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selftests/net: fix EVP_MD_CTX leak in tcp_mmap

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In tcp_mmap.c, both child_thread() and main() allocate an EVP_MD_CTX
via EVP_MD_CTX_new() when integrity checking is enabled, but neither
function releases the context.  child_thread() misses the free in its
common cleanup block, and main() returns without freeing the context.

This results in a SHA256 context leak on every run that uses the
‑i (integrity) option.  Add the missing EVP_MD_CTX_free() calls to
the appropriate cleanup paths to fix the leak.

Fixes: 5c5945dc69 ("selftests/net: Add SHA256 computation over data sent in tcp_mmap")
Signed-off-by: Wang Yan <wangyan01@kylinos.cn>
Link: https://patch.msgid.link/20260702025949.442523-1-wangyan01@kylinos.cn
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Wang Yan 2026-07-02 10:59:49 +08:00 committed by Paolo Abeni
parent 6d27e29a90
commit f4ef35efbb
1 changed files with 4 additions and 0 deletions
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4
tools/testing/selftests/net/tcp_mmap.c
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@ -313,6 +313,8 @@ void *child_thread(void *arg)
tcp_info_get_rcv_mss(fd));
}
error:
if (ctx)
EVP_MD_CTX_free(ctx);
munmap(buffer, buffer_sz);
close(fd);
if (zflg)
@ -606,6 +608,8 @@ int main(int argc, char *argv[])
EVP_DigestFinal_ex(ctx, digest, &digest_len);
send(fd, digest, (size_t)SHA256_DIGEST_LENGTH, 0);
}
if (ctx)
EVP_MD_CTX_free(ctx);
close(fd);
munmap(buffer, buffer_sz);
return 0;