On 01/13/2014 03:32 PM, Dave Hansen wrote:
On 01/13/2014 10:46 AM, Josef Bacik wrote:
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,
...
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 = {};
What does that code do if it needs an mm and doesn't find one?
We have checks for if (vma->mm && some other shit) so we expect NULLs
for stuff we don't care about. Thanks,
Josef
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