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avio: Check for invalid buffer length.

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(cherry picked from commit ab2940691b)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Alex Converse 2011-10-14 18:27:59 -07:00 committed by Michael Niedermayer
parent 15a7fe106c
commit e86e9f8b7a
1 changed files with 5 additions and 2 deletions
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7
libavformat/aviobuf.c
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@ -778,13 +778,14 @@ int avio_get_str(AVIOContext *s, int maxlen, char *buf, int buflen)
{
int i;
if (buflen <= 0)
return AVERROR(EINVAL);
// reserve 1 byte for terminating 0
buflen = FFMIN(buflen - 1, maxlen);
for (i = 0; i < buflen; i++)
if (!(buf[i] = avio_r8(s)))
return i + 1;
if (buflen)
buf[i] = 0;
buf[i] = 0;
for (; i < maxlen; i++)
if (!avio_r8(s))
return i + 1;
@ -796,6 +797,8 @@ int avio_get_str(AVIOContext *s, int maxlen, char *buf, int buflen)
{\
char* q = buf;\
int ret = 0;\
if (buflen <= 0) \
return AVERROR(EINVAL); \
while (ret + 1 < maxlen) {\
uint8_t tmp;\
uint32_t ch;\