From: Hugh Dickins <hugh@veritas.com>
To: Andrew Morton <akpm@osdl.org>
Cc: "Richard B. Johnson" <linux-os@analogic.com>,
stable@kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] fix remap_pte_range BUG
Date: Wed, 22 Jun 2005 14:02:41 +0100 (BST) [thread overview]
Message-ID: <Pine.LNX.4.61.0506221348540.13520@goblin.wat.veritas.com> (raw)
Out-of-tree user of remap_pfn_range hit kernel BUG at mm/memory.c:1112!
It passes an unrounded size to remap_pfn_range, which was okay before
2.6.12, but misses remap_pte_range's new end condition. An audit of
all the other ptwalks confirms that this is the only one so exposed.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
--- 2.6.12/mm/memory.c 2005-06-17 20:48:29.000000000 +0100
+++ linux/mm/memory.c 2005-06-21 20:31:42.000000000 +0100
@@ -1164,7 +1164,7 @@ int remap_pfn_range(struct vm_area_struc
{
pgd_t *pgd;
unsigned long next;
- unsigned long end = addr + size;
+ unsigned long end = addr + PAGE_ALIGN(size);
struct mm_struct *mm = vma->vm_mm;
int err;
next reply other threads:[~2005-06-22 13:01 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-22 13:02 Hugh Dickins [this message]
2005-06-22 15:52 ` [stable] " Chris Wright
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