INFO: task syz-executor294:3648 blocked for more than 143 seconds.
Not tainted 6.0.0-rc1-syzkaller-00160-g4c2d0b039c5c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor294 state:D stack:26432 pid: 3648 ppid: 3635 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x957/0xe20 kernel/sched/core.c:6494
schedule+0xcb/0x190 kernel/sched/core.c:6570
blk_mq_freeze_queue_wait+0x105/0x190 block/blk-mq.c:180
nbd_add_socket+0x17b/0x8e0 drivers/block/nbd.c:1123
__nbd_ioctl drivers/block/nbd.c:1464 [inline]
nbd_ioctl+0x260/0xa40 drivers/block/nbd.c:1521
blkdev_ioctl+0x3a6/0x760 block/ioctl.c:614
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: 0033:0x7f16d302bee9
RSP: 002b:00007f16d2fd9308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f16d30af408 RCX: 00007f16d302bee9
RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003
RBP: 00007f16d30af400 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f16d30af40c
R13: 00007f16d307d074 R14: 64626e2f7665642f R15: 0000000000022000
INFO: task syz-executor294:3649 blocked for more than 143 seconds.
Not tainted 6.0.0-rc1-syzkaller-00160-g4c2d0b039c5c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor294 state:D stack:28576 pid: 3649 ppid: 3635 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x957/0xe20 kernel/sched/core.c:6494
schedule+0xcb/0x190 kernel/sched/core.c:6570
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6629
__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+0x13e/0xa40 drivers/block/nbd.c:1514
blkdev_ioctl+0x3a6/0x760 block/ioctl.c:614
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: 0033:0x7f16d302bee9
RSP: 002b:00007f16d2fb8308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f16d30af418 RCX: 00007f16d302bee9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007f16d30af410 R08: 00007f16d2fb8700 R09: 0000000000000000
R10: 00007f16d2fb8700 R11: 0000000000000246 R12: 00007f16d30af41c
R13: 00007f16d307d074 R14: 64626e2f7665642f R15: 0000000000022000
INFO: task syz-executor294:3650 blocked for more than 143 seconds.
Not tainted 6.0.0-rc1-syzkaller-00160-g4c2d0b039c5c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor294 state:D stack:28616 pid: 3650 ppid: 3635 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x957/0xe20 kernel/sched/core.c:6494
schedule+0xcb/0x190 kernel/sched/core.c:6570
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6629
__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+0x13e/0xa40 drivers/block/nbd.c:1514
blkdev_ioctl+0x3a6/0x760 block/ioctl.c:614
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: 0033:0x7f16d302bee9
RSP: 002b:00007f16d2f97308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f16d30af428 RCX: 00007f16d302bee9
RDX: 0000000000000300 RSI: 000000000000ab02 RDI: 0000000000000003
RBP: 00007f16d30af420 R08: 00007f16d2f97700 R09: 0000000000000000
R10: 00007f16d2f97700 R11: 0000000000000246 R12: 00007f16d30af42c
R13: 00007f16d307d074 R14: 64626e2f7665642f R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cd20970 (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: ffffffff8cd21170 (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: ffffffff8cd207a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3290:
#0: ffff888026987098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2177
1 lock held by syz-executor294/3648:
#0: ffff88801e948198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x13e/0xa40 drivers/block/nbd.c:1514
1 lock held by syz-executor294/3649:
#0: ffff88801e948198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x13e/0xa40 drivers/block/nbd.c:1514
1 lock held by syz-executor294/3650:
#0: ffff88801e948198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x13e/0xa40 drivers/block/nbd.c:1514
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc1-syzkaller-00160-g4c2d0b039c5c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x47c/0x4b0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x169/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xcd5/0xd20 kernel/hung_task.c:369
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 1134 Comm: kworker/u4:5 Not tainted 6.0.0-rc1-syzkaller-00160-g4c2d0b039c5c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:mark_lock+0xe/0x350 kernel/locking/lockdep.c:4593
Code: 6f ff ff ff 4c 89 ff e8 b0 82 73 00 e9 62 ff ff ff e8 36 ee ce 08 66 0f 1f 44 00 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 10 <49> 89 f7 48 89 3c 24 49 bd 00 00 00 00 00 fc ff df 83 fa 08 75 28
RSP: 0018:ffffc900049df640 EFLAGS: 00000082
RAX: 0000000000000001 RBX: ffff888020e7c558 RCX: ffffffff8169b52a
RDX: 0000000000000008 RSI: ffff888020e7c618 RDI: ffff888020e7bb00
RBP: ffff888020e7bb00 R08: dffffc0000000000 R09: fffffbfff1ff3809
R10: fffffbfff1ff3809 R11: 1ffffffff1ff3808 R12: ffff888020e7c618
R13: 0000000000000003 R14: 0000000000000000 R15: ffff888020e7c638
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4b03282990 CR3: 000000000ca8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4553 [inline]
__lock_acquire+0xc7d/0x1f60 kernel/locking/lockdep.c:5007
lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5666
__mutex_lock_common+0x1de/0x26c0 kernel/locking/mutex.c:603
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
arch_jump_label_transform_queue+0x3f/0xd0 arch/x86/kernel/jump_label.c:136
__jump_label_update+0x19b/0x3b0 kernel/jump_label.c:447
static_key_disable_cpuslocked+0xc8/0x1b0 kernel/jump_label.c:207
static_key_disable+0x16/0x20 kernel/jump_label.c:215
toggle_allocation_gate+0x3d8/0x470 mm/kfence/core.c:825
process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30