From: syzbot <syzbot+756fe9affda890e892ae@syzkaller.appspotmail.com>
To: acme@kernel.org, adrian.hunter@intel.com,
alexander.shishkin@linux.intel.com, bpf@vger.kernel.org,
irogers@google.com, jolsa@kernel.org,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
mark.rutland@arm.com, mingo@redhat.com, namhyung@kernel.org,
netdev@vger.kernel.org, peterz@infradead.org,
syzkaller-bugs@googlegroups.com
Subject: [syzbot] [perf?] general protection fault in inherit_task_group
Date: Tue, 31 Oct 2023 05:04:27 -0700 [thread overview]
Message-ID: <000000000000d9483d060901f460@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: c17cda15cc86 Merge tag 'net-6.6-rc8' of git://git.kernel.o..
git tree: bpf
console+strace: https://syzkaller.appspot.com/x/log.txt?x=151ab177680000
kernel config: https://syzkaller.appspot.com/x/.config?x=7d1f30869bb78ec6
dashboard link: https://syzkaller.appspot.com/bug?extid=756fe9affda890e892ae
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=103b572b680000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=143a82c3680000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d47cb341912c/disk-c17cda15.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/f37f0cf41858/vmlinux-c17cda15.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e256afecf3c3/bzImage-c17cda15.xz
The issue was bisected to:
commit 32671e3799ca2e4590773fd0e63aaa4229e50c06
Author: Peter Zijlstra <peterz@infradead.org>
Date: Wed Oct 18 11:56:54 2023 +0000
perf: Disallow mis-matched inherited group reads
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10fdf71d680000
final oops: https://syzkaller.appspot.com/x/report.txt?x=12fdf71d680000
console output: https://syzkaller.appspot.com/x/log.txt?x=14fdf71d680000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+756fe9affda890e892ae@syzkaller.appspotmail.com
Fixes: 32671e3799ca ("perf: Disallow mis-matched inherited group reads")
general protection fault, probably for non-canonical address 0xdffffc0000000011: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000088-0x000000000000008f]
CPU: 0 PID: 5052 Comm: syz-executor420 Not tainted 6.6.0-rc7-syzkaller-00089-gc17cda15cc86 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:inherit_group kernel/events/core.c:13375 [inline]
RIP: 0010:inherit_task_group.isra.0+0x248/0x5e0 kernel/events/core.c:13422
Code: 38 d0 7c 08 84 d2 0f 85 18 03 00 00 49 8d bf 8c 00 00 00 8b 9b 8c 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 eb
RSP: 0018:ffffc90003b1fa48 EFLAGS: 00010207
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000011 RSI: ffffffff81b0fbc9 RDI: 000000000000008c
RBP: ffff88801ce578a0 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000001 R11: ffffffff8a60008b R12: 0000000000000000
R13: ffff88807532bb80 R14: ffffc90003b1fae0 R15: 0000000000000000
FS: 00007f07e8df36c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f07e8df3fe8 CR3: 0000000078a1f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
perf_event_init_context kernel/events/core.c:13487 [inline]
perf_event_init_task+0x330/0x740 kernel/events/core.c:13538
copy_process+0x242c/0x73f0 kernel/fork.c:2475
kernel_clone+0xfd/0x920 kernel/fork.c:2909
__do_sys_clone+0xba/0x100 kernel/fork.c:3052
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f07e8e324d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f07e8df3228 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f07e8ebc308 RCX: 00007f07e8e324d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f07e8ebc300 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f07e8ebc30c
R13: 0000000000000016 R14: 00007ffca721dd10 R15: 00007ffca721ddf8
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:inherit_group kernel/events/core.c:13375 [inline]
RIP: 0010:inherit_task_group.isra.0+0x248/0x5e0 kernel/events/core.c:13422
Code: 38 d0 7c 08 84 d2 0f 85 18 03 00 00 49 8d bf 8c 00 00 00 8b 9b 8c 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 eb
RSP: 0018:ffffc90003b1fa48 EFLAGS: 00010207
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000011 RSI: ffffffff81b0fbc9 RDI: 000000000000008c
RBP: ffff88801ce578a0 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000001 R11: ffffffff8a60008b R12: 0000000000000000
R13: ffff88807532bb80 R14: ffffc90003b1fae0 R15: 0000000000000000
FS: 00007f07e8df36c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f07e8e5ef20 CR3: 0000000078a1f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 38 d0 cmp %dl,%al
2: 7c 08 jl 0xc
4: 84 d2 test %dl,%dl
6: 0f 85 18 03 00 00 jne 0x324
c: 49 8d bf 8c 00 00 00 lea 0x8c(%r15),%rdi
13: 8b 9b 8c 00 00 00 mov 0x8c(%rbx),%ebx
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx <-- trapping instruction
2e: 48 89 f8 mov %rdi,%rax
31: 83 e0 07 and $0x7,%eax
34: 83 c0 03 add $0x3,%eax
37: 38 d0 cmp %dl,%al
39: 7c 08 jl 0x43
3b: 84 d2 test %dl,%dl
3d: 0f .byte 0xf
3e: 85 eb test %ebp,%ebx
---
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@googlegroups.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
If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to overwrite bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
next reply other threads:[~2023-10-31 12:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-31 12:04 syzbot [this message]
2023-10-31 12:16 ` [syzbot] [perf?] general protection fault in inherit_task_group Peter Zijlstra
2023-11-29 12:17 ` syzbot
2023-11-29 12:21 ` Aleksandr Nogikh
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=000000000000d9483d060901f460@google.com \
--to=syzbot+756fe9affda890e892ae@syzkaller.appspotmail.com \
--cc=acme@kernel.org \
--cc=adrian.hunter@intel.com \
--cc=alexander.shishkin@linux.intel.com \
--cc=bpf@vger.kernel.org \
--cc=irogers@google.com \
--cc=jolsa@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-perf-users@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=mingo@redhat.com \
--cc=namhyung@kernel.org \
--cc=netdev@vger.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.