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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2013-07-09 02:59:40 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-09 21:33:19 +0400 |
| commit | de1e0c40aceb9d5bff09c3a3b97b2f1b178af53f (patch) | |
| tree | 128cd291a84aa596486f057259308dc6ae529585 | |
| parent | b9ce54c9f59894e787e3067d2f758c297fcd6fd0 (diff) | |
| download | linux-de1e0c40aceb9d5bff09c3a3b97b2f1b178af53f.tar.xz | |
fanotify: info leak in copy_event_to_user()
The ->reserved field isn't cleared so we leak one byte of stack
information to userspace.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Eric Paris <eparis@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/notify/fanotify/fanotify_user.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index 1ea52f7c031f..e16076d386c4 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -122,6 +122,7 @@ static int fill_event_metadata(struct fsnotify_group *group, metadata->event_len = FAN_EVENT_METADATA_LEN; metadata->metadata_len = FAN_EVENT_METADATA_LEN; metadata->vers = FANOTIFY_METADATA_VERSION; + metadata->reserved = 0; metadata->mask = event->mask & FAN_ALL_OUTGOING_EVENTS; metadata->pid = pid_vnr(event->tgid); if (unlikely(event->mask & FAN_Q_OVERFLOW)) |