syzbot

================================================================================
UBSAN: array-index-out-of-bounds in kernel/bpf/verifier.c:5393:12
index -1 is out of range for type 'u8[8]' (aka 'unsigned char[8]')
CPU: 0 PID: 294 Comm: syz-executor674 Not tainted 6.1.68-syzkaller-00062-g4292d259032a #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+0x151/0x1b7 lib/dump_stack.c:106
 dump_stack+0x15/0x1b lib/dump_stack.c:113
 ubsan_epilogue lib/ubsan.c:151 [inline]
 __ubsan_handle_out_of_bounds+0x13a/0x160 lib/ubsan.c:282
 check_stack_range_initialized+0x1349/0x1770 kernel/bpf/verifier.c:5393
 check_helper_mem_access+0x4c3/0xf80 kernel/bpf/verifier.c:5497
 check_helper_call+0x2fcf/0x6cd0 kernel/bpf/verifier.c:7564
 do_check+0x78b7/0xe040 kernel/bpf/verifier.c:12672
 do_check_common+0x6ce/0xed0 kernel/bpf/verifier.c:14940
 do_check_main kernel/bpf/verifier.c:15003 [inline]
 bpf_check+0x673b/0x16560 kernel/bpf/verifier.c:15577
 bpf_prog_load+0x1304/0x1bf0 kernel/bpf/syscall.c:2605
 __sys_bpf+0x52c/0x7f0 kernel/bpf/syscall.c:4972
 __do_sys_bpf kernel/bpf/syscall.c:5076 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5074 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5074
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4a48189629
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:00007ffee168eab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007ffee168ec88 RCX: 0000