INFO: task syz-executor331:5120 blocked for more than 143 seconds.
Not tainted 6.2.0-rc2-syzkaller-00282-g0a71553536d2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor331 state:D stack:27336 pid:5120 ppid:5074 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x9d1/0xe40 kernel/sched/core.c:6555
schedule+0xcb/0x190 kernel/sched/core.c:6631
blk_mq_freeze_queue_wait+0x105/0x190 block/blk-mq.c:180
nbd_add_socket+0x17b/0x8e0 drivers/block/nbd.c:1122
__nbd_ioctl drivers/block/nbd.c:1465 [inline]
nbd_ioctl+0x1d5/0x5b0 drivers/block/nbd.c:1522
blkdev_ioctl+0x3c9/0x7c0 block/ioctl.c:616
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc84227c249
RSP: 002b:00007fc842229308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc842300408 RCX: 00007fc84227c249
RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003
RBP: 00007fc842300400 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc84230040c
R13: 00007fc8422cd1a4 R14: 64626e2f7665642f R15: 0000000000022000
INFO: task syz-executor331:5121 blocked for more than 143 seconds.
Not tainted 6.2.0-rc2-syzkaller-00282-g0a71553536d2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor331 state:D stack:28728 pid:5121 ppid:5074 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x9d1/0xe40 kernel/sched/core.c:6555
schedule+0xcb/0x190 kernel/sched/core.c:6631
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6690
__mutex_lock_common+0xecf/0x26c0 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
nbd_ioctl+0xd7/0x5b0 drivers/block/nbd.c:1515
blkdev_ioctl+0x3c9/0x7c0 block/ioctl.c:616
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc84227c249
RSP: 002b:00007fc842208308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc842300418 RCX: 00007fc84227c249
RDX: 00000000000007ff RSI: 000000000000ab07 RDI: 0000000000000003
RBP: 00007fc842300410 R08: 00007fc842208700 R09: 0000000000000000
R10: 00007fc842208700 R11: 0000000000000246 R12: 00007fc84230041c
R13: 00007fc8422cd1a4 R14: 64626e2f7665642f R15: 0000000000022000
INFO: task syz-executor331:5122 blocked for more than 143 seconds.
Not tainted 6.2.0-rc2-syzkaller-00282-g0a71553536d2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor331 state:D stack:28728 pid:5122 ppid:5074 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x9d1/0xe40 kernel/sched/core.c:6555
schedule+0xcb/0x190 kernel/sched/core.c:6631
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6690
__mutex_lock_common+0xecf/0x26c0 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
nbd_ioctl+0xd7/0x5b0 drivers/block/nbd.c:1515
blkdev_ioctl+0x3c9/0x7c0 block/ioctl.c:616
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc84227c249
RSP: 002b:00007fc8421e7308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc842300428 RCX: 00007fc84227c249
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007fc842300420 R08: 00007fc8421e7700 R09: 0000000000000000
R10: 00007fc8421e7700 R11: 0000000000000246 R12: 00007fc84230042c
R13: 00007fc8422cd1a4 R14: 64626e2f7665642f R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d5239d0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d5241d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8d523800 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4734:
#0: ffff888028781098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2177
1 lock held by syz-executor331/5120:
#0: ffff88801ef059a0 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0xd7/0x5b0 drivers/block/nbd.c:1515
1 lock held by syz-executor331/5121:
#0: ffff88801ef059a0 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0xd7/0x5b0 drivers/block/nbd.c:1515
1 lock held by syz-executor331/5122:
#0: ffff88801ef059a0 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0xd7/0x5b0 drivers/block/nbd.c:1515
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc2-syzkaller-00282-g0a71553536d2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e3/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x19b/0x3e0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xcd5/0xd20 kernel/hung_task.c:377
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
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 acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_idle_do_entry drivers/acpi/processor_idle.c:570 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_idle_enter+0x43d/0x800 drivers/acpi/processor_idle.c:707