linux-kernel - BUG: unable to handle kernel paging request in x86_pmu_event

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Message-ID: <000000000000358a3d05ab795fe1@google.com>
Date:   Mon, 27 Jul 2020 22:04:20 -0700
From:   syzbot <syzbot+c01c3ea720877d228202@...kaller.appspotmail.com>
To:     acme@...nel.org, alexander.shishkin@...ux.intel.com, bp@...en8.de,
        hpa@...or.com, jolsa@...hat.com, linux-kernel@...r.kernel.org,
        mark.rutland@....com, mingo@...hat.com, namhyung@...nel.org,
        peterz@...radead.org, syzkaller-bugs@...glegroups.com,
        tglx@...utronix.de, x86@...nel.org
Subject: BUG: unable to handle kernel paging request in x86_pmu_event_init

Hello,

syzbot found the following issue on:

HEAD commit:    d15be546 Merge tag 'media/v5.8-3' of git://git.kernel.org/..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16380317100000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f3bc31881f1ae8a7
dashboard link: https://syzkaller.appspot.com/bug?extid=c01c3ea720877d228202
compiler:       clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=125be09c900000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=115ce01f100000

Bisection is inconclusive: the issue happens on the oldest tested release.

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=122b8228900000
final oops:     https://syzkaller.appspot.com/x/report.txt?x=112b8228900000
console output: https://syzkaller.appspot.com/x/log.txt?x=162b8228900000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c01c3ea720877d228202@...kaller.appspotmail.com

BUG: unable to handle page fault for address: ffffffffffffffe8
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 947c067 P4D 947c067 PUD 947e067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 3889 Comm: systemd-udevd Not tainted 5.8.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:x86_pmu_initialized arch/x86/events/core.c:297 [inline]
RIP: 0010:__x86_pmu_event_init arch/x86/events/core.c:594 [inline]
RIP: 0010:x86_pmu_event_init+0x95/0xac0 arch/x86/events/core.c:2140
Code: e8 30 5a 73 00 48 83 3d d8 cc 8b 08 00 75 1e e8 21 5a 73 00 bd ed ff ff ff e9 2a 07 00 00 e8 12 5a 73 00 48 83 3d ba cc 8b 08 <00> 74 e2 e8 43 7b ff ff 89 c5 31 ff 89 c6 e8 08 5e 73 00 85 ed 74
RSP: 0018:ffffc90001577f10 EFLAGS: 00010097
RAX: 0000000000000286 RBX: 0000000000004100 RCX: 2920ecf39a0bcf00
RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffffc90001577f58
RBP: 0000000000000000 R08: ffffffff814dec5e R09: ffffed1012f42c69
R10: ffffed1012f42c69 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffc90001577f58 R15: ffff8880a1c40080
FS:  00007f1b1fd358c0(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffe8 CR3: 00000000a26b6000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
Modules linked in:
CR2: ffffffffffffffe8
---[ end trace b1f79b2301ebd5ee ]---
RIP: 0010:x86_pmu_initialized arch/x86/events/core.c:297 [inline]
RIP: 0010:__x86_pmu_event_init arch/x86/events/core.c:594 [inline]
RIP: 0010:x86_pmu_event_init+0x95/0xac0 arch/x86/events/core.c:2140
Code: e8 30 5a 73 00 48 83 3d d8 cc 8b 08 00 75 1e e8 21 5a 73 00 bd ed ff ff ff e9 2a 07 00 00 e8 12 5a 73 00 48 83 3d ba cc 8b 08 <00> 74 e2 e8 43 7b ff ff 89 c5 31 ff 89 c6 e8 08 5e 73 00 85 ed 74
RSP: 0018:ffffc90001577f10 EFLAGS: 00010097
RAX: 0000000000000286 RBX: 0000000000004100 RCX: 2920ecf39a0bcf00
RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffffc90001577f58
RBP: 0000000000000000 R08: ffffffff814dec5e R09: ffffed1012f42c69
R10: ffffed1012f42c69 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffc90001577f58 R15: ffff8880a1c40080
FS:  00007f1b1fd358c0(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffe8 CR3: 00000000a26b6000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
This report 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@...glegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches