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authorJan Kara <jack@suse.cz>2014-01-28 21:53:22 +0400
committerJan Kara <jack@suse.cz>2014-01-29 16:57:10 +0400
commit83c0e1b442b488571f4fef4a91c2fe52eed6c705 (patch)
treeb29a85223f2e5e166f075266edb1bf2e0ef5cf57 /include/linux
parent13116dfd13c8c9d60ea04ece13419af2de8e2e37 (diff)
downloadlinux-83c0e1b442b488571f4fef4a91c2fe52eed6c705.tar.xz
fsnotify: Do not return merged event from fsnotify_add_notify_event()
The event returned from fsnotify_add_notify_event() cannot ever be used safely as the event may be freed by the time the function returns (after dropping notification_mutex). So change the prototype to just return whether the event was added or merged into some existing event. Reported-and-tested-by: Jiri Kosina <jkosina@suse.cz> Reported-and-tested-by: Dave Jones <davej@fedoraproject.org> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/fsnotify_backend.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 7d8d5e608594..3d286ff49ab0 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -322,10 +322,10 @@ extern int fsnotify_fasync(int fd, struct file *file, int on);
extern void fsnotify_destroy_event(struct fsnotify_group *group,
struct fsnotify_event *event);
/* attach the event to the group notification queue */
-extern struct fsnotify_event *fsnotify_add_notify_event(struct fsnotify_group *group,
- struct fsnotify_event *event,
- struct fsnotify_event *(*merge)(struct list_head *,
- struct fsnotify_event *));
+extern int fsnotify_add_notify_event(struct fsnotify_group *group,
+ struct fsnotify_event *event,
+ int (*merge)(struct list_head *,
+ struct fsnotify_event *));
/* true if the group notification queue is empty */
extern bool fsnotify_notify_queue_is_empty(struct fsnotify_group *group);
/* return, but do not dequeue the first event on the notification queue */