Re: [syzbot] BUG: unable to handle kernel paging request in p9_client_disconnect
From: syzbot
Date: Sat Jan 07 2023 - 16:35:54 EST
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
_idle_ns: 19112604462750000 ns
[ 0.145941][ T1] futex hash table entries: 512 (order: 4, 65536 bytes, linear)
[ 0.153846][ T12] Callback from call_rcu_tasks_trace() invoked.
[ 0.162653][ T1] SMBIOS 3.4.0 present.
[ 0.162677][ T1] DMI: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
[ 0.165306][ T1] NET: Registered PF_NETLINK/PF_ROUTE protocol family
[ 0.167194][ T1] DMA: preallocated 1024 KiB GFP_KERNEL pool for atomic allocations
[ 0.167351][ T1] DMA: preallocated 1024 KiB GFP_KERNEL|GFP_DMA pool for atomic allocations
[ 0.168428][ T1] DMA: preallocated 1024 KiB GFP_KERNEL|GFP_DMA32 pool for atomic allocations
[ 0.168529][ T1] audit: initializing netlink subsys (disabled)
[ 0.168770][ T26] audit: type=2000 audit(0.160:1): state=initialized audit_enabled=0 res=1
[ 0.173355][ T1] thermal_sys: Registered thermal governor 'step_wise'
[ 0.173365][ T1] thermal_sys: Registered thermal governor 'power_allocator'
[ 0.173462][ T1] cpuidle: using governor menu
[ 0.173489][ T1] NET: Registered PF_QIPCRTR protocol family
[ 0.173821][ T1] hw-breakpoint: found 6 breakpoint and 4 watchpoint registers.
[ 0.173920][ T1] ASID allocator initialised with 65536 entries
[ 0.173945][ T1] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
[ 0.174119][ T1] Serial: AMBA PL011 UART driver
[ 0.267352][ T1] HugeTLB: registered 1.00 GiB page size, pre-allocated 0 pages
[ 0.267362][ T1] HugeTLB: 16380 KiB vmemmap can be freed for a 1.00 GiB page
[ 0.267372][ T1] HugeTLB: registered 32.0 MiB page size, pre-allocated 0 pages
[ 0.267380][ T1] HugeTLB: 508 KiB vmemmap can be freed for a 32.0 MiB page
[ 0.267389][ T1] HugeTLB: registered 2.00 MiB page size, pre-allocated 0 pages
[ 0.267396][ T1] HugeTLB: 28 KiB vmemmap can be freed for a 2.00 MiB page
[ 0.267406][ T1] HugeTLB: registered 64.0 KiB page size, pre-allocated 0 pages
[ 0.267413][ T1] HugeTLB: 0 KiB vmemmap can be freed for a 64.0 KiB page
[ 0.435009][ T11] Callback from call_rcu_tasks() invoked.
[ 0.435038][ T1] raid6: neonx8 gen() 6167 MB/s
[ 0.605099][ T1] raid6: neonx4 gen() 5716 MB/s
[ 0.775312][ T1] raid6: neonx2 gen() 5058 MB/s
[ 0.945507][ T1] raid6: neonx1 gen() 3461 MB/s
[ 1.115682][ T1] raid6: int64x8 gen() 4604 MB/s
[ 1.285876][ T1] raid6: int64x4 gen() 4521 MB/s
[ 1.456022][ T1] raid6: int64x2 gen() 2718 MB/s
[ 1.626187][ T1] raid6: int64x1 gen() 1947 MB/s
[ 1.626196][ T1] raid6: using algorithm neonx8 gen() 6167 MB/s
[ 1.796401][ T1] raid6: .... xor() 3991 MB/s, rmw enabled
[ 1.796408][ T1] raid6: using neon recovery algorithm
[ 1.797126][ T1] ACPI: Added _OSI(Module Device)
[ 1.797136][ T1] ACPI: Added _OSI(Processor Device)
[ 1.797145][ T1] ACPI: Added _OSI(3.0 _SCP Extensions)
[ 1.797155][ T1] ACPI: Added _OSI(Processor Aggregator Device)
[ 1.804470][ T1] ACPI: 2 ACPI AML tables successfully acquired and loaded
[ 1.807824][ T1] ACPI: Interpreter enabled
[ 1.807830][ T1] ACPI: Using GIC for interrupt routing
[ 1.807911][ T1] ACPI: MCFG table detected, 1 entries
[ 1.822240][ T1] ARMH0011:00: ttyAMA0 at MMIO 0x9000000 (irq = 12, base_baud = 0) is a SBSA
[ 2.114413][ T1] printk: console [ttyAMA0] enabled
[ 2.118289][ T1] ARMH0011:01: ttyAMA1 at MMIO 0x9001000 (irq = 13, base_baud = 0) is a SBSA
[ 2.122577][ T1] ARMH0011:02: ttyAMA2 at MMIO 0x9002000 (irq = 14, base_baud = 0) is a SBSA
[ 2.126853][ T1] ARMH0011:03: ttyAMA3 at MMIO 0x9003000 (irq = 15, base_baud = 0) is a SBSA
[ 2.131890][ T1] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-0f])
[ 2.133622][ T1] acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI HPX-Type3]
[ 2.136536][ T1] acpi PNP0A08:00: _OSC: platform does not support [LTR]
[ 2.139330][ T1] acpi PNP0A08:00: _OSC: OS now controls [PCIeHotplug PME AER PCIeCapability]
[ 2.142523][ T1] acpi PNP0A08:00: ECAM area [mem 0x3f000000-0x3fffffff] reserved by PNP0C02:00
[ 2.144915][ T1] acpi PNP0A08:00: ECAM at [mem 0x3f000000-0x3fffffff] for [bus 00-0f]
[ 2.146937][ T1] ACPI: Remapped I/O 0x000000003eff0000 to [io 0x0000-0xffff window]
[ 2.149516][ T1] PCI host bridge to bus 0000:00
[ 2.150611][ T1] pci_bus 0000:00: root bus resource [mem 0x10000000-0x3efeffff window]
[ 2.152451][ T1] pci_bus 0000:00: root bus resource [io 0x0000-0xffff window]
[ 2.154158][ T1] pci_bus 0000:00: root bus resource [mem 0x8000000000-0xffffffffff window]
[ 2.156180][ T1] pci_bus 0000:00: root bus resource [bus 00-0f]
[ 2.158027][ T1] pci 0000:00:00.0: [1ae0:0042] type 00 class 0x020000
[ 2.162051][ T1] pci 0000:00:00.0: reg 0x10: [mem 0x10203000-0x10203fff]
[ 2.164772][ T1] pci 0000:00:00.0: reg 0x14: [mem 0x10202000-0x1020203f]
[ 2.167519][ T1] pci 0000:00:00.0: reg 0x18: [mem 0x10100000-0x101fffff]
[ 2.169988][ T1] pci 0000:00:01.0: [1af4:1005] type 00 class 0x00ff00
[ 2.174885][ T1] pci 0000:00:01.0: reg 0x10: [io 0x0000-0x001f]
[ 2.178422][ T1] pci 0000:00:01.0: reg 0x14: [mem 0x10201000-0x1020103f]
[ 2.187023][ T1] pci 0000:00:02.0: [1ae0:001f] type 00 class 0x010802
[ 2.195507][ T1] pci 0000:00:02.0: reg 0x10: [mem 0x10000000-0x10003fff 64bit]
[ 2.201196][ T1] pci 0000:00:02.0: reg 0x20: [mem 0x10200000-0x1020003f]
[ 2.205888][ T1] pci 0000:00:00.0: BAR 2: assigned [mem 0x10000000-0x100fffff]
[ 2.208238][ T1] pci 0000:00:02.0: BAR 0: assigned [mem 0x8000000000-0x8000003fff 64bit]
[ 2.212164][ T1] pci 0000:00:00.0: BAR 0: assigned [mem 0x10100000-0x10100fff]
[ 2.214485][ T1] pci 0000:00:00.0: BAR 1: assigned [mem 0x10101000-0x1010103f]
[ 2.216701][ T1] pci 0000:00:01.0: BAR 1: assigned [mem 0x10101040-0x1010107f]
[ 2.219099][ T1] pci 0000:00:02.0: BAR 4: assigned [mem 0x10101080-0x101010bf]
[ 2.221381][ T1] pci 0000:00:01.0: BAR 0: assigned [io 0x1000-0x101f]
[ 2.223779][ T1] pci_bus 0000:00: resource 4 [mem 0x10000000-0x3efeffff window]
[ 2.225489][ T1] pci_bus 0000:00: resource 5 [io 0x0000-0xffff window]
[ 2.227050][ T1] pci_bus 0000:00: resource 6 [mem 0x8000000000-0xffffffffff window]
[ 2.229280][ T1] ACPI: PCI: Interrupt link GSI0 configured for IRQ 35
[ 2.230931][ T1] ACPI: PCI: Interrupt link GSI1 configured for IRQ 36
[ 2.232544][ T1] ACPI: PCI: Interrupt link GSI2 configured for IRQ 37
[ 2.234175][ T1] ACPI: PCI: Interrupt link GSI3 configured for IRQ 38
[ 2.236654][ T1] iommu: Default domain type: Translated
[ 2.237970][ T1] iommu: DMA domain TLB invalidation policy: strict mode
[ 2.240686][ T1] SCSI subsystem initialized
[ 2.247822][ T1] ACPI: bus type USB registered
[ 2.249117][ T1] usbcore: registered new interface driver usbfs
[ 2.250631][ T1] usbcore: registered new interface driver hub
[ 2.252080][ T1] usbcore: registered new device driver usb
[ 2.253854][ T1] mc: Linux media interface: v0.10
[ 2.255083][ T1] videodev: Linux video capture interface: v2.00
[ 2.256625][ T1] pps_core: LinuxPPS API ver. 1 registered
[ 2.257922][ T1] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@xxxxxxxx>
[ 2.260272][ T1] PTP clock support registered
[ 2.261702][ T1] EDAC MC: Ver: 3.0.0
[ 2.263527][ T1] Registered efivars operations
[ 2.267725][ T1] Advanced Linux Sound Architecture Driver Initialized.
[ 2.275977][ T1] Bluetooth: Core ver 2.22
[ 2.277053][ T1] NET: Registered PF_BLUETOOTH protocol family
[ 2.278430][ T1] Bluetooth: HCI device and connection manager initialized
[ 2.281883][ T1] Bluetooth: HCI socket layer initialized
[ 2.283177][ T1] Bluetooth: L2CAP socket layer initialized
[ 2.284536][ T1] Bluetooth: SCO socket layer initialized
[ 2.285863][ T1] NET: Registered PF_ATMPVC protocol family
[ 2.287177][ T1] NET: Registered PF_ATMSVC protocol family
[ 2.288601][ T1] NetLabel: Initializing
[ 2.289545][ T1] NetLabel: domain hash size = 128
[ 2.290692][ T1] NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO
[ 2.292282][ T1] NetLabel: unlabeled traffic allowed by default
[ 2.294406][ T1] nfc: nfc_init: NFC Core ver 0.1
[ 2.295626][ T1] NET: Registered PF_NFC protocol family
[ 2.297230][ T1] vgaarb: loaded
[ 2.298450][ T1] clocksource: Switched to clocksource arch_sys_counter
[ 2.300886][ T1] VFS: Disk quotas dquot_6.6.0
[ 2.302050][ T1] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ 2.304109][ T1] FS-Cache: Loaded
[ 2.305439][ T1] CacheFiles: Loaded
[ 2.306559][ T1] TOMOYO: 2.6.0
[ 2.307343][ T1] Mandatory Access Control activated.
[ 2.308814][ T1] pnp: PnP ACPI init
[ 2.310414][ T1] system 00:00: [mem 0x3f000000-0x3fffffff window] could not be reserved
[ 2.312652][ T1] pnp: PnP ACPI: found 1 devices
[ 2.328790][ T1] NET: Registered PF_INET protocol family
[ 2.330287][ T1] IP idents hash table entries: 131072 (order: 8, 1048576 bytes, linear)
[ 2.334837][ T1] tcp_listen_portaddr_hash hash table entries: 4096 (order: 6, 294912 bytes, linear)
[ 2.337070][ T1] Table-perturb hash table entries: 65536 (order: 6, 262144 bytes, linear)
[ 2.339191][ T1] TCP established hash table entries: 65536 (order: 7, 524288 bytes, linear)
[ 2.343832][ T1] TCP bind hash table entries: 65536 (order: 11, 9437184 bytes, vmalloc)
[ 2.347508][ T1] TCP: Hash tables configured (established 65536 bind 65536)
[ 2.349781][ T1] MPTCP token hash table entries: 8192 (order: 7, 720896 bytes, linear)
[ 2.352221][ T1] UDP hash table entries: 4096 (order: 7, 655360 bytes, linear)
[ 2.354420][ T1] UDP-Lite hash table entries: 4096 (order: 7, 655360 bytes, linear)
[ 2.356557][ T1] NET: Registered PF_UNIX/PF_LOCAL protocol family
[ 2.358770][ T1] RPC: Registered named UNIX socket transport module.
[ 2.360302][ T1] RPC: Registered udp transport module.
[ 2.361528][ T1] RPC: Registered tcp transport module.
[ 2.362754][ T1] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 2.365056][ T1] NET: Registered PF_XDP protocol family
[ 2.366399][ T1] PCI: CLS 0 bytes, default 64
[ 2.367541][ T1] ACPI: bus type thunderbolt registered
[ 2.369586][ T1] kvm [1]: HYP mode not available
[ 2.372486][ T54] ------------[ cut here ]------------
[ 2.373725][ T54] kernel BUG at mm/mmap.c:3113!
[ 2.374836][ T54] Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
[ 2.376532][ T54] Modules linked in:
[ 2.377394][ T54] CPU: 1 PID: 54 Comm: kworker/u4:1 Not tainted 6.1.0-rc2-syzkaller-dirty #0
[ 2.378680][ T56] ------------[ cut here ]------------
[ 2.379407][ T54] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
[ 2.380637][ T56] kernel BUG at mm/mmap.c:3113!
[ 2.383014][ T54] pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 2.385925][ T54] pc : exit_mmap+0x384/0x3b8
[ 2.386997][ T54] lr : exit_mmap+0x384/0x3b8
[ 2.388046][ T54] sp : ffff80000f743c80
[ 2.388995][ T54] x29: ffff80000f743d50 x28: 0000000000000008 x27: 0000000000000000
[ 2.390858][ T54] x26: ffff0000c0e6cec0 x25: 0000000000000000 x24: ffff80000cbe686a
[ 2.392727][ T54] x23: 00000000fffffffe x22: 0000000000000001 x21: 0000000000000000
[ 2.394598][ T54] x20: ffff0000c0e140d8 x19: ffff0000c0e14000 x18: 00000000000000c0
[ 2.396453][ T54] x17: ffff80000dda9198 x16: 0000000000000000 x15: 0000000000000000
[ 2.398296][ T54] x14: 0000000000000000 x13: 0000000000000002 x12: ffff80000d93a6a8
[ 2.400164][ T54] x11: ff80800008497ac4 x10: 0000000000000000 x9 : ffff800008497ac4
[ 2.402002][ T54] x8 : ffff0000c0e6cec0 x7 : ffff8000084c08bc x6 : 0000000000000000
[ 2.403846][ T54] x5 : ffff80000dff9ad0 x4 : 0000000000000000 x3 : 0000000000000000
[ 2.405671][ T54] x2 : ffffffffffffffff x1 : 0000000000000001 x0 : 0000000000000000
[ 2.407536][ T54] Call trace:
[ 2.408290][ T54] exit_mmap+0x384/0x3b8
[ 2.409269][ T54] __mmput+0x90/0x204
[ 2.410190][ T54] mmput+0x64/0xa0
[ 2.411070][ T54] free_bprm+0xac/0x19c
[ 2.412027][ T54] kernel_execve+0x4ec/0x540
[ 2.413089][ T54] call_usermodehelper_exec_async+0x10c/0x214
[ 2.414481][ T54] ret_from_fork+0x10/0x20
[ 2.415496][ T54] Code: aa1303e0 97ff561d 17ffff64 97f83d94 (d4210000)
[ 2.417094][ T54] ---[ end trace 0000000000000000 ]---
[ 2.418343][ T54] Kernel panic - not syncing: Oops - BUG: Fatal exception
[ 2.420007][ T54] SMP: stopping secondary CPUs
[ 3.500390][ T54] SMP: failed to stop secondary CPUs 0-1
[ 3.501773][ T54] Kernel Offset: disabled
[ 3.502802][ T54] CPU features: 0x00000,02070084,26017203
[ 3.504126][ T54] Memory Limit: none
[ 3.505051][ T54] Rebooting in 86400 seconds..
syzkaller build log:
go env (err=<nil>)
GO111MODULE="auto"
GOARCH="amd64"
GOBIN=""
GOCACHE="/syzkaller/.cache/go-build"
GOENV="/syzkaller/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/syzkaller/jobs/linux/gopath/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/syzkaller/jobs/linux/gopath"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct";
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.17"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build4137696923=/tmp/go-build -gno-record-gcc-switches"
git status (err=<nil>)
HEAD detached at 1dac8c7a0
nothing to commit, working tree clean
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:32: run command via tools/syz-env for best compatibility, see:
Makefile:33: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=arm64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=1dac8c7a01e2bdd35cb04eb4901ddb157291ac2d -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230103-123455'" "-tags=syz_target syz_os_linux syz_arch_arm64 " -o ./bin/linux_arm64/syz-fuzzer github.com/google/syzkaller/syz-fuzzer
GOOS=linux GOARCH=arm64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=1dac8c7a01e2bdd35cb04eb4901ddb157291ac2d -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230103-123455'" "-tags=syz_target syz_os_linux syz_arch_arm64 " -o ./bin/linux_arm64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
GOOS=linux GOARCH=arm64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=1dac8c7a01e2bdd35cb04eb4901ddb157291ac2d -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230103-123455'" "-tags=syz_target syz_os_linux syz_arch_arm64 " -o ./bin/linux_arm64/syz-stress github.com/google/syzkaller/tools/syz-stress
mkdir -p ./bin/linux_arm64
aarch64-linux-gnu-gcc -o ./bin/linux_arm64/syz-executor executor/executor.cc \
-O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -static-pie -fpermissive -w -DGOOS_linux=1 -DGOARCH_arm64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"1dac8c7a01e2bdd35cb04eb4901ddb157291ac2d\"
Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=14f971d6480000
Tested on:
commit: 247f34f7 Linux 6.1-rc2
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
kernel config: https://syzkaller.appspot.com/x/.config?x=fa9bed8d6a8992a0
dashboard link: https://syzkaller.appspot.com/bug?extid=ea8b28e8dca42fc3bcbe
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
patch: https://syzkaller.appspot.com/x/patch.diff?x=10ccfc6c480000