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[Xen-devel] [PATCH] e820: fix e820_change_range_type()
| To: | "keir.fraser" <keir.fraser@xxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH] e820: fix e820_change_range_type() |
| From: | Xiao Guangrong <ericxiao.gr@xxxxxxxxx> |
| Date: | Tue, 10 Nov 2009 03:19:44 +0800 |
| Cc: | Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Mon, 09 Nov 2009 11:20:21 -0800 |
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In below case, e820_change_range_type() will return succee:
[s, e] is in the middle of [rs, re] and e820->nr_map+1 >= ARRAY_SIZE(e820->map)
actually, it's failed, so this patch fix it
Signed-off-by: Xiao Guangrong <ericxiao.gr@xxxxxxxxx>
diff -r f23b859e237a -r 93bc06dd1161 xen/arch/x86/e820.c
--- a/xen/arch/x86/e820.c Tue Nov 10 02:34:16 2009 +0800
+++ b/xen/arch/x86/e820.c Tue Nov 10 02:41:59 2009 +0800
@@ -574,7 +574,7 @@
e820->map[i+1].type = new_type;
}
}
- else if ( e820->nr_map+1 < ARRAY_SIZE(e820->map) )
+ else
{
if ( (e820->nr_map + 2) > ARRAY_SIZE(e820->map) )
goto overflow;
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