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Date: Sat, 7 Jun 2014 19:56:51 +0200 From: Manuel Schölling <manuel.schoelling@....de> To: davem@...emloft.net Cc: jeffrey.t.kirsher@...el.com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, Manuel Schölling <manuel.schoelling@....de> Subject: [PATCH] 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. --- 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 e7b6d53..53be635 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+1] = '\0'; + if (_expiry) *_expiry = rkey->expiry; -- 1.7.10.4 -- 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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