Prevent an out of array bound write.
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: [email protected]
---
libavcodec/jpeglsdec.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavcodec/jpeglsdec.c b/libavcodec/jpeglsdec.c
index 3616063..df72ca3 100644
--- a/libavcodec/jpeglsdec.c
+++ b/libavcodec/jpeglsdec.c
@@ -306,6 +306,10 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int
near,
av_dlog(s->avctx, "JPEG params: ILV=%i Pt=%i BPP=%i, scan = %i\n",
ilv, point_transform, s->bits, s->cur_scan);
if (ilv == 0) { /* separate planes */
+ if (s->cur_scan > s->nb_components) {
+ ret = AVERROR_INVALIDDATA;
+ goto end;
+ }
off = s->cur_scan - 1;
stride = (s->nb_components > 1) ? 3 : 1;
width = s->width * stride;
--
1.8.2.1
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