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Date: Fri, 8 Aug 2014 13:41:20 -0700 From: Kamal Mostafa <kamal@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: Manuel Schölling <manuel.schoelling@....de>, "David S. Miller" <davem@...emloft.net>, Kamal Mostafa <kamal@...onical.com> Subject: [PATCH 3.13 257/259] dns_resolver: assure that dns_query() result is null-terminated 3.13.11.6 -stable review patch. If anyone has any objections, please let me know. ------------------ From: =?UTF-8?q?Manuel=20Sch=C3=B6lling?= <manuel.schoelling@....de> [ 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@....de> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Kamal Mostafa <kamal@...onical.com> --- net/dns_resolver/dns_query.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/dns_resolver/dns_query.c b/net/dns_resolver/dns_query.c index c32be29..ede0e2d 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; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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