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Date: Thu, 17 Dec 2020 02:14:10 -0800 From: syzbot <syzbot+73d662376f16e2a7336d@...kaller.appspotmail.com> To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: upstream boot error: UBSAN: null-ptr-deref in corrupted Hello, syzbot found the following issue on: HEAD commit: accefff5 Merge tag 'arm-soc-omap-genpd-5.11' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14567b7f500000 kernel config: https://syzkaller.appspot.com/x/.config?x=1e6efc730c219bd4 dashboard link: https://syzkaller.appspot.com/bug?extid=73d662376f16e2a7336d compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project.git ca2dcbd030eadbf0aa9b660efe864ff08af6e18b) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+73d662376f16e2a7336d@...kaller.appspotmail.com Linux version 5.10.0-syzkaller (syzkaller@...kaller) (clang version 11.0.0 (https://github.com/llvm/llvm-project.git ca2dcbd030eadbf0aa9b660efe864ff08af6e18b), GNU ld (GNU Binutils for Ubuntu) 2.26.1) #0 SMP PREEMPT now Command line: BOOT_IMAGE=/vmlinuz root=/dev/sda1 console=ttyS0 earlyprintk=serial vsyscall=native oops=panic panic_on_warn=1 nmi_watchdog=panic panic=86400 net.ifnames=0 sysctl.kernel.hung_task_all_cpu_backtrace=1 KERNEL supported cpus: Intel GenuineIntel AMD AuthenticAMD 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 0x0000000000100000-0x00000000bfffcfff] usable BIOS-e820: [mem 0x00000000bfffd000-0x00000000bfffffff] reserved BIOS-e820: [mem 0x00000000fffbc000-0x00000000ffffffff] reserved BIOS-e820: [mem 0x0000000100000000-0x000000023fffffff] usable printk: bootconsole [earlyser0] enabled ERROR: earlyprintk= earlyser already used ERROR: earlyprintk= earlyser already used ERROR: earlyprintk= earlyser already used nopcid: PCID feature disabled Malformed early option 'vsyscall' Malformed early option 'vsyscall' 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 kvm-clock: Using msrs 4b564d01 and 4b564d00 kvm-clock: cpu 0, msr dde2001, primary cpu clock kvm-clock: using sched offset of 3478136367 cycles clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns tsc: Detected 2300.000 MHz processor last_pfn = 0x240000 max_arch_pfn = 0x400000000 x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT last_pfn = 0xbfffd max_arch_pfn = 0x400000000 found SMP MP-table at [mem 0x000f25a0-0x000f25af] Using GB pages for direct mapping ACPI: Early table checksum verification disabled ACPI: RSDP 0x00000000000F2320 000014 (v00 Google) ACPI: RSDT 0x00000000BFFFFFA0 000038 (v01 Google GOOGRSDT 00000001 GOOG 00000001) ACPI: FACP 0x00000000BFFFF340 0000F4 (v02 Google GOOGFACP 00000001 GOOG 00000001) ================================================================================ UBSAN: null-ptr-deref in drivers/acpi/acpica/tbfadt.c:459:37 member access within null pointer of type 'struct acpi_table_fadt' CPU: 0 PID: 0 Comm: swapper Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: ================================================================================ ACPI: DSDT 0x00000000BFFFDA80 0018BA (v01 Google GOOGDSDT 00000001 GOOG 00000001) ACPI: FACS 0x00000000BFFFDA40 000040 ACPI: FACS 0x00000000BFFFDA40 000040 ACPI: SRAT 0x00000000BFFFFE70 0000C8 (v03 Google GOOGSRAT 00000001 GOOG 00000001) ACPI: APIC 0x00000000BFFFFDC0 000076 (v05 Google GOOGAPIC 00000001 GOOG 00000001) ACPI: SSDT 0x00000000BFFFF440 000980 (v01 Google GOOGSSDT 00000001 GOOG 00000001) ACPI: WAET 0x00000000BFFFFE40 000028 (v01 Google GOOGWAET 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 0x100000000-0x23fffffff] NUMA: Node 0 [mem 0x00000000-0x0009ffff] + [mem 0x00100000-0xbfffffff] -> [mem 0x00000000-0xbfffffff] NUMA: Node 0 [mem 0x00000000-0xbfffffff] + [mem 0x100000000-0x23fffffff] -> [mem 0x00000000-0x23fffffff] Faking node 0 at [mem 0x0000000000000000-0x000000013fffffff] (5120MB) Faking node 1 at [mem 0x0000000140000000-0x000000023fffffff] (4096MB) NODE_DATA(0) allocated [mem 0x13fffb000-0x13fffffff] NODE_DATA(1) allocated [mem 0x23fff8000-0x23fffcfff] Zone ranges: DMA [mem 0x0000000000001000-0x0000000000ffffff] DMA32 [mem 0x0000000001000000-0x00000000ffffffff] Normal [mem 0x0000000100000000-0x000000023fffffff] Device empty Movable zone start for each node Early memory node ranges node 0: [mem 0x0000000000001000-0x000000000009efff] node 0: [mem 0x0000000000100000-0x00000000bfffcfff] node 0: [mem 0x0000000100000000-0x000000013fffffff] node 1: [mem 0x0000000140000000-0x000000023fffffff] Zeroed struct page in unavailable ranges: 101 pages Initmem setup node 0 [mem 0x0000000000001000-0x000000013fffffff] Initmem setup node 1 [mem 0x0000000140000000-0x000000023fffffff] 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: hibernation: Registered nosave memory: [mem 0x00000000-0x00000fff] PM: hibernation: Registered nosave memory: [mem 0x0009f000-0x0009ffff] PM: hibernation: Registered nosave memory: [mem 0x000a0000-0x000effff] PM: hibernation: Registered nosave memory: [mem 0x000f0000-0x000fffff] PM: hibernation: Registered nosave memory: [mem 0xbfffd000-0xbfffffff] PM: hibernation: Registered nosave memory: [mem 0xc0000000-0xfffbbfff] PM: hibernation: 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: 19112604462750000 ns setup_percpu: NR_CPUS:8 nr_cpumask_bits:8 nr_cpu_ids:2 nr_node_ids:2 percpu: Embedded 63 pages/cpu s221000 r8192 d28856 u1048576 kvm-guest: stealtime: cpu 0, msr b9e1fb00 kvm-guest: PV spinlocks enabled PV qspinlock hash table entries: 256 (order: 0, 4096 bytes, linear) Built 2 zonelists, mobility grouping on. Total pages: 2064261 Policy zone: Normal Kernel command line: earlyprintk=serial oops=panic panic_on_warn=1 nmi_watchdog=panic panic=86400 net.ifnames=0 sysctl.kernel.hung_task_all_cpu_backtrace=1 ima_policy=tcb watchdog_thresh=55 workqueue.watchdog_thresh=140 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 vivid.n_devs=16 vivid.multiplanar=1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2 netrom.nr_ndevs=16 rose.rose_ndevs=16 spec_store_bypass_disable=prctl numa=fake=2 nopcid dummy_hcd.num=8 binder.debug_mask=0 rcupdate.rcu_expedited=1 root=/dev/sda console=ttyS0 vsyscall=native BOOT_IMAGE=/vmlinuz root=/dev/sda1 console=ttyS0 earlyprintk=serial vsyscall=native oops=panic panic_on_warn=1 nmi_watchdog=panic panic=86400 net.ifnames=0 sysctl.kernel.hung_task_all_cpu_backtrace=1 mem auto-init: stack:off, heap alloc:on, heap free:off Memory: 6874060K/8388204K available (124958K kernel code, 24337K rwdata, 32104K rodata, 3276K init, 26932K bss, 1513888K reserved, 0K cma-reserved) SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=2 Running RCU self tests rcu: Preemptible hierarchical RCU implementation. rcu: RCU lockdep checking is enabled. rcu: RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2. rcu: RCU callback double-/use-after-free debug enabled. rcu: RCU debug extended QS entry/exit. All grace periods are expedited (rcu_expedited). Trampoline variant of Tasks RCU enabled. Tracing variant of Tasks RCU enabled. rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies. rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2 NR_IRQS: 4352, nr_irqs: 440, preallocated irqs: 16 random: crng done (trusting CPU's manufacturer) Console: colour VGA+ 80x25 printk: console [ttyS0] enabled printk: console [ttyS0] enabled printk: bootconsole [earlyser0] disabled printk: 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: 8192 ... CLASSHASH_SIZE: 4096 ... MAX_LOCKDEP_ENTRIES: 32768 ... MAX_LOCKDEP_CHAINS: 65536 ... CHAINHASH_SIZE: 32768 memory used by lock dependency info: 6365 kB memory used for stack traces: 4224 kB per task-struct memory footprint: 1920 bytes mempolicy: Enabling automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl ACPI: Core revision 20201113 APIC: Switch to symmetric I/O mode setup ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1 clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x212735223b2, max_idle_ns: 440795277976 ns Calibrating delay loop (skipped) preset value.. 4600.00 BogoMIPS (lpj=23000000) pid_max: default: 32768 minimum: 301 LSM: Security Framework initializing Yama: becoming mindful. TOMOYO Linux initialized Smack: Initializing. Smack: Netfilter enabled. Smack: IPv6 Netfilter enabled. LSM support for eBPF active Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes, vmalloc) Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes, vmalloc) Mount-cache hash table entries: 16384 (order: 5, 131072 bytes, vmalloc) Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes, vmalloc) Last level iTLB entries: 4KB 1024, 2MB 1024, 4MB 1024 Last level dTLB entries: 4KB 1024, 2MB 1024, 4MB 1024, 1GB 4 Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization Spectre V2 : Spectre mitigation: kernel not compiled with retpoline; no mitigation available! Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl MDS: Mitigation: Clear CPU buffers Freeing SMP alternatives memory: 88K kvm-clock: cpu 1, msr dde2041, secondary cpu clock --- This report 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@...glegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
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