------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in kernel/bpf/verifier.c:7182:39 index -1 is out of range for type 'u8 [8]' CPU: 2 PID: 9367 Comm: syz-executor.1 Not tainted 6.8.0-syzkaller-11567-gb3603fcb79b1 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:114 ubsan_epilogue lib/ubsan.c:217 [inline] __ubsan_handle_out_of_bounds+0x110/0x150 lib/ubsan.c:415 check_stack_range_initialized+0xd51/0xfd0 kernel/bpf/verifier.c:7182 check_helper_mem_access+0x1d9/0xda0 kernel/bpf/verifier.c:7286 check_func_arg kernel/bpf/verifier.c:8716 [inline] check_helper_call.isra.0+0x1e8b/0xa090 kernel/bpf/verifier.c:10244 do_check kernel/bpf/verifier.c:17793 [inline] do_check_common+0x5c84/0xc860 kernel/bpf/verifier.c:20492 do_check_main kernel/bpf/verifier.c:20583 [inline] bpf_check+0x7279/0xa8b0 kernel/bpf/verifier.c:21253 bpf_prog_load+0xedb/0x2660 kernel/bpf/syscall.c:2895 __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: 0033:0x7fcb8d07dda9 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:00007fcb8dd680c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fcb8d1abf80 RCX: 00007fcb8d07dda9 RDX: 0000000000000090 RSI: 00000000200000c0 RDI: 0000000000000005 RBP: 00007fcb8d0ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fcb8d1abf80 R15: 00007ffe0ea93478 ---[ end trace ]---