Commit 73dad6ef authored by Julien Thierry's avatar Julien Thierry Committed by Greg Kroah-Hartman

ARM: 8792/1: oabi-compat: copy oabi events using __copy_to_user()

Commit 31950890 upstream.

Copy events to user using __copy_to_user() rather than copy members of
individually with __put_user_error().
This has the benefit of disabling/enabling PAN once per event intead of
once per event member.
Signed-off-by: default avatarJulien Thierry <julien.thierry@arm.com>
Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: default avatarDavid A. Long <dave.long@linaro.org>
Reviewed-by: default avatarJulien Thierry <julien.thierry@arm.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 9cad5755
......@@ -277,6 +277,7 @@ asmlinkage long sys_oabi_epoll_wait(int epfd,
int maxevents, int timeout)
{
struct epoll_event *kbuf;
struct oabi_epoll_event e;
mm_segment_t fs;
long ret, err, i;
......@@ -295,8 +296,11 @@ asmlinkage long sys_oabi_epoll_wait(int epfd,
set_fs(fs);
err = 0;
for (i = 0; i < ret; i++) {
__put_user_error(kbuf[i].events, &events->events, err);
__put_user_error(kbuf[i].data, &events->data, err);
e.events = kbuf[i].events;
e.data = kbuf[i].data;
err = __copy_to_user(events, &e, sizeof(e));
if (err)
break;
events++;
}
kfree(kbuf);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment