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| author | Andrea Arcangeli <aarcange@redhat.com> | 2017-02-23 02:43:55 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-23 03:41:29 +0300 |
| commit | cb658a453b9327ce96ce5222c24d162b5b65b564 (patch) | |
| tree | dc5078cdec1b41f2ff11e0ee693564a9a47e806e /include/uapi/linux/userfaultfd.h | |
| parent | a425d3584e7e69587aa441e91c7ffce7f47004d7 (diff) | |
| download | linux-cb658a453b9327ce96ce5222c24d162b5b65b564.tar.xz | |
userfaultfd: shmem: avoid leaking blocks and used blocks in UFFDIO_COPY
If the atomic copy_user fails because of a real dangling userland
pointer, we won't go back into the shmem method, so when the method
returns it must not leave anything charged up, except the page itself.
Link: http://lkml.kernel.org/r/20161216144821.5183-37-aarcange@redhat.com
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Michael Rapoport <RAPOPORT@il.ibm.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/uapi/linux/userfaultfd.h')
0 files changed, 0 insertions, 0 deletions