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correct checks when reading wav chunk header

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This commit is contained in:
Eric Wasylishen 2012-01-05 00:45:09 -07:00
parent 131d4e8de7
commit 356fcebf84
1 changed files with 12 additions and 1 deletions
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13
Quake/snd_wave.c
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@ -68,13 +68,24 @@ static int WAV_ReadChunkInfo(const fshandle_t *fh, char *name)
name[4] = 0;
if (ftell(fh->file) >= (fh->start + fh->length))
{
return -1; /* End of WAV file */
}
r = fread(name, 1, 4, fh->file);
if (r != 4)
return -1;
len = FGetLittleLong(fh->file);
if (len < 0 || (ftell(fh->file) + len) > (fh->start + fh->length))
if (len < 0)
{
//Con_Printf("WAV: Negative chunk length\n");
return -1;
}
if ((ftell(fh->file) + len) > (fh->start + fh->length))
{
//Con_Printf("WAV: Chunk extends past end of file\n");
return -1;
}