The patch titled
Prevent NULL pointer deref in grab_swap_token
has been removed from the -mm tree. Its filename was
prevent-null-pointer-deref-in-grab_swap_token.patch
This patch was dropped because it is obsolete
------------------------------------------------------
Subject: Prevent NULL pointer deref in grab_swap_token
From: Dean Roe <roe@xxxxxxx>
grab_swap_token() assumes that the current process has an mm struct, which
is not true for kernel threads invoking get_user_pages(). Since this
should be extremely rare, just return from grab_swap_token() without doing
anything.
Signed-off-by: Dean Roe <roe@xxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
mm/thrash.c | 3 +++
1 files changed, 3 insertions(+)
diff -puN mm/thrash.c~prevent-null-pointer-deref-in-grab_swap_token mm/thrash.c
--- devel/mm/thrash.c~prevent-null-pointer-deref-in-grab_swap_token 2006-03-07 13:22:53.000000000 -0800
+++ devel-akpm/mm/thrash.c 2006-03-07 13:22:53.000000000 -0800
@@ -54,6 +54,9 @@ void grab_swap_token(void)
struct mm_struct *mm;
int reason;
+ if (current->mm == NULL)
+ return;
+
/* We have the token. Let others know we still need it. */
if (has_swap_token(current->mm)) {
current->mm->recent_pagein = 1;
_
Patches currently in -mm which might be from roe@xxxxxxx are
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