We were hitting a weird bug with our cgroup stuff because shmem uses on stack
vmas. These aren't properly init'ed so we'd have garbage in vma->mm and bad
things would happen. Fix this by just init'ing to empty structs. Thanks,
Signed-off-by: Josef Bacik <jbacik@xxxxxx>
---
mm/shmem.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/shmem.c b/mm/shmem.c
index 902a148..ee6b834 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -911,7 +911,7 @@ static struct mempolicy *shmem_get_sbmpol(struct shmem_sb_info *sbinfo)
static struct page *shmem_swapin(swp_entry_t swap, gfp_t gfp,
struct shmem_inode_info *info, pgoff_t index)
{
- struct vm_area_struct pvma;
+ struct vm_area_struct pvma = {};
struct page *page;
/* Create a pseudo vma that just contains the policy */
@@ -932,7 +932,7 @@ static struct page *shmem_swapin(swp_entry_t swap, gfp_t gfp,
static struct page *shmem_alloc_page(gfp_t gfp,
struct shmem_inode_info *info, pgoff_t index)
{
- struct vm_area_struct pvma;
+ struct vm_area_struct pvma = {};
struct page *page;
/* Create a pseudo vma that just contains the policy */
--
1.8.3.1
--
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