INFO: task syz-executor386:9130 blocked for more than 143 seconds.
Not tainted 5.17.0-syzkaller-13993-g88e6c0207623 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor386 state:D stack:27296 pid: 9130 ppid: 3605 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6382
schedule+0xd2/0x1f0 kernel/sched/core.c:6454
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x373/0x530 kernel/sched/completion.c:106
kthread_stop+0x17a/0x720 kernel/kthread.c:708
ext4_stop_mmpd+0x47/0xd0 fs/ext4/mmp.c:255
__ext4_fill_super fs/ext4/super.c:5538 [inline]
ext4_fill_super+0xa2f8/0xe6f0 fs/ext4/super.c:5587
get_tree_bdev+0x440/0x760 fs/super.c:1292
vfs_get_tree+0x89/0x2f0 fs/super.c:1497
do_new_mount fs/namespace.c:3040 [inline]
path_mount+0x1320/0x1fa0 fs/namespace.c:3370
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount fs/namespace.c:3568 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3568
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f0d9db36cba
RSP: 002b:00007ffc0e15ba18 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffc0e15ba70 RCX: 00007f0d9db36cba
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc0e15ba30
RBP: 00007ffc0e15ba30 R08: 00007ffc0e15ba70 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000200003f8
R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000005
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff8bd7f3e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6467
2 locks held by getty/3246:
#0: ffff888025fac098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90001c182e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcea/0x1230 drivers/tty/n_tty.c:2075
1 lock held by syz-executor386/9130:
#0: ffff88807e3120e0 (&type->s_umount_key#27/1){+.+.}-{3:3}, at: alloc_super+0x1dd/0xa80 fs/super.c:228
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 5.17.0-syzkaller-13993-g88e6c0207623 #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+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:369
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 31 Comm: kcompactd0 Not tainted 5.17.0-syzkaller-13993-g88e6c0207623 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:trace_pelt_cfs_tp include/trace/events/sched.h:694 [inline]
RIP: 0010:__update_load_avg_cfs_rq+0x362/0x920 kernel/sched/pelt.c:328
Code: 07 0f 87 fa 03 00 00 89 db be 08 00 00 00 48 89 d8 48 c1 f8 06 48 8d 3c c5 10 7b b6 8d e8 16 bd 6a 00 48 0f a3 1d 1e 56 5e 0c <0f> 82 7a 02 00 00 48 83 c4 20 b8 01 00 00 00 5b 5d 41 5c 41 5d 41
RSP: 0018:ffffc90000c8fa00 EFLAGS: 00000047
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff815824ea
RDX: fffffbfff1b6cf63 RSI: 0000000000000008 RDI: ffffffff8db67b10
RBP: ffff8880b9d3a100 R08: 0000000000000000 R09: ffffffff8db67b17
R10: fffffbfff1b6cf62 R11: ffff8880b9d3ac18 R12: 000000000043d800
R13: 000000000021ec00 R14: ffff8880b9d3a19c R15: 0000000000000002
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055abc9759600 CR3: 000000000ba8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
update_cfs_rq_load_avg kernel/sched/fair.c:3786 [inline]
update_load_avg+0x1bd/0x1c80 kernel/sched/fair.c:3901
dequeue_entity+0x33/0xfd0 kernel/sched/fair.c:4434
dequeue_task_fair+0x238/0xea0 kernel/sched/fair.c:5773
deactivate_task kernel/sched/core.c:2109 [inline]
__schedule+0xbe7/0x4940 kernel/sched/core.c:6336
schedule+0xd2/0x1f0 kernel/sched/core.c:6454
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
freezable_schedule_timeout include/linux/freezer.h:192 [inline]
kcompactd+0xa5d/0xf30 mm/compaction.c:2971
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.052 msecs
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 0f 87 fa 03 00 00 ja 0x400
6: 89 db mov %ebx,%ebx
8: be 08 00 00 00 mov $0x8,%esi
d: 48 89 d8 mov %rbx,%rax
10: 48 c1 f8 06 sar $0x6,%rax
14: 48 8d 3c c5 10 7b b6 lea -0x724984f0(,%rax,8),%rdi
1b: 8d
1c: e8 16 bd 6a 00 callq 0x6abd37
21: 48 0f a3 1d 1e 56 5e bt %rbx,0xc5e561e(%rip) # 0xc5e5647
28: 0c
* 29: 0f 82 7a 02 00 00 jb 0x2a9 <-- trapping instruction
2f: 48 83 c4 20 add $0x20,%rsp
33: b8 01 00 00 00 mov $0x1,%eax
38: 5b pop %rbx
39: 5d pop %rbp
3a: 41 5c pop %r12
3c: 41 5d pop %r13
3e: 41 rex.B