From: "Dr. David Alan Gilbert" <[email protected]>
inet[46]_pton check the input length against
a sane length limit (INET[6]_ADDRSTRLEN), but
the strlen value gets truncated due to being stored in an int,
so there's a theoretical potential for a >4G string to pass
the limit test.
Use size_t since that's what strlen actually returns.
I've had a hunt for callers that could hit this, but
I've not managed to find anything that doesn't get checked with
some other limit first; but it's possible that I've missed
something in the depth of the storage target paths.
Signed-off-by: Dr. David Alan Gilbert <[email protected]>
---
net/core/utils.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/core/utils.c b/net/core/utils.c
index 938495bc1d348..c994e95172acf 100644
--- a/net/core/utils.c
+++ b/net/core/utils.c
@@ -302,7 +302,7 @@ static int inet4_pton(const char *src, u16 port_num,
struct sockaddr_storage *addr)
{
struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
- int srclen = strlen(src);
+ size_t srclen = strlen(src);
if (srclen > INET_ADDRSTRLEN)
return -EINVAL;
@@ -322,7 +322,7 @@ static int inet6_pton(struct net *net, const char *src, u16 port_num,
{
struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
const char *scope_delim;
- int srclen = strlen(src);
+ size_t srclen = strlen(src);
if (srclen > INET6_ADDRSTRLEN)
return -EINVAL;
--
2.37.3