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KASAN: use-after-free Read in snd_timer_interrupt

Status: auto-closed as invalid on 2019/03/29 03:33
First crash: 2006d, last: 2006d
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: use-after-free Read in snd_timer_interrupt sound syz 1 2387d 2344d 0/26 closed as invalid on 2017/10/27 08:15
android-414 KASAN: use-after-free Read in snd_timer_interrupt 1 1595d 1595d 0/1 auto-closed as invalid on 2020/03/14 16:44
android-49 KASAN: use-after-free Read in snd_timer_interrupt syz 2 2131d 1810d 0/3 public: reported syz repro on 2019/04/14 09:28

Sample crash report:
==================================================================
BUG: KASAN: use-after-free in __list_del_entry_valid+0x141/0x1a0 lib/list_debug.c:42
Read of size 8 at addr ffff8800b697e098 by task syz-executor5/2107

CPU: 1 PID: 2107 Comm: syz-executor5 Not tainted 4.4.159+ #42
 0000000000000000 cd08c0a814e0a62e ffff8801db707b60 ffffffff81a9949d
 ffffea0002da5f80 ffff8800b697e098 0000000000000000 ffff8800b697e098
 ffff8800b697e090 ffff8801db707b98 ffffffff8148a809 ffff8800b697e098
Call Trace:
 <IRQ>  [<ffffffff81a9949d>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ>  [<ffffffff81a9949d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff8148a809>] print_address_description+0x6c/0x217 mm/kasan/report.c:252
 [<ffffffff8148ab29>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff8148ab29>] kasan_report.cold.6+0x175/0x2f7 mm/kasan/report.c:408
 [<ffffffff8147f7a4>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff81af78e1>] __list_del_entry_valid+0x141/0x1a0 lib/list_debug.c:42
 [<ffffffff82171eea>] __list_del_entry include/linux/list.h:116 [inline]
 [<ffffffff82171eea>] list_del_init include/linux/list.h:158 [inline]
 [<ffffffff82171eea>] snd_timer_interrupt+0x55a/0xee0 sound/core/timer.c:788
 [<ffffffff8217292d>] snd_timer_s_function+0xbd/0x130 sound/core/timer.c:1035
 [<ffffffff812555dc>] call_timer_fn+0x18c/0x870 kernel/time/timer.c:1185
 [<ffffffff812562c5>] __run_timers kernel/time/timer.c:1261 [inline]
 [<ffffffff812562c5>] run_timer_softirq+0x605/0xbb0 kernel/time/timer.c:1444
 [<ffffffff82708b9c>] __do_softirq+0x22c/0xa1a kernel/softirq.c:273
 [<ffffffff810e1fdd>] invoke_softirq kernel/softirq.c:350 [inline]
 [<ffffffff810e1fdd>] irq_exit+0x10d/0x140 kernel/softirq.c:391
 [<ffffffff82708301>] exiting_irq arch/x86/include/asm/apic.h:652 [inline]
 [<ffffffff82708301>] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:926
 [<ffffffff8270765d>] apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:741
 <EOI>  [<ffffffff8101381e>] ? print_context_stack+0x4e/0xe0 arch/x86/kernel/dumpstack.c:107
 [<ffffffff81012eaa>] dump_trace+0x17a/0x360 arch/x86/kernel/dumpstack_64.c:243
 [<ffffffff8102e6b6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff8147e7e2>] save_stack mm/kasan/kasan.c:512 [inline]
 [<ffffffff8147e7e2>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff8147e7e2>] kasan_kmalloc.part.1+0x62/0xf0 mm/kasan/kasan.c:616
 [<ffffffff8147ea5f>] kasan_kmalloc+0xaf/0xc0 mm/kasan/kasan.c:601
 [<ffffffff8147f022>] kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:554
 [<ffffffff8147ad6b>] slab_post_alloc_hook mm/slub.c:1349 [inline]
 [<ffffffff8147ad6b>] slab_alloc_node mm/slub.c:2615 [inline]
 [<ffffffff8147ad6b>] slab_alloc mm/slub.c:2623 [inline]
 [<ffffffff8147ad6b>] __kmalloc+0xfb/0x330 mm/slub.c:3609
 [<ffffffff8145aa6f>] __kmalloc_node include/linux/slab.h:345 [inline]
 [<ffffffff8145aa6f>] kmalloc_node include/linux/slab.h:518 [inline]
 [<ffffffff8145aa6f>] __vmalloc_area_node mm/vmalloc.c:1599 [inline]
 [<ffffffff8145aa6f>] __vmalloc_node_range+0x18f/0x630 mm/vmalloc.c:1672
 [<ffffffff8145b3fb>] __vmalloc_node mm/vmalloc.c:1716 [inline]
 [<ffffffff8145b3fb>] __vmalloc_node_flags mm/vmalloc.c:1730 [inline]
 [<ffffffff8145b3fb>] vmalloc+0x5b/0x70 mm/vmalloc.c:1745
 [<ffffffff8235987e>] xt_compat_add_offset+0x21e/0x370 net/netfilter/x_tables.c:503
 [<ffffffff8267ad9e>] check_compat_entry_size_and_hooks net/ipv6/netfilter/ip6_tables.c:1522 [inline]
 [<ffffffff8267ad9e>] translate_compat_table+0xb9e/0x1870 net/ipv6/netfilter/ip6_tables.c:1599
 [<ffffffff8267bcda>] compat_do_replace.isra.10+0x26a/0x400 net/ipv6/netfilter/ip6_tables.c:1701
 [<ffffffff8267bf72>] compat_do_ip6t_set_ctl+0x102/0x140 net/ipv6/netfilter/ip6_tables.c:1732
 [<ffffffff822e952b>] compat_nf_sockopt net/netfilter/nf_sockopt.c:143 [inline]
 [<ffffffff822e952b>] compat_nf_setsockopt+0x8b/0x130 net/netfilter/nf_sockopt.c:155
 [<ffffffff825ed4bd>] compat_ipv6_setsockopt+0x15d/0x1d0 net/ipv6/ipv6_sockglue.c:940
 [<ffffffff823d0627>] inet_csk_compat_setsockopt+0x97/0x120 net/ipv4/inet_connection_sock.c:914
 [<ffffffff823e456d>] compat_tcp_setsockopt+0x3d/0x70 net/ipv4/tcp.c:2654
 [<ffffffff821c9e34>] compat_sock_common_setsockopt+0xb4/0x150 net/core/sock.c:2670
 [<ffffffff822982b9>] C_SYSC_setsockopt net/compat.c:385 [inline]
 [<ffffffff822982b9>] compat_SyS_setsockopt+0x169/0x700 net/compat.c:368
 [<ffffffff82299588>] C_SYSC_socketcall net/compat.c:836 [inline]
 [<ffffffff82299588>] compat_SyS_socketcall+0x508/0x630 net/compat.c:771
 [<ffffffff8100629e>] do_syscall_32_irqs_on arch/x86/entry/common.c:396 [inline]
 [<ffffffff8100629e>] do_fast_syscall_32+0x31e/0xa80 arch/x86/entry/common.c:463
 [<ffffffff82707410>] sysenter_flags_fixed+0xd/0x1a

Allocated by task 4521:
 [<ffffffff8102e6b6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff8147e7e2>] save_stack mm/kasan/kasan.c:512 [inline]
 [<ffffffff8147e7e2>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff8147e7e2>] kasan_kmalloc.part.1+0x62/0xf0 mm/kasan/kasan.c:616
 [<ffffffff8147ea5f>] kasan_kmalloc+0xaf/0xc0 mm/kasan/kasan.c:601
 [<ffffffff8147aa27>] kmem_cache_alloc_trace+0x117/0x2d0 mm/slub.c:2642
 [<ffffffff8216c9f2>] kmalloc include/linux/slab.h:476 [inline]
 [<ffffffff8216c9f2>] kzalloc include/linux/slab.h:620 [inline]
 [<ffffffff8216c9f2>] snd_timer_instance_new+0x52/0x3a0 sound/core/timer.c:106
 [<ffffffff8216d3dc>] snd_timer_open+0x69c/0x12f0 sound/core/timer.c:289
 [<ffffffff82176996>] snd_timer_user_tselect sound/core/timer.c:1604 [inline]
 [<ffffffff82176996>] __snd_timer_user_ioctl.isra.22+0x666/0x2570 sound/core/timer.c:1893
 [<ffffffff82178d10>] __snd_timer_user_ioctl_compat sound/core/timer_compat.c:131 [inline]
 [<ffffffff82178d10>] snd_timer_user_ioctl_compat+0x470/0x610 sound/core/timer_compat.c:151
 [<ffffffff815936ef>] C_SYSC_ioctl fs/compat_ioctl.c:1592 [inline]
 [<ffffffff815936ef>] compat_SyS_ioctl+0x4af/0x2220 fs/compat_ioctl.c:1544
 [<ffffffff8100629e>] do_syscall_32_irqs_on arch/x86/entry/common.c:396 [inline]
 [<ffffffff8100629e>] do_fast_syscall_32+0x31e/0xa80 arch/x86/entry/common.c:463
 [<ffffffff82707410>] sysenter_flags_fixed+0xd/0x1a

Freed by task 4508:
 [<ffffffff8102e6b6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff8147f0dc>] save_stack mm/kasan/kasan.c:512 [inline]
 [<ffffffff8147f0dc>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff8147f0dc>] kasan_slab_free+0xac/0x190 mm/kasan/kasan.c:589
 [<ffffffff8147c4b4>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff8147c4b4>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff8147c4b4>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff8147c4b4>] kfree+0xf4/0x310 mm/slub.c:3749
 [<ffffffff82173206>] snd_timer_close+0x6b6/0xd10 sound/core/timer.c:386
 [<ffffffff821738f7>] snd_timer_user_release+0x97/0x130 sound/core/timer.c:1354
 [<ffffffff81496d65>] __fput+0x235/0x6f0 fs/file_table.c:208
 [<ffffffff814972a5>] ____fput+0x15/0x20 fs/file_table.c:244
 [<ffffffff8112f19f>] task_work_run+0x10f/0x190 kernel/task_work.c:115
 [<ffffffff81003edd>] tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 [<ffffffff81003edd>] exit_to_usermode_loop+0x13d/0x160 arch/x86/entry/common.c:254
 [<ffffffff81006712>] prepare_exit_to_usermode arch/x86/entry/common.c:287 [inline]
 [<ffffffff81006712>] syscall_return_slowpath arch/x86/entry/common.c:352 [inline]
 [<ffffffff81006712>] do_syscall_32_irqs_on arch/x86/entry/common.c:402 [inline]
 [<ffffffff81006712>] do_fast_syscall_32+0x792/0xa80 arch/x86/entry/common.c:463
 [<ffffffff82707410>] sysenter_flags_fixed+0xd/0x1a

The buggy address belongs to the object at ffff8800b697e000
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 152 bytes inside of
 256-byte region [ffff8800b697e000, ffff8800b697e100)
The buggy address belongs to the page:
Initializing cgroup subsys cpu
Initializing cgroup subsys cpuacct
Linux version 4.4.159+ (syzkaller@ci) (gcc version 8.0.1 20180413 (experimental) (GCC) ) #42 SMP PREEMPT Sat Sep 29 15:58:37 UTC 2018
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 0x000f2c40-0x000f2c4f] mapped at [ffff8800000f2c40]
Using GB pages for direct mapping
ACPI: Early table checksum verification disabled
ACPI: RSDP 0x00000000000F2A10 000014 (v00 Google)
ACPI: RSDT 0x00000000BFFFDBA0 000038 (v01 Google GOOGRSDT 00000001 GOOG 00000001)
ACPI: FACP 0x00000000BFFFFF00 0000F4 (v02 Google GOOGFACP 00000001 GOOG 00000001)
ACPI: DSDT 0x00000000BFFFDBE0 0017B2 (v01 Google GOOGDSDT 00000001 GOOG 00000001)
ACPI: FACS 0x00000000BFFFFEC0 000040
ACPI: FACS 0x00000000BFFFFEC0 000040
ACPI: SSDT 0x00000000BFFFF590 000930 (v01 Google GOOGSSDT 00000001 GOOG 00000001)
ACPI: APIC 0x00000000BFFFF4A0 000076 (v01 Google GOOGAPIC 00000001 GOOG 00000001)
ACPI: WAET 0x00000000BFFFF470 000028 (v01 Google GOOGWAET 00000001 GOOG 00000001)
ACPI: SRAT 0x00000000BFFFF3A0 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 1458518162 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 s130824 r8192 d28920 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: 6609228K/7863916K available (23595K kernel code, 3772K rwdata, 5012K rodata, 1300K init, 23352K bss, 1254688K 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 2300.000 MHz processor
Calibrating delay loop (skipped) preset value.. 4600.00 BogoMIPS (lpj=23000000)
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 (9200.00 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 [mem 0xbbffd000-0xbfffd000] (64MB) mapped at [ffff8800bbffd000-ffff8800bfffcfff]
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(1538278172.869:1): 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: 28656 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
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 <maxk@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.
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
 sda: sda1
tsc: Refined TSC clocksource calibration: 2300.006 MHz
clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x21273ac4d85, max_idle_ns: 440795266965 ns
usbcore: registered new interface driver asix
usbcore: registered new interface driver ax88179_178a
usbcore: registered new interface driver cdc_ether
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
sd 0:0:1:0: [sda] Attached SCSI disk
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-devel@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 2018-09-30 03:29:34 UTC (1538278174)
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): INFO: recovery required on readonly filesystem
EXT4-fs (sda1): write access will be enabled during recovery
EXT4-fs (sda1): recovery complete
EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
VFS: Mounted root (ext4 filesystem) readonly on device 8:1.
devtmpfs: mounted
Freeing unused kernel memory: 1300K
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(1538278175.950:2): policy loaded auid=4294967295 ses=4294967295
stty (358) used greatest stack depth: 26112 bytes left
run-parts (359) used greatest stack depth: 25232 bytes left
audit: type=1400 audit(1538278177.260:3): avc:  denied  { associate } for  pid=462 comm="restorecon" name="pts" dev="devtmpfs" ino=4767 scontext=system_u:object_r:devpts_t:s0 tcontext=system_u:object_r:device_t:s0 tclass=filesystem permissive=1

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/09/30 03:29 https://android.googlesource.com/kernel/common android-4.4 624c09594792 41e4b329 .config console log report ci-android-44-kasan-gce-386
* Struck through repros no longer work on HEAD.