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avcodec/ass_split: Don't presume strlen to be >= 2

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Fixes potential heap-buffer-overflow.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-12-01 14:24:10 +01:00 committed by Andreas Rheinhardt
parent 0062aca592
commit f38f791a23
1 changed files with 1 additions and 1 deletions
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libavcodec/ass_split.c
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@ -376,7 +376,7 @@ ASSSplitContext *ff_ass_split(const char *buf)
ASSSplitContext *ctx = av_mallocz(sizeof(*ctx)); ASSSplitContext *ctx = av_mallocz(sizeof(*ctx));
if (!ctx) if (!ctx)
return NULL; return NULL;
if (buf && !memcmp(buf, "\xef\xbb\xbf", 3)) // Skip UTF-8 BOM header if (buf && !strncmp(buf, "\xef\xbb\xbf", 3)) // Skip UTF-8 BOM header
buf += 3; buf += 3;
ctx->current_section = -1; ctx->current_section = -1;
if (ass_split(ctx, buf) < 0) { if (ass_split(ctx, buf) < 0) {