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author | James Hogan <james.hogan@imgtec.com> | 2017-03-31 10:23:18 (GMT) |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-12 10:41:13 (GMT) |
commit | 49a292dcd86bd04794cfc50f87ff5aa4444df088 (patch) | |
tree | be5bbfdd1f8c78763ddf6c04fd5a3a29bad76e58 /drivers/watchdog/sch311x_wdt.c | |
parent | 2bb52b47e7f420bbed4192efca20a9de8ff4fa08 (diff) | |
download | linux-49a292dcd86bd04794cfc50f87ff5aa4444df088.tar.xz |
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/watchdog/sch311x_wdt.c')
0 files changed, 0 insertions, 0 deletions