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authorAl Viro <viro@zeniv.linux.org.uk>2020-08-22 18:25:52 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2020-08-22 18:25:52 -0400
commit52c479697c9b73f628140dcdfcd39ea302d05482 (patch)
tree26e09326f93e964e32d2df19fc94554070b607ce /fs/eventpoll.c
parenta9ed4a6560b8562b7e2e2bed9527e88001f7b682 (diff)
downloadlinux-52c479697c9b73f628140dcdfcd39ea302d05482.tar.bz2
do_epoll_ctl(): clean the failure exits up a bit
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/eventpoll.c')
-rw-r--r--fs/eventpoll.c19
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: