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:25008 pid: 30 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6250
schedule+0x12b/0x1f0 kernel/sched/core.c:6323
io_schedule+0x83/0x100 kernel/sched/core.c:8368
folio_wait_bit_common+0x8aa/0xe00 mm/filemap.c:1356
lock_page include/linux/pagemap.h:697 [inline]
__unmap_and_move+0x9d9/0xda0 mm/migrate.c:986
unmap_and_move+0x321/0xd70 mm/migrate.c:1210
migrate_pages+0x562/0x16f0 mm/migrate.c:1487
compact_zone+0x2d23/0x3d10 mm/compaction.c:2393
kcompactd_do_work mm/compaction.c:2833 [inline]
kcompactd+0x937/0x2920 mm/compaction.c:2935
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Showing all locks held in the system:
1 lock held by systemd/1:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1d880 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by khugepaged/33:
#0: ffffffff8cbb5e08 (lock#5){+.+.}-{3:3}, at: __lru_add_drain_all+0x67/0x9d0 mm/swap.c:788
6 locks held by kworker/u4:3/56:
1 lock held by kswapd0/98:
1 lock held by kswapd1/99:
3 locks held by kworker/0:2/1434:
3 locks held by kworker/u4:7/2414:
1 lock held by systemd-journal/2934:
1 lock held by systemd-udevd/2938:
2 locks held by systemd-timesyn/3025:
2 locks held by cron/6106:
2 locks held by in:imklog/6158:
2 locks held by agetty/6156:
#0: ffff88801dd8d098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900028dc2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2113
2 locks held by syz-fuzzer/6463:
2 locks held by syz-fuzzer/6466:
3 locks held by kworker/1:0/17121:
2 locks held by syz-executor.5/18877:
#0: ffff888145a42cc8 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
#0: ffff888145a42cc8 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: page_cache_ra_unbounded+0x1ab/0x9b0 mm/readahead.c:194
#1: ffffffff8cbe1048 (pcpu_drain_mutex){+.+.}-{3:3}, at: __drain_all_pages+0x58/0x690 mm/page_alloc.c:3189
=============================================
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+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x16a/0x280 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+0xc82/0xcd0 kernel/hung_task.c:295
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 56 Comm: kworker/u4:3 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__lock_acquire+0x1/0x2b00 kernel/locking/lockdep.c:4873
Code: 0d 0c bc 9c 7e 0f 85 9e fe ff ff 0f 1f 44 00 00 e9 94 fe ff ff 0f 0b e9 54 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 20 01 00
RSP: 0018:ffffc90001a2f5f0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffc90001a2f6a0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880b9a27888
RBP: ffffc90001a2f770 R08: 0000000000000001 R09: 0000000000000001
R10: fffffbfff1bf9dae R11: 0000000000000000 R12: 0000000000000046
R13: 1ffff92000345ecc R14: 0000000000000000 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5873fce028 CR3: 000000000c88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
do_write_seqcount_begin_nested include/linux/seqlock.h:520 [inline]
do_write_seqcount_begin include/linux/seqlock.h:545 [inline]
psi_group_change+0x13e/0x1000 kernel/sched/psi.c:703
psi_task_switch+0x4c1/0x780 kernel/sched/psi.c:880
psi_sched_switch kernel/sched/stats.h:189 [inline]
__schedule+0x1290/0x1460 kernel/sched/core.c:6245
schedule+0x12b/0x1f0 kernel/sched/core.c:6323
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1881
toggle_allocation_gate+0x218/0x460 mm/kfence/core.c:633
process_one_work+0x853/0x1140 kernel/workqueue.c:2298
worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: 0d 0c bc 9c 7e or $0x7e9cbc0c,%eax
5: 0f 85 9e fe ff ff jne 0xfffffea9
b: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
10: e9 94 fe ff ff jmpq 0xfffffea9
15: 0f 0b ud2
17: e9 54 ff ff ff jmpq 0xffffff70
1c: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
23: 00 00 00
26: 0f 1f 00 nopl (%rax)
29: 55 push %rbp
* 2a: 48 89 e5 mov %rsp,%rbp <-- trapping instruction
2d: 41 57 push %r15
2f: 41 56 push %r14
31: 41 55 push %r13
33: 41 54 push %r12
35: 53 push %rbx
36: 48 83 e4 e0 and $0xffffffffffffffe0,%rsp
3a: 48 rex.W
3b: 81 .byte 0x81
3c: ec in (%dx),%al
3d: 20 01 and %al,(%rcx)