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| author | Al Viro <viro@zeniv.linux.org.uk> | 2020-08-23 01:25:52 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-26 12:49:19 +0300 |
| commit | d9903e8c2576d9c933ae55fc4bab1f55e85f66e0 (patch) | |
| tree | 7fc6e49939b4e9415749a6b01a212b88d80acac8 | |
| parent | 1f802ace4bd5a2762a2e8637f2ea1e3aa31fb0d5 (diff) | |
| download | linux-d9903e8c2576d9c933ae55fc4bab1f55e85f66e0.tar.xz | |
do_epoll_ctl(): clean the failure exits up a bit
commit 52c479697c9b73f628140dcdfcd39ea302d05482 upstream.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/eventpoll.c | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 196003d9242c..e0decff22ae2 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -2203,29 +2203,22 @@ int do_epoll_ctl(int epfd, int op, int fd, struct epoll_event *epds, full_check = 1; if (is_file_epoll(tf.file)) { error = -ELOOP; - if (ep_loop_check(ep, tf.file) != 0) { - clear_tfile_check_list(); + if (ep_loop_check(ep, tf.file) != 0) goto error_tgt_fput; - } } else { get_file(tf.file); list_add(&tf.file->f_tfile_llink, &tfile_check_list); } error = epoll_mutex_lock(&ep->mtx, 0, nonblock); - if (error) { -out_del: - list_del(&tf.file->f_tfile_llink); - if (!is_file_epoll(tf.file)) - fput(tf.file); + if (error) goto error_tgt_fput; - } if (is_file_epoll(tf.file)) { tep = tf.file->private_data; error = epoll_mutex_lock(&tep->mtx, 1, nonblock); if (error) { mutex_unlock(&ep->mtx); - goto out_del; + goto error_tgt_fput; } } } @@ -2246,8 +2239,6 @@ out_del: error = ep_insert(ep, epds, tf.file, fd, full_check); } else error = -EEXIST; - if (full_check) - clear_tfile_check_list(); break; case EPOLL_CTL_DEL: if (epi) @@ -2270,8 +2261,10 @@ out_del: mutex_unlock(&ep->mtx); error_tgt_fput: - if (full_check) + if (full_check) { + clear_tfile_check_list(); mutex_unlock(&epmutex); + } fdput(tf); error_fput: |