linux/fs/notify
Will Woods 1e2ee49f7f fanotify: fix -EOVERFLOW with large files on 64-bit
On 64-bit systems, O_LARGEFILE is automatically added to flags inside
the open() syscall (also openat(), blkdev_open(), etc).  Userspace
therefore defines O_LARGEFILE to be 0 - you can use it, but it's a
no-op.  Everything should be O_LARGEFILE by default.

But: when fanotify does create_fd() it uses dentry_open(), which skips
all that.  And userspace can't set O_LARGEFILE in fanotify_init()
because it's defined to 0.  So if fanotify gets an event regarding a
large file, the read() will just fail with -EOVERFLOW.

This patch adds O_LARGEFILE to fanotify_init()'s event_f_flags on 64-bit
systems, using the same test as open()/openat()/etc.

Addresses https://bugzilla.redhat.com/show_bug.cgi?id=696821

Signed-off-by: Will Woods <wwoods@redhat.com>
Acked-by: Eric Paris <eparis@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-05-06 13:04:59 -07:00
..
dnotify inotify: Fix reporting of cookies for inotify events 2014-02-18 11:17:17 +01:00
fanotify fanotify: fix -EOVERFLOW with large files on 64-bit 2014-05-06 13:04:59 -07:00
inotify fsnotify: Allocate overflow events with proper type 2014-02-25 11:18:06 +01:00
Kconfig fanotify: allow fanotify to be built 2010-10-28 17:22:13 -04:00
Makefile fs, notify: add procfs fdinfo helper 2012-12-17 17:15:28 -08:00
fdinfo.c Merge branch 'for-next' of git://git.infradead.org/users/eparis/notify 2012-12-20 20:11:52 -08:00
fdinfo.h fs, notify: add procfs fdinfo helper 2012-12-17 17:15:28 -08:00
fsnotify.c inotify: Fix reporting of cookies for inotify events 2014-02-18 11:17:17 +01:00
fsnotify.h fsnotify: remove global fsnotify groups lists 2010-07-28 10:18:54 -04:00
group.c fsnotify: Allocate overflow events with proper type 2014-02-25 11:18:06 +01:00
inode_mark.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
mark.c fsnotify: update comments concerning locking scheme 2013-07-09 10:33:20 -07:00
notification.c fsnotify: Allocate overflow events with proper type 2014-02-25 11:18:06 +01:00
vfsmount_mark.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00