From a8c663bb42612afb58965c091846ee026bc702fc Mon Sep 17 00:00:00 2001
From: Konstantin Belousov <kib@FreeBSD.org>
Date: Fri, 20 Sep 2024 15:58:59 +0300
Subject: [PATCH] pipespace_new(): decrease uidinfo pipebuf usage if
 reservation check failed

(cherry picked from commit 40769168a5ee227b96ea91768555eef332a0dc26)
---
 sys/kern/sys_pipe.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/kern/sys_pipe.c b/sys/kern/sys_pipe.c
index 380bc165cef..20bedd665ca 100644
--- a/sys/kern/sys_pipe.c
+++ b/sys/kern/sys_pipe.c
@@ -596,6 +596,7 @@ retry:
 	if (priv_check(curthread, PRIV_PIPEBUF) != 0 && maxpipekva / 100 *
 	    (100 - pipebuf_reserv) < amountpipekva + size) {
 		vm_map_unlock(pipe_map);
+		chgpipecnt(cpipe->pipe_pair->pp_owner->cr_ruidinfo, -size, 0);
 		if (cpipe->pipe_buffer.buffer == NULL &&
 		    size > SMALL_PIPE_SIZE) {
 			size = SMALL_PIPE_SIZE;