INFO: task syz-executor184:3652 blocked for more than 143 seconds.
Not tainted 6.0.0-rc1-next-20220819-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor184 state:D stack:28120 pid:3652 ppid:3639 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5197 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6509
schedule+0xda/0x1b0 kernel/sched/core.c:6585
blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:180
nbd_add_socket+0x166/0x810 drivers/block/nbd.c:1123
__nbd_ioctl drivers/block/nbd.c:1464 [inline]
nbd_ioctl+0x4ab/0xbd0 drivers/block/nbd.c:1521
blkdev_ioctl+0x36e/0x800 block/ioctl.c:614
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
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+0x63/0xcd
RIP: 0033:0x7fd2632b1ee9
RSP: 002b:00007fd26325f308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd263335408 RCX: 00007fd2632b1ee9
RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003
RBP: 00007fd263335400 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd26333540c
R13: 00007fd263303074 R14: 64626e2f7665642f R15: 0000000000022000
INFO: task syz-executor184:3653 blocked for more than 143 seconds.
Not tainted 6.0.0-rc1-next-20220819-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor184 state:D stack:28864 pid:3653 ppid:3639 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5197 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6509
schedule+0xda/0x1b0 kernel/sched/core.c:6585
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6644
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747
nbd_ioctl+0x151/0xbd0 drivers/block/nbd.c:1514
blkdev_ioctl+0x36e/0x800 block/ioctl.c:614
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
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+0x63/0xcd
RIP: 0033:0x7fd2632b1ee9
RSP: 002b:00007fd26323e308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd263335418 RCX: 00007fd2632b1ee9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007fd263335410 R08: 00007fd26323e700 R09: 0000000000000000
R10: 00007fd26323e700 R11: 0000000000000246 R12: 00007fd26333541c
R13: 00007fd263303074 R14: 64626e2f7665642f R15: 0000000000022000
INFO: task syz-executor184:3654 blocked for more than 143 seconds.
Not tainted 6.0.0-rc1-next-20220819-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor184 state:D stack:29536 pid:3654 ppid:3639 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5197 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6509
schedule+0xda/0x1b0 kernel/sched/core.c:6585
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6644
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747
nbd_ioctl+0x151/0xbd0 drivers/block/nbd.c:1514
blkdev_ioctl+0x36e/0x800 block/ioctl.c:614
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
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+0x63/0xcd
RIP: 0033:0x7fd2632b1ee9
RSP: 002b:00007fd26321d308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd263335428 RCX: 00007fd2632b1ee9
RDX: 0000000000000040 RSI: 000000000000ab07 RDI: 0000000000000003
RBP: 00007fd263335420 R08: 00007fd26321d700 R09: 0000000000000000
R10: 00007fd26321d700 R11: 0000000000000246 R12: 00007fd26333542c
R13: 00007fd263303074 R14: 64626e2f7665642f R15: 0000000000022000
Showing all threads with locks held in the system:
task:rcu_tasks_kthre state:I stack:29096 pid:12 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5197 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6509
schedule+0xda/0x1b0 kernel/sched/core.c:6585
rcu_tasks_one_gp+0x3e5/0xc70 kernel/rcu/tasks.h:514
rcu_tasks_kthread+0x73/0xa0 kernel/rcu/tasks.h:552
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8bf88f30 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
task:rcu_tasks_trace state:I stack:29120 pid:13 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5197 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6509
schedule+0xda/0x1b0 kernel/sched/core.c:6585
rcu_tasks_one_gp+0x3e5/0xc70 kernel/rcu/tasks.h:514
rcu_tasks_kthread+0x73/0xa0 kernel/rcu/tasks.h:552
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8bf88c30 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
task:getty state:S stack:23392 pid:3296 ppid:1 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5197 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6509
schedule+0xda/0x1b0 kernel/sched/core.c:6585
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
wait_woken+0x18b/0x1f0 kernel/sched/wait.c:459
n_tty_read+0x1051/0x13e0 drivers/tty/n_tty.c:2243
iterate_tty_read drivers/tty/tty_io.c:858 [inline]
tty_read+0x33a/0x5d0 drivers/tty/tty_io.c:933
call_read_iter include/linux/fs.h:2182 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x67d/0x930 fs/read_write.c:470
ksys_read+0x127/0x250 fs/read_write.c:607
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+0x63/0xcd
RIP: 0033:0x7fd49e0ea8fe
RSP: 002b:00007ffed6cc5c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00005605fb242910 RCX: 00007fd49e0ea8fe
RDX: 0000000000000001 RSI: 00007ffed6cc5c60 RDI: 0000000000000000
RBP: 00005605fb242970 R08: 0000000000000007 R09: 00005605fb243cd0
R10: 0000000000000063 R11: 0000000000000246 R12: 00005605fb2429ac
R13: 00007ffed6cc5c60 R14: 0000000000000000 R15: 00005605fb2429ac
2 locks held by getty/3296:
#0: ffff888144ba9098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef0/0x13e0 drivers/tty/n_tty.c:2177
task:syz-executor184 state:D stack:28120 pid:3652 ppid:3639 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5197 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6509
schedule+0xda/0x1b0 kernel/sched/core.c:6585
blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:180
nbd_add_socket+0x166/0x810 drivers/block/nbd.c:1123
__nbd_ioctl drivers/block/nbd.c:1464 [inline]
nbd_ioctl+0x4ab/0xbd0 drivers/block/nbd.c:1521
blkdev_ioctl+0x36e/0x800 block/ioctl.c:614
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
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+0x63/0xcd
RIP: 0033:0x7fd2632b1ee9
RSP: 002b:00007fd26325f308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd263335408 RCX: 00007fd2632b1ee9
RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003
RBP: 00007fd263335400 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd26333540c
R13: 00007fd263303074 R14: 64626e2f7665642f R15: 0000000000022000
1 lock held by syz-executor184/3652:
#0: ffff88801e5c3998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x151/0xbd0 drivers/block/nbd.c:1514
task:syz-executor184 state:D stack:28864 pid:3653 ppid:3639 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5197 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6509
schedule+0xda/0x1b0 kernel/sched/core.c:6585
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6644
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747
nbd_ioctl+0x151/0xbd0 drivers/block/nbd.c:1514
blkdev_ioctl+0x36e/0x800 block/ioctl.c:614
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
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+0x63/0xcd
RIP: 0033:0x7fd2632b1ee9
RSP: 002b:00007fd26323e308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd263335418 RCX: 00007fd2632b1ee9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007fd263335410 R08: 00007fd26323e700 R09: 0000000000000000
R10: 00007fd26323e700 R11: 0000000000000246 R12: 00007fd26333541c
R13: 00007fd263303074 R14: 64626e2f7665642f R15: 0000000000022000
1 lock held by syz-executor184/3653:
#0: ffff88801e5c3998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x151/0xbd0 drivers/block/nbd.c:1514
task:syz-executor184 state:D stack:29536 pid:3654 ppid:3639 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5197 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6509
schedule+0xda/0x1b0 kernel/sched/core.c:6585
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6644
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747
nbd_ioctl+0x151/0xbd0 drivers/block/nbd.c:1514
blkdev_ioctl+0x36e/0x800 block/ioctl.c:614
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
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+0x63/0xcd
RIP: 0033:0x7fd2632b1ee9
RSP: 002b:00007fd26321d308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd263335428 RCX: 00007fd2632b1ee9
RDX: 0000000000000040 RSI: 000000000000ab07 RDI: 0000000000000003
RBP: 00007fd263335420 R08: 00007fd26321d700 R09: 0000000000000000
R10: 00007fd26321d700 R11: 0000000000000246 R12: 00007fd26333542c
R13: 00007fd263303074 R14: 64626e2f7665642f R15: 0000000000022000
1 lock held by syz-executor184/3654:
#0: ffff88801e5c3998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x151/0xbd0 drivers/block/nbd.c:1514
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc1-next-20220819-syzkaller #0
khungtaskd[28] cmdline: a
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
__dump_stack lib/dump_stack.c:122 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:140
nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:227 [inline]
watchdog+0xcf7/0xfd0 kernel/hung_task.c:384
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 91 Comm: kworker/u4:4 Not tainted 6.0.0-rc1-next-20220819-syzkaller #0
kworker/u4:4[91] cmdline: y yR
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: 0x0 (events_unbound)
RIP: 0010:newidle_balance+0xb83/0x1190 kernel/sched/fair.c:11306
Code: 0d 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 f7 05 00 00 48 8b 83 48 0d 00 00 e9 56 f7 ff ff a8 1a 0d 00 85 c0 0f 85 02 f8 ff ff e8 8b 8c 27 08 85 c0 0f 84
RSP: 0018:ffffc90001577b70 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff8880b9b39f80 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 000000010000dab6 R08: ffffffff81588ffc R09: ffffffff908e0947
R10: fffffbfff211c128 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000001 R14: ffffed101736740a R15: ffff888015a48400
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f332140680 CR3: 000000000bc8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
pick_next_task_fair+0x96/0x12e0 kernel/sched/fair.c:7646
__pick_next_task kernel/sched/core.c:5819 [inline]
pick_next_task kernel/sched/core.c:5894 [inline]
__schedule+0x426/0x52b0 kernel/sched/core.c:6473
schedule+0xda/0x1b0 kernel/sched/core.c:6585
worker_thread+0x15c/0x1080 kernel/workqueue.c:2457
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306