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calipso: fix resource leak on calipso_genopt failure

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Currently, if calipso_genopt fails then the error exit path
does not free the ipv6_opt_hdr new causing a memory leak. Fix
this by kfree'ing new on the error exit path.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Colin Ian King 2016-08-11 18:17:22 +01:00 committed by David S. Miller
parent 747ea55e4f
commit b4c0e0c61f
1 changed files with 3 additions and 1 deletions
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4
net/ipv6/calipso.c
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@ -952,8 +952,10 @@ calipso_opt_insert(struct ipv6_opt_hdr *hop,
memcpy(new, hop, start);
ret_val = calipso_genopt((unsigned char *)new, start, buf_len, doi_def,
secattr);
if (ret_val < 0)
if (ret_val < 0) {
kfree(new);
return ERR_PTR(ret_val);
}
buf_len = start + ret_val;
/* At this point buf_len aligns to 4n, so (buf_len & 4) pads to 8n */