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selftests/bpf: Fix a fd leak in error paths in open_netns

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As Martin mentioned in review comment, there is an existing bug that
orig_netns_fd will be leaked in the later "goto fail;" case after
open("/proc/self/ns/net") in open_netns() in network_helpers.c. This
patch adds "close(token->orig_netns_fd);" before "free(token);" to
fix it.

Fixes: a30338840fa5 ("selftests/bpf: Move open_netns() and close_netns() into network_helpers.c")
Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Link: https://lore.kernel.org/r/a104040b47c3c34c67f3f125cdfdde244a870d3c.1713868264.git.tanggeliang@kylinos.cn
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
This commit is contained in:
Geliang Tang 2024-04-23 18:35:27 +08:00 committed by Martin KaFai Lau
parent 55d30cc90f
commit 151f744243
1 changed files with 2 additions and 0 deletions
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2
tools/testing/selftests/bpf/network_helpers.c
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@ -478,6 +478,8 @@ struct nstoken *open_netns(const char *name)
return token;
fail:
if (token->orig_netns_fd != -1)
close(token->orig_netns_fd);
free(token);
return NULL;
}