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| author | Lino Sanfilippo <LinoSanfilippo@gmx.de> | 2010-11-24 18:26:04 +0100 |
|---|---|---|
| committer | Eric Paris <eparis@redhat.com> | 2010-12-07 16:14:24 -0500 |
| commit | fdbf3ceeb659f0b3c0e8dd79b331b7ac05910f1e (patch) | |
| tree | 72ed0abad8e550cfa54d83c677d3a9baba28f110 /fs/notify | |
| parent | e9a3854fd4ff3907e6c200a3980e19365ee695e9 (diff) | |
| download | linux-stable-fdbf3ceeb659f0b3c0e8dd79b331b7ac05910f1e.tar.gz linux-stable-fdbf3ceeb659f0b3c0e8dd79b331b7ac05910f1e.tar.bz2 linux-stable-fdbf3ceeb659f0b3c0e8dd79b331b7ac05910f1e.zip | |
fanotify: Dont try to open a file descriptor for the overflow event
We should not try to open a file descriptor for the overflow event since this
will always fail.
Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Signed-off-by: Eric Paris <eparis@redhat.com>
Diffstat (limited to 'fs/notify')
| -rw-r--r-- | fs/notify/fanotify/fanotify_user.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index ca54957b1f61..dccd7985e65a 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -110,6 +110,8 @@ static int fill_event_metadata(struct fsnotify_group *group, struct fanotify_event_metadata *metadata, struct fsnotify_event *event) { + int ret = 0; + pr_debug("%s: group=%p metadata=%p event=%p\n", __func__, group, metadata, event); @@ -117,9 +119,15 @@ static int fill_event_metadata(struct fsnotify_group *group, metadata->vers = FANOTIFY_METADATA_VERSION; metadata->mask = event->mask & FAN_ALL_OUTGOING_EVENTS; metadata->pid = pid_vnr(event->tgid); - metadata->fd = create_fd(group, event); + if (unlikely(event->mask & FAN_Q_OVERFLOW)) + metadata->fd = FAN_NOFD; + else { + metadata->fd = create_fd(group, event); + if (metadata->fd < 0) + ret = metadata->fd; + } - return metadata->fd; + return ret; } #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS @@ -261,7 +269,7 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group, if (ret < 0) goto out; - fd = ret; + fd = fanotify_event_metadata.fd; ret = prepare_for_access_response(group, event, fd); if (ret) goto out_close_fd; @@ -275,7 +283,8 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group, out_kill_access_response: remove_access_response(group, event, fd); out_close_fd: - sys_close(fd); + if (fd != FAN_NOFD) + sys_close(fd); out: #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS if (event->mask & FAN_ALL_PERM_EVENTS) { |