| commit | 5f834dd24baec1f9926e8a06609e0906fd607b06 | [log] [tgz] |
|---|---|---|
| author | Kees Cook <keescook@chromium.org> | Tue Mar 27 14:06:14 2018 -0700 |
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | Sun Apr 08 14:26:31 2018 +0200 |
| tree | e64f64f6251c420150d82cc6387ab68c6b6e6b24 | |
| parent | 66a65ca5b8fda6f5c55a9cf83e0fcb8e613baaa9 [diff] |
/dev/mem: Avoid overwriting "err" in read_mem()
commit b5b38200ebe54879a7264cb6f33821f61c586a7e upstream.
Successes in probe_kernel_read() would mask failures in copy_to_user()
during read_mem().
Reported-by: Brad Spengler <spender@grsecurity.net>
Fixes: 22ec1a2aea73 ("/dev/mem: Add bounce buffer for copy-out")
Cc: stable@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>