KASAN: use-after-free Read in disk_unblock_events

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: 47350a9f ANDROID: x86_64_cuttlefish_defconfig: Enable lz4 ..
git tree: android-4.14
console output: https://syzkaller.appspot.com/x/log.txt?x=13dbe492400000
kernel config: https://syzkaller.appspot.com/x/.config?x=10d236078f3378a3
dashboard link: https://syzkaller.appspot.com/bug?extid=ca99fa5675d32478afa4
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17fadc92400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1727727a400000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+ca99fa...@syzkaller.appspotmail.com

==================================================================
BUG: KASAN: use-after-free in disk_unblock_events+0x4b/0x50
block/genhd.c:1644
Read of size 8 at addr ffff8801bea4afe8 by task blkid/2915

CPU: 1 PID: 2915 Comm: blkid Not tainted 4.14.67+ #1
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0xb9/0x11b lib/dump_stack.c:53
print_address_description+0x60/0x22b mm/kasan/report.c:252
kasan_report_error mm/kasan/report.c:351 [inline]
kasan_report.cold.6+0x11b/0x2dd mm/kasan/report.c:409
disk_unblock_events+0x4b/0x50 block/genhd.c:1644
__blkdev_get+0x68f/0xe50 fs/block_dev.c:1548
blkdev_get+0x97/0x8c0 fs/block_dev.c:1604
blkdev_open+0x1bd/0x240 fs/block_dev.c:1762
do_dentry_open+0x426/0xda0 fs/open.c:764
vfs_open+0x11c/0x210 fs/open.c:878
do_last fs/namei.c:3408 [inline]
path_openat+0x4eb/0x23a0 fs/namei.c:3550
do_filp_open+0x197/0x270 fs/namei.c:3584
do_sys_open+0x2ef/0x580 fs/open.c:1071
do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7fa656a61120
RSP: 002b:00007ffce04aa0f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa656a61120
RDX: 00007ffce04abf34 RSI: 0000000000000000 RDI: 00007ffce04abf34
RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000bbf030
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005

Allocated by task 2907:
save_stack mm/kasan/kasan.c:447 [inline]
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc.part.1+0x4f/0xd0 mm/kasan/kasan.c:551
kmem_cache_alloc_trace+0x138/0x300 mm/slub.c:2750
kmem_cache_alloc_node_trace include/linux/slab.h:378 [inline]
kmalloc_node include/linux/slab.h:526 [inline]
kzalloc_node include/linux/slab.h:672 [inline]
alloc_disk_node+0x5f/0x3b0 block/genhd.c:1387
loop_add+0x3e9/0x840 drivers/block/loop.c:1827
loop_control_ioctl+0x12e/0x310 drivers/block/loop.c:1959
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:500 [inline]
do_vfs_ioctl+0x1a0/0x1030 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x7e/0xb0 fs/ioctl.c:692
do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
entry_SYSCALL_64_after_hwframe+0x42/0xb7

Freed by task 2915:
save_stack mm/kasan/kasan.c:447 [inline]
set_track mm/kasan/kasan.c:459 [inline]
kasan_slab_free+0xac/0x190 mm/kasan/kasan.c:524
slab_free_hook mm/slub.c:1389 [inline]
slab_free_freelist_hook mm/slub.c:1410 [inline]
slab_free mm/slub.c:2966 [inline]
kfree+0xf5/0x310 mm/slub.c:3897
device_release+0xf4/0x1a0 drivers/base/core.c:822
kobject_cleanup lib/kobject.c:646 [inline]
kobject_release lib/kobject.c:675 [inline]
kref_put include/linux/kref.h:70 [inline]
kobject_put+0x146/0x200 lib/kobject.c:692
put_disk+0x1f/0x30 block/genhd.c:1452
__blkdev_get+0x5fa/0xe50 fs/block_dev.c:1541
blkdev_get+0x97/0x8c0 fs/block_dev.c:1604
blkdev_open+0x1bd/0x240 fs/block_dev.c:1762
do_dentry_open+0x426/0xda0 fs/open.c:764
vfs_open+0x11c/0x210 fs/open.c:878
do_last fs/namei.c:3408 [inline]
path_openat+0x4eb/0x23a0 fs/namei.c:3550
do_filp_open+0x197/0x270 fs/namei.c:3584
do_sys_open+0x2ef/0x580 fs/open.c:1071
do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
entry_SYSCALL_64_after_hwframe+0x42/0xb7

The buggy address belongs to the object at ffff8801bea4aa80
which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 1384 bytes inside of
2048-byte region [ffff8801bea4aa80, ffff8801bea4b280)
The buggy address belongs to the page:
page:ffffea0006fa9200 count:1 mapcount:0 mapping: (null) index:0x0
compound_mapcount: 0
flags: 0x4000000000008100(slab|head)
raw: 4000000000008100 0000000000000000 0000000000000000 00000001000f000f
raw: dead000000000100 dead000000000200 ffff8801d6802800 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
ffff8801bea4ae80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8801bea4af00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
> ffff8801bea4af80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8801bea4b000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8801bea4b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================


---
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[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: 62872f95 Merge 4.4.174 into android-4.4
git tree: android-4.4
console output: https://syzkaller.appspot.com/x/log.txt?x=1216ffad200000
kernel config: https://syzkaller.appspot.com/x/.config?x=47bc4dd423780c4a
dashboard link: https://syzkaller.appspot.com/bug?extid=c77157a4eff0270621e7
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12529c93200000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=131dcc4d200000

IMPORTANT: if you fix the bug, please add the following tag to the commit:

Reported-by: syzbot+c77157...@syzkaller.appspotmail.com

==================================================================
BUG: KASAN: use-after-free in disk_unblock_events+0x55/0x60
block/genhd.c:1543
Read of size 8 at addr ffff8800b6ec6b68 by task syz-executor270/2108

CPU: 0 PID: 2108 Comm: syz-executor270 Not tainted 4.4.174+ #4
0000000000000000 5ab1c42842cfd0df ffff8801d4baf730 ffffffff81aad1a1
0000000000000000 ffffea0002dbb000 ffff8800b6ec6b68 0000000000000008
0000000000000000 ffff8801d4baf768 ffffffff81490120 0000000000000000
Call Trace:
[<ffffffff81aad1a1>] __dump_stack lib/dump_stack.c:15 [inline]
[<ffffffff81aad1a1>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
[<ffffffff81490120>] print_address_description+0x6f/0x21b
mm/kasan/report.c:252
[<ffffffff81490358>] kasan_report_error mm/kasan/report.c:351 [inline]
[<ffffffff81490358>] kasan_report mm/kasan/report.c:408 [inline]
[<ffffffff81490358>] kasan_report.cold+0x8c/0x2be mm/kasan/report.c:393
[<ffffffff81484ed4>] __asan_report_load8_noabort+0x14/0x20
mm/kasan/report.c:429
[<ffffffff81a82965>] disk_unblock_events+0x55/0x60 block/genhd.c:1543
[<ffffffff8154efcc>] __blkdev_get+0x70c/0xdf0 fs/block_dev.c:1297
[<ffffffff81551938>] blkdev_get+0x2e8/0x920 fs/block_dev.c:1353
[<ffffffff8155219a>] blkdev_open+0x1aa/0x250 fs/block_dev.c:1508
[<ffffffff8149154f>] do_dentry_open+0x38f/0xbd0 fs/open.c:749
[<ffffffff81494d3b>] vfs_open+0x10b/0x210 fs/open.c:862
[<ffffffff814c5ddf>] do_last fs/namei.c:3269 [inline]
[<ffffffff814c5ddf>] path_openat+0x136f/0x4470 fs/namei.c:3406
[<ffffffff814ccab1>] do_filp_open+0x1a1/0x270 fs/namei.c:3440
[<ffffffff81495668>] do_sys_open+0x2f8/0x600 fs/open.c:1038
[<ffffffff8149599d>] SYSC_open fs/open.c:1056 [inline]
[<ffffffff8149599d>] SyS_open+0x2d/0x40 fs/open.c:1051
[<ffffffff82718ba1>] entry_SYSCALL_64_fastpath+0x1e/0x9a

Allocated by task 2108:
[<ffffffff8102e3c6>] save_stack_trace+0x26/0x50
arch/x86/kernel/stacktrace.c:63
[<ffffffff81483f22>] save_stack mm/kasan/kasan.c:512 [inline]
[<ffffffff81483f22>] set_track mm/kasan/kasan.c:524 [inline]
[<ffffffff81483f22>] kasan_kmalloc.part.0+0x62/0xf0 mm/kasan/kasan.c:616
[<ffffffff81484197>] kasan_kmalloc+0xb7/0xd0 mm/kasan/kasan.c:601
[<ffffffff814801a3>] kmem_cache_alloc_trace+0x123/0x2d0 mm/slub.c:2642
[<ffffffff81a81b50>] kmem_cache_alloc_node_trace include/linux/slab.h:367
[inline]
[<ffffffff81a81b50>] kmalloc_node include/linux/slab.h:514 [inline]
[<ffffffff81a81b50>] kzalloc_node include/linux/slab.h:631 [inline]
[<ffffffff81a81b50>] alloc_disk_node+0x50/0x3c0 block/genhd.c:1282
[<ffffffff81a81edb>] alloc_disk+0x1b/0x20 block/genhd.c:1274
[<ffffffff81d436d0>] loop_add+0x380/0x830 drivers/block/loop.c:1857
[<ffffffff81d440a8>] loop_control_ioctl+0x138/0x2f0
drivers/block/loop.c:1988
[<ffffffff814d23f7>] vfs_ioctl fs/ioctl.c:43 [inline]
[<ffffffff814d23f7>] file_ioctl fs/ioctl.c:470 [inline]
[<ffffffff814d23f7>] do_vfs_ioctl+0x6e7/0xfa0 fs/ioctl.c:605
[<ffffffff814d2d3f>] SYSC_ioctl fs/ioctl.c:622 [inline]
[<ffffffff814d2d3f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:613
[<ffffffff82718ba1>] entry_SYSCALL_64_fastpath+0x1e/0x9a

Freed by task 2108:
[<ffffffff8102e3c6>] save_stack_trace+0x26/0x50
arch/x86/kernel/stacktrace.c:63
[<ffffffff81484820>] save_stack mm/kasan/kasan.c:512 [inline]
[<ffffffff81484820>] set_track mm/kasan/kasan.c:524 [inline]
[<ffffffff81484820>] kasan_slab_free+0xb0/0x190 mm/kasan/kasan.c:589
[<ffffffff81481c44>] slab_free_hook mm/slub.c:1383 [inline]
[<ffffffff81481c44>] slab_free_freelist_hook mm/slub.c:1405 [inline]
[<ffffffff81481c44>] slab_free mm/slub.c:2859 [inline]
[<ffffffff81481c44>] kfree+0xf4/0x310 mm/slub.c:3749
[<ffffffff81a80375>] disk_release+0x255/0x330 block/genhd.c:1118
[<ffffffff81cf785d>] device_release+0x7d/0x220 drivers/base/core.c:247
[<ffffffff81ab309c>] kobject_cleanup lib/kobject.c:643 [inline]
[<ffffffff81ab309c>] kobject_release lib/kobject.c:672 [inline]
[<ffffffff81ab309c>] kref_sub include/linux/kref.h:73 [inline]
[<ffffffff81ab309c>] kref_put include/linux/kref.h:98 [inline]
[<ffffffff81ab309c>] kobject_put+0x14c/0x260 lib/kobject.c:689
[<ffffffff81a7e013>] put_disk+0x23/0x30 block/genhd.c:1346
[<ffffffff8154ef2c>] __blkdev_get+0x66c/0xdf0 fs/block_dev.c:1290
[<ffffffff81551938>] blkdev_get+0x2e8/0x920 fs/block_dev.c:1353
[<ffffffff8155219a>] blkdev_open+0x1aa/0x250 fs/block_dev.c:1508
[<ffffffff8149154f>] do_dentry_open+0x38f/0xbd0 fs/open.c:749
[<ffffffff81494d3b>] vfs_open+0x10b/0x210 fs/open.c:862
[<ffffffff814c5ddf>] do_last fs/namei.c:3269 [inline]
[<ffffffff814c5ddf>] path_openat+0x136f/0x4470 fs/namei.c:3406
[<ffffffff814ccab1>] do_filp_open+0x1a1/0x270 fs/namei.c:3440
[<ffffffff81495668>] do_sys_open+0x2f8/0x600 fs/open.c:1038
[<ffffffff8149599d>] SYSC_open fs/open.c:1056 [inline]
[<ffffffff8149599d>] SyS_open+0x2d/0x40 fs/open.c:1051
[<ffffffff82718ba1>] entry_SYSCALL_64_fastpath+0x1e/0x9a

The buggy address belongs to the object at ffff8800b6ec6600

which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 1384 bytes inside of

2048-byte region [ffff8800b6ec6600, ffff8800b6ec6e00)

The buggy address belongs to the page:

Initializing cgroup subsys cpu
Initializing cgroup subsys cpuacct
Linux version 4.4.174+ (syzkaller@ci) (gcc version 9.0.0 20181231
(experimental) (GCC) ) #4 SMP PREEMPT Fri Feb 8 11:15:16 UTC 2019
Command line: BOOT_IMAGE=/vmlinuz root=/dev/sda1 console=ttyS0
earlyprintk=serial vsyscall=native rodata=n oops=panic panic_on_warn=1
nmi_watchdog=panic panic=86400 workqueue.watchdog_thresh=140 nopti
KERNEL supported cpus:
Intel GenuineIntel
AMD AuthenticAMD
x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
x86/fpu: Supporting XSAVE feature 0x01: 'x87 floating point registers'
x86/fpu: Supporting XSAVE feature 0x02: 'SSE registers'
x86/fpu: Supporting XSAVE feature 0x04: 'AVX registers'
x86/fpu: Enabled xstate features 0x7, context size is 832 bytes,
using 'standard' format.
e820: BIOS-provided physical RAM map:
BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
BIOS-e820: [mem 0x0000000000100000-0x00000000bfffcfff] usable
BIOS-e820: [mem 0x00000000bfffd000-0x00000000bfffffff] reserved
BIOS-e820: [mem 0x00000000fffbc000-0x00000000ffffffff] reserved
BIOS-e820: [mem 0x0000000100000000-0x000000021fffffff] usable
bootconsole [earlyser0] enabled
NX (Execute Disable) protection: active
Hypervisor detected: KVM
Kernel/User page tables isolation: disabled
e820: last_pfn = 0x220000 max_arch_pfn = 0x400000000
x86/PAT: Configuration [0-7]: WB WC UC- UC UC UC UC UC
e820: last_pfn = 0xbfffd max_arch_pfn = 0x400000000
found SMP MP-table at [mem 0x000f2c70-0x000f2c7f] mapped at
[ffff8800000f2c70]
Using GB pages for direct mapping
ACPI: Early table checksum verification disabled
ACPI: RSDP 0x00000000000F2A00 000014 (v00 Google)
ACPI: RSDT 0x00000000BFFFDA50 000038 (v01 Google GOOGRSDT 00000001 GOOG
00000001)
ACPI: FACP 0x00000000BFFFFF00 0000F4 (v02 Google GOOGFACP 00000001 GOOG
00000001)
ACPI: DSDT 0x00000000BFFFDA90 0018BA (v01 Google GOOGDSDT 00000001 GOOG
00000001)
ACPI: FACS 0x00000000BFFFFEC0 000040
ACPI: FACS 0x00000000BFFFFEC0 000040
ACPI: SSDT 0x00000000BFFFF540 000980 (v01 Google GOOGSSDT 00000001 GOOG
00000001)
ACPI: APIC 0x00000000BFFFF450 000076 (v01 Google GOOGAPIC 00000001 GOOG
00000001)
ACPI: WAET 0x00000000BFFFF420 000028 (v01 Google GOOGWAET 00000001 GOOG
00000001)
ACPI: SRAT 0x00000000BFFFF350 0000C8 (v01 Google GOOGSRAT 00000001 GOOG
00000001)
kvm-clock: Using msrs 4b564d01 and 4b564d00
kvm-clock: cpu 0, msr 2:1fffd001, primary cpu clock
kvm-clock: using sched offset of 1870817926 cycles
clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb,
max_idle_ns: 881590591483 ns
Zone ranges:
DMA32 [mem 0x0000000000001000-0x00000000ffffffff]
Normal [mem 0x0000000100000000-0x000000021fffffff]
Movable zone start for each node
Early memory node ranges
node 0: [mem 0x0000000000001000-0x000000000009efff]
node 0: [mem 0x0000000000100000-0x00000000bfffcfff]
node 0: [mem 0x0000000100000000-0x000000021fffffff]
Initmem setup node 0 [mem 0x0000000000001000-0x000000021fffffff]
kasan: KernelAddressSanitizer initialized
ACPI: PM-Timer IO Port: 0xb008
ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
Using ACPI (MADT) for SMP configuration information
smpboot: Allowing 2 CPUs, 0 hotplug CPUs
e820: [mem 0xc0000000-0xfffbbfff] available for PCI devices
Booting paravirtualized kernel on KVM
clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff,
max_idle_ns: 19112604462750000 ns
setup_percpu: NR_CPUS:8 nr_cpumask_bits:8 nr_cpu_ids:2 nr_node_ids:1
PERCPU: Embedded 41 pages/cpu @ffff8801db600000 s130696 r8192 d29048
u1048576
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 1935238
Kernel command line: BOOT_IMAGE=/vmlinuz root=/dev/sda1 console=ttyS0
earlyprintk=serial vsyscall=native rodata=n oops=panic panic_on_warn=1
nmi_watchdog=panic panic=86400 workqueue.watchdog_thresh=140 nopti
PID hash table entries: 4096 (order: 3, 32768 bytes)
Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes)
Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes)
Memory: 6609392K/7863916K available (23671K kernel code, 3786K rwdata,
5144K rodata, 1320K init, 23156K bss, 1254524K reserved, 0K cma-reserved)
SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
Running RCU self tests
Preemptible hierarchical RCU implementation.
RCU lockdep checking is enabled.
Build-time adjustment of leaf fanout to 64.
RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2.
RCU: Adjusting geometry for rcu_fanout_leaf=64, nr_cpu_ids=2
NR_IRQS:4352 nr_irqs:440 16
console [ttyS0] enabled
console [ttyS0] enabled
bootconsole [earlyser0] disabled
bootconsole [earlyser0] disabled
Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
... MAX_LOCKDEP_SUBCLASSES: 8
... MAX_LOCK_DEPTH: 48
... MAX_LOCKDEP_KEYS: 8191
... CLASSHASH_SIZE: 4096
... MAX_LOCKDEP_ENTRIES: 32768
... MAX_LOCKDEP_CHAINS: 65536
... CHAINHASH_SIZE: 32768
memory used by lock dependency info: 8159 kB
per task-struct memory footprint: 1920 bytes
tsc: Detected 2299.998 MHz processor
Calibrating delay loop (skipped) preset value.. 4599.99 BogoMIPS
(lpj=22999980)
pid_max: default: 32768 minimum: 301
ACPI: Core revision 20150930
ACPI: 2 ACPI AML tables successfully acquired and loaded
Security Framework initialized
SELinux: Initializing.
Mount-cache hash table entries: 16384 (order: 5, 131072 bytes)
Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes)
Initializing cgroup subsys freezer
CPU: Physical Processor ID: 0
Last level iTLB entries: 4KB 1024, 2MB 1024, 4MB 1024
Last level dTLB entries: 4KB 1024, 2MB 1024, 4MB 1024, 1GB 4
Spectre V2 : Mitigation: Full generic retpoline
Spectre V2 : Spectre v2 / SpectreRSB mitigation: Filling RSB on context
switch
Speculative Store Bypass: Vulnerable
Freeing SMP alternatives memory: 28K
..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1
smpboot: CPU0: Intel(R) Xeon(R) CPU @ 2.30GHz (family: 0x6, model: 0x3f,
stepping: 0x0)
Performance Events: unsupported p6 CPU model 63 no PMU driver, software
events only.
x86: Booting SMP configuration:
.... node #0, CPUs: #1
kvm-clock: cpu 1, msr 2:1fffd041, secondary cpu clock
x86: Booted up 1 node, 2 CPUs
smpboot: Total of 2 processors activated (9199.99 BogoMIPS)
CPU1: update max cpu_capacity 1024
CPU0: update max cpu_capacity 1024
devtmpfs: initialized
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns:
19112604462750000 ns
futex hash table entries: 512 (order: 4, 65536 bytes)
NET: Registered protocol family 16
cpuidle: using governor ladder
cpuidle: using governor menu
ACPI: bus type PCI registered
PCI: Using configuration type 1 for base access
ACPI: Added _OSI(Module Device)
ACPI: Added _OSI(Processor Device)
ACPI: Added _OSI(3.0 _SCP Extensions)
ACPI: Added _OSI(Processor Aggregator Device)
ACPI: Executed 2 blocks of module-level executable AML code
ACPI: Interpreter enabled
ACPI: (supports S0 S3 S5)
ACPI: Using IOAPIC for interrupt routing
PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and
report a bug
ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
acpi PNP0A03:00: _OSC: OS supports [Segments MSI]
acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM
PCI host bridge to bus 0000:00
pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7 window]
pci_bus 0000:00: root bus resource [io 0x0d00-0xffff window]
pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
pci_bus 0000:00: root bus resource [mem 0xc0000000-0xfebfffff window]
pci_bus 0000:00: root bus resource [bus 00-ff]
pci 0000:00:01.3: quirk: [io 0xb000-0xb03f] claimed by PIIX4 ACPI
ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11)
ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11)
ACPI: PCI Interrupt Link [LNKS] (IRQs *9)
ACPI: Enabled 16 GPEs in block 00 to 0F
vgaarb: loaded
SCSI subsystem initialized
ACPI: bus type USB registered
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
Advanced Linux Sound Architecture Driver Initialized.
PCI: Using ACPI for IRQ routing
amd_nb: Cannot enumerate AMD northbridges
clocksource: Switched to clocksource kvm-clock
pnp: PnP ACPI init
pnp: PnP ACPI: found 7 devices
clocksource: acpi_pm: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns:
2085701024 ns
NET: Registered protocol family 2
TCP established hash table entries: 65536 (order: 7, 524288 bytes)
TCP bind hash table entries: 65536 (order: 10, 4194304 bytes)
TCP: Hash tables configured (established 65536 bind 65536)
UDP hash table entries: 4096 (order: 7, 655360 bytes)
UDP-Lite hash table entries: 4096 (order: 7, 655360 bytes)
NET: Registered protocol family 1
pci 0000:00:00.0: Limiting direct PCI/PCI transfers
PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
software IO TLB: mapped [mem 0xbbffd000-0xbfffd000] (64MB)
RAPL PMU detected, API unit is 2^-32 Joules, 3 fixed counters 10737418240
ms ovfl timer
hw unit of domain pp0-core 2^-0 Joules
hw unit of domain package 2^-0 Joules
hw unit of domain dram 2^-16 Joules
audit: initializing netlink subsys (disabled)
audit: type=2000 audit(1552573945.411:1): initialized
VFS: Disk quotas dquot_6.6.0
VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
Registering sdcardfs 0.1
fuse init (API version 7.23)
cryptomgr_test (31) used greatest stack depth: 28720 bytes left
Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253)
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
ACPI: Power Button [PWRF]
input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
ACPI: Sleep Button [SLPF]
Warning: Processor Platform Limit event detected, but not handled.
Consider compiling CPUfreq support into your kernel.
ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 11
virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 10
virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
brd: module loaded
loop: module loaded
scsi host0: Virtio SCSI HBA
scsi 0:0:1:0: Direct-Access Google PersistentDisk 1 PQ: 0 ANSI: 6
tsc: Refined TSC clocksource calibration: 2300.014 MHz
clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x2127428d09e,
max_idle_ns: 440795284093 ns
sd 0:0:1:0: [sda] 4194304 512-byte logical blocks: (2.15 GB/2.00 GiB)
tun: Universal TUN/TAP device driver, 1.6
tun: (C) 1999-2004 Max Krasnyansky <ma...@qualcomm.com>
sd 0:0:1:0: [sda] 4096-byte physical blocks
sd 0:0:1:0: [sda] Write Protect is off
sd 0:0:1:0: [sda] Write cache: enabled, read cache: enabled, doesn't
support DPO or FUA
e1000: Intel(R) PRO/1000 Network Driver - version 7.3.21-k8-NAPI
e1000: Copyright (c) 1999-2006 Intel Corporation.
sda: sda1
PPP generic driver version 2.4.2
PPP BSD Compression module registered
PPP Deflate Compression module registered
PPP MPPE Compression module registered
NET: Registered protocol family 24
usbcore: registered new interface driver asix
usbcore: registered new interface driver ax88179_178a
usbcore: registered new interface driver cdc_ether
sd 0:0:1:0: [sda] Attached SCSI disk
usbcore: registered new interface driver net1080
usbcore: registered new interface driver cdc_subset
usbcore: registered new interface driver zaurus
usbcore: registered new interface driver cdc_ncm
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ehci-pci: EHCI PCI platform driver
i8042: PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12
i8042: Warning: Keylock active
serio: i8042 KBD port at 0x60,0x64 irq 1
serio: i8042 AUX port at 0x60,0x64 irq 12
mousedev: PS/2 mouse device common for all mice
usbcore: registered new interface driver xpad
usbcore: registered new interface driver usb_acecad
usbcore: registered new interface driver aiptek
usbcore: registered new interface driver gtco
usbcore: registered new interface driver hanwang
usbcore: registered new interface driver kbtab
rtc_cmos 00:00: RTC can wake from S4
rtc_cmos 00:00: rtc core: registered rtc_cmos as rtc0
rtc_cmos 00:00: alarms up to one day, 114 bytes nvram
device-mapper: uevent: version 1.0.3
device-mapper: ioctl: 4.34.0-ioctl (2015-10-28) initialised:
dm-d...@redhat.com
hidraw: raw HID events driver (C) Jiri Kosina
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
ashmem: initialized
u32 classifier
Actions configured
Netfilter messages via NETLINK v0.30.
nf_conntrack version 0.5.0 (65536 buckets, 262144 max)
ctnetlink v0.93: registering with nfnetlink.
xt_time: kernel timezone is -0000
IPv4 over IPsec tunneling driver
ip_tables: (C) 2000-2006 Netfilter Core Team
arp_tables: (C) 2002 David S. Miller
Initializing XFRM netlink socket
NET: Registered protocol family 10
mip6: Mobile IPv6
ip6_tables: (C) 2000-2006 Netfilter Core Team
sit: IPv6 over IPv4 tunneling driver
NET: Registered protocol family 17
NET: Registered protocol family 15
registered taskstats version 1
rtc_cmos 00:00: setting system clock to 2019-03-14 14:32:26 UTC (1552573946)
ALSA device list:
No soundcards found.
input: AT Translated Set 2 keyboard as
/devices/platform/i8042/serio0/input/input2
EXT4-fs (sda1): couldn't mount as ext3 due to feature incompatibilities
EXT4-fs (sda1): couldn't mount as ext2 due to feature incompatibilities
EXT4-fs (sda1): mounted filesystem without journal. Opts: (null)
VFS: Mounted root (ext4 filesystem) readonly on device 8:1.
devtmpfs: mounted
Freeing unused kernel memory: 1320K
Kernel memory protection disabled.
SELinux: Permission module_load in class system not defined in policy.
SELinux: Class netlink_iscsi_socket not defined in policy.
SELinux: Class netlink_fib_lookup_socket not defined in policy.
SELinux: Class netlink_connector_socket not defined in policy.
SELinux: Class netlink_netfilter_socket not defined in policy.
SELinux: Class netlink_generic_socket not defined in policy.
SELinux: Class netlink_scsitransport_socket not defined in policy.
SELinux: Class netlink_rdma_socket not defined in policy.
SELinux: Class netlink_crypto_socket not defined in policy.
SELinux: Permission wake_alarm in class capability2 not defined in policy.
SELinux: Permission block_suspend in class capability2 not defined in
policy.
SELinux: Permission audit_read in class capability2 not defined in policy.
SELinux: Permission attach_queue in class tun_socket not defined in policy.
SELinux: Class binder not defined in policy.
SELinux: the above unknown classes and permissions will be denied
audit: type=1403 audit(1552573947.830:2): policy loaded auid=4294967295
ses=4294967295
stty (356) used greatest stack depth: 26176 bytes left
ps (451) used greatest stack depth: 25968 bytes left
audit: type=1400 audit(1552573949.260:3): avc: denied { associate } for
pid=460 comm="restorecon" name="pts" dev="devtmpfs" ino=4439
scontext=system_u:object_r:devpts_t:s0
tcontext=system_u:object_r:device_t:s0 tclass=filesystem permissive=1