jeltz/hostap
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

RADIUS: Avoid undefined behavior in pointer arithmetic

Browse source 
Reorder terms in a way that no invalid pointers are generated with
pos+len operations. end-pos is always defined (with a valid pos pointer)
while pos+len could end up pointing beyond the end pointer which would
be undefined behavior.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2015-10-18 17:46:32 +03:00
parent d2eb91e08f
commit de7fe64df5
1 changed files with 1 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
src/radius/radius.c
View file

@ -704,7 +704,7 @@ struct radius_msg * radius_msg_parse(const u8 *data, size_t len)
attr = (struct radius_attr_hdr *) pos;
if (pos + attr->length > end || attr->length < sizeof(*attr))
if (attr->length > end - pos || attr->length < sizeof(*attr))
goto fail;
/* TODO: check that attr->length is suitable for attr->type */