From: syzbot <syzbot+a41ac89a0712acde0e84@syzkaller.appspotmail.com>
To: acme@kernel.org, alexander.shishkin@linux.intel.com,
jolsa@redhat.com, linux-kernel@vger.kernel.org, mingo@redhat.com,
namhyung@kernel.org, peterz@infradead.org,
syzkaller-bugs@googlegroups.com
Subject: INFO: rcu detected stall in __perf_sw_event
Date: Thu, 07 Feb 2019 07:07:05 -0800 [thread overview]
Message-ID: <00000000000003cadb05814f3284@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: b0314565da2b Merge tag 'for_linus' of git://git.kernel.org..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15cd5e73400000
kernel config: https://syzkaller.appspot.com/x/.config?x=8f00801d7b7c4fe6
dashboard link: https://syzkaller.appspot.com/bug?extid=a41ac89a0712acde0e84
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1707cd2f400000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+a41ac89a0712acde0e84@syzkaller.appspotmail.com
8021q: adding VLAN 0 to HW filter on device batadv0
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (10499 ticks this GP) idle=d02/1/0x4000000000000002
softirq=13779/13779 fqs=5238
rcu: (t=10500 jiffies g=11657 q=1546)
NMI backtrace for cpu 0
CPU: 0 PID: 9826 Comm: syz-executor0 Not tainted 5.0.0-rc5+ #61
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+0x172/0x1f0 lib/dump_stack.c:113
nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree.c:1211
print_cpu_stall kernel/rcu/tree.c:1348 [inline]
check_cpu_stall kernel/rcu/tree.c:1422 [inline]
rcu_pending kernel/rcu/tree.c:3018 [inline]
rcu_check_callbacks.cold+0x500/0xa4a kernel/rcu/tree.c:2521
update_process_times+0x32/0x80 kernel/time/timer.c:1635
tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161
tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271
__run_hrtimer kernel/time/hrtimer.c:1389 [inline]
__hrtimer_run_queues+0x33e/0xde0 kernel/time/hrtimer.c:1451
hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline]
smp_apic_timer_interrupt+0x120/0x570 arch/x86/kernel/apic/apic.c:1060
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
</IRQ>
RIP: 0010:memcpy_erms+0x8/0x10 arch/x86/lib/memcpy_64.S:56
Code: 90 90 eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5
89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 f3 a4 <c3> 0f 1f 80 00
00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 fe 7c 35
RSP: 0018:ffff88808fd171b8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff888092eb1798 RBX: 0000000000000868 RCX: 0000000000000000
RDX: 0000000000000010 RSI: ffff88808fd17348 RDI: ffff888092eb17a8
RBP: ffff88808fd171d8 R08: 1ffff110125d62f3 R09: ffffed10125d62f5
R10: ffffed10125d62f4 R11: ffff888092eb17a7 R12: 0000000000000010
R13: ffff888092eb1798 R14: ffff88808fd17338 R15: ffff88808fd17550
memcpy include/linux/string.h:352 [inline]
memcpy_common kernel/events/internal.h:172 [inline]
__output_copy kernel/events/internal.h:176 [inline]
perf_output_read_group kernel/events/core.c:6114 [inline]
perf_output_read+0xe16/0x1390 kernel/events/core.c:6147
perf_output_sample+0x13b9/0x1a90 kernel/events/core.c:6189
__perf_event_output kernel/events/core.c:6511 [inline]
perf_event_output_forward+0x150/0x290 kernel/events/core.c:6524
__perf_event_overflow+0x144/0x360 kernel/events/core.c:7768
perf_swevent_overflow+0xaa/0x140 kernel/events/core.c:7844
perf_swevent_event+0x1f7/0x2f0 kernel/events/core.c:7877
do_perf_sw_event kernel/events/core.c:7985 [inline]
___perf_sw_event+0x31c/0x570 kernel/events/core.c:8016
__perf_sw_event+0x51/0xa0 kernel/events/core.c:8028
perf_sw_event include/linux/perf_event.h:1054 [inline]
do_user_addr_fault arch/x86/mm/fault.c:1516 [inline]
__do_page_fault+0x734/0xd60 arch/x86/mm/fault.c:1541
do_page_fault+0x71/0x581 arch/x86/mm/fault.c:1572
page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1143
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20
arch/x86/lib/copy_user_64.S:181
Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f
80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 <f3> a4 31 c0 0f
1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83
RSP: 0018:ffff88808fd17b40 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 0000000000001000 RCX: 0000000000000340
RDX: 0000000000001000 RSI: 000000002081d000 RDI: ffff88808b047cc0
RBP: ffff88808fd17b78 R08: ffffed1011609000 R09: 0000000000000000
R10: ffffed1011608fff R11: ffff88808b047fff R12: 000000002081c340
R13: ffff88808b047000 R14: 000000002081d340 R15: 00007ffffffff000
copy_page_from_iter_iovec lib/iov_iter.c:294 [inline]
copy_page_from_iter+0x324/0x750 lib/iov_iter.c:907
pipe_write+0x27d/0xfb0 fs/pipe.c:429
call_write_iter include/linux/fs.h:1863 [inline]
new_sync_write fs/read_write.c:474 [inline]
__vfs_write+0x613/0x8e0 fs/read_write.c:487
vfs_write+0x20c/0x580 fs/read_write.c:549
ksys_write+0xea/0x1f0 fs/read_write.c:598
__do_sys_write fs/read_write.c:610 [inline]
__se_sys_write fs/read_write.c:607 [inline]
__x64_sys_write+0x73/0xb0 fs/read_write.c:607
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457e39
Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f21b6591c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e39
RDX: 0000000041395527 RSI: 0000000020000340 RDI: 0000000000000006
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f21b65926d4
R13: 00000000004c3c0e R14: 00000000004dc3a8 R15: 00000000ffffffff
---
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 syzkaller@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
next reply other threads:[~2019-02-07 15:07 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-07 15:07 syzbot [this message]
2019-03-26 23:04 ` INFO: rcu detected stall in __perf_sw_event syzbot
2019-03-26 23:28 ` Finn Thain
2019-03-28 8:21 ` Dmitry Vyukov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=00000000000003cadb05814f3284@google.com \
--to=syzbot+a41ac89a0712acde0e84@syzkaller.appspotmail.com \
--cc=acme@kernel.org \
--cc=alexander.shishkin@linux.intel.com \
--cc=jolsa@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=namhyung@kernel.org \
--cc=peterz@infradead.org \
--cc=syzkaller-bugs@googlegroups.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.