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bpf: allow . char as part of the object name 

Trivial addition to allow '.' aside from '_' as "special" characters
in the object name. Used to allow for substrings in maps from loader
side such as ".bss", ".data", ".rodata", but could also be useful for
other purposes.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
hifive-unleashed-5.2
Daniel Borkmann 2019-04-09 23:20:07 +02:00 committed by Alexei Starovoitov
parent 87df15de44
commit 3e0ddc4f3f
1 changed files with 3 additions and 3 deletions
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6
kernel/bpf/syscall.c
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@ -474,10 +474,10 @@ static int bpf_obj_name_cpy(char *dst, const char *src)
const char *end = src + BPF_OBJ_NAME_LEN;
memset(dst, 0, BPF_OBJ_NAME_LEN);
/* Copy all isalnum() and '_' char */
/* Copy all isalnum(), '_' and '.' chars. */
while (src < end && *src) {
if (!isalnum(*src) && *src != '_')
if (!isalnum(*src) &&
*src != '_' && *src != '.')
return -EINVAL;
*dst++ = *src++;
}