From: Al Viro <viro@ZenIV.linux.org.uk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH 2/3] VM_GROWS{UP,DOWN} shouldn't be set on shmem VMAs
Date: Mon, 5 Mar 2012 06:39:47 +0000 [thread overview]
Message-ID: <20120305063947.GJ23916@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20120305063707.GH23916@ZenIV.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
mm/mmap.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index 3f758c7..22e1a0b 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1293,6 +1293,8 @@ munmap_back:
pgoff = vma->vm_pgoff;
vm_flags = vma->vm_flags;
} else if (vm_flags & VM_SHARED) {
+ if (unlikely(vm_flags & (VM_GROWSDOWN|VM_GROWSUP)))
+ goto free_vma;
error = shmem_zero_setup(vma);
if (error)
goto free_vma;
--
1.7.2.5
next prev parent reply other threads:[~2012-03-05 6:39 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-05 6:37 [patches] VM-related fixes Al Viro
2012-03-05 6:38 ` [PATCH 1/3] aout: move setup_arg_pages() prior to reading/mapping the binary Al Viro
2012-03-05 6:39 ` Al Viro [this message]
2012-03-05 6:40 ` [PATCH 3/3] flush_tlb_range() needs ->page_table_lock when ->mmap_sem is not held Al Viro
2012-03-05 20:30 ` Linus Torvalds
2012-03-05 20:53 ` Al Viro
2012-03-09 21:06 ` Benjamin Herrenschmidt
2012-03-06 3:38 ` [patches] VM-related fixes Arve Hjønnevåg
2012-03-06 4:10 ` Al Viro
2012-03-06 5:25 ` Arve Hjønnevåg
2012-03-06 5:57 ` Al Viro
2012-03-06 6:36 ` Arve Hjønnevåg
2012-03-08 23:43 ` [PATCH] Staging: android: binder: Fix use-after-free bug Arve Hjønnevåg
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