INFO: task syz-executor.1:7682 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:25392 pid: 7682 ppid: 6476 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6250
schedule+0x12b/0x1f0 kernel/sched/core.c:6323
blk_mq_freeze_queue_wait+0x105/0x190 block/blk-mq.c:178
nbd_add_socket+0x17b/0x8e0 drivers/block/nbd.c:1107
__nbd_ioctl drivers/block/nbd.c:1464 [inline]
nbd_ioctl+0x263/0xb80 drivers/block/nbd.c:1521
blkdev_ioctl+0x3ac/0x790 block/ioctl.c:597
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7b7ceaeae9
RSP: 002b:00007f7b7a424188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7b7cfc1f60 RCX: 00007f7b7ceaeae9
RDX: 0000000000000007 RSI: 000000000000ab00 RDI: 0000000000000003
RBP: 00007f7b7cf08f25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe564d3ecf R14: 00007f7b7a424300 R15: 0000000000022000
INFO: task syz-executor.1:7691 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:25232 pid: 7691 ppid: 6476 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6250
schedule+0x12b/0x1f0 kernel/sched/core.c:6323
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6382
__mutex_lock_common+0xd1f/0x2590 kernel/locking/mutex.c:680
__mutex_lock kernel/locking/mutex.c:740 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:792
nbd_ioctl+0x148/0xb80 drivers/block/nbd.c:1514
blkdev_ioctl+0x3ac/0x790 block/ioctl.c:597
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7b7ceaeae9
RSP: 002b:00007f7b7a3e2188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7b7cfc20e0 RCX: 00007f7b7ceaeae9
RDX: 0000000000000006 RSI: 000000000000ab00 RDI: 0000000000000003
RBP: 00007f7b7cf08f25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe564d3ecf R14: 00007f7b7a3e2300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1d8c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by in:imklog/6122:
1 lock held by syz-executor.1/7682:
#0: ffff88801b572198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x148/0xb80 drivers/block/nbd.c:1514
1 lock held by syz-executor.1/7691:
#0: ffff88801b572198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x148/0xb80 drivers/block/nbd.c:1514
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-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: 949 Comm: kworker/u4:4 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__this_cpu_preempt_check+0x1/0x20 lib/smp_processor_id.c:65
Code: c0 e8 eb 75 69 f7 48 8b 74 24 40 48 c7 c7 00 97 d4 8a 31 c0 e8 d8 75 69 f7 e8 45 5d 38 fa eb 96 e8 84 eb ff ff 0f 1f 40 00 53 <48> 89 fb 0f 1f 44 00 00 48 c7 c7 60 96 d4 8a 48 89 de 5b e9 27 fe
RSP: 0018:ffffc9000473f808 EFLAGS: 00000046
RAX: 0000000000000003 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff8cb1d820 RDI: ffffffff8a6f1340
RBP: 0000000000000003 R08: dffffc0000000000 R09: ffffc9000473fa40
R10: fffff520008e7f4d R11: 0000000000000000 R12: 0000000000000246
R13: ffff88801c438000 R14: 00000000ffffffff R15: ffffffff8cb1d820
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8331e3c000 CR3: 000000000c88e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_finish kernel/locking/lockdep.c:438 [inline]
lock_is_held_type+0x109/0x190 kernel/locking/lockdep.c:5669
lock_is_held include/linux/lockdep.h:283 [inline]
__might_resched+0xdc/0x790 kernel/sched/core.c:9501
__mutex_lock_common+0xd2/0x2590 kernel/locking/mutex.c:584
__mutex_lock kernel/locking/mutex.c:740 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:792
jump_label_lock kernel/jump_label.c:27 [inline]
static_key_disable_cpuslocked+0x99/0x1b0 kernel/jump_label.c:205
static_key_disable+0x16/0x20 kernel/jump_label.c:215
toggle_allocation_gate+0x3c8/0x460 mm/kfence/core.c:640
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: c0 e8 eb shr $0xeb,%al
3: 75 69 jne 0x6e
5: f7 48 8b 74 24 40 48 testl $0x48402474,-0x75(%rax)
c: c7 c7 00 97 d4 8a mov $0x8ad49700,%edi
12: 31 c0 xor %eax,%eax
14: e8 d8 75 69 f7 callq 0xf76975f1
19: e8 45 5d 38 fa callq 0xfa385d63
1e: eb 96 jmp 0xffffffb6
20: e8 84 eb ff ff callq 0xffffeba9
25: 0f 1f 40 00 nopl 0x0(%rax)
29: 53 push %rbx
* 2a: 48 89 fb mov %rdi,%rbx <-- trapping instruction
2d: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
32: 48 c7 c7 60 96 d4 8a mov $0xffffffff8ad49660,%rdi
39: 48 89 de mov %rbx,%rsi
3c: 5b pop %rbx
3d: e9 .byte 0xe9
3e: 27 (bad)
3f: fe .byte 0xfe