Message-ID: <0000000000005a6b660589dcfb60@google.com>
Date:   Mon, 27 May 2019 04:38:06 -0700
From:   syzbot <syzbot+192a537b5c634febc6cf@...kaller.appspotmail.com>
To:     alsa-devel@...a-project.org, andreyknvl@...gle.com,
        keescook@...omium.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, perex@...ex.cz,
        syzkaller-bugs@...glegroups.com, tiwai@...e.com
Subject: WARNING in line6_pcm_acquire

Hello,

syzbot found the following crash on:

HEAD commit:    43151d6c usb-fuzzer: main usb gadget fuzzer driver
git tree:       https://github.com/google/kasan.git usb-fuzzer
console output: https://syzkaller.appspot.com/x/log.txt?x=169fe1f8a00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=95aff7278e7ff25e
dashboard link: https://syzkaller.appspot.com/bug?extid=192a537b5c634febc6cf
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+192a537b5c634febc6cf@...kaller.appspotmail.com

------------[ cut here ]------------
do not call blocking ops when !TASK_RUNNING; state=1 set at  
[<000000009424b595>] do_nanosleep+0x107/0x6a0 kernel/time/hrtimer.c:1675
WARNING: CPU: 0 PID: 4661 at kernel/sched/core.c:6136  
__might_sleep+0x135/0x190 kernel/sched/core.c:6136
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 4661 Comm: syz-executor.4 Not tainted 5.1.0-rc3+ #8
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS  
Google 01/01/2011
Call Trace:
  <IRQ>
  __dump_stack lib/dump_stack.c:77 [inline]
  dump_stack+0xca/0x13e lib/dump_stack.c:113
  panic+0x292/0x5e1 kernel/panic.c:214
  __warn.cold+0x20/0x53 kernel/panic.c:571
  report_bug+0x262/0x2a0 lib/bug.c:186
  fixup_bug arch/x86/kernel/traps.c:179 [inline]
  fixup_bug arch/x86/kernel/traps.c:174 [inline]
  do_error_trap+0x12b/0x1e0 arch/x86/kernel/traps.c:272
  do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:291
  invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:__might_sleep+0x135/0x190 kernel/sched/core.c:6136
Code: 65 48 8b 1c 25 c0 de 01 00 48 8d 7b 10 48 89 fe 48 c1 ee 03 80 3c 06  
00 75 2b 48 8b 73 10 48 c7 c7 c0 ec c5 85 e8 c6 4b f6 ff <0f> 0b e9 46 ff  
ff ff e8 2f d0 45 00 e9 29 ff ff ff e8 25 d0 45 00
RSP: 0018:ffff8881db207b48 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8881c7d71800 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff8127bbcd RDI: ffffed103b640f5b
RBP: ffffffff85c622c0 R08: ffff8881c7d71800 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000038c
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff849f6d40
  __mutex_lock_common kernel/locking/mutex.c:908 [inline]
  __mutex_lock+0xc8/0x12b0 kernel/locking/mutex.c:1072
  line6_pcm_acquire+0x30/0x210 sound/usb/line6/pcm.c:311
  call_timer_fn+0x15c/0x5e0 kernel/time/timer.c:1325
  expire_timers kernel/time/timer.c:1362 [inline]
  __run_timers kernel/time/timer.c:1681 [inline]
  __run_timers kernel/time/timer.c:1649 [inline]
  run_timer_softirq+0x586/0x1400 kernel/time/timer.c:1694
  __do_softirq+0x21f/0x8bc kernel/softirq.c:293
  invoke_softirq kernel/softirq.c:374 [inline]
  irq_exit+0x17c/0x1a0 kernel/softirq.c:414
  exiting_irq arch/x86/include/asm/apic.h:536 [inline]
  smp_apic_timer_interrupt+0xf1/0x490 arch/x86/kernel/apic/apic.c:1062
  apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
  </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:81 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160  
[inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x40/0x50  
kernel/locking/spinlock.c:184
Code: e8 25 19 bc fb 48 89 ef e8 dd f7 bc fb f6 c7 02 75 11 53 9d e8 a1 fd  
d8 fb 65 ff 0d 0a 59 99 7a 5b 5d c3 e8 d2 fb d8 fb 53 9d <eb> ed 0f 1f 40  
00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 fd 65 ff
RSP: 0018:ffff8881b13ffba8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000007 RBX: 0000000000000246 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffff8881c7d72034
RBP: ffff8881db224a80 R08: ffff8881c7d71800 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8881db224b00 R14: ffff8881db224b00 R15: ffff8881db224a80
  unlock_hrtimer_base kernel/time/hrtimer.c:878 [inline]
  hrtimer_start_range_ns+0x5b0/0xad0 kernel/time/hrtimer.c:1109
  hrtimer_start_expires include/linux/hrtimer.h:409 [inline]
  do_nanosleep+0x19b/0x6a0 kernel/time/hrtimer.c:1676
  hrtimer_nanosleep+0x258/0x510 kernel/time/hrtimer.c:1733
  __do_sys_nanosleep kernel/time/hrtimer.c:1767 [inline]
  __se_sys_nanosleep kernel/time/hrtimer.c:1754 [inline]
  __x64_sys_nanosleep+0x19d/0x220 kernel/time/hrtimer.c:1754
  do_syscall_64+0xbd/0x500 arch/x86/entry/common.c:290
  entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x486570
Code: 00 00 48 c7 c0 d4 ff ff ff 64 c7 00 16 00 00 00 31 c0 eb be 66 0f 1f  
44 00 00 83 3d e1 01 5d 00 00 75 14 b8 23 00 00 00 0f 05 <48> 3d 01 f0 ff  
ff 0f 83 b4 e0 f8 ff c3 48 83 ec 08 e8 ea 53 fd ff
RSP: 002b:00007ffc588bb088 EFLAGS: 00000246 ORIG_RAX: 0000000000000023
RAX: ffffffffffffffda RBX: 00000000000a95fa RCX: 0000000000486570
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffc588bb090
RBP: 00000000000002d5 R08: 0000000000000001 R09: 00000000027fc940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00007ffc588bb0e0 R14: 00000000000a8e2a R15: 00007ffc588bb0f0
Kernel Offset: disabled
Rebooting in 86400 seconds..


---
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