* [PATCH] mwifiex: avoid out of bounds access in mwifiex_get_common_rates.
@ 2013-01-27 22:42 Cyril Roelandt
[not found] ` <1359326568-17022-1-git-send-email-tipecaml-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
0 siblings, 1 reply; 2+ messages in thread
From: Cyril Roelandt @ 2013-01-27 22:42 UTC (permalink / raw)
To: bzhao, linville
Cc: linux-wireless, netdev, linux-kernel, kernel-janitors,
Cyril Roelandt
Check that the array indexes are in-bounds before accessing the rate2 and tmp
arrays.
Found with the following semantic patch:
<smpl>
@@
identifier t;
identifier idx;
expression E;
statement S;
@@
* for (... ; <+... t[idx] ...+> && idx < E ; ...)
S
</smpl>
Signed-off-by: Cyril Roelandt <tipecaml@gmail.com>
---
drivers/net/wireless/mwifiex/join.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/mwifiex/join.c b/drivers/net/wireless/mwifiex/join.c
index 893d809..f0a634d 100644
--- a/drivers/net/wireless/mwifiex/join.c
+++ b/drivers/net/wireless/mwifiex/join.c
@@ -157,8 +157,8 @@ static int mwifiex_get_common_rates(struct mwifiex_private *priv, u8 *rate1,
memset(rate1, 0, rate1_size);
- for (i = 0; rate2[i] && i < rate2_size; i++) {
- for (j = 0; tmp[j] && j < rate1_size; j++) {
+ for (i = 0; i < rate2_size && rate2[i]; i++) {
+ for (j = 0; j < rate1_size && tmp[j]; j++) {
/* Check common rate, excluding the bit for
basic rate */
if ((rate2[i] & 0x7F) == (tmp[j] & 0x7F)) {
--
1.7.10.4
^ permalink raw reply related [flat|nested] 2+ messages in thread[parent not found: <1359326568-17022-1-git-send-email-tipecaml-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]
* RE: [PATCH] mwifiex: avoid out of bounds access in mwifiex_get_common_rates. [not found] ` <1359326568-17022-1-git-send-email-tipecaml-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> @ 2013-01-28 18:53 ` Bing Zhao 0 siblings, 0 replies; 2+ messages in thread From: Bing Zhao @ 2013-01-28 18:53 UTC (permalink / raw) To: Cyril Roelandt, linville-2XuSBdqkA4R54TAoqtyWWQ@public.gmane.org Cc: linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kernel-janitors-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Hi Cyril, Thanks for your patch. > Check that the array indexes are in-bounds before accessing the rate2 and tmp > arrays. > > Found with the following semantic patch: > > <smpl> > @@ > identifier t; > identifier idx; > expression E; > statement S; > @@ > * for (... ; <+... t[idx] ...+> && idx < E ; ...) > S > </smpl> > > Signed-off-by: Cyril Roelandt <tipecaml-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> Acked-by: Bing Zhao <bzhao-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org> Thanks, Bing > --- > drivers/net/wireless/mwifiex/join.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/net/wireless/mwifiex/join.c b/drivers/net/wireless/mwifiex/join.c > index 893d809..f0a634d 100644 > --- a/drivers/net/wireless/mwifiex/join.c > +++ b/drivers/net/wireless/mwifiex/join.c > @@ -157,8 +157,8 @@ static int mwifiex_get_common_rates(struct mwifiex_private *priv, u8 *rate1, > > memset(rate1, 0, rate1_size); > > - for (i = 0; rate2[i] && i < rate2_size; i++) { > - for (j = 0; tmp[j] && j < rate1_size; j++) { > + for (i = 0; i < rate2_size && rate2[i]; i++) { > + for (j = 0; j < rate1_size && tmp[j]; j++) { > /* Check common rate, excluding the bit for > basic rate */ > if ((rate2[i] & 0x7F) == (tmp[j] & 0x7F)) { > -- > 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 2+ messages in thread
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2013-01-27 22:42 [PATCH] mwifiex: avoid out of bounds access in mwifiex_get_common_rates Cyril Roelandt
[not found] ` <1359326568-17022-1-git-send-email-tipecaml-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-01-28 18:53 ` Bing Zhao
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