Hello, syzbot found the following issue on: HEAD commit: 9187210eee7d Merge tag 'net-next-6.9' of git://git.kernel... git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=1736a3da180000 kernel config: https://syzkaller.appspot.com/x/.config?x=222448ff79dba2ea dashboard link: https://syzkaller.appspot.com/bug?extid=d2a2c639d03ac200a4f1 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=16b3fdc1180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11201969180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/98c1ea7ddb95/disk-9187210e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/343c5524f68f/vmlinux-9187210e.xz kernel image: https://storage.googleapis.com/syzbot-assets/6c0c68b0ee90/bzImage-9187210e.xz The issue was bisected to: commit 011832b97b311bb9e3c27945bc0d1089a14209c9 Author: Alexei Starovoitov <ast@xxxxxxxxxx> Date: Wed Mar 6 03:19:26 2024 +0000 bpf: Introduce may_goto instruction bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=115e578e180000 final oops: https://syzkaller.appspot.com/x/report.txt?x=135e578e180000 console output: https://syzkaller.appspot.com/x/log.txt?x=155e578e180000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d2a2c639d03ac200a4f1@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 011832b97b31 ("bpf: Introduce may_goto instruction") ------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in kernel/bpf/core.c:2349:29 index 16 is out of range for type '<unknown> *[16]' CPU: 1 PID: 5060 Comm: syz-executor255 Not tainted 6.8.0-syzkaller-05202-g9187210eee7d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x125/0x1b0 lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:217 [inline] __ubsan_handle_out_of_bounds+0x110/0x150 lib/ubsan.c:415 bpf_prog_select_func kernel/bpf/core.c:2349 [inline] bpf_prog_select_runtime+0x5aa/0x640 kernel/bpf/core.c:2380 bpf_prog_load+0xf0f/0x2660 kernel/bpf/syscall.c:2899 __sys_bpf+0x9b4/0x4b40 kernel/bpf/syscall.c:5631 __do_sys_bpf kernel/bpf/syscall.c:5738 [inline] __se_sys_bpf kernel/bpf/syscall.c:5736 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5736 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fa2a0fe73e9 Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffdd829a698 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007ffdd829a878 RCX: 00007fa2a0fe73e9 RDX: 0000000000000048 RSI: 00000000200017c0 RDI: 0000000000000005 RBP: 00007fa2a105a610 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffdd829a868 R14: 0000000000000001 R15: 0000000000000001 </TASK> ---[ end trace ]--- --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the report is already addressed, 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 report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
