linux-kernel - general protection fault in lockdep_invariant

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Date:   Wed, 08 Nov 2017 00:16:00 -0800
From:   syzbot 
        <bot+2e39c7a45268c036c9e90433a48c9dd550276dc6@...kaller.appspotmail.com>
To:     hpa@...or.com, jkosina@...e.cz, jpoimboe@...hat.com,
        linux-kernel@...r.kernel.org, luto@...nel.org,
        mark.rutland@....com, mingo@...hat.com, pmladek@...e.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        thgarnie@...gle.com, x86@...nel.org
Subject: general protection fault in lockdep_invariant_state (2)

Hello,

syzkaller hit the following crash on  
5a3517e009e979f21977d362212b7729c5165d92
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master
compiler: gcc (GCC) 7.1.1 20170620
.config is attached
Raw console output is attached.
C reproducer is attached
syzkaller reproducer is attached. See https://goo.gl/kgGztJ
for information about syzkaller reproducers


R13: 0000000000402260 R14: 00000000004022f0 R15: 0000000000000000
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
    (ftrace buffer empty)
Modules linked in:
CPU: 3 PID: 2982 Comm: syzkaller521009 Not tainted  
4.14.0-rc7-next-20171103+ #10
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
task: ffff88003d6b25c0 task.stack: ffff88003abd0000
RIP: 0010:invalidate_xhlock kernel/locking/lockdep.c:4719 [inline]
RIP: 0010:lockdep_invariant_state+0xd6/0x120 kernel/locking/lockdep.c:4793
RSP: 0018:ffff88003abd7e38 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: 0000000000001d88 RCX: ffffffff81008d3f
RDX: 00000000000003bc RSI: 0000000000000000 RDI: 0000000000001de0
RBP: ffff88003abd7e48 R08: ffffffff85f3b680 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88003abd7ee0 R14: ffff88003d6b25c0 R15: ffffffff85ecb390
FS:  0000000002024880(0000) GS:ffff88006df00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005585762cd008 CR3: 000000003a704000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
  lockdep_sys_exit+0x47/0xf0 kernel/locking/lockdep.c:4629
  prepare_exit_to_usermode arch/x86/entry/common.c:192 [inline]
  syscall_return_slowpath+0x244/0x510 arch/x86/entry/common.c:266
  ret_from_fork+0x15/0x40 arch/x86/entry/entry_64.S:424
RIP: 0033:0x4358a9
RSP: 002b:0000000020218fa0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00000000004358a9
RDX: 0000000020acc000 RSI: 0000000020218fa0 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00000000201fa000 R09: 0000000000000000
R10: 000000002097b000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000402260 R14: 00000000004022f0 R15: 0000000000000000
Code: 83 90 11 00 00 83 e0 3f 48 89 c2 48 c1 e2 04 48 29 c2 48 b8 00 00 00  
00 00 fc ff df 49 8d 1c d4 48 8d 7b 58 48 89 fa 48 c1 ea 03 <80> 3c 02 00  
75 2f 48 c7 43 58 00 00 00 00 5b 41 5c 5d c3 0f ff
RIP: invalidate_xhlock kernel/locking/lockdep.c:4719 [inline] RSP:  
ffff88003abd7e38
RIP: lockdep_invariant_state+0xd6/0x120 kernel/locking/lockdep.c:4793 RSP:  
ffff88003abd7e38
---[ end trace b75e41873a1a07c3 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
    (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..


---
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See https://goo.gl/tpsmEJ for details.
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