INFO: task kcompactd0:30 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kcompactd0 state:D stack:23896 pid: 30 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6253
schedule+0x12b/0x1f0 kernel/sched/core.c:6326
io_schedule+0x83/0x100 kernel/sched/core.c:8371
folio_wait_bit_common+0x8aa/0xe00 mm/filemap.c:1371
lock_page include/linux/pagemap.h:780 [inline]
__unmap_and_move+0x9d9/0xda0 mm/migrate.c:980
unmap_and_move+0x321/0xd70 mm/migrate.c:1204
migrate_pages+0x562/0x16f0 mm/migrate.c:1481
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:
1 lock held by khungtaskd/27:
#0: ffffffff8cd1da80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
3 locks held by kworker/1:1H/50:
#0: ffff888011865138 ((wq_completion)events_highpri){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc900012afd20 ((work_completion)(&(&krcp->page_cache_work)->work)){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273
#2: ffffffff8cde1b28 (pcpu_drain_mutex){+.+.}-{3:3}, at: __drain_all_pages+0x58/0x690 mm/page_alloc.c:3181
1 lock held by kswapd0/98:
1 lock held by kswapd1/99:
3 locks held by kworker/u4:5/1308:
1 lock held by systemd-journal/2968:
1 lock held by systemd-udevd/2970:
1 lock held by systemd-timesyn/3057:
1 lock held by cron/6150:
1 lock held by in:imklog/6188:
#0: ffff88801b7e4b58 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
#0: ffff88801b7e4b58 (mapping.invalidate_lock){++++}-{3:3}, at: page_cache_ra_unbounded+0x1b8/0x9f0 mm/readahead.c:194
2 locks held by syz-fuzzer/6506:
3 locks held by kworker/0:1/27463:
2 locks held by syz-executor.5/7869:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc1-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: 1308 Comm: kworker/u4:5 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:hlock_class kernel/locking/lockdep.c:194 [inline]
RIP: 0010:__lock_acquire+0x12ca/0x2b00 kernel/locking/lockdep.c:5024
Code: 80 3c 38 00 74 12 4c 89 f7 e8 22 53 6a 00 48 bf 00 00 00 00 00 fc ff df 49 83 3e 00 0f 84 b2 0b 00 00 48 8b 44 24 38 8a 04 38 <84> c0 0f 85 2b 12 00 00 48 8b 44 24 20 8b 18 81 e3 ff 1f 00 00 48
RSP: 0018:ffffc90005a5f900 EFLAGS: 00000082
RAX: 1ffff11003c1e100 RBX: 00000000000006c2 RCX: ffffffff8165ed20
RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000
RBP: ffffc90005a5fa50 R08: dffffc0000000000 R09: fffffbfff2034df8
R10: fffffbfff2034df8 R11: 0000000000000000 R12: ffff88801e0f0000
R13: ffff88801e0f0ab0 R14: ffffffff8fb3ecc0 R15: 6cd58071d8f2d0c6
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f05eb895303 CR3: 000000000ca8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5637
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:268
rcu_read_lock include/linux/rcupdate.h:688 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0xc8/0x5b0 net/batman-adv/network-coding.c:723
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: 80 3c 38 00 cmpb $0x0,(%rax,%rdi,1)
4: 74 12 je 0x18
6: 4c 89 f7 mov %r14,%rdi
9: e8 22 53 6a 00 callq 0x6a5330
e: 48 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%rdi
15: fc ff df
18: 49 83 3e 00 cmpq $0x0,(%r14)
1c: 0f 84 b2 0b 00 00 je 0xbd4
22: 48 8b 44 24 38 mov 0x38(%rsp),%rax
27: 8a 04 38 mov (%rax,%rdi,1),%al
* 2a: 84 c0 test %al,%al <-- trapping instruction
2c: 0f 85 2b 12 00 00 jne 0x125d
32: 48 8b 44 24 20 mov 0x20(%rsp),%rax
37: 8b 18 mov (%rax),%ebx
39: 81 e3 ff 1f 00 00 and $0x1fff,%ebx
3f: 48 rex.W