Hello, syzbot found the following issue on: HEAD commit: ca5ab9638e92 Merge branch 'selftests-classid' git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=110ef2c2680000 kernel config: https://syzkaller.appspot.com/x/.config?x=e82a7781f9208c0d dashboard link: https://syzkaller.appspot.com/bug?extid=2558ca3567a77b7af4e3 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/3410dfa76b34/disk-ca5ab963.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/993bfbc60422/vmlinux-ca5ab963.xz kernel image: https://storage.googleapis.com/syzbot-assets/40dff86d8c81/bzImage-ca5ab963.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2558ca3567a77b7af4e3@xxxxxxxxxxxxxxxxxxxxxxxxx 8021q: adding VLAN 0 to HW filter on device batadv38 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 14695 at include/linux/bpf_mprog.h:198 bpf_mprog_total include/linux/bpf_mprog.h:198 [inline] WARNING: CPU: 0 PID: 14695 at include/linux/bpf_mprog.h:198 bpf_mprog_pos_after+0x194/0x2b0 kernel/bpf/mprog.c:216 Modules linked in: CPU: 0 PID: 14695 Comm: syz-executor.3 Not tainted 6.5.0-syzkaller-12718-gca5ab9638e92 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 RIP: 0010:bpf_mprog_total include/linux/bpf_mprog.h:198 [inline] RIP: 0010:bpf_mprog_pos_after+0x194/0x2b0 kernel/bpf/mprog.c:216 Code: e8 03 42 80 3c 38 00 0f 85 f2 00 00 00 4d 3b 65 00 0f 85 26 ff ff ff e8 3a 55 e3 ff 8d 43 01 89 44 24 14 eb 48 e8 2c 55 e3 ff <0f> 0b e9 36 ff ff ff e8 20 55 e3 ff 4c 89 f2 48 b8 00 00 00 00 00 RSP: 0018:ffffc90004d87ac8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888043c88000 RSI: ffffffff81a47c94 RDI: 0000000000000005 RBP: 0000000000000040 R08: 0000000000000005 R09: 000000000000003f R10: 0000000000000040 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888042c89418 R14: ffffc90004d87b98 R15: dffffc0000000000 FS: 00007f51b80af6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30823000 CR3: 0000000026678000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> bpf_mprog_attach+0x433/0xfe0 kernel/bpf/mprog.c:266 tcx_prog_attach+0x2bd/0xbd0 kernel/bpf/tcx.c:39 bpf_prog_attach kernel/bpf/syscall.c:3848 [inline] __sys_bpf+0x413e/0x4e90 kernel/bpf/syscall.c:5344 __do_sys_bpf kernel/bpf/syscall.c:5439 [inline] __se_sys_bpf kernel/bpf/syscall.c:5437 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5437 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: 0033:0x7f51b727cae9 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:00007f51b80af0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f51b739bf80 RCX: 00007f51b727cae9 RDX: 0000000000000020 RSI: 0000000020000140 RDI: 0000000000000008 RBP: 00007f51b72c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f51b739bf80 R15: 00007ffe27bee9b8 </TASK> --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title 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
