linux-kernel - [PATCH]PCIe AER: reject aer inject if hardware mask error reporting

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: <20091211234855.GB7196@youquan-linux.bj.intel.com>
Date:	Fri, 11 Dec 2009 18:48:55 -0500
From:	"Youquan,Song" <youquan.song@...ux.intel.com>
To:	jbarnes@...tuousgeek.org
Cc:	andi@...stfloor.org, ying.huang@...el.com, kent.liu@...el.com,
	youquan.song@...el.com, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org
Subject: [PATCH]PCIe AER: reject aer inject if hardware mask error reporting

Correcteable/Uncorrectable Error Mask Register are used by PCIe AER driver 
which will controls the reporting of idividual errors to PCIe RC via PCIe
error messages. 

If hardware masks special error reporting to RC, the aer_inject driver should
 not inject aer error.

Signed-off-by: Youquan, Song <youquan.song@...el.com>
Acked-by: Ying, Huang <ying.huang@...el.com>
---

diff --git a/drivers/pci/pcie/aer/aer_inject.c b/drivers/pci/pcie/aer/aer_inject.c
index ad77f0c..fa2bc22 100644
--- a/drivers/pci/pcie/aer/aer_inject.c
+++ b/drivers/pci/pcie/aer/aer_inject.c
@@ -302,7 +302,7 @@ static int aer_inject(struct aer_error_inj *einj)
 	unsigned long flags;
 	unsigned int devfn = PCI_DEVFN(einj->dev, einj->fn);
 	int pos_cap_err, rp_pos_cap_err;
-	u32 sever;
+	u32 sever, mask;
 	int ret = 0;
 
 	dev = pci_get_bus_and_slot(einj->bus, devfn);
@@ -354,6 +354,22 @@ static int aer_inject(struct aer_error_inj *einj)
 	err->header_log2 = einj->header_log2;
 	err->header_log3 = einj->header_log3;
 
+	pci_read_config_dword(dev, pos_cap_err + PCI_ERR_COR_MASK, &mask);
+	if (einj->cor_status && !(einj->cor_status & ~mask)) {
+		ret = -EINVAL;
+		printk(KERN_WARNING "The correctable error is masked by device\n");
+		spin_unlock_irqrestore(&inject_lock, flags);
+		goto out_put;
+	}
+
+	pci_read_config_dword(dev, pos_cap_err + PCI_ERR_UNCOR_MASK, &mask);
+	if (einj->uncor_status && !(einj->uncor_status & ~mask)) {
+		ret = -EINVAL;
+		printk(KERN_WARNING "The uncorrectable error is masked by device\n");
+		spin_unlock_irqrestore(&inject_lock, flags);
+		goto out_put;
+	}
+
 	rperr = __find_aer_error_by_dev(rpdev);
 	if (!rperr) {
 		rperr = rperr_alloc;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/