From a88086e09876f468356cfec5319ff62004e36a1b Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Thu, 13 Apr 2017 22:42:31 +0300 Subject: net: off by one in inet6_pton() If "scope_len" is sizeof(scope_id) then we would put the NUL terminator one space beyond the end of the buffer. Fixes: b1a951fe469e ("net/utils: generic inet_pton_with_scope helper") Signed-off-by: Dan Carpenter Signed-off-by: Jens Axboe --- net/core/utils.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/core/utils.c b/net/core/utils.c index f96cf527bb8f..32c467cf52d6 100644 --- a/net/core/utils.c +++ b/net/core/utils.c @@ -339,7 +339,7 @@ static int inet6_pton(struct net *net, const char *src, u16 port_num, src + srclen != scope_delim && *scope_delim == '%') { struct net_device *dev; char scope_id[16]; - size_t scope_len = min_t(size_t, sizeof(scope_id), + size_t scope_len = min_t(size_t, sizeof(scope_id) - 1, src + srclen - scope_delim - 1); memcpy(scope_id, scope_delim + 1, scope_len); -- cgit v1.2.3-59-g8ed1b