[syzbot] [perf?] WARNING in perf_event_open

syzbot
2023-12-20T10:01:26Z

Hello,

syzbot found the following issue on:

HEAD commit: 441c725ed592 selftests/bpf: Close cgrp fd before calling c..
git tree: bpf-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1444d11ae80000
kernel config: https://syzkaller.appspot.com/x/.config?x=8f565e10f0b1e1fc
dashboard link: https://syzkaller.appspot.com/bug?extid=07144c543a5c002c7305
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/8b0f45da11b1/disk-441c725e.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2a5034980240/vmlinux-441c725e.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2daadb549a4c/bzImage-441c725e.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+07144c543a5c002c7305@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 5193 at kernel/events/core.c:1950 perf_event_validate_size kernel/events/core.c:1950 [inline]
WARNING: CPU: 1 PID: 5193 at kernel/events/core.c:1950 __do_sys_perf_event_open+0x2748/0x2c70 kernel/events/core.c:12655
Modules linked in:
CPU: 1 PID: 5193 Comm: syz-executor.5 Not tainted 6.7.0-rc5-syzkaller-01532-g441c725ed592 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:perf_event_validate_size kernel/events/core.c:1950 [inline]
RIP: 0010:__do_sys_perf_event_open+0x2748/0x2c70 kernel/events/core.c:12655
Code: ff 48 8d b8 a8 00 00 00 e8 85 0a cf 08 bf 01 00 00 00 89 c3 89 c6 e8 77 74 d5 ff 83 eb 01 0f 84 2d ed ff ff e8 f9 78 d5 ff 90 <0f> 0b 90 e9 1f ed ff ff e8 eb 78 d5 ff be 03 00 00 00 48 89 ef e8
RSP: 0018:ffffc90005187d90 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 00000000ffffffff RCX: ffffc90003d11000
RDX: 0000000000040000 RSI: ffffffff81b224a7 RDI: 0000000000000005
RBP: ffff888077570000 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff915e51d0 R12: ffff8880291ffb00
R13: 1ffff92000a30fbd R14: ffff88807a94d940 R15: ffff888077570000
FS: 00007fa10795c6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000002a097000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fa106c7cbe9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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:00007fa10795c0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fa106d9bf80 RCX: 00007fa106c7cbe9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007fa106cc847a R08: 0000000000000001 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa106d9bf80 R15: 00007fff36da3b98
</TASK>

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