From: Rusty Russell <rusty@rustcorp.com.au>
Date: Mon, 4 Jan 2010 08:56:14 +0000 (+1030)
Subject: lguest: fix bug in setting guest GDT entry
X-Git-Tag: v2.6.33-rc3~8
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3e27249c84beed1c79d767b350e52ad038db9053;p=platform%2Fkernel%2Flinux-3.10.git

lguest: fix bug in setting guest GDT entry

We kill the guest, but then we blatt random stuff.

Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/drivers/lguest/segments.c b/drivers/lguest/segments.c
index 951c57b..ede4658 100644
--- a/drivers/lguest/segments.c
+++ b/drivers/lguest/segments.c
@@ -179,8 +179,10 @@ void load_guest_gdt_entry(struct lg_cpu *cpu, u32 num, u32 lo, u32 hi)
 	 * We assume the Guest has the same number of GDT entries as the
 	 * Host, otherwise we'd have to dynamically allocate the Guest GDT.
 	 */
-	if (num >= ARRAY_SIZE(cpu->arch.gdt))
+	if (num >= ARRAY_SIZE(cpu->arch.gdt)) {
 		kill_guest(cpu, "too many gdt entries %i", num);
+		return;
+	}
 
 	/* Set it up, then fix it. */
 	cpu->arch.gdt[num].a = lo;