The currrent code in libcacard/vcard_emul_nss.c:vcard_emul_options()
has a weird bug in variable usage around expanding opts->vreader
array.
There's a helper variable, vreaderOpt, which is first needlessly
initialized to NULL, next, conditionally, only we have to expand
opts->vreader, receives array expansion from g_renew(), and next,
even if we don't actually perform expansion, the value of this
variable is assigned to the actual array, opts->vreader, which
was supposed to be expanded.
So, since we expand the array by READER_STEP increments, only
once in READER_STEP (=4) the code will work, in other 3/4 times
it will fail badly.
Fix this by not using this temp variable when expanding the
array, and by dropping the useless =NULL initializer too -
if it wasn't in place initially, compiler would have warned
us about this problem at the beginning.
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
char type_str[100];
VCardEmulType type;
int count, i;
- VirtualReaderOptions *vreaderOpt = NULL;
+ VirtualReaderOptions *vreaderOpt;
args = strip(args + 5);
if (*args != '(') {
if (opts->vreader_count >= reader_count) {
reader_count += READER_STEP;
- vreaderOpt = g_renew(VirtualReaderOptions, opts->vreader,
- reader_count);
+ opts->vreader = g_renew(VirtualReaderOptions, opts->vreader,
+ reader_count);
}
- opts->vreader = vreaderOpt;
- vreaderOpt = &vreaderOpt[opts->vreader_count];
+ vreaderOpt = &opts->vreader[opts->vreader_count];
vreaderOpt->name = g_strndup(name, name_length);
vreaderOpt->vname = g_strndup(vname, vname_length);
vreaderOpt->card_type = type;