hyperv/vmbus: Make sure that the sub-channel count is valid.

MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D7865
svn path=/head/; revision=305789
2016-09-14 06:30:14 +00:00 · 2016-09-14 06:30:14 +00:00 · 67e44048f0 · 2020-12-20 02:59:44 +00:00
commit 67e44048f0
parent 098ab4a242
1 changed files with 2 additions and 0 deletions
--- a/sys/dev/hyperv/vmbus/vmbus_chan.c
+++ b/sys/dev/hyperv/vmbus/vmbus_chan.c
@ -1346,6 +1346,8 @@ vmbus_subchan_get(struct vmbus_channel *pri_chan, int subchan_cnt)
 	struct vmbus_channel **ret, *chan;
 	int i;

+	KASSERT(subchan_cnt > 0, ("invalid sub-channel count %d", subchan_cnt));
+
 	ret = malloc(subchan_cnt * sizeof(struct vmbus_channel *), M_TEMP,
 	    M_WAITOK);