Re: page fault in __asan_load8 (5)

To: riastradh%NetBSD.org@localhost, syzkaller-netbsd-bugs%googlegroups.com@localhost
Subject: Re: page fault in __asan_load8 (5)
From: syzbot <syzbot+19b1bf83e5481273eafc%syzkaller.appspotmail.com@localhost>
Date: Thu, 07 Jul 2022 09:53:10 -0700
Hello,

syzbot tried to test the proposed patch but the build/boot failed:

 \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | +1519808/ - \ | / -  [1518792\ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | +991434/ - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | / - \ | ]=0x3665890
/ - \ | / - \ | / - \ | / - \ | / - \ | / - \ | Loading /var/db/entropy-file  
[   1.0000000] cpu_rng: rdrand/rdseed
[   1.0000000] entropy: ready
[   1.0000000] entropy: entering seed from bootloader with 256 bits of entropy
[   1.0000000] ksyms: checking .text
[   1.0000000] ksyms: checking .rodata.hotpatch
[   1.0000000] ksyms: checking .rodata
[   1.0000000] ksyms: checking .eh_frame
[   1.0000000] ksyms: checking link_set_x86_hotpatch_descriptors
[   1.0000000] ksyms: checking link_set_sdt_argtypes_set
[   1.0000000] ksyms: checking link_set_sdt_probes_set
[   1.0000000] ksyms: checking link_set_sdt_providers_set
[   1.0000000] ksyms: checking link_set_modules
[   1.0000000] ksyms: checking link_set_sysctl_funcs
[   1.0000000] ksyms: checking link_set_acpi_device_calls
[   1.0000000] ksyms: checking link_set_evcnts
[   1.0000000] ksyms: checking link_set_linux_module_param_desc
[   1.0000000] ksyms: checking link_set_linux_module_param_info
[   1.0000000] ksyms: checking link_set_domains
[   1.0000000] ksyms: checking link_set_ieee80211_funcs
[   1.0000000] ksyms: checking link_set_ah_chips
[   1.0000000] ksyms: checking link_set_ah_rfs
[   1.0000000] ksyms: checking link_set_dkwedge_methods
[   1.0000000] ksyms: checking link_set_prop_linkpools
[   1.0000000] ksyms: checking .data
[   1.0000000] ksyms: checking .dtors
[   1.0000000] ksyms: checking .data.cacheline_aligned
[   1.0000000] ksyms: checking .data.read_mostly
[   1.0000000] ksyms: checking .bss
[   1.0000000] ksyms: checking .note.netbsd.ident
[   1.0000000] ksyms: checking .note.Xen
[   1.0000000] ksyms: checking .ident
[   1.0000000] ksyms: checking .comment
[   1.0000000] ksyms: checking .gnu_debuglink
[   1.0000000] ksyms: checking .symtab
[   1.0000000] ksyms: checking .strtab
[   1.0000000] ksyms: checking .shstrtab
[   1.0000000] Loaded initial symtab at 0xffffffff83600af8, strtab at 0xffffffff837737c0, # entries 63283
[   1.0000000] Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
[   1.0000000]     2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
[   1.0000000]     2018, 2019, 2020, 2021, 2022
[   1.0000000]     The NetBSD Foundation, Inc.  All rights reserved.
[   1.0000000] Copyright (c) 1982, 1986, 1989, 1991, 1993
[   1.0000000]     The Regents of the University of California.  All rights reserved.

[   1.0000000] NetBSD 9.99.98 (GENERIC_SYZKALLER) #0: Thu Jul  7 16:42:49 UTC 2022
[   1.0000000] 	root@ci2:/syzkaller/jobs/netbsd/kernel/sys/arch/amd64/compile/obj/GENERIC_SYZKALLER
[   1.0000000] total memory = 8191 MB
[   1.0000000] avail memory = 7088 MB
[   1.0000030] mainbus0 (root)
[   1.0000030] ACPI: RSDP 0x00000000000F2740 000014 (v00 Google)
[   1.0000030] ACPI: RSDT 0x00000000BFFFFF90 000038 (v01 Google GOOGRSDT 00000001 GOOG 00000001)
[   1.0000030] ACPI: FACP 0x00000000BFFFF330 0000F4 (v02 Google GOOGFACP 00000001 GOOG 00000001)
[   1.0000030] ACPI: DSDT 0x00000000BFFFD8C0 001A64 (v01 Google GOOGDSDT 00000001 GOOG 00000001)
[   1.0000030] ACPI: FACS 0x00000000BFFFD880 000040
[   1.0000030] ACPI: SRAT 0x00000000BFFFFE60 0000C8 (v03 Google GOOGSRAT 00000001 GOOG 00000001)
[   1.0000030] ACPI: APIC 0x00000000BFFFFDB0 000076 (v05 Google GOOGAPIC 00000001 GOOG 00000001)
[   1.0000030] ACPI: SSDT 0x00000000BFFFF430 000980 (v01 Google GOOGSSDT 00000001 GOOG 00000001)
[   1.0000030] ACPI: WAET 0x00000000BFFFFE30 000028 (v01 Google GOOGWAET 00000001 GOOG 00000001)
[   1.0000030] ACPI: 2 ACPI AML tables successfully acquired and loaded
[   1.0000030] ioapic0 at mainbus0 apid 0
[   1.0000030] cpu0 at mainbus0 apid 0
[   1.0000030] cpu0: Intel(R) Xeon(R) CPU @ 2.20GHz, id 0x406f0
[   1.0000030] cpu0: node 0, package 0, core 0, smt 0
[   1.0000030] cpu1 at mainbus0 apid 1
[   1.0000030] cpu1: Intel(R) Xeon(R) CPU @ 2.20GHz, id 0x406f0
[   1.0000030] cpu1: node 0, package 0, core 0, smt 1
[   1.0000030] acpi0 at mainbus0: Intel ACPICA 20211217
[   1.0000030] acpi0: fixed power button present
[   1.0000030] acpi0: fixed sleep button present
[   1.0292182] pckbc1 at acpi0 (KBD, PNP0303) (kbd port): io 0x60,0x64 irq 1
[   1.0292182] pckbc2 at acpi0 (MOU, PNP0F13) (aux port): irq 12
[   1.0292182] com0 at acpi0 (COM1, PNP0501-1): io 0x3f8-0x3ff irq 4
[   1.0292182] com: ns16550a, 16-byte FIFO
[   1.0292182] com0: console
[   1.0292182] com1 at acpi0 (COM2, PNP0501-2): io 0x2f8-0x2ff irq 3
[   1.0292182] com1: ns16550a, 16-byte FIFO
[   1.0292182] com2 at acpi0 (COM3, PNP0501-3): io 0x3e8-0x3ef irq 6
[   1.0292182] com2: ns16550a, 16-byte FIFO
[   1.0292182] com3 at acpi0 (COM4, PNP0501-4): io 0x2e8-0x2ef irq 7
[   1.0292182] com3: ns16550a, 16-byte FIFO
[   1.0292182] PEVT (QEMU0001) at acpi0 not configured
[   1.0292182] ACPI: Enabled 16 GPEs in block 00 to 0F
[   1.0292182] pckbd0 at pckbc1 (kbd slot)
[   1.0292182] pckbc1: using irq 1 for kbd slot
[   1.0292182] wskbd0 at pckbd0 mux 1
[   1.0292182] pms0 at pckbc1 (aux slot)
[   1.0292182] pckbc1: using irq 12 for aux slot
[   1.0292182] wsmouse0 at pms0 mux 0
[   1.0292182] pci0 at mainbus0 bus 0: configuration mode 1
[   1.0292182] pchb0 at pci0 dev 0 function 0: Intel 82441FX (PMC) PCI and Memory Controller (rev. 0x02)
[   1.0292182] pcib0 at pci0 dev 1 function 0: Intel 82371AB (PIIX4) PCI-ISA Bridge (rev. 0x03)
[   1.0292182] piixpm0 at pci0 dev 1 function 3: Intel 82371AB (PIIX4) Power Management Controller (rev. 0x03)
[   1.0292182] piixpm0: SMBus disabled
[   1.0292182] virtio0 at pci0 dev 3 function 0
[   1.0292182] virtio0: SCSI device (rev. 0x00)
[   1.0292182] vioscsi0 at virtio0: features: 0
[   1.0292182] vioscsi0: cmd_per_lun 256 qsize 8192 seg_max 64 max_target 253 max_lun 1
[   1.0292182] virtio0: config interrupting at msix0 vec 0
[   1.0292182] virtio0: queues interrupting at msix0 vec 1
[   1.0292182] scsibus0 at vioscsi0: 254 targets, 2 luns per target
[   1.0292182] virtio1 at pci0 dev 4 function 0
[   1.0292182] virtio1: network device (rev. 0x00)
[   1.0292182] vioif0 at virtio1: features: 0x20030020<EVENT_IDX,CTRL_VQ,STATUS,MAC>
[   1.0292182] vioif0: Ethernet address 42:01:0a:80:0a:2d
[   1.0292182] virtio1: config interrupting at msix1 vec 0
[   1.0292182] virtio1: queues interrupting at msix1 vec 1
[   1.0292182] genfb0 at pci0 dev 5 function 0: vendor 1ae0 product a002 (rev. 0x01)
[   1.0292182] virtio2 at pci0 dev 6 function 0
[   1.0292182] virtio2: memory balloon device (rev. 0x00)
[   1.0292182] viomb0 at virtio2: features: 0x1<MUST_TELL_HOST>
[   1.0292182] virtio2: interrupting at ioapic0 pin 10
[   1.0292182] virtio3 at pci0 dev 7 function 0
[   1.0292182] virtio3: entropy device (rev. 0x00)
[   1.0292182] viornd0 at virtio3: features: 0
[   1.0292182] virtio3: interrupting at ioapic0 pin 11
[   1.0292182] isa0 at pcib0
[   1.0292182] attimer0 at isa0 port 0x40-0x43
[   1.0292182] pcppi0 at isa0 port 0x61
[   1.0292182] spkr0 at pcppi0: PC Speaker
[   1.0292182] wsbell at spkr0 not configured
[   1.0292182] midi0 at pcppi0: PC speaker
[   1.0292182] sysbeep0 at pcppi0
[   1.0292182] attimer0: attached to pcppi0
[   1.0292182] acpicpu0 at cpu0: ACPI CPU
[   1.0292182] acpicpu1 at cpu1: ACPI CPU
[   1.8906908] cpu0 has 2 core siblings: cpu1 cpu0
[   1.9013069] cpu0 has 2 pkg siblings: cpu1 cpu0
[   1.9013069] cpu0 has 1 1st siblings: cpu0
[   1.9109171] cpu0 first in package: cpu0
[   1.9109171] cpu1 has 2 core siblings: cpu0 cpu1
[   1.9109171] cpu1 has 2 pkg siblings: cpu0 cpu1
[   1.9229915] cpu1 has 1 1st siblings: cpu0
[   1.9229915] cpu1 first in package: cpu0
[   2.0838371] sd0 at scsibus0 target 1 lun 0: <Google, PersistentDisk, 1> disk fixed
[   2.1022157] sd0: fabricating a geometry
[   2.1022157] sd0: 2048 MB, 2048 cyl, 64 head, 32 sec, 512 bytes/sect x 4194304 sectors
[   2.1222465] sd0: fabricating a geometry
[   2.1322123] dk0 at sd0: "49b813d1-8009-4c4f-b3e1-2cc288366ecc", 2097085 blocks at 64, type: ffs
[   2.1422303] dk1 at sd0: "2a5f9479-33b7-499d-8cc4-f8d9ae0937b7", 2097119 blocks at 2097152, type: swap
[   2.1522095] sd0: async, 8-bit transfers, tagged queueing
[   2.6522070] usb0 at vhci0: USB revision 2.0
[   2.6722555] uhub0 at usb0: NetBSD (0x0000) VHCI root hub (0x0000), class 9/0, rev 2.00/1.00, addr 1
[   3.0722258] usb1 at vhci1: USB revision 2.0
[   3.0922412] uhub1 at usb1: NetBSD (0x0000) VHCI root hub (0x0000), class 9/0, rev 2.00/1.00, addr 1
[   3.4722188] usb2 at vhci2: USB revision 2.0
[   3.5022362] uhub2 at usb2: NetBSD (0x0000) VHCI root hub (0x0000), class 9/0, rev 2.00/1.00, addr 1
[   3.8922200] usb3 at vhci3: USB revision 2.0
[   3.9122409] uhub3 at usb3: NetBSD (0x0000) VHCI root hub (0x0000), class 9/0, rev 2.00/1.00, addr 1
[   4.2922026] usb4 at vhci4: USB revision 2.0
[   4.3122362] uhub4 at usb4: NetBSD (0x0000) VHCI root hub (0x0000), class 9/0, rev 2.00/1.00, addr 1
[   4.6922009] usb5 at vhci5: USB revision 2.0
[   4.7222204] uhub5 at usb5: NetBSD (0x0000) VHCI root hub (0x0000), class 9/0, rev 2.00/1.00, addr 1
[   5.1021993] usb6 at vhci6: USB revision 2.0
[   5.1322309] uhub6 at usb6: NetBSD (0x0000) VHCI root hub (0x0000), class 9/0, rev 2.00/1.00, addr 1
[   5.5221987] usb7 at vhci7: USB revision 2.0
[   5.5522378] uhub7 at usb7: NetBSD (0x0000) VHCI root hub (0x0000), class 9/0, rev 2.00/1.00, addr 1
[   5.6122391] boot device: sd0
[   5.6122391] root on dk0 dumps on dk1
[   5.6221953] dump_misc_init: max_paddr = 0x240000000
[   5.6326701] mountroot: trying lfs...
[   5.6421949] mountroot: trying ffs...
[   5.6722132] root file system type: ffs
[   5.6859918] kern.module.path=/stand/amd64/9.99.98/modules
[   5.6933026] clock: unknown CMOS layout
[   5.7622390] init: copying out path `/sbin/init' 11
Thu Jul  7 16:46:37 UTC 2022
Fast boot: skipping disk checks.
[   7.3021889] /dev/dk0: file system not clean (fs_clean=0x4); please fsck(8)
[   7.3021889] /dev/dk0: lost blocks 0 files 0
swapctl: setting dump device to /dev/dk1
swapctl: adding /dev/dk1 as swap device at priority 0
Starting file system checks:
Loaded entropy from /var/db/entropy-file.
Setting tty flags.
Setting sysctl variables:
ddb.onpanic: 1 -> 1
ddb.commandonenter: trace;show registers -> "show registers;bt;show panic;ps;show all locks;show all pages;show all pools"
ddb.lines: 24 -> 0
ddb.maxwidth: 80 -> 0
Starting network.
ifconfig: SIOCAIFADDR: Invalid argument
route: writing to routing socket: Network is unreachable
route: writing to routing socket: Network is unreachable
route: writing to routing socket: Network is unreachable
route: writing to routing socket: Network is unreachable
route: writing to routing socket: Network is unreachable
route: writing to routing socket: Network is unreachable
route: writing to routing socket: Network is unreachable
route: writing to routing socket: Network is unreachable
route: writing to routing socket: Network is unreachable
route: writing to routing socket: Network is unreachable
route: writing to routing socket: Network is unreachable
route: writing to routing socket: Network is unreachable
route: writing to routing socket: Network is unreachable
IPv6 mode: host
Configuring network interfaces: vioif0dhcpcd-9.1.1 starting
DUID 00:04:ee:c2:5b:ab:74:4a:db:6b:de:f1:43:35:f7:c9:72:27
vioif0: SIOCGIFINFO_FLAGS: Invalid argument
vioif0: SIOCSIFINFO_FLAGS: Invalid argument
[  10.0351940] vioif0: link state UP (was UNKNOWN)
vioif0: carrier acquired
vioif0: SIOCGIFINFO_FLAGS: Invalid argument
vioif0: SIOCSIFINFO_FLAGS: Invalid argument
vioif0: IAID 0a:80:0a:2d
ipv6_readsecret: cannot write secret: No such file or directory
vioif0: ipv6_start: No such file or directory
vioif0: soliciting a DHCP lease
vioif0: offered 10.128.10.45 from 169.254.169.254
ipv4_addaddr: if_addaddress: Invalid argument
timed out
dhcpcd exited
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