bpf: Fix signed_{sub,add32}_overflows type handling
stable inclusion from stable-5.10.10 commit 5f52a8a71b62418d62c736e5aa68aaba0a8da918 bugzilla: 47610 -------------------------------- commit bc895e8b upstream. Fix incorrect signed_{sub,add32}_overflows() input types (and a related buggy comment). It looks like this might have slipped in via copy/paste issue, also given prior to 3f50f132 ("bpf: Verifier, do explicit ALU32 bounds tracking") the signature of signed_sub_overflows() had s64 a and s64 b as its input args whereas now they are truncated to s32. Thus restore proper types. Also, the case of signed_add32_overflows() is not consistent to signed_sub32_overflows(). Both have s32 as inputs, therefore align the former. Fixes: 3f50f132 ("bpf: Verifier, do explicit ALU32 bounds tracking") Reported-by: NDe4dCr0w <sa516203@mail.ustc.edu.cn> Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net> Reviewed-by: NJohn Fastabend <john.fastabend@gmail.com> Acked-by: NAlexei Starovoitov <ast@kernel.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com> Acked-by: NXie XiuQi <xiexiuqi@huawei.com>
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