INFO: task kcompactd0:31 blocked for more than 143 seconds.
Not tainted 6.2.0-syzkaller-12018-g2fcd07b7ccd5 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kcompactd0 state:D stack:25120 pid:31 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0x17d8/0x4990 kernel/sched/core.c:6622
schedule+0xc3/0x180 kernel/sched/core.c:6698
io_schedule+0x8c/0x100 kernel/sched/core.c:8884
folio_wait_bit_common+0x86c/0x12b0 mm/filemap.c:1301
migrate_folio_unmap mm/migrate.c:1171 [inline]
migrate_pages_batch mm/migrate.c:1685 [inline]
migrate_pages+0x2aa0/0x6610 mm/migrate.c:1973
compact_zone+0x2bc9/0x45a0 mm/compaction.c:2420
proactive_compact_node mm/compaction.c:2685 [inline]
kcompactd+0x1165/0x1e80 mm/compaction.c:2993
kthread+0x270/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d127c70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d128470 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
#0: ffffffff8d127aa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4746:
#0: ffff88802c4c3098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177
1 lock held by syz-executor.4/5124:
#0: ffffffff8d12d178 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#0: ffffffff8d12d178 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:989
2 locks held by kworker/0:4/5167:
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x77f/0x13a0
#1: ffffc90004567d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7c6/0x13a0 kernel/workqueue.c:2365
3 locks held by kworker/1:20/6702:
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77f/0x13a0
#1: ffffc9000481fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c6/0x13a0 kernel/workqueue.c:2365
#2: ffffffff8d12d178 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
#2: ffffffff8d12d178 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:989
1 lock held by syz-executor.5/15280:
2 locks held by syz-executor.3/17271:
2 locks held by syz-executor.5/17272:
1 lock held by syz-executor.0/17270:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-syzkaller-12018-g2fcd07b7ccd5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e5/0x560 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x1b4/0x410 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0x1024/0x1070 kernel/hung_task.c:379
kthread+0x270/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5730 Comm: syz-fuzzer Not tainted 6.2.0-syzkaller-12018-g2fcd07b7ccd5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
RIP: 0033:0x4664b6
Code: fe ff ff c5 fd ef c0 48 81 fb 00 00 00 02 73 46 c5 fe 7f 07 c5 fe 7f 47 20 c5 fe 7f 47 40 c5 fe 7f 47 60 48 81 eb 80 00 00 00 <48> 81 c7 80 00 00 00 48 81 fb 80 00 00 00 73 d6 c5 fe 7f 44 1f e0
RSP: 002b:000000c000c85370 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000025080 RCX: 0000000000026000
RDX: 0000000000000001 RSI: 0000000000040000 RDI: 000000c01c100f00
RBP: 000000c000c85398 R08: 0000000000000020 R09: 0000000000000000
R10: 000000000000005e R11: 0000000000000001 R12: 8ff7da18fe3ca503
R13: 0000000000000000 R14: 000000c000448000 R15: 0000000000000000
FS: 000000c027c50490 GS: 0000000000000000