FAILED: patch "[PATCH] selinux: ignore unknown extended permissions" failed to apply to 5.4-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 5.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y
git checkout FETCH_HEAD
git cherry-pick -x 900f83cf376bdaf798b6f5dcb2eae0c822e908b6
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2024122322-wasp-anthem-adcd@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 900f83cf376bdaf798b6f5dcb2eae0c822e908b6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thi=C3=A9baud=20Weksteen?= <tweek@google.com>
Date: Thu, 5 Dec 2024 12:09:19 +1100
Subject: [PATCH] selinux: ignore unknown extended permissions
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

When evaluating extended permissions, ignore unknown permissions instead
of calling BUG(). This commit ensures that future permissions can be
added without interfering with older kernels.

Cc: stable@vger.kernel.org
Fixes: fa1aa143ac4a ("selinux: extended permissions for ioctls")
Signed-off-by: Thiébaud Weksteen <tweek@google.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 971c45d576ba..3d5c563cfc4c 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -979,7 +979,10 @@ void services_compute_xperms_decision(struct extended_perms_decision *xpermd,
 			return;
 		break;
 	default:
-		BUG();
+		pr_warn_once(
+			"SELinux: unknown extended permission (%u) will be ignored\n",
+			node->datum.u.xperms->specified);
+		return;
 	}
 
 	if (node->key.specified == AVTAB_XPERMS_ALLOWED) {
@@ -998,7 +1001,8 @@ void services_compute_xperms_decision(struct extended_perms_decision *xpermd,
 					    &node->datum.u.xperms->perms,
 					    xpermd->dontaudit);
 	} else {
-		BUG();
+		pr_warn_once("SELinux: unknown specified key (%u)\n",
+			     node->key.specified);
 	}
 }