- fix systemd-readahead: Failed to read event: File too large

diff --git a/kernel-small_fixes.patch b/kernel-small_fixes.patch
index 9b809da2c299549c8830af6df1b202593eafc761..d1296b8c527a0be7630edefbaa86a61edda2b1ff 100644 (file)
--- a/kernel-small_fixes.patch
+++ b/kernel-small_fixes.patch
@@ -77,3 +77,45 @@ index 7a0c800..ec5ebbb 100644
                /* purge any lower objects after partial_lookup */
                if (bindex < orig_bstart || bindex > orig_bend) {
                        dput(lower_dentry);
+From 1e2ee49f7f1b79f0b14884fe6a602f0411b39552 Mon Sep 17 00:00:00 2001
+From: Will Woods <wwoods@redhat.com>
+Date: Tue, 6 May 2014 12:50:10 -0700
+Subject: 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>
+
+diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
+index 4e565c8..732648b 100644
+--- a/fs/notify/fanotify/fanotify_user.c
++++ b/fs/notify/fanotify/fanotify_user.c
+@@ -698,6 +698,8 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
+       }
+       group->overflow_event = &oevent->fse;
+ 
++      if (force_o_largefile())
++              event_f_flags |= O_LARGEFILE;
+       group->fanotify_data.f_flags = event_f_flags;
+ #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
+       spin_lock_init(&group->fanotify_data.access_lock);
+-- 
+cgit v0.10.1
+