linux-kernel - [PATCH v2 2/3] nvme: prevent admin controller from smart log fetch (LID 2)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250702005830.889217-3-kamaljit.singh1@wdc.com>
Date: Tue,  1 Jul 2025 17:58:28 -0700
From: Kamaljit Singh <kamaljit.singh1@....com>
To: kbusch@...nel.org,
	axboe@...nel.dk,
	hch@....de,
	sagi@...mberg.me,
	linux-nvme@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc: cassel@...nel.org,
	dlemoal@...nel.org,
	kamaljit.singh1@....com
Subject: [PATCH v2 2/3] nvme: prevent admin controller from smart log fetch (LID 2)

Similar to a discovery ctrl, prevent an admin-ctrl from getting a smart
log. LID 2 is optional for admin controllers to support.

In the future when support for the newly added LID=0 (supported log
pages) is added, GLP accesses can be made smarter by basing such calls
on response from LID=0 reads.

Reference: NVMe Base rev 2.2, sec 3.1.3.5, fig 31.

Signed-off-by: Kamaljit Singh <kamaljit.singh1@....com>
---
 drivers/nvme/host/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index a1155fb8d5be..c310634e75f3 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -3705,7 +3705,7 @@ int nvme_init_ctrl_finish(struct nvme_ctrl *ctrl, bool was_suspended)
 
 	nvme_configure_opal(ctrl, was_suspended);
 
-	if (!ctrl->identified && !nvme_discovery_ctrl(ctrl)) {
+	if (!ctrl->identified && !nvme_discovery_ctrl(ctrl) && !nvme_admin_ctrl(ctrl)) {
 		/*
 		 * Do not return errors unless we are in a controller reset,
 		 * the controller works perfectly fine without hwmon.
-- 
2.43.0