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https://gitdl.cn/https://github.com/chakralinux/core.git
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36 lines
1.1 KiB
Diff
36 lines
1.1 KiB
Diff
--- libwmf-0.2.8.4/src/player.c
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+++ libwmf-0.2.8.4/src/player.c
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@@ -133,7 +133,31 @@
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}
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/* P->Parameters = (unsigned char*) wmf_malloc (API,(MAX_REC_SIZE(API)-3) * 2 * sizeof (unsigned char));
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- */ P->Parameters = (unsigned char*) wmf_malloc (API,(MAX_REC_SIZE(API) ) * 2 * sizeof (unsigned char));
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+*/
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+ U32 nMaxRecordSize = (MAX_REC_SIZE(API) ) * 2 * sizeof (unsigned char);
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+ if (nMaxRecordSize)
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+ {
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+ //before allocating memory do a sanity check on size by seeking
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+ //to claimed end to see if its possible. We're constrained here
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+ //by the api and existing implementations to not simply seeking
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+ //to SEEK_END. So use what we have to skip to the last byte and
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+ //try and read it.
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+ const long nPos = WMF_TELL (API);
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+ WMF_SEEK (API, nPos + nMaxRecordSize - 1);
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+ if (ERR (API))
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+ { WMF_DEBUG (API,"bailing...");
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+ return (API->err);
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+ }
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+ int byte = WMF_READ (API);
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+ if (byte == (-1))
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+ { WMF_ERROR (API,"Unexpected EOF!");
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+ API->err = wmf_E_EOF;
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+ return (API->err);
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+ }
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+ WMF_SEEK (API, nPos);
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+ }
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+
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+ P->Parameters = (unsigned char*) wmf_malloc (API, nMaxRecordSize);
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if (ERR (API))
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{ WMF_DEBUG (API,"bailing...");
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