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authorLino Sanfilippo <LinoSanfilippo@gmx.de>2015-02-11 01:08:21 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-11 01:30:28 +0300
commita118449a7792ea800db6f23cf6c1d2f937c2629a (patch)
tree97b1d34b544a9367ecb19035e7b6dcb231254004 /fs/notify
parentece84b390ab0ceada9c771749455f3594c36e3df (diff)
downloadlinux-a118449a7792ea800db6f23cf6c1d2f937c2629a.tar.xz
fanotify: only destroy mark when both mask and ignored_mask are cleared
In fanotify_mark_remove_from_mask() a mark is destroyed if only one of both bitmasks (mask or ignored_mask) of a mark is cleared. However the other mask may still be set and contain information that should not be lost. So only destroy a mark if both masks are cleared. Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de> Reviewed-by: Jan Kara <jack@suse.cz> Cc: Eric Paris <eparis@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/notify')
-rw-r--r--fs/notify/fanotify/fanotify_user.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index bff8567aa42d..25adb6d1b3db 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -497,10 +497,9 @@ static __u32 fanotify_mark_remove_from_mask(struct fsnotify_mark *fsn_mark,
oldmask = fsn_mark->ignored_mask;
fsnotify_set_mark_ignored_mask_locked(fsn_mark, (oldmask & ~mask));
}
+ *destroy = !(fsn_mark->mask | fsn_mark->ignored_mask);
spin_unlock(&fsn_mark->lock);
- *destroy = !(oldmask & ~mask);
-
return mask & oldmask;
}