From: Al Viro viro@zeniv.linux.org.uk
commit 52c479697c9b73f628140dcdfcd39ea302d05482 upstream.
Signed-off-by: Al Viro viro@zeniv.linux.org.uk Signed-off-by: Marc Zyngier maz@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/eventpoll.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-)
--- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -1946,10 +1946,8 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, in mutex_lock(&epmutex); 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, @@ -1978,8 +1976,6 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, in 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) @@ -2002,8 +1998,10 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, in mutex_unlock(&ep->mtx);
error_tgt_fput: - if (full_check) + if (full_check) { + clear_tfile_check_list(); mutex_unlock(&epmutex); + }
fdput(tf); error_fput: