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authorStefani Seibold <stefani@seibold.net>2009-08-06 15:07:30 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-08-07 10:39:55 -0700
commit93274e4d4e9416ad1fa47e2f26011e2c483fe5fe (patch)
tree0eab51b9489a19925bf03fa5f497eb8749df2645 /drivers/video
parent69dd647f969c28d18de77e2153f30d05a1874571 (diff)
fbcon: fix rotate upside down crash
Fix the rotate_ud() function not to crash in case of a font which has not a width of multiple by 8: The inner loop of the font pixel copy should not access a bit outside the font memory area. Subtract the shift offset from the font width will prevent this. Signed-off-by: Stefani Seibold <stefani@seibold.net> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/console/fbcon_rotate.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/video/console/fbcon_rotate.h b/drivers/video/console/fbcon_rotate.h
index 75be5ce53dc..e233444cda6 100644
--- a/drivers/video/console/fbcon_rotate.h
+++ b/drivers/video/console/fbcon_rotate.h
@@ -45,7 +45,7 @@ static inline void rotate_ud(const char *in, char *out, u32 width, u32 height)
width = (width + 7) & ~7;
for (i = 0; i < height; i++) {
- for (j = 0; j < width; j++) {
+ for (j = 0; j < width - shift; j++) {
if (pattern_test_bit(j, i, width, in))
pattern_set_bit(width - (1 + j + shift),
height - (1 + i),