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-next>] [day] [month] [year] [list]
Message-Id: <20240415215210.2824868-1-srinivas.pandruvada@linux.intel.com>
Date: Mon, 15 Apr 2024 14:52:10 -0700
From: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To: hdegoede@...hat.com,
	ilpo.jarvinen@...ux.intel.com
Cc: platform-driver-x86@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	stable@...r.kernel.org
Subject: [PATCH] platform/x86/intel-uncore-freq: Don't present root domain on error

If none of the clusters are added because of some error, fail to load
driver without presenting root domain. In this case root domain will
present invalid data.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Fixes: 01c10f88c9b7 ("platform/x86/intel-uncore-freq: tpmi: Provide cluster level control")
Cc: <stable@...r.kernel.org> # 6.5+
---
This error can be reproduced in the pre production hardware only.
So can go through regular cycle and they apply to stable.

 .../x86/intel/uncore-frequency/uncore-frequency-tpmi.c     | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c
index bd75d61ff8a6..587437211d72 100644
--- a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c
+++ b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c
@@ -240,6 +240,7 @@ static int uncore_probe(struct auxiliary_device *auxdev, const struct auxiliary_
 	bool read_blocked = 0, write_blocked = 0;
 	struct intel_tpmi_plat_info *plat_info;
 	struct tpmi_uncore_struct *tpmi_uncore;
+	bool uncore_sysfs_added = false;
 	int ret, i, pkg = 0;
 	int num_resources;
 
@@ -384,9 +385,15 @@ static int uncore_probe(struct auxiliary_device *auxdev, const struct auxiliary_
 			}
 			/* Point to next cluster offset */
 			cluster_offset >>= UNCORE_MAX_CLUSTER_PER_DOMAIN;
+			uncore_sysfs_added = true;
 		}
 	}
 
+	if (!uncore_sysfs_added) {
+		ret = -ENODEV;
+		goto remove_clusters;
+	}
+
 	auxiliary_set_drvdata(auxdev, tpmi_uncore);
 
 	tpmi_uncore->root_cluster.root_domain = true;
-- 
2.40.1


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ