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| author | Manuel Schölling <manuel.schoelling@gmx.de> | 2014-06-07 23:57:25 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-06-11 00:12:04 -0700 |
| commit | 84a7c0b1db1c17d5ded8d3800228a608e1070b40 (patch) | |
| tree | 95c67ab040a0fe4ade6d48902d6b5309c7f60370 /net/dns_resolver | |
| parent | 2346829e641b804ece9ac9298136b56d9567c278 (diff) | |
| download | lwn-84a7c0b1db1c17d5ded8d3800228a608e1070b40.tar.gz lwn-84a7c0b1db1c17d5ded8d3800228a608e1070b40.zip | |
dns_resolver: assure that dns_query() result is null-terminated
dns_query() credulously assumes that keys are null-terminated and
returns a copy of a memory block that is off by one.
Signed-off-by: Manuel Schölling <manuel.schoelling@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dns_resolver')
| -rw-r--r-- | net/dns_resolver/dns_query.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/dns_resolver/dns_query.c b/net/dns_resolver/dns_query.c index e7b6d53eef88..6853d22ebc07 100644 --- a/net/dns_resolver/dns_query.c +++ b/net/dns_resolver/dns_query.c @@ -149,7 +149,9 @@ int dns_query(const char *type, const char *name, size_t namelen, if (!*_result) goto put; - memcpy(*_result, upayload->data, len + 1); + memcpy(*_result, upayload->data, len); + *_result[len] = '\0'; + if (_expiry) *_expiry = rkey->expiry; |