[Trusty][CVE-2014-7822][Patch 0/1] splice: Apply generic position and size checks to each write

[Luis Henriques]

Following this email I am sending a patch that fixes CVE-2014-7822 for
Trusty.  It was cherry-picked from the stable linux-3.13.y-queue
branch.

The original upstream fix in Linus' tree is:

commit 8d0207652cbe27d1f962050737848e5ad4671958
Author: Al Viro <viro at zeniv.linux.org.uk>
Date:   Sat Apr 5 04:27:08 2014 -0400

    ->splice_write() via ->write_iter()

However, this fix can not be applied to older kernels.

The fix for the 3.13 was based on Ben Hutchings's fix for the stable
3.2 kernel here:

 https://lkml.org/lkml/2015/2/16/643

We (Kamal and me) have reviewed this patch and couldn't find out any
other splice_write implementations in the 3.13 kernel that were not
calling generic_file_splice_write.  But we could be wrong :-)

Ben Hutchings (1):
  splice: Apply generic position and size checks to each write

 fs/ocfs2/file.c | 8 ++++++--
 fs/splice.c     | 8 ++++++--
 2 files changed, 12 insertions(+), 4 deletions(-)