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authorRoel Kluin <roel.kluin@gmail.com>2009-09-22 16:47:07 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-23 07:39:51 -0700
commitd63870db3c41086d7f13ec8b41def4331db32327 (patch)
tree9ad9322832081f3a5d15321c56dbd7b5d86e44c6
parent2f93e8f4822fdd48fa9c4c901eea87ab1c902f87 (diff)
sisfb: read buffer overflow
If called with mode_idx = 1, rate = 68, a read occurs from sisfb_vrate[-1].refresh. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Cc: Thomas Winischhofer <thomas@winischhofer.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/video/sis/sis_main.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/video/sis/sis_main.c b/drivers/video/sis/sis_main.c
index 4a067f0d0ce..a4e05e4d750 100644
--- a/drivers/video/sis/sis_main.c
+++ b/drivers/video/sis/sis_main.c
@@ -698,8 +698,8 @@ sisfb_search_refresh_rate(struct sis_video_info *ivideo, unsigned int rate, int
rate, sisfb_vrate[i].refresh);
ivideo->rate_idx = sisfb_vrate[i].idx;
ivideo->refresh_rate = sisfb_vrate[i].refresh;
- } else if(((rate - sisfb_vrate[i-1].refresh) <= 2)
- && (sisfb_vrate[i].idx != 1)) {
+ } else if((sisfb_vrate[i].idx != 1) &&
+ ((rate - sisfb_vrate[i-1].refresh) <= 2)) {
DPRINTK("sisfb: Adjusting rate from %d down to %d\n",
rate, sisfb_vrate[i-1].refresh);
ivideo->rate_idx = sisfb_vrate[i-1].idx;