Fix oops on invalid AMD microcode load (rhbz 797559)
This commit is contained in:
Josh Boyer
parent
b8614ae383
commit
210099fb2c
10
kernel.spec
10
kernel.spec
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@ -704,6 +704,9 @@ Patch21520: KVM-Ensure-all-vcpus-are-consistent-with-in-kernel-i.patch
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#rhbz 808559
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Patch21530: ALSA-hda-realtek-Add-quirk-for-Mac-Pro-5-1-machines.patch
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Patch21700: x86-microcode-Fix-sysfs-warning-during-module-unload-on-unsupported-CPUs.patch
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Patch21701: x86-microcode-Ensure-that-module-is-only-loaded-for-supported-AMD-CPUs.patch
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Patch22000: weird-root-dentry-name-debug.patch
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%endif
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@ -1302,6 +1305,10 @@ ApplyPatch libata-disable-runtime-pm-for-hotpluggable-port.patch
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ApplyPatch x86-Use-correct-byte-sized-register-constraint-in-__xchg_op.patch
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ApplyPatch x86-Use-correct-byte-sized-register-constraint-in-__add.patch
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#rhbz 797559
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ApplyPatch x86-microcode-Fix-sysfs-warning-during-module-unload-on-unsupported-CPUs.patch
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ApplyPatch x86-microcode-Ensure-that-module-is-only-loaded-for-supported-AMD-CPUs.patch
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# END OF PATCH APPLICATIONS
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%endif
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@ -1954,6 +1961,9 @@ fi
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# and build.
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%changelog
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* Tue Apr 17 2012 Josh Boyer <jwboyer@redhat.com>
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- Fix oops on invalid AMD microcode load (rhbz 797559)
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* Sat Apr 14 2012 Josh Boyer <jwboyer@redhat.com>
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- Add ALSA quirk for MacPro 5,1 machines (rhbz 808559)
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@ -0,0 +1,163 @@
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Path: news.gmane.org!not-for-mail
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From: Borislav Petkov <borislav.petkov@amd.com>
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Newsgroups: gmane.linux.kernel
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Subject: [PATCH 2/2] x86, microcode: Ensure that module is only loaded for
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Date: Thu, 12 Apr 2012 18:34:22 +0200
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From: Andreas Herrmann <andreas.herrmann3@amd.com>
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Date: Thu, 12 Apr 2012 16:51:57 +0200
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Subject: [PATCH 2/2] x86, microcode: Ensure that module is only loaded for supported AMD CPUs
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Exit early when there's no support for a particular CPU family. Also,
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fixup the "no support for this CPU vendor" to be issued only when the
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driver is attempted to be loaded on an unsupported vendor.
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Cc: stable@vger.kernel.org
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Cc: Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
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Cc: Borislav Petkov <borislav.petkov@amd.com>
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[Boris: added a commit msg because Andreas is lazy]
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Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
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---
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arch/x86/kernel/microcode_amd.c | 12 +++++++-----
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arch/x86/kernel/microcode_core.c | 6 +++---
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2 files changed, 10 insertions(+), 8 deletions(-)
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diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c
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index 73465aa..8a2ce8f 100644
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--- a/arch/x86/kernel/microcode_amd.c
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+++ b/arch/x86/kernel/microcode_amd.c
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@@ -82,11 +82,6 @@ static int collect_cpu_info_amd(int cpu, struct cpu_signature *csig)
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{
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struct cpuinfo_x86 *c = &cpu_data(cpu);
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- if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 0x10) {
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- pr_warning("CPU%d: family %d not supported\n", cpu, c->x86);
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- return -1;
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- }
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-
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csig->rev = c->microcode;
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pr_info("CPU%d: patch_level=0x%08x\n", cpu, csig->rev);
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@@ -380,6 +375,13 @@ static struct microcode_ops microcode_amd_ops = {
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struct microcode_ops * __init init_amd_microcode(void)
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{
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+ struct cpuinfo_x86 *c = &cpu_data(0);
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+
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+ if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 0x10) {
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+ pr_warning("AMD CPU family 0x%x not supported\n", c->x86);
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+ return NULL;
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+ }
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+
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patch = (void *)get_zeroed_page(GFP_KERNEL);
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if (!patch)
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return NULL;
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diff --git a/arch/x86/kernel/microcode_core.c b/arch/x86/kernel/microcode_core.c
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index d389e74..c9bda6d 100644
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--- a/arch/x86/kernel/microcode_core.c
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+++ b/arch/x86/kernel/microcode_core.c
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@@ -526,11 +526,11 @@ static int __init microcode_init(void)
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microcode_ops = init_intel_microcode();
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else if (c->x86_vendor == X86_VENDOR_AMD)
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microcode_ops = init_amd_microcode();
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-
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- if (!microcode_ops) {
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+ else
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pr_err("no support for this CPU vendor\n");
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+
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+ if (!microcode_ops)
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return -ENODEV;
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- }
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microcode_pdev = platform_device_register_simple("microcode", -1,
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NULL, 0);
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--
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1.7.8.4
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--
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Regards/Gruss,
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Boris.
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Advanced Micro Devices GmbH
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Einsteinring 24, 85609 Dornach
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GM: Alberto Bozzo
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Reg: Dornach, Landkreis Muenchen
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HRB Nr. 43632 WEEE Registernr: 129 19551
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@ -0,0 +1,167 @@
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Path: news.gmane.org!not-for-mail
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From: Borislav Petkov <borislav.petkov@amd.com>
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Newsgroups: gmane.linux.kernel
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Subject: [PATCH 1/2] x86, microcode: Fix sysfs warning during module unload
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Date: Thu, 12 Apr 2012 18:30:38 +0200
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From: Andreas Herrmann <andreas.herrmann3@amd.com>
|
||||
Date: Thu, 12 Apr 2012 16:48:01 +0200
|
||||
Subject: [PATCH 1/2] x86, microcode: Fix sysfs warning during module unload on unsupported CPUs
|
||||
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||||
Loading microcode driver on an unsupported CPU and subsequently
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unloading the driver causes
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WARNING: at fs/sysfs/group.c:138 mc_device_remove+0x5f/0x70 [microcode]()
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Hardware name: 01972NG
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sysfs group ffffffffa00013d0 not found for kobject 'cpu0'
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Modules linked in: snd_hda_codec_hdmi snd_hda_codec_conexant snd_hda_intel btusb snd_hda_codec bluetooth thinkpad_acpi rfkill microcode(-) [last unloaded: cfg80211]
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Pid: 4560, comm: modprobe Not tainted 3.4.0-rc2-00002-g258f742 #5
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Call Trace:
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[<ffffffff8103113b>] ? warn_slowpath_common+0x7b/0xc0
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[<ffffffff81031235>] ? warn_slowpath_fmt+0x45/0x50
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[<ffffffff81120e74>] ? sysfs_remove_group+0x34/0x120
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[<ffffffffa00000ef>] ? mc_device_remove+0x5f/0x70 [microcode]
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[<ffffffff81331eb9>] ? subsys_interface_unregister+0x69/0xa0
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[<ffffffff81563526>] ? mutex_lock+0x16/0x40
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[<ffffffffa0000c3e>] ? microcode_exit+0x50/0x92 [microcode]
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[<ffffffff8107051d>] ? sys_delete_module+0x16d/0x260
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[<ffffffff810a0065>] ? wait_iff_congested+0x45/0x110
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[<ffffffff815656af>] ? page_fault+0x1f/0x30
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[<ffffffff81565ba2>] ? system_call_fastpath+0x16/0x1b
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on recent kernels.
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This is due to
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|
||||
commit 8a25a2fd126c621f44f3aeaef80d51f00fc11639
|
||||
(cpu: convert 'cpu' and 'machinecheck' sysdev_class to a regular
|
||||
subsystem)
|
||||
|
||||
which renders
|
||||
|
||||
commit 6c53cbfced048c421e4f72cb2183465f68fbc5e7
|
||||
(x86, microcode: Correct sysdev_add error path)
|
||||
|
||||
useless.
|
||||
|
||||
See http://marc.info/?l=linux-kernel&m=133416246406478
|
||||
|
||||
Avoid above warning by restoring the old driver behaviour before
|
||||
commit 6c53cbfced048c421e4f72cb2183465f68fbc5e7 (x86, microcode:
|
||||
Correct sysdev_add error path)
|
||||
|
||||
Cc: stable@vger.kernel.org
|
||||
Cc: Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
|
||||
Cc: Borislav Petkov <borislav.petkov@amd.com>
|
||||
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
|
||||
---
|
||||
arch/x86/kernel/microcode_core.c | 4 +---
|
||||
1 files changed, 1 insertions(+), 3 deletions(-)
|
||||
|
||||
diff --git a/arch/x86/kernel/microcode_core.c b/arch/x86/kernel/microcode_core.c
|
||||
index 87a0f86..d389e74 100644
|
||||
--- a/arch/x86/kernel/microcode_core.c
|
||||
+++ b/arch/x86/kernel/microcode_core.c
|
||||
@@ -419,10 +419,8 @@ static int mc_device_add(struct device *dev, struct subsys_interface *sif)
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
- if (microcode_init_cpu(cpu) == UCODE_ERROR) {
|
||||
- sysfs_remove_group(&dev->kobj, &mc_attr_group);
|
||||
+ if (microcode_init_cpu(cpu) == UCODE_ERROR)
|
||||
return -EINVAL;
|
||||
- }
|
||||
|
||||
return err;
|
||||
}
|
||||
--
|
||||
1.7.8.4
|
||||
|
||||
--
|
||||
Regards/Gruss,
|
||||
Boris.
|
||||
|
||||
Advanced Micro Devices GmbH
|
||||
Einsteinring 24, 85609 Dornach
|
||||
GM: Alberto Bozzo
|
||||
Reg: Dornach, Landkreis Muenchen
|
||||
HRB Nr. 43632 WEEE Registernr: 129 19551
|
||||
|
||||
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Reference in New Issue