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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: Marc Zyngier <maz@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -2195,10 +2195,8 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd,
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mutex_lock(&epmutex);
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if (is_file_epoll(tf.file)) {
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error = -ELOOP;
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if (ep_loop_check(ep, tf.file) != 0) {
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clear_tfile_check_list();
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if (ep_loop_check(ep, tf.file) != 0)
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goto error_tgt_fput;
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}
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} else {
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get_file(tf.file);
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list_add(&tf.file->f_tfile_llink,
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@ -2227,8 +2225,6 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd,
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error = ep_insert(ep, &epds, tf.file, fd, full_check);
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} else
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error = -EEXIST;
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if (full_check)
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clear_tfile_check_list();
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break;
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case EPOLL_CTL_DEL:
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if (epi)
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@ -2251,8 +2247,10 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd,
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mutex_unlock(&ep->mtx);
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error_tgt_fput:
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if (full_check)
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if (full_check) {
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clear_tfile_check_list();
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mutex_unlock(&epmutex);
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}
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fdput(tf);
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error_fput:
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