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:28384 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: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: 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 kswapd0/98:
1 lock held by kswapd1/99:
1 lock held by systemd-journal/2964:
2 locks held by systemd-udevd/2973:
1 lock held by systemd-timesyn/3057:
2 locks held by in:imklog/6217:
#0: ffff88801f07c930 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
#1: ffffffff8baa3480 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline]
#1: ffffffff8baa3480 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline]
#1: ffffffff8baa3480 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0xa1e/0x20d0 mm/page_alloc.c:5007
1 lock held by cron/6207:
2 locks held by agetty/6457:
#0: ffff88807754a098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc90002a742e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
2 locks held by syz-fuzzer/6535:
1 lock held by syz-fuzzer/6539:
3 locks held by kworker/0:10/21298:
1 lock held by systemd-udevd/29231:
1 lock held by systemd-udevd/29507:
#0: ffffffff8baa3480 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline]
#0: ffffffff8baa3480 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline]
#0: ffffffff8baa3480 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0xa1e/0x20d0 mm/page_alloc.c:5007
1 lock held by systemd-udevd/29531:
5 locks held by kworker/u4:1/21092:
3 locks held by kworker/1:2/1817:
1 lock held by syz-executor.0/6768:
=============================================
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: 29531 Comm: systemd-udevd Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:hlock_class kernel/locking/lockdep.c:203 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:192 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4725 [inline]
RIP: 0010:__lock_acquire+0x739/0x54a0 kernel/locking/lockdep.c:4977
Code: e9 2a 90 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 c6 33 00 00 8b 05 c6 33 cf 0e 85 c0 0f 84 3a 07 00 00 31 c0 e9 0f ff ff ff <4c> 8b 64 24 58 40 38 6c 24 50 76 0d e8 96 f0 7b 02 85 c0 0f 85 60
RSP: 0018:ffffc900047c6fe8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000209 RCX: ffffffff815bb5bd
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8fd79598
RBP: 0000000000000002 R08: 0000000000000000 R09: ffffffff8fd60a47
R10: fffffbfff1fac148 R11: 0000000000000000 R12: 0000000000000002
R13: ffff88803a0fa000 R14: ffff88803a0faa60 R15: dffffc0000000000
FS: 00007efed55498c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4f68a104a0 CR3: 000000001a04a000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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:688 [inline]
page_evictable+0x38/0x360 mm/internal.h:123
move_pages_to_lru+0x2ba/0x16b0 mm/vmscan.c:2278
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_node include/linux/gfp.h:570 [inline]
kmem_getpages mm/slab.c:1377 [inline]
cache_grow_begin+0x75/0x470 mm/slab.c:2593
fallback_alloc+0x1e4/0x2e0 mm/slab.c:3140
__do_cache_alloc mm/slab.c:3282 [inline]
slab_alloc mm/slab.c:3316 [inline]
kmem_cache_alloc+0x367/0x560 mm/slab.c:3507
getname_flags.part.0+0x50/0x4f0 fs/namei.c:138
getname_flags include/linux/audit.h:323 [inline]
getname+0x8e/0xd0 fs/namei.c:217
do_sys_openat2+0xf5/0x4d0 fs/open.c:1206
do_sys_open fs/open.c:1228 [inline]
__do_sys_open fs/open.c:1236 [inline]
__se_sys_open fs/open.c:1232 [inline]
__x64_sys_open+0x119/0x1c0 fs/open.c:1232
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: 0033:0x7efed43bb6f0
Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 19 30 2c 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 fe 9d 01 00 48 89 04 24
RSP: 002b:00007ffee8aa56f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00005566efff6530 RCX: 00007efed43bb6f0
RDX: 00000000000001b6 RSI: 0000000000080000 RDI: 00007ffee8aa58a0
RBP: 0000000000000008 R08: 0000000000000008 R09: 0000000000000001
R10: 0000000000080000 R11: 0000000000000246 R12: 00005566efbca68a
R13: 0000000000000001 R14: 00005566effd9560 R15: 00007ffee8aa5920
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 90 nop
1: 83 e0 07 and $0x7,%eax
4: 83 c0 03 add $0x3,%eax
7: 38 d0 cmp %dl,%al
9: 7c 08 jl 0x13
b: 84 d2 test %dl,%dl
d: 0f 85 c6 33 00 00 jne 0x33d9
13: 8b 05 c6 33 cf 0e mov 0xecf33c6(%rip),%eax # 0xecf33df
19: 85 c0 test %eax,%eax
1b: 0f 84 3a 07 00 00 je 0x75b
21: 31 c0 xor %eax,%eax
23: e9 0f ff ff ff jmpq 0xffffff37
* 28: 4c 8b 64 24 58 mov 0x58(%rsp),%r12 <-- trapping instruction
2d: 40 38 6c 24 50 cmp %bpl,0x50(%rsp)
32: 76 0d jbe 0x41
34: e8 96 f0 7b 02 callq 0x27bf0cf
39: 85 c0 test %eax,%eax
3b: 0f .byte 0xf
3c: 85 .byte 0x85
3d: 60 (bad)