[patch 23/62] proc: fix /proc/*/pagemap

[Greg KH]

2.6.26 -stable review patch.  If anyone has any objections, please let
us know.

------------------
From: Alexey Dobriyan <adobriyan@xxxxxxxxx>

commit ee1e6ab6056a8b9c19377257002da98b83819531 upstream

struct pagemap_walk was placed on stack, some hooks are initialized, the
rest (->pgd_entry, ->pud_entry, ->pte_entry) are valid but junk.

Reported-by: Eric Sesterhenn <snakebyte@xxxxxx>
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Cc: "Vegard Nossum" <vegard.nossum@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 fs/proc/task_mmu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -636,7 +636,7 @@ static ssize_t pagemap_read(struct file 
 	struct pagemapread pm;
 	int pagecount;
 	int ret = -ESRCH;
-	struct mm_walk pagemap_walk;
+	struct mm_walk pagemap_walk = {};
 	unsigned long src;
 	unsigned long svpfn;
 	unsigned long start_vaddr;

-- 
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