Messages in this thread | | | From | Dmitry Vyukov <> | Date | Thu, 5 Jul 2018 18:18:47 +0200 | Subject | Re: KASAN: stack-out-of-bounds Read in __run_timers |
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On Thu, Jul 5, 2018 at 6:49 AM, syzbot <syzbot+833f0280096341307b18@syzkaller.appspotmail.com> wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: 2bdea157b999 Merge branch 'sctp-fully-support-for-dscp-and.. > git tree: bpf-next > console output: https://syzkaller.appspot.com/x/log.txt?x=15438ad0400000 > kernel config: https://syzkaller.appspot.com/x/.config?x=f62553dc846b0692 > dashboard link: https://syzkaller.appspot.com/bug?extid=833f0280096341307b18 > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=12c1f4c2400000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16310594400000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+833f0280096341307b18@syzkaller.appspotmail.com
#syz dup: KASAN: stack-out-of-bounds Read in timerqueue_add
> ================================================================== > BUG: KASAN: stack-out-of-bounds in lookup_object lib/debugobjects.c:157 > [inline] > BUG: KASAN: stack-out-of-bounds in debug_object_deactivate+0x425/0x450 > lib/debugobjects.c:540 > Read of size 8 at addr ffff8801ca8254e8 by task swapper/0/0 > > CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.18.0-rc3+ #45 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > <IRQ> > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 > print_address_description+0x6c/0x20b mm/kasan/report.c:256 > kasan_report_error mm/kasan/report.c:354 [inline] > kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412 > __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 > lookup_object lib/debugobjects.c:157 [inline] > debug_object_deactivate+0x425/0x450 lib/debugobjects.c:540 > debug_timer_deactivate kernel/time/timer.c:714 [inline] > debug_deactivate kernel/time/timer.c:770 [inline] > detach_timer kernel/time/timer.c:815 [inline] > expire_timers kernel/time/timer.c:1353 [inline] > __run_timers+0x571/0xc70 kernel/time/timer.c:1666 > run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692 > __do_softirq+0x2e8/0xb17 kernel/softirq.c:288 > ? __sanitizer_cov_trace_const_cmp4+SeaBIOS (version > 1.8.2-20171130_102032-google) > Linux version 4.18.0-rc3+ (syzkaller@ci) (gcc version 8.0.1 20180413 > (experimental) (GCC)) #45 SMP Wed Jul 4 07:02:20 UTC 2018 > Command line: BOOT_IMAGE=/vmlinuz root=/dev/sda1 console=ttyS0 > earlyprintk=serial vsyscall=native rodata=n ftrace_dump_on_oops=orig_cpu > oops=panic panic_on_warn=1 nmi_watchdog=panic panic=86400 kvm-intel.nested=1 > nf-conntrack-ftp.ports=20000 nf-conntrack-tftp.ports=20000 > nf-conntrack-sip.ports=20000 nf-conntrack-irc.ports=20000 > nf-conntrack-sane.ports=20000 nopcid > x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers' > x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers' > x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers' > x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256 > x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using > 'standard' format. > 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 0x0000000000100000-0x00000000bfff2fff] usable > BIOS-e820: [mem 0x00000000bfff3000-0x00000000bfffffff] reserved > BIOS-e820: [mem 0x00000000fffbc000-0x00000000ffffffff] reserved > BIOS-e820: [mem 0x0000000100000000-0x000000021fffffff] usable > bootconsole [earlyser0] enabled > Malformed early option 'vsyscall' > nopcid: PCID feature disabled > NX (Execute Disable) protection: active > SMBIOS 2.4 present. > DMI: Google Google Compute Engine/Google Compute Engine, BIOS Google > 01/01/2011 > Hypervisor detected: KVM > last_pfn = 0x220000 max_arch_pfn = 0x400000000 > x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT > last_pfn = 0xbfff3 max_arch_pfn = 0x400000000 > found SMP MP-table at [mem 0x000f2310-0x000f231f] mapped at > [(____ptrval____)] > Scanning 1 areas for low memory corruption > Using GB pages for direct mapping > ACPI: Early table checksum verification disabled > ACPI: RSDP 0x00000000000F22D0 000014 (v00 Google) > ACPI: RSDT 0x00000000BFFF3430 000038 (v01 Google GOOGRSDT 00000001 GOOG > 00000001) > ACPI: FACP 0x00000000BFFFCF60 0000F4 (v02 Google GOOGFACP 00000001 GOOG > 00000001) > ACPI: DSDT 0x00000000BFFF3470 0017B2 (v01 Google GOOGDSDT 00000001 GOOG > 00000001) > ACPI: FACS 0x00000000BFFFCF00 000040 > ACPI: FACS 0x00000000BFFFCF00 000040 > ACPI: SSDT 0x00000000BFFF65F0 00690D (v01 Google GOOGSSDT 00000001 GOOG > 00000001) > ACPI: APIC 0x00000000BFFF5D10 000076 (v01 Google GOOGAPIC 00000001 GOOG > 00000001) > ACPI: WAET 0x00000000BFFF5CE0 000028 (v01 Google GOOGWAET 00000001 GOOG > 00000001) > ACPI: SRAT 0x00000000BFFF4C30 0000C8 (v01 Google GOOGSRAT 00000001 GOOG > 00000001) > SRAT: PXM 0 -> APIC 0x00 -> Node 0 > SRAT: PXM 0 -> APIC 0x01 -> Node 0 > ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff] > ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0xbfffffff] > ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x21fffffff] > NUMA: Node 0 [mem 0x00000000-0x0009ffff] + [mem 0x00100000-0xbfffffff] -> > [mem 0x00000000-0xbfffffff] > NUMA: Node 0 [mem 0x00000000-0xbfffffff] + [mem 0x100000000-0x21fffffff] -> > [mem 0x00000000-0x21fffffff] > NODE_DATA(0) allocated [mem 0x21fffa000-0x21fffdfff] > kvm-clock: cpu 0, msr 2:1fff8001, primary cpu clock > kvm-clock: Using msrs 4b564d01 and 4b564d00 > kvm-clock: using sched offset of 5084926845 cycles > clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, > max_idle_ns: 881590591483 ns > Zone ranges: > DMA [mem 0x0000000000001000-0x0000000000ffffff] > DMA32 [mem 0x0000000001000000-0x00000000ffffffff] > Normal [mem 0x0000000100000000-0x000000021fffffff] > Movable zone start for each node > Early memory node ranges > node 0: [mem 0x0000000000001000-0x000000000009efff] > node 0: [mem 0x0000000000100000-0x00000000bfff2fff] > node 0: [mem 0x0000000100000000-0x000000021fffffff] > Initmem setup node 0 [mem 0x0000000000001000-0x000000021fffffff] > Reserved but unavailable: 111 pages > 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 > PM: Registered nosave memory: [mem 0x00000000-0x00000fff] > PM: Registered nosave memory: [mem 0x0009f000-0x0009ffff] > PM: Registered nosave memory: [mem 0x000a0000-0x000effff] > PM: Registered nosave memory: [mem 0x000f0000-0x000fffff] > PM: Registered nosave memory: [mem 0xbfff3000-0xbfffffff] > PM: Registered nosave memory: [mem 0xc0000000-0xfffbbfff] > PM: Registered nosave memory: [mem 0xfffbc000-0xffffffff] > [mem 0xc0000000-0xfffbbfff] available for PCI devices > Booting paravirtualized kernel on KVM > clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, > max_idle_ns: 1910969940391419 ns > random: get_random_bytes called from boot_init_stack_canary > arch/x86/include/asm/stackprotector.h:75 [inline] with crng_init=0 > random: get_random_bytes called from start_kernel+0x112/0x949 > init/main.c:559 with crng_init=0 > setup_percpu: NR_CPUS:64 nr_cpumask_bits:64 nr_cpu_ids:2 nr_node_ids:1 > percpu: Embedded 56 pages/cpu @(____ptrval____) s188616 r8192 d32568 > u1048576 > Built 1 zonelists, mobility grouping on. Total pages: 1935228 > Policy zone: Normal > Kernel command line: BOOT_IMAGE=/vmlinuz root=/dev/sda1 console=ttyS0 > earlyprintk=serial vsyscall=native rodata=n ftrace_dump_on_oops=orig_cpu > oops=panic panic_on_warn=1 nmi_watchdog=panic panic=86400 kvm-intel.nested=1 > nf-conntrack-ftp.ports=20000 nf-conntrack-tftp.ports=20000 > nf-conntrack-sip.ports=20000 nf-conntrack-irc.ports=20000 > nf-conntrack-sane.ports=20000 nopcid > Memory: 6499788K/7863876K available (110620K kernel code, 12321K rwdata, > 16056K rodata, 3968K init, 23144K bss, 1364088K reserved, 0K cma-reserved) > Running RCU self tests > Hierarchical RCU implementation. > RCU lockdep checking is enabled. > RCU restricting CPUs from NR_CPUS=64 to nr_cpu_ids=2. > RCU callback double-/use-after-free debug enabled. > RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2 > NR_IRQS: 4352, nr_irqs: 440, preallocated irqs: 16 > Console: colour VGA+ 80x25 > 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: 7391 kB > per task-struct memory footprint: 1920 bytes > ACPI: Core revision 20180531 > APIC: Switch to symmetric I/O mode setup > x2apic enabled > Switched APIC routing to physical x2apic. > ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1 > tsc: Detected 2300.000 MHz processor > clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x212735223b2, > max_idle_ns: 440795277976 ns > Calibrating delay loop (skipped) preset value.. 4600.00 BogoMIPS > (lpj=2300000) > pid_max: default: 32768 minimum: 301 > Security Framework initialized > Yama: becoming mindful. > SELinux: Initializing. > AppArmor: AppArmor disabled by boot time parameter > Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes) > Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes) > Mount-cache hash table entries: 16384 (order: 5, 131072 bytes) > Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes) > CPU: Physical Processor ID: 0 > mce: CPU supports 32 MCE banks > 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 > Speculative Store Bypass: Vulnerable > Freeing SMP alternatives memory: 64K > 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. > Hierarchical SRCU implementation. > NMI watchdog: Perf event create on CPU 0 failed with -2 > NMI watchdog: Perf NMI watchdog permanently disabled > smp: Bringing up secondary CPUs ... > x86: Booting SMP configuration: > .... node #0, CPUs: #1 > kvm-clock: cpu 1, msr 2:1fff8041, secondary cpu clock > smp: Brought up 1 node, 2 CPUs > smpboot: Max logical packages: 1 > smpboot: Total of 2 processors activated (9200.00 BogoMIPS) > devtmpfs: initialized > kworker/u4:0 (24) used greatest stack depth: 24072 bytes left > clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: > 1911260446275000 ns > futex hash table entries: 512 (order: 4, 65536 bytes) > xor: automatically using best checksumming function avx > RTC time: 1:09:13, date: 07/05/18 > NET: Registered protocol family 16 > audit: initializing netlink subsys (disabled) > audit: type=2000 audit(1530752952.920:1): state=initialized audit_enabled=0 > res=1 > kworker/u4:1 (40) used greatest stack depth: 23840 bytes left > cpuidle: using governor menu > ACPI: bus type PCI registered > PCI: Using configuration type 1 for base access > kworker/u4:3 (167) used greatest stack depth: 21704 bytes left > HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages > cryptd: max_cpu_qlen set to 1000 > raid6: sse2x1 gen() 1707 MB/s > raid6: sse2x1 xor() 1011 MB/s > raid6: sse2x2 gen() 3695 MB/s > raid6: sse2x2 xor() 1945 MB/s > raid6: sse2x4 gen() 6042 MB/s > raid6: sse2x4 xor() 3408 MB/s > raid6: avx2x1 gen() 968 MB/s > raid6: avx2x1 xor() 1904 MB/s > raid6: avx2x2 gen() 4250 MB/s > raid6: avx2x2 xor() 3867 MB/s > raid6: avx2x4 gen() 11429 MB/s > raid6: avx2x4 xor() 5939 MB/s > raid6: using algorithm avx2x4 gen() 11429 MB/s > raid6: .... xor() 5939 MB/s, rmw enabled > raid6: using avx2x2 recovery algorithm > ACPI: Added _OSI(Module Device) > ACPI: Added _OSI(Processor Device) > ACPI: Added _OSI(3.0 _SCP Extensions) > ACPI: Added _OSI(Processor Aggregator Device) > ACPI: Added _OSI(Linux-Dell-Video) > ACPI: 2 ACPI AML tables successfully acquired and loaded > ACPI: Interpreter enabled > ACPI: (supports S0 S3 S4 S5) > ACPI: Using IOAPIC for interrupt routing > PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and > report a bug > ACPI: Enabled 16 GPEs in block 00 to 0F > ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff]) > acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI] > acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM > acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI > configuration space under this bridge. > 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) > 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 > pps_core: LinuxPPS API ver. 1 registered > pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti > <giometti@linux.it> > PTP clock support registered > EDAC MC: Ver: 3.0.0 > Advanced Linux Sound Architecture Driver Initialized. > PCI: Using ACPI for IRQ routing > Bluetooth: Core ver 2.22 > NET: Registered protocol family 31 > Bluetooth: HCI device and connection manager initialized > Bluetooth: HCI socket layer initialized > Bluetooth: L2CAP socket layer initialized > Bluetooth: SCO socket layer initialized > NET: Registered protocol family 8 > NET: Registered protocol family 20 > NetLabel: Initializing > NetLabel: domain hash size = 128 > NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO > NetLabel: unlabeled traffic allowed by default > > > --- > This bug is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@googlegroups.com. > > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with > syzbot. > syzbot can test patches for this bug, for details see: > https://goo.gl/tpsmEJ#testing-patches > > -- > You received this message because you are subscribed to the Google Groups > "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to syzkaller-bugs+unsubscribe@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/0000000000002a71b20570394434%40google.com. > For more options, visit https://groups.google.com/d/optout.
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