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author | Ethan Zhao <ethan.zhao@oracle.com> | 2017-02-27 08:08:44 (GMT) |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-18 11:14:30 (GMT) |
commit | ed99f5a09cc6ef662fd29a4ad50b221608a635a8 (patch) | |
tree | ec5c1ecde5fcdcfac4c15f80c7229003e9c47023 /drivers/pci/setup-res.c | |
parent | 1ced52ead2441c493afd80209dec5903f6cdc04a (diff) | |
download | linux-ed99f5a09cc6ef662fd29a4ad50b221608a635a8.tar.xz |
PCI: Prevent VPD access for QLogic ISP2722
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@oracle.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pci/setup-res.c')
0 files changed, 0 insertions, 0 deletions