tree 4dfc7c1c8a6119648978f25c1065b344123638cb
parent 8cd133073f9b5cd335c0b2e4740aceb025d50ca9
author Ingo Molnar <mingo@elte.hu> 1171270482 -0800
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1171302520 -0800

[PATCH] kvm: fix vcpu freeing bug

vcpu_load() can return NULL and it sometimes does in failure paths (for
example when the userspace ABI version is too old) - causing a preemption
count underflow in the ->vcpu_free() later on.  So check for NULL.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>