INFO: task hung in nbd_add_socket

From: Hao Sun
Date: Fri Sep 17 2021 - 21:33:22 EST

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Previous message: Jakub Kicinski: "Re: [PATCH net-next] net: socket: add the case sock_no_xxx support"
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Hello,

When using Healer to fuzz the latest Linux kernel, the following crash
was triggered.

HEAD commit: ff1ffd71d5f0 Merge tag 'hyperv-fixes-signed-20210915
git tree: upstream
console output:
https://drive.google.com/file/d/1uDfJnwful_fOzqNVRIHEf7PqIsqZDcvG/view?usp=sharing
kernel config: https://drive.google.com/file/d/1zXpDhs-IdE7tX17B7MhaYP0VGUfP6m9B/view?usp=sharing

Sorry, I don't have a reproducer for this crash, hope the symbolized
report can help.
If you fix this issue, please add the following tag to the commit:
Reported-by: Hao Sun <sunhao.th@xxxxxxxxx>

INFO: task syz-executor:15349 blocked for more than 143 seconds.
Not tainted 5.15.0-rc1+ #6
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:28400 pid:15349 ppid: 14720 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xcd9/0x2530 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
blk_mq_freeze_queue_wait+0x114/0x160 block/blk-mq.c:151
nbd_add_socket+0x102/0x7c0 drivers/block/nbd.c:1050
__nbd_ioctl drivers/block/nbd.c:1405 [inline]
nbd_ioctl+0x391/0x9c0 drivers/block/nbd.c:1462
blkdev_ioctl+0x2a4/0x720 block/ioctl.c:589
block_ioctl+0xfa/0x140 block/fops.c:477
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: 0033:0x4739cd
RSP: 002b:00007fb9db27fc58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000059c0a0 RCX: 00000000004739cd
RDX: 0000000000000006 RSI: 000000000000ab00 RDI: 0000000000000008
RBP: 00000000004ebd80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000059c0a0
R13: 00007ffd4c2267df R14: 00007ffd4c226980 R15: 00007fb9db27fdc0
INFO: task syz-executor:15350 blocked for more than 143 seconds.
Not tainted 5.15.0-rc1+ #6
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:28400 pid:15350 ppid: 14720 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xcd9/0x2530 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xc96/0x1680 kernel/locking/mutex.c:729
nbd_ioctl+0x14f/0x9c0 drivers/block/nbd.c:1455
blkdev_ioctl+0x2a4/0x720 block/ioctl.c:589
block_ioctl+0xfa/0x140 block/fops.c:477
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: 0033:0x4739cd
RSP: 002b:00007fb9db25ec58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000059c158 RCX: 00000000004739cd
RDX: 0000000000000006 RSI: 000000000000ab00 RDI: 0000000000000004
RBP: 00000000004ebd80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000059c158
R13: 00007ffd4c2267df R14: 00007ffd4c226980 R15: 00007fb9db25edc0
INFO: task syz-executor:15351 blocked for more than 143 seconds.
Not tainted 5.15.0-rc1+ #6
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:29552 pid:15351 ppid: 14720 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xcd9/0x2530 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xc96/0x1680 kernel/locking/mutex.c:729
nbd_ioctl+0x14f/0x9c0 drivers/block/nbd.c:1455
blkdev_ioctl+0x2a4/0x720 block/ioctl.c:589
block_ioctl+0xfa/0x140 block/fops.c:477
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: 0033:0x4739cd
RSP: 002b:00007fb9db23dc58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000059c210 RCX: 00000000004739cd
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000009
RBP: 00000000004ebd80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000059c210
R13: 00007ffd4c2267df R14: 00007ffd4c226980 R15: 00007fb9db23ddc0
INFO: task syz-executor:15352 blocked for more than 143 seconds.
Not tainted 5.15.0-rc1+ #6
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:28400 pid:15352 ppid: 14720 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xcd9/0x2530 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xc96/0x1680 kernel/locking/mutex.c:729
nbd_ioctl+0x14f/0x9c0 drivers/block/nbd.c:1455
blkdev_ioctl+0x2a4/0x720 block/ioctl.c:589
block_ioctl+0xfa/0x140 block/fops.c:477
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: 0033:0x4739cd
RSP: 002b:00007fb9db21cc58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000059c2c8 RCX: 00000000004739cd
RDX: 00000000000003ff RSI: 000000000000ab0a RDI: 0000000000000003
RBP: 00000000004ebd80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000059c2c8
R13: 00007ffd4c2267df R14: 00007ffd4c226980 R15: 00007fb9db21cdc0
INFO: task syz-executor:15353 blocked for more than 143 seconds.
Not tainted 5.15.0-rc1+ #6
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:28400 pid:15353 ppid: 14720 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xcd9/0x2530 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xc96/0x1680 kernel/locking/mutex.c:729
nbd_ioctl+0x14f/0x9c0 drivers/block/nbd.c:1455
blkdev_ioctl+0x2a4/0x720 block/ioctl.c:589
block_ioctl+0xfa/0x140 block/fops.c:477
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: 0033:0x4739cd
RSP: 002b:00007fb9db1fbc58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000059c380 RCX: 00000000004739cd
RDX: 0000000000000005 RSI: 000000000000ab00 RDI: 0000000000000007
RBP: 00000000004ebd80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000059c380
R13: 00007ffd4c2267df R14: 00007ffd4c226980 R15: 00007fb9db1fbdc0
INFO: task syz-executor:15354 blocked for more than 143 seconds.
Not tainted 5.15.0-rc1+ #6
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:28400 pid:15354 ppid: 14720 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xcd9/0x2530 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xc96/0x1680 kernel/locking/mutex.c:729
nbd_ioctl+0x14f/0x9c0 drivers/block/nbd.c:1455
blkdev_ioctl+0x2a4/0x720 block/ioctl.c:589
block_ioctl+0xfa/0x140 block/fops.c:477
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: 0033:0x4739cd
RSP: 002b:00007fb9db1dac58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000059c438 RCX: 00000000004739cd
RDX: 0000000000000005 RSI: 000000000000ab00 RDI: 0000000000000004
RBP: 00000000004ebd80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000059c438
R13: 00007ffd4c2267df R14: 00007ffd4c226980 R15: 00007fb9db1dadc0
INFO: task syz-executor:15355 blocked for more than 143 seconds.
Not tainted 5.15.0-rc1+ #6
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:29336 pid:15355 ppid: 14720 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xcd9/0x2530 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xc96/0x1680 kernel/locking/mutex.c:729
nbd_ioctl+0x14f/0x9c0 drivers/block/nbd.c:1455
blkdev_ioctl+0x2a4/0x720 block/ioctl.c:589
block_ioctl+0xfa/0x140 block/fops.c:477
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: 0033:0x4739cd
RSP: 002b:00007fb9db1b9c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000059c4f0 RCX: 00000000004739cd
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000008
RBP: 00000000004ebd80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000059c4f0
R13: 00007ffd4c2267df R14: 00007ffd4c226980 R15: 00007fb9db1b9dc0
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 39 Comm: khungtaskd Not tainted 5.15.0-rc1+ #6
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.13.0-1ubuntu1.1 04/01/2014
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:105
nmi_trigger_cpumask_backtrace+0x1e1/0x220 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+0xcc8/0x1010 kernel/hung_task.c:295
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0,2-3:
NMI backtrace for cpu 3
CPU: 3 PID: 3026 Comm: systemd-journal Not tainted 5.15.0-rc1+ #6
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.13.0-1ubuntu1.1 04/01/2014
RIP: 0033:0x5654ffc2727b
Code: e4 48 83 bb 98 00 00 00 00 74 24 48 8b 55 d8 64 48 33 14 25 28
00 00 00 44 89 e0 0f 85 ec 03 00 00 48 8d 65 e0 5b 41 5c 41 5d <41> 5e
5d c3 90 83 bb 24 02 00 00 03 74 d3 4c 8b ab f0 00 00 00 4d
RSP: 002b:00007ffd23734c48 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007ffd23737b30 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffd23737bd0
RBP: 00007ffd23734c50 R08: 00005654ffc273e5 R09: 0000000000000018
R10: 0000000000000069 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000009 R14: 00005655006498a0 R15: 00007ffd23735140
FS: 00007fdcd6b8d8c0 GS: 0000000000000000
NMI backtrace for cpu 0 skipped: idling at native_safe_halt
arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt
arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at default_idle+0xb/0x10
arch/x86/kernel/process.c:716
NMI backtrace for cpu 2 skipped: idling at native_safe_halt
arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 2 skipped: idling at arch_safe_halt
arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 2 skipped: idling at default_idle+0xb/0x10
arch/x86/kernel/process.c:716

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Previous message: Jakub Kicinski: "Re: [PATCH net-next] net: socket: add the case sock_no_xxx support"
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