[FFmpeg-cvslog] avcodec/jpeg2000htdec: Avoid freeing uninitialized pointers in ff_jpeg2000_decode_htj2k()

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Wed Aug  2 02:01:33 2023 +0200| [044ab532fcbbb457fce56c92b7ac99cfcc29a89a] | committer: Michael Niedermayer

avcodec/jpeg2000htdec: Avoid freeing uninitialized pointers in ff_jpeg2000_decode_htj2k()

Fixes: freeing of uninitialized pointers
Fixes: part of 58299

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Tomas Härdin <git at haerdin.se>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=044ab532fcbbb457fce56c92b7ac99cfcc29a89a
---

 libavcodec/jpeg2000htdec.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/jpeg2000htdec.c b/libavcodec/jpeg2000htdec.c
index 4c4e54710d..2b082b3b2f 100644
--- a/libavcodec/jpeg2000htdec.c
+++ b/libavcodec/jpeg2000htdec.c
@@ -1174,8 +1174,8 @@ ff_jpeg2000_decode_htj2k(const Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c
     int ret;
 
     /* Temporary buffers */
-    int32_t *sample_buf;
-    uint8_t *block_states;
+    int32_t *sample_buf = NULL;
+    uint8_t *block_states = NULL;
 
     int32_t n, val;             // Post-processing