commit | bd018a6a75cebb511bb55a0e7690024be975fe93 | [log] [tgz] |
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author | Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> | Mon Aug 31 19:37:00 2020 +0900 |
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | Fri Sep 04 17:27:10 2020 +0200 |
tree | e9081c7d9452a291f4076e501c189736410c949a | |
parent | 42f07816ac0cc797928119cc039c414ae2b95d34 [diff] |
video: fbdev: fix OOB read in vga_8planes_imageblit() syzbot is reporting OOB read at vga_8planes_imageblit() [1], for "cdat[y] >> 4" can become a negative value due to "const char *cdat". [1] https://syzkaller.appspot.com/bug?id=0d7a0da1557dcd1989e00cb3692b26d4173b4132 Reported-by: syzbot <syzbot+69fbd3e01470f169c8c4@syzkaller.appspotmail.com> Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: stable <stable@vger.kernel.org> Link: https://lore.kernel.org/r/90b55ec3-d5b0-3307-9f7c-7ff5c5fd6ad3@i-love.sakura.ne.jp Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>