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authorAl Viro <viro@zeniv.linux.org.uk>2020-09-26 21:54:05 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2020-10-26 01:01:54 +0100
commitd16312a46936baa1a44b5f78394f4b0d1d01762a (patch)
tree08df6e4b5befc041a859dae0e89e30b4634287f0 /fs/eventpoll.c
parentreverse_path_check_proc(): don't bother with cookies (diff)
downloadlinux-d16312a46936baa1a44b5f78394f4b0d1d01762a.tar.xz
linux-d16312a46936baa1a44b5f78394f4b0d1d01762a.zip
clean reverse_path_check_proc() a bit
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/eventpoll.c')
-rw-r--r--fs/eventpoll.c26
1 files changed, 9 insertions, 17 deletions
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 0f540e91aa92..33af838046ea 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1317,23 +1317,15 @@ static int reverse_path_check_proc(struct file *file, int depth)
/* CTL_DEL can remove links here, but that can't increase our count */
rcu_read_lock();
list_for_each_entry_rcu(epi, &file->f_ep_links, fllink) {
- struct file *child_file = epi->ep->file;
- if (is_file_epoll(child_file)) {
- if (list_empty(&child_file->f_ep_links)) {
- if (path_count_inc(depth)) {
- error = -1;
- break;
- }
- } else {
- error = reverse_path_check_proc(child_file,
- depth + 1);
- }
- if (error != 0)
- break;
- } else {
- printk(KERN_ERR "reverse_path_check_proc: "
- "file is not an ep!\n");
- }
+ struct file *recepient = epi->ep->file;
+ if (WARN_ON(!is_file_epoll(recepient)))
+ continue;
+ if (list_empty(&recepient->f_ep_links))
+ error = path_count_inc(depth);
+ else
+ error = reverse_path_check_proc(recepient, depth + 1);
+ if (error != 0)
+ break;
}
rcu_read_unlock();
return error;