@@ -1143,6 +1143,9 @@ static void decode_long_vertical_delta(uint8_t *dst,
x = bytestream2_get_be32(&dgb);
}
+ if (ofsdst + (opcode - 1LL) * dstpitch > bytestream2_size_p(&pb))
+ return;
+
while (opcode) {
bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
if (h && (j == (ncolumns - 1))) {
@@ -1283,6 +1286,9 @@ static void decode_long_vertical_delta2(uint8_t *dst,
x = bytestream2_get_be32(&gb);
}
+ if (ofsdst + (opcode - 1LL) * dstpitch > bytestream2_size_p(&pb))
+ return;
+
while (opcode && bytestream2_get_bytes_left_p(&pb) > 1) {
bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
if (h && (j == ncolumns - 1))
Fixes: Timeout (31sec -> 41ms) Fixes: 18380/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_IFF_ILBM_fuzzer-5645210121404416 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavcodec/iff.c | 6 ++++++ 1 file changed, 6 insertions(+)