diff options
| author | Manuel Schölling <manuel.schoelling@gmx.de> | 2014-06-07 23:57:25 +0200 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2014-08-06 18:07:39 +0100 |
| commit | bba876488ef0bde0844b411467b6cb7f37aff7f5 (patch) | |
| tree | a57723c4083e7be1246e2660e45e93555008ac05 /net/dns_resolver | |
| parent | 8b9b092799c87b251f7971cd08845d1d2d64e25b (diff) | |
| download | lwn-bba876488ef0bde0844b411467b6cb7f37aff7f5.tar.gz lwn-bba876488ef0bde0844b411467b6cb7f37aff7f5.zip | |
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: Ben Hutchings <ben@decadent.org.uk>
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 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; |