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avcodec/iff: decode_delta_j: Check that the number of bytes that will be read are available

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This should avoid long loops
related to CID1361958

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-07-06 10:43:46 +02:00
parent 3f5b7a2d73
commit fcdbbbd85a
1 changed files with 2 additions and 2 deletions
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4
libavcodec/iff.c
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@ -865,7 +865,7 @@ static void decode_delta_j(uint8_t *dst,
for (g = 0; g < groups; g++) {
offset = bytestream2_get_be16(&gb);
if (bytestream2_get_bytes_left(&gb) < 1)
if (cols * bpp == 0 || bytestream2_get_bytes_left(&gb) < cols * bpp)
return;
if (kludge_j)
@ -911,7 +911,7 @@ static void decode_delta_j(uint8_t *dst,
for (d = 0; d < bpp; d++) {
unsigned noffset = offset + (r * pitch) + d * planepitch;
if (bytestream2_get_bytes_left(&gb) < 1)
if (!bytes || bytestream2_get_bytes_left(&gb) < bytes)
return;
for (b = 0; b < bytes; b++) {