INFO: task kcompactd0:30 blocked for more than 145 seconds.
Not tainted 5.15.0-rc3-next-20211001-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kcompactd0 state:D stack:28152 pid: 30 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4955 [inline]
__schedule+0x940/0x26f0 kernel/sched/core.c:6236
schedule+0xd3/0x270 kernel/sched/core.c:6315
io_schedule+0xba/0x130 kernel/sched/core.c:8359
folio_wait_bit_common+0x4f2/0xa60 mm/filemap.c:1364
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+0xa5e/0x3890 mm/migrate.c:1481
compact_zone+0x1abb/0x3860 mm/compaction.c:2393
kcompactd_do_work+0x2c9/0x730 mm/compaction.c:2833
kcompactd+0x86d/0xf30 mm/compaction.c:2935
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task syz-executor.5:25702 can't die for more than 146 seconds.
task:syz-executor.5 state:R running task stack:24768 pid:25702 ppid: 25054 flags:0x00004006
Call Trace:
Showing all locks held in the system:
1 lock held by systemd/1:
1 lock held by khungtaskd/27:
#0: ffffffff8b981260 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by kswapd0/91:
1 lock held by kswapd1/99:
3 locks held by kworker/1:2/137:
1 lock held by systemd-journal/2967:
2 locks held by cron/6224:
#0: ffffffff8c140b18 (tomoyo_ss){....}-{0:0}, at: tomoyo_path_perm+0x1c1/0x400 security/tomoyo/file.c:847
#1: ffffffff8baa3f28 (pcpu_drain_mutex){+.+.}-{3:3}, at: __drain_all_pages+0x4f/0x6c0 mm/page_alloc.c:3179
1 lock held by in:imklog/6232:
1 lock held by syz-fuzzer/6525:
1 lock held by syz-fuzzer/13021:
2 locks held by syz-executor.5/25702:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc3-next-20211001-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:254 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:339
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: 25702 Comm: syz-executor.5 Not tainted 5.15.0-rc3-next-20211001-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_region_inline mm/kasan/generic.c:170 [inline]
RIP: 0010:kasan_check_range+0x12c/0x180 mm/kasan/generic.c:189
Code: 00 74 ef 49 8d 04 2c 48 85 d2 75 0b 48 89 da 48 29 c2 e9 55 ff ff ff 49 39 d2 75 17 49 0f be 02 41 83 e1 07 49 39 c1 7d 0a 5b 01 00 00 00 5d 41 5c c3 44 89 c2 e8 53 ef ff ff 5b 83 f0 01 5d
RSP: 0018:ffffc90017d8f118 EFLAGS: 00000046
RAX: fffffbfff1fa2f3e RBX: 000000000000054b RCX: ffffffff815b553d
RDX: fffffbfff1fa2f3e RSI: 0000000000000008 RDI: ffffffff8fd179e8
RBP: fffffbfff1fa2f3d R08: 0000000000000000 R09: ffffffff8fd179ef
R10: fffffbfff1fa2f3d R11: 0000000000000000 R12: 0000000000000000
R13: ffff888022ed0000 R14: ffff888022ed0a68 R15: dffffc0000000000
FS: 00007f78b854e700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff0076d99c0 CR3: 00000000852ca000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
hlock_class kernel/locking/lockdep.c:199 [inline]
check_wait_context kernel/locking/lockdep.c:4725 [inline]
__lock_acquire+0x6ed/0x54a0 kernel/locking/lockdep.c:4977
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:694 [inline]
xa_load+0xc2/0x280 lib/xarray.c:1454
__readahead_folio include/linux/pagemap.h:1069 [inline]
readahead_page include/linux/pagemap.h:1087 [inline]
mpage_readahead+0x19e/0x750 fs/mpage.c:385
read_pages+0x1e4/0xfa0 mm/readahead.c:129
page_cache_ra_unbounded+0x64b/0x940 mm/readahead.c:238
do_page_cache_ra+0xf9/0x140 mm/readahead.c:268
do_sync_mmap_readahead mm/filemap.c:2986 [inline]
filemap_fault+0x1562/0x26d0 mm/filemap.c:3079
__do_fault+0x10d/0x4d0 mm/memory.c:3849
do_read_fault mm/memory.c:4155 [inline]
do_fault mm/memory.c:4284 [inline]
handle_pte_fault mm/memory.c:4542 [inline]
__handle_mm_fault+0x28e8/0x5120 mm/memory.c:4677
handle_mm_fault+0x1c8/0x790 mm/memory.c:4775
faultin_page mm/gup.c:937 [inline]
__get_user_pages+0x503/0xf80 mm/gup.c:1158
populate_vma_page_range+0x24d/0x330 mm/gup.c:1490
__mm_populate+0x1ea/0x3e0 mm/gup.c:1599
mm_populate include/linux/mm.h:2733 [inline]
vm_mmap_pgoff+0x20e/0x290 mm/util.c:524
ksys_mmap_pgoff+0x49f/0x620 mm/mmap.c:1624
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: 0033:0x7f78baff88d9
Code: Unable to access opcode bytes at RIP 0x7f78baff88af.
RSP: 002b:00007f78b854e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f78bb0fd020 RCX: 00007f78baff88d9
RDX: 0000000001000002 RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f78bb052cb4 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd6bda828f R14: 00007f78b854e300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 00 74 ef 49 add %dh,0x49(%rdi,%rbp,8)
4: 8d 04 2c lea (%rsp,%rbp,1),%eax
7: 48 85 d2 test %rdx,%rdx
a: 75 0b jne 0x17
c: 48 89 da mov %rbx,%rdx
f: 48 29 c2 sub %rax,%rdx
12: e9 55 ff ff ff jmpq 0xffffff6c
17: 49 39 d2 cmp %rdx,%r10
1a: 75 17 jne 0x33
1c: 49 0f be 02 movsbq (%r10),%rax
20: 41 83 e1 07 and $0x7,%r9d
24: 49 39 c1 cmp %rax,%r9
27: 7d 0a jge 0x33
29: 5b pop %rbx
* 2a: b8 01 00 00 00 mov $0x1,%eax <-- trapping instruction
2f: 5d pop %rbp
30: 41 5c pop %r12
32: c3 retq
33: 44 89 c2 mov %r8d,%edx
36: e8 53 ef ff ff callq 0xffffef8e
3b: 5b pop %rbx
3c: 83 f0 01 xor $0x1,%eax
3f: 5d pop %rbp