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| author | Zhang Shurong <zhang_shurong@foxmail.com> | 2023-06-25 00:16:49 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-30 16:31:52 +0200 |
| commit | e32b0ad436819927cccc5d774edf675ac7bb310f (patch) | |
| tree | 8a20d28f93a01f4a6423d7f291563ea025262169 /kernel | |
| parent | 1d41b658533dbfd9a52eba14e51d0f549083b448 (diff) | |
fbdev: fix potential OOB read in fast_imageblit()
[ Upstream commit c2d22806aecb24e2de55c30a06e5d6eb297d161d ]
There is a potential OOB read at fast_imageblit, for
"colortab[(*src >> 4)]" can become a negative value due to
"const char *s = image->data, *src".
This change makes sure the index for colortab always positive
or zero.
Similar commit:
https://patchwork.kernel.org/patch/11746067
Potential bug report:
https://groups.google.com/g/syzkaller-bugs/c/9ubBXKeKXf4/m/k-QXy4UgAAAJ
Signed-off-by: Zhang Shurong <zhang_shurong@foxmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions