On 09/08/2015 10:40 PM, Alexei Starovoitov wrote:
when the verifier log is enabled the print_bpf_insn() is doing
bpf_alu_string[BPF_OP(insn->code) >> 4]
and
bpf_jmp_string[BPF_OP(insn->code) >> 4]
where BPF_OP is a 4-bit instruction opcode.
Malformed insns can cause out of bounds access.
Fix it by sizing arrays appropriately.
The bug was found by clang address sanitizer with libfuzzer.
Reported-by: Yonghong Song <y...@plumgrid.com>
Signed-off-by: Alexei Starovoitov <a...@plumgrid.com>
Acked-by: Daniel Borkmann <dan...@iogearbox.net>
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