INFO: task syz-executor.3:18119 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.3 state:D stack:26736 pid:18119 ppid: 10739 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:1109
__nbd_ioctl drivers/block/nbd.c:1454 [inline]
nbd_ioctl+0x263/0xb80 drivers/block/nbd.c:1511
blkdev_ioctl+0x3ac/0x790 block/ioctl.c:609
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: 0033:0x7f1fe7b43ae9
RSP: 002b:00007f1fe50b9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1fe7c56f60 RCX: 00007f1fe7b43ae9
RDX: 0000000000000005 RSI: 000000000000ab00 RDI: 0000000000000004
RBP: 00007f1fe7b9df6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff1fc033cf R14: 00007f1fe50b9300 R15: 0000000000022000
INFO: task syz-executor.3:18122 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.3 state:D stack:28688 pid:18122 ppid: 10739 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:1504
blkdev_ioctl+0x3ac/0x790 block/ioctl.c:609
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: 0033:0x7f1fe7b43ae9
RSP: 002b:00007f1fe5098188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1fe7c57020 RCX: 00007f1fe7b43ae9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000004
RBP: 00007f1fe7b9df6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff1fc033cf R14: 00007f1fe5098300 R15: 0000000000022000
INFO: task syz-executor.3:18157 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.3 state:D stack:27344 pid:18157 ppid: 10739 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:1504
blkdev_ioctl+0x3ac/0x790 block/ioctl.c:609
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: 0033:0x7f1fe7b43ae9
RSP: 002b:00007f1fe5056188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1fe7c571a0 RCX: 00007f1fe7b43ae9
RDX: 0000000000000005 RSI: 000000000000ab00 RDI: 0000000000000004
RBP: 00007f1fe7b9df6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff1fc033cf R14: 00007f1fe5056300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8cd1da00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by in:imklog/6198:
#0: ffff888071f6cd70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990
2 locks held by agetty/6233:
#0: ffff88807e0ca098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002f332e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.3/18119:
#0: ffff88801b89c998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x148/0xb80 drivers/block/nbd.c:1504
1 lock held by syz-executor.3/18122:
#0: ffff88801b89c998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x148/0xb80 drivers/block/nbd.c:1504
1 lock held by syz-executor.3/18157:
#0: ffff88801b89c998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x148/0xb80 drivers/block/nbd.c:1504
=============================================
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: 2964 Comm: systemd-journal Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:walk_component+0x10b/0x790 fs/namei.c:1966
Code: ee 03 43 8a 04 2e 84 c0 0f 85 49 05 00 00 41 8b 1f 31 ff 89 de e8 25 fc a4 ff 85 db 0f 85 83 02 00 00 4c 89 e2 4c 8b 64 24 18 <4c> 89 e7 4c 8d 7c 24 60 4c 89 fe e8 a5 1b 00 00 49 89 c6 48 3d 01
RSP: 0018:ffffc9000ada7680 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000ada7703
RDX: ffffc9000ada7700 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000ada7770 R08: ffffffff81df7cbb R09: ffffffff81df2823
R10: 0000000000000002 R11: ffff88807b04d700 R12: ffffc9000ada7bc0
R13: dffffc0000000000 R14: 1ffff920015b4f81 R15: ffffc9000ada7c0c
FS: 00007fe586eee8c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe584468000 CR3: 000000001a791000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
link_path_walk+0x697/0xd00
path_openat+0x25b/0x3660 fs/namei.c:3555
do_filp_open+0x277/0x4f0 fs/namei.c:3586
do_sys_openat2+0x13b/0x500 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_sys_open fs/open.c:1236 [inline]
__se_sys_open fs/open.c:1232 [inline]
__x64_sys_open+0x221/0x270 fs/open.c:1232
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: 0033:0x7fe58647d840
Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24
RSP: 002b:00007fff37657808 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fff37657b10 RCX: 00007fe58647d840
RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055904d0a9f50
RBP: 000000000000000d R08: 00000000000001c0 R09: 00000000ffffffff
R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000055904d09c040 R14: 00007fff37657ad0 R15: 000055904d0a9d70
----------------
Code disassembly (best guess):
0: ee out %al,(%dx)
1: 03 43 8a add -0x76(%rbx),%eax
4: 04 2e add $0x2e,%al
6: 84 c0 test %al,%al
8: 0f 85 49 05 00 00 jne 0x557
e: 41 8b 1f mov (%r15),%ebx
11: 31 ff xor %edi,%edi
13: 89 de mov %ebx,%esi
15: e8 25 fc a4 ff callq 0xffa4fc3f
1a: 85 db test %ebx,%ebx
1c: 0f 85 83 02 00 00 jne 0x2a5
22: 4c 89 e2 mov %r12,%rdx
25: 4c 8b 64 24 18 mov 0x18(%rsp),%r12
* 2a: 4c 89 e7 mov %r12,%rdi <-- trapping instruction
2d: 4c 8d 7c 24 60 lea 0x60(%rsp),%r15
32: 4c 89 fe mov %r15,%rsi
35: e8 a5 1b 00 00 callq 0x1bdf
3a: 49 89 c6 mov %rax,%r14
3d: 48 rex.W
3e: 3d .byte 0x3d
3f: 01 .byte 0x1