INFO: task syz-executor.5:20885 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:syz-executor.5 state:D stack:26608 pid:20885 ppid: 20070 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178
nbd_add_socket+0x166/0x810 drivers/block/nbd.c:1109
__nbd_ioctl drivers/block/nbd.c:1454 [inline]
nbd_ioctl+0x38c/0xb10 drivers/block/nbd.c:1511
blkdev_ioctl+0x37a/0x800 block/ioctl.c:609
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f52aa20cae9
RSP: 002b:00007f52a7782188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f52aa31ff60 RCX: 00007f52aa20cae9
RDX: 0000000000000006 RSI: 000000000000ab00 RDI: 0000000000000005
RBP: 00007f52aa266f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff6204d61f R14: 00007f52a7782300 R15: 0000000000022000
INFO: task syz-executor.5:20889 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:syz-executor.5 state:D stack:26344 pid:20889 ppid: 20070 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
nbd_ioctl+0x151/0xb10 drivers/block/nbd.c:1504
blkdev_ioctl+0x37a/0x800 block/ioctl.c:609
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f52aa20cae9
RSP: 002b:00007f52a7761188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f52aa320020 RCX: 00007f52aa20cae9
RDX: 0000000000000006 RSI: 000000000000ab00 RDI: 0000000000000005
RBP: 00007f52aa266f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff6204d61f R14: 00007f52a7761300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by in:imklog/6424:
#0: ffff88801c37e5f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by rs:main Q:Reg/6425:
1 lock held by syz-executor.5/20885:
#0: ffff8881470b9198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x151/0xb10 drivers/block/nbd.c:1504
1 lock held by syz-executor.5/20889:
#0: ffff8881470b9198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x151/0xb10 drivers/block/nbd.c:1504
=============================================
NMI backtrace for cpu 1
CPU: 1 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+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 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+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 20831 Comm: kworker/u4:14 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:arch_jump_entry_size+0x1/0x110 arch/x86/kernel/jump_label.c:21
Code: ee 0f b6 05 22 ec ea 0d ba d1 04 00 00 ee c3 cc cc cc cc cc cc cc cc cc cc 0f 0b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 <48> 89 fe b9 0e 00 00 00 48 ba 00 00 00 00 00 fc ff df 53 48 81 ec
RSP: 0018:ffffc900056afb18 EFLAGS: 00000297
RAX: fffffffff6615a1e RBX: ffffffff81bde072 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8b5c8650
RBP: ffffc900056afb58 R08: 0000000000000000 R09: ffffc900056afaa7
R10: fffff52000ad5f54 R11: 0000000000000000 R12: ffffffff8b5c8650
R13: ffffffff81bdddfa R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff288b79050 CR3: 000000000b88e000 CR4: 0000000000350ef0
Call Trace:
__jump_label_patch+0x7c/0x1b0 arch/x86/kernel/jump_label.c:45
arch_jump_label_transform_queue+0x63/0x100 arch/x86/kernel/jump_label.c:137
__jump_label_update+0x12e/0x400 kernel/jump_label.c:451
jump_label_update+0x1d5/0x430 kernel/jump_label.c:830
static_key_disable_cpuslocked+0x152/0x1b0 kernel/jump_label.c:207
static_key_disable+0x16/0x20 kernel/jump_label.c:215
toggle_allocation_gate mm/kfence/core.c:746 [inline]
toggle_allocation_gate+0x183/0x390 mm/kfence/core.c:724
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: ee out %al,(%dx)
1: 0f b6 05 22 ec ea 0d movzbl 0xdeaec22(%rip),%eax # 0xdeaec2a
8: ba d1 04 00 00 mov $0x4d1,%edx
d: ee out %al,(%dx)
e: c3 retq
f: cc int3
10: cc int3
11: cc int3
12: cc int3
13: cc int3
14: cc int3
15: cc int3
16: cc int3
17: cc int3
18: cc int3
19: 0f 0b ud2
1b: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
22: 00 00 00 00
26: 0f 1f 00 nopl (%rax)
29: 55 push %rbp
* 2a: 48 89 fe mov %rdi,%rsi <-- trapping instruction
2d: b9 0e 00 00 00 mov $0xe,%ecx
32: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
39: fc ff df
3c: 53 push %rbx
3d: 48 rex.W
3e: 81 .byte 0x81
3f: ec in (%dx),%al