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Date: Sun, 2 Aug 2020 13:48:52 +0800
From: kernel test robot <lkp@...el.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
LKML <linux-kernel@...r.kernel.org>,
linux-serial@...r.kernel.org, lkp@...ts.01.org
Subject: [serial] 679193b7ba: BUG:spinlock_bad_magic_on_CPU
Greeting,
FYI, we noticed the following commit (built with gcc-9):
commit: 679193b7baf8d88e41cbeb397ca17f797654947d ("serial: 8250: Let serial core initialise spin lock")
https://git.kernel.org/cgit/linux/kernel/git/gregkh/tty.git tty-next
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-------------------------------+------------+------------+
| | f3af1b68fc | 679193b7ba |
+-------------------------------+------------+------------+
| boot_successes | 4 | 0 |
| boot_failures | 0 | 4 |
| BUG:spinlock_bad_magic_on_CPU | 0 | 4 |
+-------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <lkp@...el.com>
[ 0.679698] BUG: spinlock bad magic on CPU#0, swapper/0/0
[ 0.681031] lock: serial8250_ports+0x0/0x7000, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0
[ 0.683364] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.8.0-rc7-00089-g679193b7baf8d8 #3
[ 0.685316] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 0.687206] Call Trace:
[ 0.687933] dump_stack+0x96/0xd0
[ 0.688733] do_raw_spin_lock+0x72/0xc0
[ 0.689738] _raw_spin_lock_irqsave+0x4f/0x60
[ 0.690833] ? serial8250_do_set_termios+0x118/0x460
[ 0.692034] serial8250_do_set_termios+0x118/0x460
[ 0.693193] uart_set_options+0x100/0x150
[ 0.694237] serial8250_console_setup+0x96/0x1a0
[ 0.695386] univ8250_console_setup+0x52/0x80
[ 0.696495] try_enable_new_console+0x82/0xf0
[ 0.697591] ? serial8250_isa_init_ports+0x1c6/0x1c6
[ 0.698930] register_console+0xcd/0x280
[ 0.700069] ? serial8250_isa_init_ports+0x1c6/0x1c6
[ 0.701412] univ8250_console_init+0x24/0x27
[ 0.702561] console_init+0x1ae/0x282
[ 0.703500] start_kernel+0x4ff/0x664
[ 0.704489] secondary_startup_64+0xb6/0xc0
[ 0.705556] printk: console [ttyS0] enabled
[ 0.707307] printk: bootconsole [earlyser0] disabled
[ 0.709464] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
[ 0.711666] ... MAX_LOCKDEP_SUBCLASSES: 8
[ 0.712856] ... MAX_LOCK_DEPTH: 48
[ 0.714080] ... MAX_LOCKDEP_KEYS: 8192
[ 0.715318] ... CLASSHASH_SIZE: 4096
[ 0.716572] ... MAX_LOCKDEP_ENTRIES: 32768
[ 0.717837] ... MAX_LOCKDEP_CHAINS: 65536
[ 0.718990] ... CHAINHASH_SIZE: 32768
[ 0.720066] memory used by lock dependency info: 6301 kB
[ 0.721338] memory used for stack traces: 4224 kB
[ 0.722656] per task-struct memory footprint: 1920 bytes
[ 0.724175] ACPI: Core revision 20200528
[ 0.725601] clocksource: hpet: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604467 ns
[ 0.728055] APIC: Switch to symmetric I/O mode setup
[ 0.729759] x2apic enabled
[ 0.731093] Switched APIC routing to physical x2apic.
[ 0.732576] masked ExtINT on CPU#0
[ 0.734651] ENABLING IO-APIC IRQs
[ 0.735607] init IO_APIC IRQs
[ 0.736571] apic 0 pin 0 not connected
[ 0.737760] IOAPIC[0]: Set routing entry (0-1 -> 0xef -> IRQ 1 Mode:0 Active:0 Dest:0)
[ 0.739964] IOAPIC[0]: Set routing entry (0-2 -> 0x30 -> IRQ 0 Mode:0 Active:0 Dest:0)
[ 0.742292] IOAPIC[0]: Set routing entry (0-3 -> 0xef -> IRQ 3 Mode:0 Active:0 Dest:0)
[ 0.744585] IOAPIC[0]: Set routing entry (0-4 -> 0xef -> IRQ 4 Mode:0 Active:0 Dest:0)
[ 0.746724] IOAPIC[0]: Set routing entry (0-5 -> 0xef -> IRQ 5 Mode:1 Active:0 Dest:0)
[ 0.748769] IOAPIC[0]: Set routing entry (0-6 -> 0xef -> IRQ 6 Mode:0 Active:0 Dest:0)
[ 0.751063] IOAPIC[0]: Set routing entry (0-7 -> 0xef -> IRQ 7 Mode:0 Active:0 Dest:0)
[ 0.753411] IOAPIC[0]: Set routing entry (0-8 -> 0xef -> IRQ 8 Mode:0 Active:0 Dest:0)
[ 0.755576] IOAPIC[0]: Set routing entry (0-9 -> 0xef -> IRQ 9 Mode:1 Active:0 Dest:0)
[ 0.757708] IOAPIC[0]: Set routing entry (0-10 -> 0xef -> IRQ 10 Mode:1 Active:0 Dest:0)
[ 0.759917] IOAPIC[0]: Set routing entry (0-11 -> 0xef -> IRQ 11 Mode:1 Active:0 Dest:0)
[ 0.762093] IOAPIC[0]: Set routing entry (0-12 -> 0xef -> IRQ 12 Mode:0 Active:0 Dest:0)
[ 0.764270] IOAPIC[0]: Set routing entry (0-13 -> 0xef -> IRQ 13 Mode:0 Active:0 Dest:0)
[ 0.766476] IOAPIC[0]: Set routing entry (0-14 -> 0xef -> IRQ 14 Mode:0 Active:0 Dest:0)
[ 0.768578] IOAPIC[0]: Set routing entry (0-15 -> 0xef -> IRQ 15 Mode:0 Active:0 Dest:0)
[ 0.770698] apic 0 pin 16 not connected
[ 0.771728] apic 0 pin 17 not connected
[ 0.772763] apic 0 pin 18 not connected
[ 0.773840] apic 0 pin 19 not connected
[ 0.774908] apic 0 pin 20 not connected
[ 0.775848] apic 0 pin 21 not connected
[ 0.776812] apic 0 pin 22 not connected
[ 0.777830] apic 0 pin 23 not connected
[ 0.779059] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[ 0.780458] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x29b38900952, max_idle_ns: 440795323692 ns
[ 0.782965] Calibrating delay loop (skipped) preset value.. 5786.05 BogoMIPS (lpj=2893028)
[ 0.783967] pid_max: default: 32768 minimum: 301
[ 0.785033] LSM: Security Framework initializing
[ 0.785973] Yama: becoming mindful.
[ 0.787068] Mount-cache hash table entries: 32768 (order: 6, 262144 bytes, linear)
[ 0.789000] Mountpoint-cache hash table entries: 32768 (order: 6, 262144 bytes, linear)
Poking KASLR using RDTSC...
[ 0.791631] Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0
[ 0.791974] Last level dTLB entries: 4KB 0, 2MB 0, 4MB 0, 1GB 0
[ 0.792976] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
[ 0.794976] Spectre V2 : Mitigation: Full generic retpoline
[ 0.795964] Spectre V2 : Spectre v2 / SpectreRSB mitigation: Filling RSB on context switch
[ 0.796967] Speculative Store Bypass: Vulnerable
[ 0.797974] MDS: Vulnerable: Clear CPU buffers attempted, no microcode
[ 0.800025] Freeing SMP alternatives memory: 40K
[ 0.802607] smpboot: CPU0: Intel Xeon E312xx (Sandy Bridge) (family: 0x6, model: 0x2a, stepping: 0x1)
[ 0.803397] Performance Events: unsupported p6 CPU model 42 no PMU driver, software events only.
[ 0.804132] rcu: Hierarchical SRCU implementation.
[ 0.806152] NMI watchdog: Perf NMI watchdog permanently disabled
[ 0.807192] smp: Bringing up secondary CPUs ...
[ 0.808338] x86: Booting SMP configuration:
[ 0.808982] .... node #0, CPUs: #1
[ 0.217301] kvm-clock: cpu 1, msr 27da01041, secondary cpu clock
[ 0.217301] masked ExtINT on CPU#1
[ 0.217301] smpboot: CPU 1 Converting physical 0 to logical die 1
[ 0.831177] KVM setup async PF for cpu 1
[ 0.831958] kvm-stealtime: cpu 1, msr 42fd30080
[ 0.832082] smp: Brought up 1 node, 2 CPUs
[ 0.832994] smpboot: Max logical packages: 2
[ 0.833975] smpboot: Total of 2 processors activated (11572.11 BogoMIPS)
[ 0.878607] node 0 deferred pages initialised in 43ms
[ 0.880661] devtmpfs: initialized
[ 0.881135] x86/mm: Memory block size: 128MB
To reproduce:
# build kernel
cd linux
cp config-5.8.0-rc7-00089-g679193b7baf8d8 .config
make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage
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,
lkp
View attachment "config-5.8.0-rc7-00089-g679193b7baf8d8" of type "text/plain" (209046 bytes)
View attachment "job-script" of type "text/plain" (4686 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (15656 bytes)
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