Refuse a call of xenevtchn_open() with unsupported bits in flags being set.
Suggested-by: Andrew Cooper <andrew.coop...@citrix.com> Signed-off-by: Juergen Gross <jgr...@suse.com> --- V11: - new patch (Andrew Cooper) --- tools/libs/evtchn/core.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/tools/libs/evtchn/core.c b/tools/libs/evtchn/core.c index 50bae8ec0d..581a14e3df 100644 --- a/tools/libs/evtchn/core.c +++ b/tools/libs/evtchn/core.c @@ -13,6 +13,7 @@ * License along with this library; If not, see <http://www.gnu.org/licenses/>. */ +#include <errno.h> #include <unistd.h> #include <stdlib.h> @@ -31,9 +32,16 @@ static int all_restrict_cb(Xentoolcore__Active_Handle *ah, domid_t domid) xenevtchn_handle *xenevtchn_open(xentoollog_logger *logger, unsigned int flags) { - xenevtchn_handle *xce = malloc(sizeof(*xce)); + xenevtchn_handle *xce; int rc; + if ( flags ) + { + errno = EINVAL; + return NULL; + } + + xce = malloc(sizeof(*xce)); if ( !xce ) return NULL; -- 2.26.2
