From: Thierry Foucu <[email protected]>
Found with Address Sanitizer
---
libavcodec/vp6.c | 8 +++++---
1 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/libavcodec/vp6.c b/libavcodec/vp6.c
index 03024fa..b594003 100644
--- a/libavcodec/vp6.c
+++ b/libavcodec/vp6.c
@@ -442,7 +442,7 @@ static void vp6_parse_coeff(VP56Context *s)
model1 = model->coeff_dccv[pt];
model2 = model->coeff_dcct[pt][ctx];
- for (coeff_idx=0; coeff_idx<64; ) {
+ for (coeff_idx=0;;) {
if ((coeff_idx>1 && ct==0) || vp56_rac_get_prob(c, model2[0])) {
/* parse a coeff */
if (vp56_rac_get_prob(c, model2[2])) {
@@ -483,8 +483,10 @@ static void vp6_parse_coeff(VP56Context *s)
run += vp56_rac_get_prob(c, model3[i+8]) << i;
}
}
-
- cg = vp6_coeff_groups[coeff_idx+=run];
+ coeff_idx += run;
+ if (coeff_idx >= 64)
+ break;
+ cg = vp6_coeff_groups[coeff_idx];
model1 = model2 = model->coeff_ract[pt][ct][cg];
}
--
1.7.3.1
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