diff mbox

[FFmpeg-devel,2/2] avcodec/ffv1dec: Fix integer overflow in read_quant_table()

Message ID 20170918230453.19774-2-michael@niedermayer.cc
State Accepted
Commit d00fc952b6c261dd8eb0f7552b9ccf985dbc2b20
Headers show

Commit Message

Michael Niedermayer Sept. 18, 2017, 11:04 p.m. UTC 
Fixes: runtime error: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int'
Fixes: 3361/clusterfuzz-testcase-minimized-5065842955911168

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavcodec/ffv1dec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox

Patch

diff --git a/libavcodec/ffv1dec.c b/libavcodec/ffv1dec.c
index b13ecd3eab..d2bfee784f 100644
--- a/libavcodec/ffv1dec.c
+++ b/libavcodec/ffv1dec.c
@@ -372,7 +372,7 @@  static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)
     memset(state, 128, sizeof(state));
 
     for (v = 0; i < 128; v++) {
-        unsigned len = get_symbol(c, state, 0) + 1;
+        unsigned len = get_symbol(c, state, 0) + 1U;
 
         if (len > 128 - i || !len)
             return AVERROR_INVALIDDATA;