Module Name: src
Committed By: rin
Date: Sun Jul 30 07:48:54 UTC 2023
Modified Files:
src/sys/compat/netbsd32: netbsd32_epoll.c
Log Message:
netbsd32_epoll_pwait2: Early return if no event arrived;
Do not attempt to allocate 0-byte buffer by kmem_alloc(9).
To generate a diff of this commit:
cvs rdiff -u -r1.1 -r1.2 src/sys/compat/netbsd32/netbsd32_epoll.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/compat/netbsd32/netbsd32_epoll.c
diff -u src/sys/compat/netbsd32/netbsd32_epoll.c:1.1 src/sys/compat/netbsd32/netbsd32_epoll.c:1.2
--- src/sys/compat/netbsd32/netbsd32_epoll.c:1.1 Sun Jul 30 06:52:20 2023
+++ src/sys/compat/netbsd32/netbsd32_epoll.c Sun Jul 30 07:48:54 2023
@@ -1,4 +1,4 @@
-/* $NetBSD: netbsd32_epoll.c,v 1.1 2023/07/30 06:52:20 rin Exp $ */
+/* $NetBSD: netbsd32_epoll.c,v 1.2 2023/07/30 07:48:54 rin Exp $ */
/*-
* SPDX-License-Identifier: BSD-2-Clause
@@ -28,7 +28,7 @@
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: netbsd32_epoll.c,v 1.1 2023/07/30 06:52:20 rin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: netbsd32_epoll.c,v 1.2 2023/07/30 07:48:54 rin Exp $");
#include <sys/types.h>
#include <sys/epoll.h>
@@ -129,7 +129,7 @@ netbsd32_epoll_pwait2(struct lwp *l,
error = epoll_wait_common(l, retval, SCARG(uap, epfd), events,
maxevents, tsp, ssp);
- if (error != 0) {
+ if (error != 0 || *retval == 0) {
kmem_free(events, maxevents * sizeof(*events));
return error;
}
