list include/linux/mm_inline.h:106 [inline]
RIP: 0010:move_pages_to_lru+0x598/0x16b0 mm/vmscan.c:2316
Code: 04 00 00 e8 4a cc d4 ff 48 89 ef e8 52 ac ff ff 49 39 c4 0f 85 2d ff ff ff e8 34 cc d4 ff 48 89 d8 48 c1 e8 03 42 80 3c 30 00 <0f> 85 dc 0e 00 00 4c 8b 2b 31 ff 4c 89 ed 83 e5 01 48 89 ee e8 9f
RSP: 0018:ffffc90001a7efb8 EFLAGS: 00000046
RAX: 1ffffd4000eac0f9 RBX: ffffea00075607c8 RCX: 0000000000000000
RDX: ffff88807b318000 RSI: ffffffff81a2debc RDI: 0000000000000003
RBP: ffffea00075607c0 R08: 0000000000000000 R09: ffffea00075607c7
R10: ffffffff81a28bf0 R11: 0000000000000000 R12: ffff888010e5c000
R13: 0000000000000001 R14: dffffc0000000000 R15: ffffea00075607c0
FS: 000000c000187c90(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000726600 CR3: 000000001c960000 CR4: 0000000000350ee0
Call Trace:
shrink_inactive_list mm/vmscan.c:2397 [inline]
shrink_list mm/vmscan.c:2621 [inline]
shrink_lruvec+0xcb4/0x2660 mm/vmscan.c:2940
shrink_node_memcgs mm/vmscan.c:3129 [inline]
shrink_node+0x858/0x1eb0 mm/vmscan.c:3252
shrink_zones mm/vmscan.c:3485 [inline]
do_try_to_free_pages+0x4e2/0x1640 mm/vmscan.c:3541
try_to_free_pages+0x29f/0x750 mm/vmscan.c:3776
__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
folio_alloc+0x1c/0x70 mm/mempolicy.c:2201
filemap_alloc_folio+0x8e/0xb0 mm/filemap.c:1036
__page_cache_alloc include/linux/pagemap.h:374 [inline]
page_cache_ra_unbounded+0x36a/0x940 mm/readahead.c:215
do_page_cache_ra+0xf9/0x140 mm/readahead.c:268
do_sync_mmap_readahead mm/filemap.c:2996 [inline]
filemap_fault+0x1562/0x26d0 mm/filemap.c:3089
__do_fault+0x10d/0x4d0 mm/memory.c:3849
do_read_fault mm/memory.c:4164 [inline]
do_fault mm/memory.c:4293 [inline]
handle_pte_fault mm/memory.c:4551 [inline]
__handle_mm_fault+0x28e8/0x5120 mm/memory.c:4686
handle_mm_fault+0x1c8/0x790 mm/memory.c:4784
do_user_addr_fault+0x489/0x11c0 arch/x86/mm/fault.c:1397
handle_page_fault arch/x86/mm/fault.c:1485 [inline]
exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1541
asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0033:0x414ca5
Code: 00 00 00 00 00 48 39 c8 0f 84 af 00 00 00 80 3d 54 19 48 01 00 0f 84 98 00 00 00 48 8b 54 24 38 48 8b 5a 08 90 48 85 db 75 62 <48> 8b 1a 48 89 04 24 48 89 4c 24 08 48 89 5c 24 10 e8 a5 84 05 00
RSP: 002b:000000c0000bfc40 EFLAGS: 00010246
RAX: 000000c01a3c4bc0 RBX: 0000000000000018 RCX: 000000c0000bfd48
RDX: 0000000000726600 RSI: c063f0b799bebd4a RDI: 0000000000000001
RBP: 000000c0000bfc68 R08: 0000000000000a98 R09: 00007ffc3736e080
R10: 00007ffc3736e090 R11: 0000000000081b7a R12: 00000277b56e5370
R13: 0000000000000001 R14: 00000277b56e5370 R15: 000000000000cee5
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 00 00 add %al,(%rax)
2: e8 4a cc d4 ff callq 0xffd4cc51
7: 48 89 ef mov %rbp,%rdi
a: e8 52 ac ff ff callq 0xffffac61
f: 49 39 c4 cmp %rax,%r12
12: 0f 85 2d ff ff ff jne 0xffffff45
18: e8 34 cc d4 ff callq 0xffd4cc51
1d: 48 89 d8 mov %rbx,%rax
20: 48 c1 e8 03 shr $0x3,%rax
24: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1)
* 29: 0f 85 dc 0e 00 00 jne 0xf0b <-- trapping instruction
2f: 4c 8b 2b mov (%rbx),%r13
32: 31 ff xor %edi,%edi
34: 4c 89 ed mov %r13,%rbp
37: 83 e5 01 and $0x1,%ebp
3a: 48 89 ee mov %rbp,%rsi
3d: e8 .byte 0xe8
3e: 9f lahf