The patch titled
epoll: remember the event if epoll_wait returns -EFAULT
has been removed from the -mm tree. Its filename was
epoll-remember-the-event-if-epoll_wait-returns-efault.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: epoll: remember the event if epoll_wait returns -EFAULT
From: Tony Battersby <tonyb@xxxxxxxxxxxxxxx>
If epoll_wait returns -EFAULT, the event that was being returned when the
fault was encountered will be forgotten. This is not a big deal since
EFAULT will happen only if a buggy userspace program passes in a bad
address, in which case what happens later usually doesn't matter.
However, it is easy to remember the event for later, and this patch makes
a simple change to do that.
Signed-off-by: Tony Battersby <tonyb@xxxxxxxxxxxxxxx>
Acked-by: Davide Libenzi <davidel@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/eventpoll.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff -puN fs/eventpoll.c~epoll-remember-the-event-if-epoll_wait-returns-efault fs/eventpoll.c
--- a/fs/eventpoll.c~epoll-remember-the-event-if-epoll_wait-returns-efault
+++ a/fs/eventpoll.c
@@ -1054,8 +1054,10 @@ static int ep_send_events_proc(struct ev
*/
if (revents) {
if (__put_user(revents, &uevent->events) ||
- __put_user(epi->event.data, &uevent->data))
+ __put_user(epi->event.data, &uevent->data)) {
+ list_add(&epi->rdllink, head);
return eventcnt ? eventcnt : -EFAULT;
+ }
eventcnt++;
uevent++;
if (epi->event.events & EPOLLONESHOT)
_
Patches currently in -mm which might be from tonyb@xxxxxxxxxxxxxxx are
origin.patch
vfs-improve-comment-describing-fget_light.patch
make-shm_get_stat-more-robust.patch
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