On 7/29/23 5:48 PM, syzbot wrote:
syzbot found the following issue on: HEAD commit: ec87f05402f5 octeontx2-af: Install TC filter rules in hard.. git tree: net-next console output:https://syzkaller.appspot.com/x/log.txt?x=12a76df1a80000 kernel config:https://syzkaller.appspot.com/x/.config?x=8acaeb93ad7c6aaa dashboard link:https://syzkaller.appspot.com/bug?extid=0c06ba0f831fe07a8f27 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/0fc53904fc08/disk-ec87f054.raw.xz vmlinux:https://storage.googleapis.com/syzbot-assets/aee64718ea5c/vmlinux-ec87f054.xz kernel image:https://storage.googleapis.com/syzbot-assets/d3b6d3f4cfbc/bzImage-ec87f054.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by:syzbot+0c06ba0f831fe07a8f27@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================================ UBSAN: array-index-out-of-bounds in ./include/linux/bpf_mprog.h:292:24 index 4294967295 is out of range for type 'bpf_mprog_fp [64]' CPU: 1 PID: 13232 Comm: syz-executor.1 Not tainted 6.5.0-rc2-syzkaller-00573-gec87f05402f5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 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+0x111/0x150 lib/ubsan.c:348 bpf_mprog_read include/linux/bpf_mprog.h:292 [inline] bpf_mprog_fetch kernel/bpf/mprog.c:307 [inline] bpf_mprog_detach+0xcd7/0xd50 kernel/bpf/mprog.c:381 tcx_prog_detach+0x258/0x950 kernel/bpf/tcx.c:78 bpf_prog_detach kernel/bpf/syscall.c:3877 [inline] __sys_bpf+0x36ee/0x4ec0 kernel/bpf/syscall.c:5357
Thanks for the report. I will take a look.
