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(parent: b24d0d5) | patch
/dev/mem: Avoid overwriting "err" in read_mem()
authorKees Cook <keescook@chromium.org>
Tue, 27 Mar 2018 21:06:14 +0000 (14:06 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 28 Mar 2018 11:23:54 +0000 (13:23 +0200)
commitb5b38200ebe54879a7264cb6f33821f61c586a7e
tree80880ee96abcb2a7ce8edbdca6de36d224998157tree
parentb24d0d5b12a678b96676348976982686fbe222b4commit | diff
/dev/mem: Avoid overwriting "err" in read_mem()

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>
drivers/char/mem.c diff | blob | history
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