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From: Cyrill Gorcunov <gorcunov@openvz.org>
Date: Thu, 23 Apr 2009 09:47:54 +0000 (+0400)
Subject: mm: check for no mmaps in exit_mmap()
X-Git-Url: http://git.openvz.org/?p=linux-2.6.27-openvz;a=commitdiff_plain;h=acfd6c89981b9de80b96741380780ffe6c87a15d
mm: check for no mmaps in exit_mmap()
Backported commit dcd4a049 from the mainstream.
http://bugzilla.openvz.org/show_bug.cgi?id=1230
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
---
diff --git a/mm/mmap.c b/mm/mmap.c
index 564186a..2679a9c 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2133,6 +2133,9 @@ void exit_mmap(struct mm_struct *mm)
arch_exit_mmap(mm);
mmu_notifier_release(mm);
+ if (!vma) /* Can happen if dup_mmap() received an OOM */
+ return;
+
lru_add_drain();
flush_cache_mm(mm);
tlb = tlb_gather_mmu(mm, 1);
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