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bpf: Fix a crash when btf_parse_base() returns an error pointer

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The pointer returned by btf_parse_base could be an error pointer.
IS_ERR() check is needed before calling btf_free(base_btf).

Fixes: 8646db238997 ("libbpf,bpf: Share BTF relocate-related code with kernel")
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Alan Maguire <alan.maguire@oracle.com>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/bpf/20240830012214.1646005-1-martin.lau@linux.dev
This commit is contained in:
Martin KaFai Lau 2024-08-29 18:22:14 -07:00 committed by Andrii Nakryiko
parent 872cf28b8d
commit b408473ea0
1 changed files with 1 additions and 1 deletions
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2
kernel/bpf/btf.c
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@ -6283,7 +6283,7 @@ static struct btf *btf_parse_module(const char *module_name, const void *data,
errout:
btf_verifier_env_free(env);
if (base_btf != vmlinux_btf)
if (!IS_ERR(base_btf) && base_btf != vmlinux_btf)
btf_free(base_btf);
if (btf) {
kvfree(btf->data);