diff options
| author | James Hogan <james.hogan@imgtec.com> | 2017-03-31 11:23:18 +0100 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2017-06-17 15:55:03 +0200 |
| commit | 244522cd164c6205f1b068dfe64a6c6d2e06a8b8 (patch) | |
| tree | d99b6a3e442ac21675b14d1f042c8b163f83c05d /include/asm-generic/exec.h | |
| parent | cdbd601879b8e689a0d90a160cfacf50e52fa709 (diff) | |
metag/usercopy: Fix alignment error checking
commit 2257211942bbbf6c798ab70b487d7e62f7835a1a upstream.
Fix the error checking of the alignment adjustment code in
raw_copy_from_user(), which mistakenly considers it safe to skip the
error check when aligning the source buffer on a 2 or 4 byte boundary.
If the destination buffer was unaligned it may have started to copy
using byte or word accesses, which could well be at the start of a new
(valid) source page. This would result in it appearing to have copied 1
or 2 bytes at the end of the first (invalid) page rather than none at
all.
Fixes: 373cd784d0fc ("metag: Memory handling")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-metag@vger.kernel.org
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'include/asm-generic/exec.h')
0 files changed, 0 insertions, 0 deletions