================================================================================ UBSAN: array-index-out-of-bounds in kernel/bpf/disasm.c:192:38 index -1 is out of range for type 'char *[4]' CPU: 1 PID: 2792 Comm: syz-executor.0 Not tainted 6.5.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x3d/0x60 lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:217 [inline] __ubsan_handle_out_of_bounds+0xcb/0x100 lib/ubsan.c:348 print_bpf_insn+0x9cc/0x9e0 kernel/bpf/disasm.c:192 do_check kernel/bpf/verifier.c:16505 [inline] do_check_common+0x5f5/0x3c30 kernel/bpf/verifier.c:19061 do_check_main kernel/bpf/verifier.c:19124 [inline] bpf_check+0x2219/0x2f90 kernel/bpf/verifier.c:19748 bpf_prog_load+0x81b/0xc70 kernel/bpf/syscall.c:2709 __sys_bpf+0x739/0x25d0 kernel/bpf/syscall.c:5345 __do_sys_bpf kernel/bpf/syscall.c:5449 [inline] __se_sys_bpf kernel/bpf/syscall.c:5447 [inline] __x64_sys_bpf+0x19/0x20 kernel/bpf/syscall.c:5447 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: 0033:0x7fb5746b5b29 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:00007fb5742380c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fb5747d4f80 RCX: 00007fb5746b5b29 RDX: 0000000000000048 RSI: 0000000020000080 RDI: 0000000000000005 RBP: 00007fb57470147a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fb5747d4f80 R15: 00007ffeefd64758 ================================================================================