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lavf/rtmpproto: fix the playpath truncation if the len > 512 

fix the playpath truncation if the len > 512

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Found-by: liuwenhuang <liuwenhuang@tencent.com>
Signed-off-by: Jun Zhao <barryjzhao@tencent.com>
This commit is contained in:
Jun Zhao 2019-11-15 19:10:47 +08:00
parent 4fb6ce27f0
commit 487e7e9670
1 changed files with 5 additions and 3 deletions
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8
libavformat/rtmpproto.c
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@ -48,7 +48,6 @@
#endif
#define APP_MAX_LENGTH 1024
#define PLAYPATH_MAX_LENGTH 512
#define TCURL_MAX_LENGTH 1024
#define FLASHVER_MAX_LENGTH 64
#define RTMP_PKTDATA_DEFAULT_SIZE 4096
@ -2746,7 +2745,10 @@ reconnect:
}
if (!rt->playpath) {
rt->playpath = av_malloc(PLAYPATH_MAX_LENGTH);
int max_len = 1;
if (fname)
max_len = strlen(fname) + 5; // add prefix "mp4:"
rt->playpath = av_malloc(max_len);
if (!rt->playpath) {
ret = AVERROR(ENOMEM);
goto fail;
@ -2763,7 +2765,7 @@ reconnect:
fname[len - 4] = '\0';
rt->playpath[0] = 0;
}
av_strlcat(rt->playpath, fname, PLAYPATH_MAX_LENGTH);
av_strlcat(rt->playpath, fname, max_len);
} else {
rt->playpath[0] = '\0';
}