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:28072 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:1371
lock_page include/linux/pagemap.h:747 [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: ffffffff8b980ea0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by khugepaged/33:
1 lock held by kswapd0/91:
1 lock held by kswapd1/99:
1 lock held by in:imklog/6232:
1 lock held by syz-fuzzer/6545:
#0: ffff88806c24ea90 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
#0: ffff88806c24ea90 (mapping.invalidate_lock){++++}-{3:3}, at: page_cache_ra_unbounded+0x1b3/0x940 mm/readahead.c:194
1 lock held by syz-fuzzer/16044:
#0: ffff88806c24ea90 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
#0: ffff88806c24ea90 (mapping.invalidate_lock){++++}-{3:3}, at: page_cache_ra_unbounded+0x1b3/0x940 mm/readahead.c:194
1 lock held by syz-executor.4/7593:
#0: ffff8880172da988 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
#0: ffff8880172da988 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0x1b3/0x940 mm/readahead.c:194
=============================================
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: 6233 Comm: rs:main Q:Reg Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_del_entry_valid+0xad/0xf0 lib/list_debug.c:54
Code: 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 df 2e 28 05 49 8d 7d 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <75> 22 49 8b 55 08 48 39 ea 0f 85 f0 2e 28 05 5d b8 01 00 00 00 41
RSP: 0018:ffffc9000bfaed08 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffffea00065c3e08 RCX: 0000000000000001
RDX: 1ffff11028173e05 RSI: ffffffff81a2fb61 RDI: ffff888140b9f028
RBP: ffffea00065c3e08 R08: 0000000000000001 R09: 00000000065c3e01
R10: ffffffff81a2fb53 R11: 0000000000000000 R12: ffffea00065c3e48
R13: ffff888140b9f020 R14: ffff888140b9f020 R15: 0000000000000000
FS: 00007ff1f1478700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001530000 CR3: 000000006ca0d000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__list_del_entry include/linux/list.h:134 [inline]
list_move include/linux/list.h:217 [inline]
isolate_lru_pages+0x567/0x17b0 mm/vmscan.c:2141
shrink_inactive_list mm/vmscan.c:2379 [inline]
shrink_list mm/vmscan.c:2621 [inline]
shrink_lruvec+0xb2e/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 mm/filemap.c:1036 [inline]
__filemap_get_folio+0x5f2/0xd60 mm/filemap.c:1951
pagecache_get_page+0x2c/0x1a0 mm/folio-compat.c:125
ext4_da_write_begin+0x3bc/0xad0 fs/ext4/inode.c:2958
generic_perform_write+0x205/0x510 mm/filemap.c:3756
ext4_buffered_write_iter+0x1ac/0x3b0 fs/ext4/file.c:269
ext4_file_write_iter+0x423/0x14e0 fs/ext4/file.c:681
call_write_iter include/linux/fs.h:2162 [inline]
new_sync_write+0x429/0x660 fs/read_write.c:503
vfs_write+0x7cd/0xae0 fs/read_write.c:590
ksys_write+0x12d/0x250 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff1f3ebc1cd
Code: c2 20 00 00 75 10 b8 01 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ae fc ff ff 48 89 04 24 b8 01 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 f7 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007ff1f1477590 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff1e40230d0 RCX: 00007ff1f3ebc1cd
RDX: 00000000000009b7 RSI: 00007ff1e40230d0 RDI: 0000000000000009
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007ff1e4022e50
R13: 00007ff1f14775b0 R14: 00005565b1c22440 R15: 00000000000009b7
----------------
Code disassembly (best guess):
0: 02 00 add (%rax),%al
2: 75 51 jne 0x55
4: 49 8b 14 24 mov (%r12),%rdx
8: 48 39 ea cmp %rbp,%rdx
b: 0f 85 df 2e 28 05 jne 0x5282ef0
11: 49 8d 7d 08 lea 0x8(%r13),%rdi
15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1c: fc ff df
1f: 48 89 fa mov %rdi,%rdx
22: 48 c1 ea 03 shr $0x3,%rdx
26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
* 2a: 75 22 jne 0x4e <-- trapping instruction
2c: 49 8b 55 08 mov 0x8(%r13),%rdx
30: 48 39 ea cmp %rbp,%rdx
33: 0f 85 f0 2e 28 05 jne 0x5282f29
39: 5d pop %rbp
3a: b8 01 00 00 00 mov $0x1,%eax
3f: 41 rex.B