WARNING in rcu_note_context_switch
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syzbot
Oct 1, 2019, 4:09:08 AM10/1/19
to dvh...@infradead.org, linux-...@vger.kernel.org, mi...@redhat.com, pet...@infradead.org, syzkall...@googlegroups.com, tg...@linutronix.de
Hello,
syzbot found the following crash on:
HEAD commit: 54ecb8f7 Linux 5.4-rc1
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14972bf3600000
kernel config: https://syzkaller.appspot.com/x/.config?x=fb0b431ccdf08c1c
dashboard link: https://syzkaller.appspot.com/bug?extid=0e1a9dce275f13907b4e
compiler: clang version 9.0.0 (/home/glider/llvm/clang
80fee25776c2fb61e74c1ecb1a523375c2500b69)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16875a35600000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=104bd519600000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0e1a9d...@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 1 PID: 7994 at kernel/rcu/tree_plugin.h:293
rcu_note_context_switch+0xdde/0xee0 kernel/rcu/tree_plugin.h:293
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 7994 Comm: syz-executor640 Not tainted 5.4.0-rc1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d8/0x2f8 lib/dump_stack.c:113
panic+0x25c/0x799 kernel/panic.c:220
__warn+0x20e/0x210 kernel/panic.c:581
report_bug+0x1b6/0x2f0 lib/bug.c:195
fixup_bug arch/x86/kernel/traps.c:179 [inline]
do_error_trap+0xd7/0x440 arch/x86/kernel/traps.c:272
do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:291
invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028
RIP: 0010:rcu_note_context_switch+0xdde/0xee0 kernel/rcu/tree_plugin.h:293
Code: c8 73 4b 00 e9 b8 f3 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 22 f3
ff ff 48 89 df e8 4b 73 4b 00 83 3b 00 0f 8e 1a f3 ff ff <0f> 0b e9 13 f3
ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c c9 f2 ff
RSP: 0018:ffff8880a929f838 EFLAGS: 00010002
RAX: 1ffff110126bc800 RBX: ffff8880935e46f8 RCX: ffffffff81608604
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff88be39a0
RBP: ffff8880a929f918 R08: dffffc0000000000 R09: fffffbfff117c735
R10: fffffbfff117c735 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880935e4380 R14: 0000000000000000 R15: ffff8880aeb35740
__schedule+0xce/0xb80 kernel/sched/core.c:4007
schedule+0x131/0x1e0 kernel/sched/core.c:4136
freezable_schedule include/linux/freezer.h:172 [inline]
futex_wait_queue_me+0x2a3/0x4b0 kernel/futex.c:2627
futex_wait+0x252/0x770 kernel/futex.c:2733
do_futex+0x42a/0x3de0 kernel/futex.c:3644
__do_sys_futex kernel/futex.c:3705 [inline]
__se_sys_futex+0x28c/0x360 kernel/futex.c:3673
__x64_sys_futex+0xe5/0x100 kernel/futex.c:3673
do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x446709
Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ff032150db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446709
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc28
RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c
R13: 00007ffcc4d0fa9f R14: 00007ff0321519c0 R15: 000000000000002d
Kernel Offset: disabled
Rebooting in 86400 seconds..
---
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 can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
syzbot found the following crash on:
HEAD commit: 54ecb8f7 Linux 5.4-rc1
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14972bf3600000
kernel config: https://syzkaller.appspot.com/x/.config?x=fb0b431ccdf08c1c
dashboard link: https://syzkaller.appspot.com/bug?extid=0e1a9dce275f13907b4e
compiler: clang version 9.0.0 (/home/glider/llvm/clang
80fee25776c2fb61e74c1ecb1a523375c2500b69)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16875a35600000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=104bd519600000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0e1a9d...@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 1 PID: 7994 at kernel/rcu/tree_plugin.h:293
rcu_note_context_switch+0xdde/0xee0 kernel/rcu/tree_plugin.h:293
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 7994 Comm: syz-executor640 Not tainted 5.4.0-rc1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d8/0x2f8 lib/dump_stack.c:113
panic+0x25c/0x799 kernel/panic.c:220
__warn+0x20e/0x210 kernel/panic.c:581
report_bug+0x1b6/0x2f0 lib/bug.c:195
fixup_bug arch/x86/kernel/traps.c:179 [inline]
do_error_trap+0xd7/0x440 arch/x86/kernel/traps.c:272
do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:291
invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028
RIP: 0010:rcu_note_context_switch+0xdde/0xee0 kernel/rcu/tree_plugin.h:293
Code: c8 73 4b 00 e9 b8 f3 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 22 f3
ff ff 48 89 df e8 4b 73 4b 00 83 3b 00 0f 8e 1a f3 ff ff <0f> 0b e9 13 f3
ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c c9 f2 ff
RSP: 0018:ffff8880a929f838 EFLAGS: 00010002
RAX: 1ffff110126bc800 RBX: ffff8880935e46f8 RCX: ffffffff81608604
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff88be39a0
RBP: ffff8880a929f918 R08: dffffc0000000000 R09: fffffbfff117c735
R10: fffffbfff117c735 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880935e4380 R14: 0000000000000000 R15: ffff8880aeb35740
__schedule+0xce/0xb80 kernel/sched/core.c:4007
schedule+0x131/0x1e0 kernel/sched/core.c:4136
freezable_schedule include/linux/freezer.h:172 [inline]
futex_wait_queue_me+0x2a3/0x4b0 kernel/futex.c:2627
futex_wait+0x252/0x770 kernel/futex.c:2733
do_futex+0x42a/0x3de0 kernel/futex.c:3644
__do_sys_futex kernel/futex.c:3705 [inline]
__se_sys_futex+0x28c/0x360 kernel/futex.c:3673
__x64_sys_futex+0xe5/0x100 kernel/futex.c:3673
do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x446709
Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ff032150db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446709
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc28
RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c
R13: 00007ffcc4d0fa9f R14: 00007ff0321519c0 R15: 000000000000002d
Kernel Offset: disabled
Rebooting in 86400 seconds..
---
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 can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
Peter Zijlstra
Oct 1, 2019, 4:45:26 AM10/1/19
to syzbot, dvh...@infradead.org, linux-...@vger.kernel.org, mi...@redhat.com, syzkall...@googlegroups.com, tg...@linutronix.de
On Tue, Oct 01, 2019 at 01:09:07AM -0700, syzbot wrote:
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: 54ecb8f7 Linux 5.4-rc1
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=14972bf3600000
> kernel config: https://syzkaller.appspot.com/x/.config?x=fb0b431ccdf08c1c
> dashboard link: https://syzkaller.appspot.com/bug?extid=0e1a9dce275f13907b4e
> compiler: clang version 9.0.0 (/home/glider/llvm/clang
> 80fee25776c2fb61e74c1ecb1a523375c2500b69)
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16875a35600000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=104bd519600000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+0e1a9d...@syzkaller.appspotmail.com
>
> ------------[ cut here ]------------
> WARNING: CPU: 1 PID: 7994 at kernel/rcu/tree_plugin.h:293
> rcu_note_context_switch+0xdde/0xee0 kernel/rcu/tree_plugin.h:293
> Kernel panic - not syncing: panic_on_warn set ...
https://lkml.kernel.org/r/2019100107...@hirez.programming.kicks-ass.net
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: 54ecb8f7 Linux 5.4-rc1
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=14972bf3600000
> kernel config: https://syzkaller.appspot.com/x/.config?x=fb0b431ccdf08c1c
> dashboard link: https://syzkaller.appspot.com/bug?extid=0e1a9dce275f13907b4e
> compiler: clang version 9.0.0 (/home/glider/llvm/clang
> 80fee25776c2fb61e74c1ecb1a523375c2500b69)
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16875a35600000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=104bd519600000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+0e1a9d...@syzkaller.appspotmail.com
>
> ------------[ cut here ]------------
> WARNING: CPU: 1 PID: 7994 at kernel/rcu/tree_plugin.h:293
> rcu_note_context_switch+0xdde/0xee0 kernel/rcu/tree_plugin.h:293
> Kernel panic - not syncing: panic_on_warn set ...
Eric Biggers
Oct 3, 2019, 8:54:58 PM10/3/19
to syzbot, syzkall...@googlegroups.com
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