INFO: task syz-executor154:3653 blocked for more than 143 seconds.
Not tainted 5.19.0-next-20220809-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor154 state:D stack:28120 pid:3653 ppid:3643 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
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: 0033:0x7f5b4aef2399
RSP: 002b:00007ffcdaaf2428 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000077b86 RCX: 00007f5b4aef2399
RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffcdaaf25c8 R09: 00007ffcdaaf25c8
R10: 00007ffcdaaf1ea0 R11: 0000000000000246 R12: 00007ffcdaaf243c
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
Showing all threads with locks held in the system:
task:rcu_tasks_kthre state:I stack:29000 pid:12 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
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: ffffffff8bf889b0 (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:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
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: ffffffff8bf886b0 (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:3286 ppid:1 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
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:2186 [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: 0033:0x7f0f769d18fe
RSP: 002b:00007fff5e299768 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00005610d1031910 RCX: 00007f0f769d18fe
RDX: 0000000000000001 RSI: 00007fff5e299780 RDI: 0000000000000000
RBP: 00005610d1031970 R08: 0000000000000007 R09: 00005610d1032cd0
R10: 0000000000000063 R11: 0000000000000246 R12: 00005610d10319ac
R13: 00007fff5e299780 R14: 0000000000000000 R15: 00005610d10319ac
2 locks held by getty/3286:
#0: ffff888026c6a098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef0/0x13e0 drivers/tty/n_tty.c:2177
task:syz-executor154 state:D stack:28120 pid:3653 ppid:3643 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
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: 0033:0x7f5b4aef2399
RSP: 002b:00007ffcdaaf2428 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000077b86 RCX: 00007f5b4aef2399
RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffcdaaf25c8 R09: 00007ffcdaaf25c8
R10: 00007ffcdaaf1ea0 R11: 0000000000000246 R12: 00007ffcdaaf243c
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
1 lock held by syz-executor154/3653:
#0: ffff888147430198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x151/0xbd0 drivers/block/nbd.c:1514
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.19.0-next-20220809-syzkaller #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+0xcd/0x134 lib/dump_stack.c:106
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.19.0-next-20220809-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:__list_del include/linux/list.h:115 [inline]
RIP: 0010:__list_del_entry include/linux/list.h:137 [inline]
RIP: 0010:__list_del_entry include/linux/list.h:132 [inline]
RIP: 0010:list_move include/linux/list.h:217 [inline]
RIP: 0010:detach_tasks kernel/sched/fair.c:8142 [inline]
RIP: 0010:load_balance+0x1207/0x2fc0 kernel/sched/fair.c:10164
Code: 32 00 0f 85 66 13 00 00 48 8d 78 08 4d 8b 6c 24 08 48 89 fa 48 c1 ea 03 42 80 3c 32 00 0f 85 91 10 00 00 4c 89 ea 4c 89 68 08 <48> c1 ea 03 42 80 3c 32 00 0f 85 95 10 00 00 49 89 45 00 4c 89 f8
RSP: 0018:ffffc90000007c10 EFLAGS: 00000046
RAX: ffff8880b9b3aaa8 RBX: ffff8880b9b39f80 RCX: ffffffff81568844
RDX: ffff88807f6dbba8 RSI: 0000000000000008 RDI: ffff8880b9b3aab0
RBP: ffffc90000007de0 R08: 0000000000000000 R09: ffff8880176e042f
R10: ffffed1002edc085 R11: ffff8880b9b3ab58 R12: ffff8880176e00a8
R13: ffff88807f6dbba8 R14: dffffc0000000000 R15: ffff8880b9b3aaa8
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f54bd5ed990 CR3: 00000000266a2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rebalance_domains+0x65a/0xc30 kernel/sched/fair.c:10561
_nohz_idle_balance.isra.0+0x410/0x630 kernel/sched/fair.c:10991
__do_softirq+0x1d3/0x9c6 kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_call_function_single+0x93/0xc0 arch/x86/kernel/smp.c:243
asm_sysvec_call_function_single+0x16/0x20 arch/x86/include/asm/idtentry.h:657
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:acpi_safe_halt+0x6f/0xb0 drivers/acpi/processor_idle.c:113
Code: f7 84 db 74 06 5b e9 20 9e f9 f7 e8 1b 9e f9 f7 e8 d6 15 00 f8 66 90 e8 0f 9e f9 f7 0f 00 2d 48 57 d2 00 e8 03 9e f9 f7 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 ce 9a f9 f7 48 85 db
RSP: 0018:ffffffff8bc07d38 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffffffff8bcbc980 RSI: ffffffff898267fd RDI: 0000000000000000
RBP: ffff888017a92064 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000001 R14: ffff888017a92000 R15: ffff88801b4cd004
acpi_idle_do_entry drivers/acpi/processor_idle.c:555 [inline]
acpi_idle_enter+0x524/0x6a0 drivers/acpi/processor_idle.c:692
cpuidle_enter_state+0x1ab/0xd30 drivers/cpuidle/cpuidle.c:239
cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:356
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x3e8/0x590 kernel/sched/idle.c:303
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400
rest_init+0x169/0x270 init/main.c:729
arch_call_rest_init+0xf/0x14 init/main.c:886
start_kernel+0x46e/0x48f init/main.c:1141
secondary_startup_64_no_verify+0xce/0xdb
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.119 msecs