A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-31 04:01:48 -04:00
Code Issues Projects Releases Packages Wiki Activity

userfaultfd: shmem: lock the page before adding it to pagecache

Browse source 
A VM_BUG_ON triggered on the shmem selftest.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Andrea Arcangeli <[email protected]>
Cc: "Dr. David Alan Gilbert" <[email protected]>
Cc: Hillf Danton <[email protected]>
Cc: Michael Rapoport <[email protected]>
Cc: Mike Kravetz <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Pavel Emelyanov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Andrea Arcangeli 2017-02-22 15:43:49 -08:00 • committed by Linus Torvalds
commit 9cc90c664a
1 changed files with 5 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

5
mm/shmem.c
View file

@ -2245,6 +2245,10 @@ int shmem_mcopy_atomic_pte(struct mm_struct *dst_mm,
*pagep = NULL;
}
VM_BUG_ON(PageLocked(page) || PageSwapBacked(page));
__SetPageLocked(page);
__SetPageSwapBacked(page);
ret = mem_cgroup_try_charge(page, dst_mm, gfp, &memcg, false);
if (ret)
goto out_release;
@ -2294,6 +2298,7 @@ out_release_uncharge_unlock:
out_release_uncharge:
mem_cgroup_cancel_charge(page, memcg, false);
out_release:
unlock_page(page);
put_page(page);
out_dec_used_blocks:
if (sbinfo->max_blocks)