linux-kernel - [PATCH 4.9 23/44] PCI: Prevent VPD access for QLogic ISP2722

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Message-Id: <20170316142926.934132338@linuxfoundation.org>
Date:   Thu, 16 Mar 2017 23:29:48 +0900
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ethan Zhao <ethan.zhao@...cle.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Subject: [PATCH 4.9 23/44] PCI: Prevent VPD access for QLogic ISP2722

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ethan Zhao <ethan.zhao@...cle.com>

commit 0d5370d1d85251e5893ab7c90a429464de2e140b upstream.

QLogic ISP2722-based 16/32Gb Fibre Channel to PCIe Adapter has the VPD
access issue too, while read the common pci-sysfs access interface shown as

 /sys/devices/pci0000:00/0000:00:03.2/0000:0b:00.0/vpd

with simple 'cat' could cause system hang and panic:

  Kernel panic - not syncing: An NMI occurred. Depending on your system the reason for the NMI is logged in any one of the following resources:
  1. Integrated Management Log (IML)
  2. OA Syslog
  3. OA Forward Progress Log
  4. iLO Event Log
  CPU: 0 PID: 15070 Comm: udevadm Not tainted 4.1.12
  Hardware name: HP ProLiant DL380 Gen9/ProLiant DL380 Gen9, BIOS P89 12/27/2015
   0000000000000086 000000007f0cdf51 ffff880c4fa05d58 ffffffff817193de
   ffffffffa00b42d8 0000000000000075 ffff880c4fa05dd8 ffffffff81714072
   0000000000000008 ffff880c4fa05de8 ffff880c4fa05d88 000000007f0cdf51
  Call Trace:
   <NMI>  [<ffffffff817193de>] dump_stack+0x63/0x81
   [<ffffffff81714072>] panic+0xd0/0x20e
   [<ffffffffa00b390d>] hpwdt_pretimeout+0xdd/0xe0 [hpwdt]
   [<ffffffff81021fc9>] ? sched_clock+0x9/0x10
   [<ffffffff8101c101>] nmi_handle+0x91/0x170
   [<ffffffff8101c10c>] ? nmi_handle+0x9c/0x170
   [<ffffffff8101c5fe>] io_check_error+0x1e/0xa0
   [<ffffffff8101c719>] default_do_nmi+0x99/0x140
   [<ffffffff8101c8b4>] do_nmi+0xf4/0x170
   [<ffffffff817232c5>] end_repeat_nmi+0x1a/0x1e
   [<ffffffff815d724b>] ? pci_conf1_read+0xeb/0x120
   [<ffffffff815d724b>] ? pci_conf1_read+0xeb/0x120
   [<ffffffff815d724b>] ? pci_conf1_read+0xeb/0x120
   <<EOE>>  [<ffffffff815db4b3>] raw_pci_read+0x23/0x40
   [<ffffffff815db4fc>] pci_read+0x2c/0x30
   [<ffffffff8136f612>] pci_user_read_config_word+0x72/0x110
   [<ffffffff8136f746>] pci_vpd_pci22_wait+0x96/0x130
   [<ffffffff8136ff9b>] pci_vpd_pci22_read+0xdb/0x1a0
   [<ffffffff8136ea30>] pci_read_vpd+0x20/0x30
   [<ffffffff8137d590>] read_vpd_attr+0x30/0x40
   [<ffffffff8128e037>] sysfs_kf_bin_read+0x47/0x70
   [<ffffffff8128d24e>] kernfs_fop_read+0xae/0x180
   [<ffffffff8120dd97>] __vfs_read+0x37/0x100
   [<ffffffff812ba7e4>] ? security_file_permission+0x84/0xa0
   [<ffffffff8120e366>] ? rw_verify_area+0x56/0xe0
   [<ffffffff8120e476>] vfs_read+0x86/0x140
   [<ffffffff8120f3f5>] SyS_read+0x55/0xd0
   [<ffffffff81720f2e>] system_call_fastpath+0x12/0x71
  Shutting down cpus with NMI
  Kernel Offset: disabled
  drm_kms_helper: panic occurred, switching back to text console

So blacklist the access to its VPD.

Signed-off-by: Ethan Zhao <ethan.zhao@...cle.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/pci/quirks.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2173,6 +2173,7 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LS
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LSI_LOGIC, 0x005f, quirk_blacklist_vpd);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, PCI_ANY_ID,
 		quirk_blacklist_vpd);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_QLOGIC, 0x2261, quirk_blacklist_vpd);
 
 /*
  * For Broadcom 5706, 5708, 5709 rev. A nics, any read beyond the