INFO: task hung in pipe_release (2)
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syzbot
Sep 1, 2019, 7:08:06 PM9/1/19
to syzkaller-a...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 1488597c ANDROID: fiq_debugger: remove
git tree: android-4.9
console output: https://syzkaller.appspot.com/x/log.txt?x=148f8a32600000
kernel config: https://syzkaller.appspot.com/x/.config?x=e8b2cf508e16a5b
dashboard link: https://syzkaller.appspot.com/bug?extid=3508ad9d858f43d1aa35
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+3508ad...@syzkaller.appspotmail.com
INFO: task syz-executor.0:3241 blocked for more than 140 seconds.
Not tainted 4.9.190+ #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D27240 3241 2108 0x00000004
0000000000000083 ffff8801c5d70000 ffff8801d1129b80 ffff8801db721000
ffff8801d1885f00 ffff8801db721018 ffff8801ae4cfc78 ffffffff8281a10e
0000000000000000 0000000000000000 00ffffff83c7c1d0 ffff8801db7218f0
Call Trace:
[<0000000028259ce2>] schedule+0x92/0x1c0 kernel/sched/core.c:3546
[<0000000010744790>] schedule_preempt_disabled+0x13/0x20
kernel/sched/core.c:3579
[<000000003ef5c2ee>] __mutex_lock_common kernel/locking/mutex.c:582
[inline]
[<000000003ef5c2ee>] mutex_lock_nested+0x38d/0x920
kernel/locking/mutex.c:621
[<00000000ab86aecf>] __pipe_lock fs/pipe.c:87 [inline]
[<00000000ab86aecf>] pipe_release+0x4e/0x250 fs/pipe.c:582
[<00000000f4b311ed>] __fput+0x274/0x720 fs/file_table.c:208
[<00000000dc0460d1>] ____fput+0x16/0x20 fs/file_table.c:244
[<00000000e0700a71>] task_work_run+0x108/0x180 kernel/task_work.c:116
[<000000003db28b4c>] tracehook_notify_resume include/linux/tracehook.h:191
[inline]
[<000000003db28b4c>] exit_to_usermode_loop+0x13b/0x160
arch/x86/entry/common.c:163
[<0000000058992ba8>] prepare_exit_to_usermode arch/x86/entry/common.c:195
[inline]
[<0000000058992ba8>] syscall_return_slowpath arch/x86/entry/common.c:266
[inline]
[<0000000058992ba8>] do_syscall_64+0x3ab/0x5c0 arch/x86/entry/common.c:293
[<0000000028008a47>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Showing all locks held in the system:
2 locks held by khungtaskd/24:
#0: (rcu_read_lock){......}, at: [<000000008c505f2f>]
check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline]
#0: (rcu_read_lock){......}, at: [<000000008c505f2f>]
watchdog+0x14b/0xaf0 kernel/hung_task.c:263
#1: (tasklist_lock){.+.+..}, at: [<00000000b18a4b6f>]
debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4336
2 locks held by getty/2033:
#0: (&tty->ldisc_sem){++++++}, at: [<00000000fcd0e827>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+...}, at: [<00000000caf66cd9>]
n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156
1 lock held by syz-executor.0/3241:
#0: (&pipe->mutex/1){+.+.+.}, at: [<00000000ab86aecf>] __pipe_lock
fs/pipe.c:87 [inline]
#0: (&pipe->mutex/1){+.+.+.}, at: [<00000000ab86aecf>]
pipe_release+0x4e/0x250 fs/pipe.c:582
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.190+ #2
ffff8801d98d7cc8 ffffffff81b66c51 0000000000000000 0000000000000000
0000000000000000 ffffffff81099a01 dffffc0000000000 ffff8801d98d7d00
ffffffff81b71eec 0000000000000000 0000000000000000 0000000000000000
Call Trace:
[<00000000417ca2cc>] __dump_stack lib/dump_stack.c:15 [inline]
[<00000000417ca2cc>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
[<000000004d992e9c>] nmi_cpu_backtrace.cold+0x47/0x87
lib/nmi_backtrace.c:99
[<0000000036672b3a>] nmi_trigger_cpumask_backtrace+0x124/0x155
lib/nmi_backtrace.c:60
[<000000007381f56e>] arch_trigger_cpumask_backtrace+0x14/0x20
arch/x86/kernel/apic/hw_nmi.c:37
[<00000000676f002f>] trigger_all_cpu_backtrace include/linux/nmi.h:58
[inline]
[<00000000676f002f>] check_hung_task kernel/hung_task.c:126 [inline]
[<00000000676f002f>] check_hung_uninterruptible_tasks
kernel/hung_task.c:183 [inline]
[<00000000676f002f>] watchdog+0x670/0xaf0 kernel/hung_task.c:263
[<00000000076e094a>] kthread+0x278/0x310 kernel/kthread.c:211
[<00000000754a5852>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3260 Comm: syz-executor.0 Not tainted 4.9.190+ #2
task: 000000004214e1c9 task.stack: 00000000c6912081
RIP: 0010:[<ffffffff811748e1>] c [<00000000be6bb4dd>] constant_test_bit
arch/x86/include/asm/bitops.h:311 [inline]
RIP: 0010:[<ffffffff811748e1>] c [<00000000be6bb4dd>] test_ti_thread_flag
include/linux/thread_info.h:58 [inline]
RIP: 0010:[<ffffffff811748e1>] c [<00000000be6bb4dd>] test_tsk_thread_flag
include/linux/sched.h:3396 [inline]
RIP: 0010:[<ffffffff811748e1>] c [<00000000be6bb4dd>]
test_tsk_need_resched include/linux/sched.h:3411 [inline]
RIP: 0010:[<ffffffff811748e1>] c [<00000000be6bb4dd>]
check_preempt_curr+0x131/0x3b0 kernel/sched/core.c:976
RSP: 0018:ffff8801db707c50 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff8801db721000 RCX: ffff8801db721000
RDX: 0000000000000000 RSI: ffffffff81bcd2ac RDI: ffff8801a9d5981c
RBP: ffff8801db707c98 R08: ffff8801db7218f0 R09: 0000000000000003
R10: ffff8801cf668270 R11: 00000042adfd121a R12: ffffffff82a4ca80
R13: ffffffff82a4ca80 R14: 0000000000000000 R15: ffff8801a9d597c0
FS: 00007f4c2ff4e700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000201c1000 CR3: 00000001c73f3000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
ffff8801cf668288 c ffff8801db721170 c ffff8801db7218f0 c ffff8801db721000 c
ffff8801db721000 c ffff8801cf668000 c ffff8801db707d80 c 0000000000000000 c
ffff8801cf6687f8 c ffff8801db707cd8 c ffffffff81174b7f c ffffffff8117409a c
Call Trace:
<IRQ> d [<000000002376f83a>] ttwu_do_wakeup.isra.0+0x1f/0x580
kernel/sched/core.c:1707
[<0000000085645ac8>] ttwu_do_activate+0x154/0x200 kernel/sched/core.c:1753
[<00000000f676b07c>] ttwu_queue kernel/sched/core.c:1908 [inline]
[<00000000f676b07c>] try_to_wake_up+0x5a3/0x1030 kernel/sched/core.c:2122
[<0000000099c2eec4>] wake_up_process+0x10/0x20 kernel/sched/core.c:2197
[<000000004a793869>] hrtimer_wakeup+0x48/0x60 kernel/time/hrtimer.c:1476
[<00000000bb1d690f>] __run_hrtimer kernel/time/hrtimer.c:1255 [inline]
[<00000000bb1d690f>] __hrtimer_run_queues+0x313/0xe00
kernel/time/hrtimer.c:1319
[<00000000fbb5c62a>] hrtimer_interrupt+0x1b6/0x450
kernel/time/hrtimer.c:1353
[<00000000028425ba>] local_apic_timer_interrupt+0x76/0xa0
arch/x86/kernel/apic/apic.c:937
[<00000000ff1e574e>] smp_apic_timer_interrupt+0x79/0xb0
arch/x86/kernel/apic/apic.c:961
[<000000003a8e397b>] apic_timer_interrupt+0xa5/0xb0
arch/x86/entry/entry_64.S:653
<EOI> d [<00000000cb094bbe>] ? arch_local_irq_restore
arch/x86/include/asm/paravirt.h:768 [inline]
<EOI> d [<00000000cb094bbe>] ? lock_acquire+0x176/0x3d0
kernel/locking/lockdep.c:3759
[<00000000448bb6ae>] down_read+0x44/0xb0 kernel/locking/rwsem.c:22
[<000000007f5cbf92>] ext4_page_mkwrite+0x1a5/0x1040 fs/ext4/inode.c:5768
[<00000000ecd89c9f>] do_page_mkwrite+0x1d1/0x400 mm/memory.c:2061
[<00000000efe1e017>] wp_page_shared mm/memory.c:2326 [inline]
[<00000000efe1e017>] do_wp_page+0xab8/0x20a0 mm/memory.c:2430
[<00000000f53a0c0e>] handle_pte_fault mm/memory.c:3562 [inline]
[<00000000f53a0c0e>] __handle_mm_fault mm/memory.c:3634 [inline]
[<00000000f53a0c0e>] handle_mm_fault+0xeff/0x2420 mm/memory.c:3671
[<000000000dd18bd1>] __do_page_fault+0x3f0/0xa60 arch/x86/mm/fault.c:1401
[<000000002208325f>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1464
[<000000007765be44>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:956
[<000000007b24413d>] pipe_to_user+0xb0/0x160 fs/splice.c:1256
[<00000000efac710f>] splice_from_pipe_feed fs/splice.c:521 [inline]
[<00000000efac710f>] __splice_from_pipe+0x351/0x790 fs/splice.c:645
[<00000000c1819c92>] vmsplice_to_user+0x1bd/0x1e0 fs/splice.c:1291
[<000000008ea6c812>] SYSC_vmsplice fs/splice.c:1370 [inline]
[<000000008ea6c812>] SyS_vmsplice+0x114/0x140 fs/splice.c:1353
[<000000005d5048d5>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
[<0000000028008a47>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: cd0 c7c c08 c84 cd2 c0f c85 c4a c01 c00 c00 c41 c83 c7f
c5c c01 c74 c0f c48 c83 cc4 c20 c5b c41 c5c c41 c5d c41 c5e
c41 c5f c5d cc3 c48 cb8 c00 c00 c00 c00 c00 cfc cff cdf
c<4c> c89 cfa c48 cc1 cea c03 c80 c3c c02 c00 c0f c85 c41
c02 c00 c00 c49 c8b c07 ca8 c
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following crash on:
HEAD commit: 1488597c ANDROID: fiq_debugger: remove
git tree: android-4.9
console output: https://syzkaller.appspot.com/x/log.txt?x=148f8a32600000
kernel config: https://syzkaller.appspot.com/x/.config?x=e8b2cf508e16a5b
dashboard link: https://syzkaller.appspot.com/bug?extid=3508ad9d858f43d1aa35
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+3508ad...@syzkaller.appspotmail.com
INFO: task syz-executor.0:3241 blocked for more than 140 seconds.
Not tainted 4.9.190+ #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D27240 3241 2108 0x00000004
0000000000000083 ffff8801c5d70000 ffff8801d1129b80 ffff8801db721000
ffff8801d1885f00 ffff8801db721018 ffff8801ae4cfc78 ffffffff8281a10e
0000000000000000 0000000000000000 00ffffff83c7c1d0 ffff8801db7218f0
Call Trace:
[<0000000028259ce2>] schedule+0x92/0x1c0 kernel/sched/core.c:3546
[<0000000010744790>] schedule_preempt_disabled+0x13/0x20
kernel/sched/core.c:3579
[<000000003ef5c2ee>] __mutex_lock_common kernel/locking/mutex.c:582
[inline]
[<000000003ef5c2ee>] mutex_lock_nested+0x38d/0x920
kernel/locking/mutex.c:621
[<00000000ab86aecf>] __pipe_lock fs/pipe.c:87 [inline]
[<00000000ab86aecf>] pipe_release+0x4e/0x250 fs/pipe.c:582
[<00000000f4b311ed>] __fput+0x274/0x720 fs/file_table.c:208
[<00000000dc0460d1>] ____fput+0x16/0x20 fs/file_table.c:244
[<00000000e0700a71>] task_work_run+0x108/0x180 kernel/task_work.c:116
[<000000003db28b4c>] tracehook_notify_resume include/linux/tracehook.h:191
[inline]
[<000000003db28b4c>] exit_to_usermode_loop+0x13b/0x160
arch/x86/entry/common.c:163
[<0000000058992ba8>] prepare_exit_to_usermode arch/x86/entry/common.c:195
[inline]
[<0000000058992ba8>] syscall_return_slowpath arch/x86/entry/common.c:266
[inline]
[<0000000058992ba8>] do_syscall_64+0x3ab/0x5c0 arch/x86/entry/common.c:293
[<0000000028008a47>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Showing all locks held in the system:
2 locks held by khungtaskd/24:
#0: (rcu_read_lock){......}, at: [<000000008c505f2f>]
check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline]
#0: (rcu_read_lock){......}, at: [<000000008c505f2f>]
watchdog+0x14b/0xaf0 kernel/hung_task.c:263
#1: (tasklist_lock){.+.+..}, at: [<00000000b18a4b6f>]
debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4336
2 locks held by getty/2033:
#0: (&tty->ldisc_sem){++++++}, at: [<00000000fcd0e827>]
ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
#1: (&ldata->atomic_read_lock){+.+...}, at: [<00000000caf66cd9>]
n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156
1 lock held by syz-executor.0/3241:
#0: (&pipe->mutex/1){+.+.+.}, at: [<00000000ab86aecf>] __pipe_lock
fs/pipe.c:87 [inline]
#0: (&pipe->mutex/1){+.+.+.}, at: [<00000000ab86aecf>]
pipe_release+0x4e/0x250 fs/pipe.c:582
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.190+ #2
ffff8801d98d7cc8 ffffffff81b66c51 0000000000000000 0000000000000000
0000000000000000 ffffffff81099a01 dffffc0000000000 ffff8801d98d7d00
ffffffff81b71eec 0000000000000000 0000000000000000 0000000000000000
Call Trace:
[<00000000417ca2cc>] __dump_stack lib/dump_stack.c:15 [inline]
[<00000000417ca2cc>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
[<000000004d992e9c>] nmi_cpu_backtrace.cold+0x47/0x87
lib/nmi_backtrace.c:99
[<0000000036672b3a>] nmi_trigger_cpumask_backtrace+0x124/0x155
lib/nmi_backtrace.c:60
[<000000007381f56e>] arch_trigger_cpumask_backtrace+0x14/0x20
arch/x86/kernel/apic/hw_nmi.c:37
[<00000000676f002f>] trigger_all_cpu_backtrace include/linux/nmi.h:58
[inline]
[<00000000676f002f>] check_hung_task kernel/hung_task.c:126 [inline]
[<00000000676f002f>] check_hung_uninterruptible_tasks
kernel/hung_task.c:183 [inline]
[<00000000676f002f>] watchdog+0x670/0xaf0 kernel/hung_task.c:263
[<00000000076e094a>] kthread+0x278/0x310 kernel/kthread.c:211
[<00000000754a5852>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3260 Comm: syz-executor.0 Not tainted 4.9.190+ #2
task: 000000004214e1c9 task.stack: 00000000c6912081
RIP: 0010:[<ffffffff811748e1>] c [<00000000be6bb4dd>] constant_test_bit
arch/x86/include/asm/bitops.h:311 [inline]
RIP: 0010:[<ffffffff811748e1>] c [<00000000be6bb4dd>] test_ti_thread_flag
include/linux/thread_info.h:58 [inline]
RIP: 0010:[<ffffffff811748e1>] c [<00000000be6bb4dd>] test_tsk_thread_flag
include/linux/sched.h:3396 [inline]
RIP: 0010:[<ffffffff811748e1>] c [<00000000be6bb4dd>]
test_tsk_need_resched include/linux/sched.h:3411 [inline]
RIP: 0010:[<ffffffff811748e1>] c [<00000000be6bb4dd>]
check_preempt_curr+0x131/0x3b0 kernel/sched/core.c:976
RSP: 0018:ffff8801db707c50 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff8801db721000 RCX: ffff8801db721000
RDX: 0000000000000000 RSI: ffffffff81bcd2ac RDI: ffff8801a9d5981c
RBP: ffff8801db707c98 R08: ffff8801db7218f0 R09: 0000000000000003
R10: ffff8801cf668270 R11: 00000042adfd121a R12: ffffffff82a4ca80
R13: ffffffff82a4ca80 R14: 0000000000000000 R15: ffff8801a9d597c0
FS: 00007f4c2ff4e700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000201c1000 CR3: 00000001c73f3000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
ffff8801cf668288 c ffff8801db721170 c ffff8801db7218f0 c ffff8801db721000 c
ffff8801db721000 c ffff8801cf668000 c ffff8801db707d80 c 0000000000000000 c
ffff8801cf6687f8 c ffff8801db707cd8 c ffffffff81174b7f c ffffffff8117409a c
Call Trace:
<IRQ> d [<000000002376f83a>] ttwu_do_wakeup.isra.0+0x1f/0x580
kernel/sched/core.c:1707
[<0000000085645ac8>] ttwu_do_activate+0x154/0x200 kernel/sched/core.c:1753
[<00000000f676b07c>] ttwu_queue kernel/sched/core.c:1908 [inline]
[<00000000f676b07c>] try_to_wake_up+0x5a3/0x1030 kernel/sched/core.c:2122
[<0000000099c2eec4>] wake_up_process+0x10/0x20 kernel/sched/core.c:2197
[<000000004a793869>] hrtimer_wakeup+0x48/0x60 kernel/time/hrtimer.c:1476
[<00000000bb1d690f>] __run_hrtimer kernel/time/hrtimer.c:1255 [inline]
[<00000000bb1d690f>] __hrtimer_run_queues+0x313/0xe00
kernel/time/hrtimer.c:1319
[<00000000fbb5c62a>] hrtimer_interrupt+0x1b6/0x450
kernel/time/hrtimer.c:1353
[<00000000028425ba>] local_apic_timer_interrupt+0x76/0xa0
arch/x86/kernel/apic/apic.c:937
[<00000000ff1e574e>] smp_apic_timer_interrupt+0x79/0xb0
arch/x86/kernel/apic/apic.c:961
[<000000003a8e397b>] apic_timer_interrupt+0xa5/0xb0
arch/x86/entry/entry_64.S:653
<EOI> d [<00000000cb094bbe>] ? arch_local_irq_restore
arch/x86/include/asm/paravirt.h:768 [inline]
<EOI> d [<00000000cb094bbe>] ? lock_acquire+0x176/0x3d0
kernel/locking/lockdep.c:3759
[<00000000448bb6ae>] down_read+0x44/0xb0 kernel/locking/rwsem.c:22
[<000000007f5cbf92>] ext4_page_mkwrite+0x1a5/0x1040 fs/ext4/inode.c:5768
[<00000000ecd89c9f>] do_page_mkwrite+0x1d1/0x400 mm/memory.c:2061
[<00000000efe1e017>] wp_page_shared mm/memory.c:2326 [inline]
[<00000000efe1e017>] do_wp_page+0xab8/0x20a0 mm/memory.c:2430
[<00000000f53a0c0e>] handle_pte_fault mm/memory.c:3562 [inline]
[<00000000f53a0c0e>] __handle_mm_fault mm/memory.c:3634 [inline]
[<00000000f53a0c0e>] handle_mm_fault+0xeff/0x2420 mm/memory.c:3671
[<000000000dd18bd1>] __do_page_fault+0x3f0/0xa60 arch/x86/mm/fault.c:1401
[<000000002208325f>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1464
[<000000007765be44>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:956
[<000000007b24413d>] pipe_to_user+0xb0/0x160 fs/splice.c:1256
[<00000000efac710f>] splice_from_pipe_feed fs/splice.c:521 [inline]
[<00000000efac710f>] __splice_from_pipe+0x351/0x790 fs/splice.c:645
[<00000000c1819c92>] vmsplice_to_user+0x1bd/0x1e0 fs/splice.c:1291
[<000000008ea6c812>] SYSC_vmsplice fs/splice.c:1370 [inline]
[<000000008ea6c812>] SyS_vmsplice+0x114/0x140 fs/splice.c:1353
[<000000005d5048d5>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
[<0000000028008a47>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: cd0 c7c c08 c84 cd2 c0f c85 c4a c01 c00 c00 c41 c83 c7f
c5c c01 c74 c0f c48 c83 cc4 c20 c5b c41 c5c c41 c5d c41 c5e
c41 c5f c5d cc3 c48 cb8 c00 c00 c00 c00 c00 cfc cff cdf
c<4c> c89 cfa c48 cc1 cea c03 c80 c3c c02 c00 c0f c85 c41
c02 c00 c00 c49 c8b c07 ca8 c
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Dec 30, 2019, 5:08:06 PM12/30/19
to syzkaller-a...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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