mm/vmscan.c: fix mapping use after free
We need lock_page_nosync() here because we have no reference to the mapping when taking the page lock. Signed-off-by: Nick Piggin <npiggin@suse.de> Reviewed-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
c61284e991
commit
a6aa62a090
|
@ -298,7 +298,7 @@ static int may_write_to_queue(struct backing_dev_info *bdi)
|
||||||
static void handle_write_error(struct address_space *mapping,
|
static void handle_write_error(struct address_space *mapping,
|
||||||
struct page *page, int error)
|
struct page *page, int error)
|
||||||
{
|
{
|
||||||
lock_page(page);
|
lock_page_nosync(page);
|
||||||
if (page_mapping(page) == mapping)
|
if (page_mapping(page) == mapping)
|
||||||
mapping_set_error(mapping, error);
|
mapping_set_error(mapping, error);
|
||||||
unlock_page(page);
|
unlock_page(page);
|
||||||
|
|
Loading…
Reference in a new issue