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Date: Fri, 10 Nov 2017 10:42:55 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Prarit Bhargava <prarit@...hat.com>
Cc: linux-kernel@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>,
Prarit Bhargava <prarit@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
Peter Zijlstra <peterz@...radead.org>,
Dave Hansen <dave.hansen@...el.com>,
Piotr Luc <piotr.luc@...el.com>,
Kan Liang <kan.liang@...el.com>, Borislav Petkov <bp@...e.de>,
Stephane Eranian <eranian@...gle.com>,
Arvind Yadav <arvind.yadav.cs@...il.com>,
Andy Lutomirski <luto@...nel.org>,
Christian Borntraeger <borntraeger@...ibm.com>,
"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
Tom Lendacky <thomas.lendacky@....com>,
He Chen <he.chen@...ux.intel.com>,
Mathias Krause <minipli@...glemail.com>,
Tim Chen <tim.c.chen@...ux.intel.com>,
Vitaly Kuznetsov <vkuznets@...hat.com>, lkp@...org
Subject: [lkp-robot] [x86/topology] 4b5ebf8be9: BUG:KASAN:slab-out-of-bounds
FYI, we noticed the following commit (built with gcc-6):
commit: 4b5ebf8be96f75fbdd95ecf7db732142f2df3c04 ("x86/topology: Avoid wasting 128k for package id array")
url: https://github.com/0day-ci/linux/commits/Prarit-Bhargava/perf-x86-intel-uncore-Cache-logical-pkg-id-in-uncore-driver/20171107-030032
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -cpu IvyBridge -smp 4 -m 2G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+------------------------------+------------+------------+
| | 599e195495 | 4b5ebf8be9 |
+------------------------------+------------+------------+
| boot_successes | 8 | 0 |
| boot_failures | 0 | 8 |
| BUG:KASAN:slab-out-of-bounds | 0 | 8 |
+------------------------------+------------+------------+
[ 0.010000] BUG: KASAN: slab-out-of-bounds in topology_update_package_map+0xcc/0x15d
[ 0.010000] Read of size 4 at addr ffff8800614ea000 by task swapper/1/0
[ 0.010000]
[ 0.010000] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.12.0-rc7-00079-g4b5ebf8 #1
[ 0.010000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 0.010000] Call Trace:
[ 0.010000] dump_stack+0xb8/0x10e
[ 0.010000] print_address_description+0x76/0x233
[ 0.010000] ? topology_phys_to_logical_pkg+0x6e/0x7f
[ 0.010000] kasan_report+0x20f/0x23c
[ 0.010000] ? topology_update_package_map+0xcc/0x15d
[ 0.010000] check_memory_region+0x12b/0x130
[ 0.010000] memcpy+0x23/0x4c
[ 0.010000] topology_update_package_map+0xcc/0x15d
[ 0.010000] identify_secondary_cpu+0xc2/0xe9
[ 0.010000] smp_store_cpu_info+0x78/0x7f
[ 0.010000] start_secondary+0x9d/0x196
[ 0.010000] secondary_startup_64+0x9f/0x9f
[ 0.010000]
[ 0.010000] Allocated by task 1:
[ 0.010000] save_stack_trace+0x1b/0x1d
[ 0.010000] kasan_kmalloc+0xd7/0x173
[ 0.010000] __kmalloc+0x258/0x3cd
[ 0.010000] topology_update_package_map+0x75/0x15d
[ 0.010000] smp_store_boot_cpu_info+0x115/0x13a
[ 0.010000] native_smp_prepare_cpus+0xdd/0x766
[ 0.010000] kernel_init_freeable+0xc9/0x3a9
[ 0.010000] kernel_init+0x16/0x15c
[ 0.010000] ret_from_fork+0x2a/0x40
[ 0.010000]
[ 0.010000] Freed by task 0:
[ 0.010000] (stack is not available)
[ 0.010000]
[ 0.010000] The buggy address belongs to the object at ffff8800614ea000
[ 0.010000] which belongs to the cache kmalloc-32 of size 32
[ 0.010000] The buggy address is located 0 bytes inside of
[ 0.010000] 32-byte region [ffff8800614ea000, ffff8800614ea020)
[ 0.010000] The buggy address belongs to the page:
[ 0.010000] page:ffffea0001853a80 count:1 mapcount:0 mapping:ffff8800614ea000 index:0xffff8800614eafc1
[ 0.010000] flags: 0x100(slab)
[ 0.010000] raw: 0000000000000100 ffff8800614ea000 ffff8800614eafc1 000000010000003f
[ 0.010000] raw: ffffea0001852fa0 ffff880000080248 ffff8800000981c0 0000000000000000
[ 0.010000] page dumped because: kasan: bad access detected
[ 0.010000]
[ 0.010000] Memory state around the buggy address:
[ 0.010000] ffff8800614e9f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 0.010000] ffff8800614e9f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 0.010000] >ffff8800614ea000: 02 fc fc fc fc fc fc fc 00 fc fc fc fc fc fc fc
[ 0.010000] ^
[ 0.010000] ffff8800614ea080: 00 00 07 fc fc fc fc fc 00 00 03 fc fc fc fc fc
[ 0.010000] ffff8800614ea100: 00 05 fc fc fc fc fc fc 00 fc fc fc fc fc fc fc
[ 0.010000] ==================================================================
[ 0.010000] Disabling lock debugging due to kernel taint
[ 0.390208] KVM setup async PF for cpu 1
[ 0.391245] kvm-stealtime: cpu 1, msr 61e96640
[ 0.477011] #2
[ 0.010000] kvm-clock: cpu 2, msr 0:7544e081, secondary cpu clock
[ 0.010000] masked ExtINT on CPU#2
[ 0.480126] KVM setup async PF for cpu 2
[ 0.481171] kvm-stealtime: cpu 2, msr 61f16640
[ 0.567243] #3
[ 0.010000] kvm-clock: cpu 3, msr 0:7544e0c1, secondary cpu clock
[ 0.010000] masked ExtINT on CPU#3
[ 0.580189] KVM setup async PF for cpu 3
[ 0.580875] kvm-stealtime: cpu 3, msr 61f96640
[ 0.581666] smp: Brought up 1 node, 4 CPUs
[ 0.581666] ----------------
[ 0.581666] | NMI testsuite:
[ 0.581892] --------------------
[ 0.582498] remote IPI: ok |
[ 0.583395] local IPI: ok |
[ 0.584044] --------------------
[ 0.584651] Good, all 2 testcases passed! |
[ 0.585460] ---------------------------------
[ 0.586269] smpboot: Total of 4 processors activated (21548.06 BogoMIPS)
[ 0.591653] sched_clock: Marking stable (590000000, 0)->(1275641729, -685641729)
[ 0.595608] devtmpfs: initialized
[ 0.619788] workqueue: round-robin CPU selection forced, expect performance impact
[ 0.640549] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.642262] futex hash table entries: 1024 (order: 5, 131072 bytes)
[ 0.644448] prandom: seed boundary self test passed
[ 0.648684] prandom: 100 self tests passed
[ 0.649429] pinctrl core: initialized pinctrl subsystem
[ 0.653263] regulator-dummy: Failed to create debugfs directory
[ 0.657222] NET: Registered protocol family 16
[ 0.669167] cpuidle: using governor ladder
[ 0.670061] cpuidle: using governor menu
[ 0.677219] ACPI: bus type PCI registered
[ 0.677939] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
[ 0.679699] PCI: Using configuration type 1 for base access
[ 0.912144] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[ 0.915778] ACPI: Added _OSI(Module Device)
[ 0.916242] ACPI: Added _OSI(Processor Device)
[ 0.916724] ACPI: Added _OSI(3.0 _SCP Extensions)
[ 0.917366] ACPI: Added _OSI(Processor Aggregator Device)
[ 0.958057] ACPI: Interpreter enabled
[ 0.958616] ACPI: (supports S0 S5)
[ 0.959196] ACPI: Using IOAPIC for interrupt routing
[ 0.960350] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[ 1.124639] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[ 1.125358] acpi PNP0A03:00: _OSC: OS supports [Segments MSI]
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Xiaolong
View attachment "config-4.12.0-rc7-00079-g4b5ebf8" of type "text/plain" (109810 bytes)
View attachment "job-script" of type "text/plain" (4253 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (8072 bytes)
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