[FFmpeg-cvslog] avcodec/bmp_parser: Ensure remaining_size is not too small in startcode packet crossing corner case

[Michael Niedermayer]

ffmpeg | branch: release/2.7 | Michael Niedermayer <michael at niedermayer.cc> | Thu Apr 14 15:10:31 2016 +0200| [62e87d065b9bae0f9d5319a88c8af0a0c3bdd084] | committer: Michael Niedermayer

avcodec/bmp_parser: Ensure remaining_size is not too small in startcode packet crossing corner case

Fixes Ticket 5438

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 8e26bdd59bf559d00c7e60c53fff292de10139ff)

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=62e87d065b9bae0f9d5319a88c8af0a0c3bdd084
---

 libavcodec/bmp_parser.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/bmp_parser.c b/libavcodec/bmp_parser.c
index c9493dc..7ab32a0 100644
--- a/libavcodec/bmp_parser.c
+++ b/libavcodec/bmp_parser.c
@@ -63,7 +63,7 @@ restart:
                     continue;
                 }
                 bpc->pc.frame_start_found++;
-                bpc->remaining_size = bpc->fsize + i - 17;
+                bpc->remaining_size = bpc->fsize + FFMAX(i - 17, 0);
 
                 if (bpc->pc.index + i > 17) {
                     next = i - 17;