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:24792 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 khungtaskd/27:
#0: ffffffff8cd1db00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by khugepaged/33:
#0: ffffffff8cdb6408 (lock#5){+.+.}-{3:3}, at: __lru_add_drain_all+0x67/0x9d0 mm/swap.c:797
1 lock held by kswapd0/98:
1 lock held by kswapd1/99:
1 lock held by systemd-journal/2956:
1 lock held by in:imklog/6205:
#0: ffff88801f4b4870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990
4 locks held by rs:main Q:Reg/6207:
#0: ffff88801d9b1270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990
#1: ffff88807e884460 (sb_writers#5){.+.+}-{0:0}, at: vfs_write+0x2b5/0xe90 fs/read_write.c:586
#2: ffff888078e32bd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:783 [inline]
#2: ffff888078e32bd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x520 fs/ext4/file.c:263
#3: ffffffff8cde1360 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline]
#3: ffffffff8cde1360 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline]
#3: ffffffff8cde1360 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0x10fe/0x2530 mm/page_alloc.c:5007
2 locks held by syz-fuzzer/6497:
#0: ffff888071a76940 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
#0: ffff888071a76940 (mapping.invalidate_lock){++++}-{3:3}, at: page_cache_ra_unbounded+0x1b8/0x9f0 mm/readahead.c:194
#1: ffffffff8cde1ba8 (pcpu_drain_mutex){+.+.}-{3:3}, at: __drain_all_pages+0x58/0x690 mm/page_alloc.c:3181
1 lock held by syz-fuzzer/6500:
3 locks held by kworker/0:6/8328:
3 locks held by kworker/1:8/8507:
3 locks held by kworker/u4:0/5064:
1 lock held by syz-executor.0/7965:
=============================================
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: 6461 Comm: kworker/u4:6 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:rcu_read_lock_sched_held+0x33/0x130 kernel/rcu/update.c:120
Code: 54 53 48 83 e4 e0 48 83 ec 60 65 48 8b 04 25 28 00 00 00 48 89 44 24 48 49 be 00 00 00 00 00 fc ff df 48 c7 04 24 b3 8a b5 41 <48> c7 44 24 08 e0 f6 5c 8c 48 c7 44 24 10 10 07 6e 81 48 89 e3 48
RSP: 0018:ffffc900027bf9a0 EFLAGS: 00000286
RAX: 58b954bf6d503e00 RBX: 0000000000000001 RCX: ffffffff8165db6b
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8e1e90a8
RBP: ffffc900027bfa28 R08: dffffc0000000000 R09: fffffbfff1c3d216
R10: fffffbfff1c3d216 R11: 0000000000000000 R12: 0000000000000002
R13: 1ffff920004f7f58 R14: dffffc0000000000 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000016e0f08 CR3: 000000000ca8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_lock_acquire+0x59/0x190 include/trace/events/lock.h:13
lock_acquire+0xa5/0x4d0 kernel/locking/lockdep.c:5608
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: 54 push %rsp
1: 53 push %rbx
2: 48 83 e4 e0 and $0xffffffffffffffe0,%rsp
6: 48 83 ec 60 sub $0x60,%rsp
a: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
11: 00 00
13: 48 89 44 24 48 mov %rax,0x48(%rsp)
18: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14
1f: fc ff df
22: 48 c7 04 24 b3 8a b5 movq $0x41b58ab3,(%rsp)
29: 41
* 2a: 48 c7 44 24 08 e0 f6 movq $0xffffffff8c5cf6e0,0x8(%rsp) <-- trapping instruction
31: 5c 8c
33: 48 c7 44 24 10 10 07 movq $0xffffffff816e0710,0x10(%rsp)
3a: 6e 81
3c: 48 89 e3 mov %rsp,%rbx
3f: 48 rex.W