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ffv1: fix out-of-bounds read
author
Vittorio Giovara
<vittorio.giovara@gmail.com>
Tue, 11 Nov 2014 16:40:04 +0000
(17:40 +0100)
committer
Luca Barbato
<lu_zero@gentoo.org>
Mon, 12 Jan 2015 23:16:41 +0000
(
00:16
+0100)
CC: libav-stable@libav.org
Bug-Id: CID 1047234
(cherry picked from commit
6abe7edabb7d57e82d7ea6312d30cf05d2192c5b
)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
libavcodec/ffv1enc.c
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diff --git
a/libavcodec/ffv1enc.c
b/libavcodec/ffv1enc.c
index
179453d
..
93630b4
100644
(file)
--- a/
libavcodec/ffv1enc.c
+++ b/
libavcodec/ffv1enc.c
@@
-71,7
+71,7
@@
static void find_best_state(uint8_t best_state[256][256],
best_len[k] = len;
best_state[i][k] = j;
}
- for (m =
0
; m < 256; m++)
+ for (m =
1
; m < 256; m++)
if (occ[m]) {
newocc[one_state[m]] += occ[m] * p;
newocc[256 - one_state[256 - m]] += occ[m] * (1 - p);