The patch titled
epoll: handle -EFAULT better
has been added to the -mm tree. Its filename is
epoll-handle-efault-better.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: epoll: handle -EFAULT better
From: Eric Dumazet <dada1@xxxxxxxxxxxxx>
In case a fault occurs during copy_to_user(), we should report the count of
events that were successfully copied into user space, instead of EFAULT.
That would be consistent with behavior of read/write() syscalls for
example.
Signed-off-by: Eric Dumazet <dada1@xxxxxxxxxxxxx>
Cc: Davide Libenzi <davidel@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
fs/eventpoll.c | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
diff -puN fs/eventpoll.c~epoll-handle-efault-better fs/eventpoll.c
--- a/fs/eventpoll.c~epoll-handle-efault-better
+++ a/fs/eventpoll.c
@@ -1447,7 +1447,7 @@ static int ep_send_events(struct eventpo
&events[eventcnt].events) ||
__put_user(epi->event.data,
&events[eventcnt].data))
- return -EFAULT;
+ return eventcnt ? eventcnt : -EFAULT;
if (epi->event.events & EPOLLONESHOT)
epi->event.events &= EP_PRIVATE_BITS;
eventcnt++;
_
Patches currently in -mm which might be from dada1@xxxxxxxxxxxxx are
vmalloc-optimization-cleanup-bugfixes.patch
vmalloc-optimization-cleanup-bugfixes-tweak.patch
epoll-handle-efault-better.patch
-
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