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[FFmpeg-devel,05/23] avcodec/zmbvenc: Fix memleak upon init error

Message ID VI1PR0301MB2159E1D9076EAF869B03F7B18F589@VI1PR0301MB2159.eurprd03.prod.outlook.com
State Accepted
Commit 141f3053ba0fdb40971cf0700d0115631fca9949
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Series [FFmpeg-devel,01/23] avcodec/ljpegenc: Mark encoder as init-threadsafe
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Commit Message

Andreas Rheinhardt May 6, 2021, 5:11 a.m. UTC
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavcodec/zmbvenc.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/libavcodec/zmbvenc.c b/libavcodec/zmbvenc.c
index 531559e264..d0c353d0df 100644
--- a/libavcodec/zmbvenc.c
+++ b/libavcodec/zmbvenc.c
@@ -74,6 +74,7 @@  typedef struct ZmbvEncContext {
     int keyint, curfrm;
     int bypp;
     enum ZmbvFormat fmt;
+    int zlib_init_ok;
     z_stream zstream;
 
     int score_tab[ZMBV_BLOCK * ZMBV_BLOCK * 4 + 1];
@@ -305,8 +306,9 @@  static av_cold int encode_end(AVCodecContext *avctx)
     av_freep(&c->comp_buf);
     av_freep(&c->work_buf);
 
-    deflateEnd(&c->zstream);
     av_freep(&c->prev_buf);
+    if (c->zlib_init_ok)
+        deflateEnd(&c->zstream);
 
     return 0;
 }
@@ -376,8 +378,6 @@  static av_cold int encode_init(AVCodecContext *avctx)
         return AVERROR(EINVAL);
     }
 
-    // Needed if zlib unused or init aborted before deflateInit
-    memset(&c->zstream, 0, sizeof(z_stream));
     c->comp_size = avctx->width * c->bypp * avctx->height + 1024 +
         ((avctx->width + ZMBV_BLOCK - 1) / ZMBV_BLOCK) * ((avctx->height + ZMBV_BLOCK - 1) / ZMBV_BLOCK) * 2 + 4;
     if (!(c->work_buf = av_malloc(c->comp_size))) {
@@ -419,6 +419,7 @@  static av_cold int encode_init(AVCodecContext *avctx)
         av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
         return -1;
     }
+    c->zlib_init_ok = 1;
 
     return 0;
 }
@@ -441,4 +442,5 @@  const AVCodec ff_zmbv_encoder = {
 #endif //ZMBV_ENABLE_24BPP
                                                      AV_PIX_FMT_BGR0,
                                                      AV_PIX_FMT_NONE },
+    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
 };