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| author | Manuel Schölling <manuel.schoelling@gmx.de> | 2014-06-07 23:57:25 +0200 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-07-29 17:01:40 +0200 |
| commit | d48784b054635ec818cfe3959249de5b2f43ea6a (patch) | |
| tree | 7f0cbc5a9ed63e8fca21887fa9aff6d83cb9f225 | |
| parent | 54a445fe7a86aad6d62913ae497eaa392880ed9d (diff) | |
dns_resolver: assure that dns_query() result is null-terminated
[ Upstream commit 84a7c0b1db1c17d5ded8d3800228a608e1070b40 ]
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>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
| -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 c32be292c7e3..ede0e2d7412e 100644 --- a/net/dns_resolver/dns_query.c +++ b/net/dns_resolver/dns_query.c @@ -150,7 +150,9 @@ 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; |