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fix crash with empty blob metadata

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a blob metadata item with length 0 triggered a segv
This commit is contained in:
John Cupitt 2016-09-04 05:39:44 +01:00
parent 0c2d7c955a
commit dac05244f8
1 changed files with 3 additions and 2 deletions
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5
libvips/iofuncs/base64.c
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@ -228,9 +228,10 @@ vips__b64_decode( const char *buffer, size_t *data_length )
{ {
const size_t buffer_length = strlen( buffer ); const size_t buffer_length = strlen( buffer );
/* Worst case. /* Worst case. Add one, since we don't want to return NULL for an empty
* input string, it would look like an error return.
*/ */
const size_t output_data_length = buffer_length * 3 / 4; const size_t output_data_length = 1 + buffer_length * 3 / 4;
unsigned char *data; unsigned char *data;
unsigned char *p; unsigned char *p;