sd 0:0:1:0: [sda] tag#2783 8 sectors total, 4096 bytes done.
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P14875/2:b..l.. P14893/1:b..l.. P58/1:b..l..
rcu: (detected by 0, t=10502 jiffies, g=66289, q=1269 ncpus=2)
task:kworker/1:1H state:R running task stack:25912 pid:58 tgid:58 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: events_highpri snd_vmidi_output_work
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x171d/0x56f0 kernel/sched/core.c:7382
preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7561
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
rt_mutex_wake_up_q kernel/locking/rtmutex.c:583 [inline]
rt_mutex_slowunlock+0x6d3/0xa30 kernel/locking/rtmutex.c:1483
rt_spin_unlock+0x10f/0x200 kernel/locking/spinlock_rt.c:84
spin_unlock_irqrestore include/linux/spinlock_rt.h:141 [inline]
class_spinlock_irqsave_destructor include/linux/spinlock.h:644 [inline]
snd_rawmidi_transmit+0x94/0xc0 sound/core/rawmidi.c:1549
snd_vmidi_output_work+0x1a5/0x3e0 sound/core/seq/seq_virmidi.c:152
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
kthread+0x38b/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:syz.3.2572 state:R running task stack:28712 pid:14893 tgid:14889 ppid:5618 task_flags:0x400040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x171d/0x56f0 kernel/sched/core.c:7382
preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7561
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline]
_raw_spin_unlock_irqrestore+0x76/0x80 kernel/locking/spinlock.c:221
task_rq_unlock kernel/sched/sched.h:2005 [inline]
sched_core_update_cookie kernel/sched/core_sched.c:96 [inline]
__sched_core_set+0x27e/0x430 kernel/sched/core_sched.c:126
sched_core_share_pid+0x5e8/0x790 kernel/sched/core_sched.c:228
__do_sys_prctl kernel/sys.c:2811 [inline]
__se_sys_prctl+0x863/0x1900 kernel/sys.c:2537
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffac85ffb19
RSP: 002b:00007ffac6856028 EFLAGS: 00000246 ORIG_RAX: 000000000000009d
RAX: ffffffffffffffda RBX: 00007ffac8885fa0 RCX: 00007ffac85ffb19
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000000003e
RBP: 00007ffac8697b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffac8886038 R14: 00007ffac8885fa0 R15: 00007ffd99b5e4f8
task:syz.1.2570 state:R running task stack:24328 pid:14875 tgid:14874 ppid:5615 task_flags:0x40044c flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x171d/0x56f0 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:_compound_head include/linux/page-flags.h:221 [inline]
RIP: 0010:zap_present_ptes mm/memory.c:1805 [inline]
RIP: 0010:do_zap_pte_range mm/memory.c:1924 [inline]
RIP: 0010:zap_pte_range mm/memory.c:2026 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:2117 [inline]
RIP: 0010:zap_pud_range mm/memory.c:2145 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:2166 [inline]
RIP: 0010:__zap_vma_range+0xe07/0x49d0 mm/memory.c:2206
Code: 8b 7c 24 30 4c 89 fe 48 8b 54 24 08 e8 32 d4 ff ff 48 85 c0 0f 84 99 01 00 00 48 8d 78 08 48 89 f9 48 c1 e9 03 42 80 3c 29 00 <48> 89 84 24 d8 00 00 00 74 0d e8 da 8a 1a 00 48 8b 84 24 d8 00 00
RSP: 0018:ffffc900045f73a0 EFLAGS: 00000246
RAX: ffffea0001345a40 RBX: ffff88803c70ce00 RCX: 1ffffd4000268b49
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea0001345a48
RBP: ffffc900045f7690 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff9400037423f R12: ffffc900045f7778
R13: dffffc0000000000 R14: ffff8880125ea690 R15: 000055556e0d2000
unmap_vmas+0x38b/0x550 mm/memory.c:2275
exit_mmap+0x290/0xa40 mm/mmap.c:1315
__mmput+0xcb/0x3d0 kernel/fork.c:1192
exit_mm+0x18e/0x240 kernel/exit.c:586
do_exit+0x6a8/0x2360 kernel/exit.c:967
do_group_exit+0x22d/0x2f0 kernel/exit.c:1123
get_signal+0x136a/0x1430 kernel/signal.c:3113
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcc399afb19
RSP: 002b:00007fcc37bfe028 EFLAGS: 00000246 ORIG_RAX: 00000000000000c7
RAX: fffffffffffffe00 RBX: 00007fcc39c35fa0 RCX: 00007fcc399afb19
RDX: 0000000000000000 RSI: 0000200000000500 RDI: 0000000000000004
RBP: 00007fcc39a47b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcc39c36038 R14: 00007fcc39c35fa0 R15: 00007ffdb2b7cbb8