usercopy fix for v4.18-rc8

Hi,

Please pull this usercopy fix for v4.18-rc8. Bart Massey discovered that the usercopy whitelist for JFS was incomplete: the inline inode data may intentionally "overflow" into the neighboring "extended area", so the size of the whitelist needed to be raised to include the neighboring field.

Thanks!

-Kees

The following changes since commit 7daf201d7fe8334e2d2364d4e8ed3394ec9af819:

Linux 4.18-rc2 (2018-06-24 20:54:29 +0800)

are available in the Git repository at:

https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git tags/usercopy-fix-v4.18-rc8

for you to fetch changes up to 961b33c244e5ba1543ae26270a1ba29f29c2db83:

jfs: Fix usercopy whitelist for inline inode data (2018-08-04 07:53:46 -0700)

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- Fix JFS usercopy whitelist (it needed to cover neighboring field too) for "overflow" inline inode data.

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Kees Cook (1):
jfs: Fix usercopy whitelist for inline inode data

 fs/jfs/jfs_dinode.h | 7 +++++++
 fs/jfs/jfs_incore.h | 1 +
 fs/jfs/super.c      | 3 +--
 3 files changed, 9 insertions(+), 2 deletions(-)

Kees Cook
Pixel Security