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:24016 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:1371
lock_page include/linux/pagemap.h:747 [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:2399
kcompactd_do_work mm/compaction.c:2839 [inline]
kcompactd+0x937/0x2920 mm/compaction.c:2941
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:
3 locks held by kworker/1:1/25:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1d900 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
4 locks held by kworker/u5:0/46:
1 lock held by kswapd0/98:
1 lock held by kswapd1/99:
2 locks held by systemd-journal/2967:
1 lock held by systemd-udevd/2972:
2 locks held by systemd-timesyn/3058:
1 lock held by in:imklog/6207:
1 lock held by cron/6187:
1 lock held by syz-fuzzer/6492:
2 locks held by syz-fuzzer/6493:
1 lock held by syz-fuzzer/6499:
3 locks held by kworker/0:0/4848:
2 locks held by syz-executor.5/18004:
#0: ffff88806edb4b58 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
#0: ffff88806edb4b58 (mapping.invalidate_lock){++++}-{3:3}, at: page_cache_ra_unbounded+0x1b8/0x9f0 mm/readahead.c:194
#1: ffffffff8cbe1a28 (pcpu_drain_mutex){+.+.}-{3:3}, at: __drain_all_pages+0x58/0x690 mm/page_alloc.c:3181
1 lock held by syz-executor.2/19534:
=============================================
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+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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 10 Comm: kworker/u4:1 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:rcu_read_lock_any_held+0x0/0x150 kernel/rcu/update.c:341
Code: 65 48 8b 04 25 28 00 00 00 48 3b 44 24 48 75 10 44 89 f8 48 8d 65 e0 5b 41 5c 41 5e 41 5f 5d c3 e8 d5 65 93 08 0f 1f 44 00 00 <55> 48 89 e5 41 57 41 56 41 54 53 48 83 e4 e0 48 83 ec 60 65 48 8b
RSP: 0000:ffffc90000cf7b18 EFLAGS: 00000246
RAX: 1ffff1100240362b RBX: ffffffff90bf9000 RCX: ffffffff8a040000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff814e4bdc
RBP: ffffc90000cf7c50 R08: dffffc0000000000 R09: fffffbfff1feeddd
R10: fffffbfff1feeddd R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff9200019ef68 R14: 00000000000036b0 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcc1c92f303 CR3: 000000000c88e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_sync_is_idle include/linux/rcu_sync.h:34 [inline]
percpu_down_read include/linux/percpu-rwsem.h:62 [inline]
cpus_read_lock+0x51/0x130 kernel/cpu.c:308
static_key_disable+0xe/0x20 kernel/jump_label.c:214
toggle_allocation_gate+0x3c8/0x460 mm/kfence/core.c:746
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: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
7: 00 00
9: 48 3b 44 24 48 cmp 0x48(%rsp),%rax
e: 75 10 jne 0x20
10: 44 89 f8 mov %r15d,%eax
13: 48 8d 65 e0 lea -0x20(%rbp),%rsp
17: 5b pop %rbx
18: 41 5c pop %r12
1a: 41 5e pop %r14
1c: 41 5f pop %r15
1e: 5d pop %rbp
1f: c3 retq
20: e8 d5 65 93 08 callq 0x89365fa
25: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
* 2a: 55 push %rbp <-- trapping instruction
2b: 48 89 e5 mov %rsp,%rbp
2e: 41 57 push %r15
30: 41 56 push %r14
32: 41 54 push %r12
34: 53 push %rbx
35: 48 83 e4 e0 and $0xffffffffffffffe0,%rsp
39: 48 83 ec 60 sub $0x60,%rsp
3d: 65 gs
3e: 48 rex.W
3f: 8b .byte 0x8b