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Message-ID: <695299ca.050a0220.329c0f.041a.GAE@google.com>
Date: Mon, 29 Dec 2025 07:10:02 -0800
From: syzbot <syzbot+05f9cecd28e356241aba@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, penguin-kernel@...ove.sakura.ne.jp,
syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [net?] INFO: task hung in new_device_store (5)
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
a
[ 4.120562][ T1] usbcore: registered new interface driver usbhid
[ 4.121529][ T1] usbhid: USB HID core driver
[ 4.124225][ T1] usbcore: registered new interface driver es2_ap_driver
[ 4.125241][ T1] comedi: version 0.7.76 - http://www.comedi.org
[ 4.127010][ T1] comedi comedi0: comedi_test: 1000000 microvolt, 100000 microsecond waveform attached
[ 4.134045][ T1] comedi comedi0: driver 'comedi_test' has successfully auto-configured 'comedi_test'.
[ 4.136499][ T1] usbcore: registered new interface driver dt9812
[ 4.137832][ T1] usbcore: registered new interface driver ni6501
[ 4.138039][ T1] usbcore: registered new interface driver usbdux
[ 4.138282][ T1] usbcore: registered new interface driver usbduxfast
[ 4.138471][ T1] usbcore: registered new interface driver usbduxsigma
[ 4.138653][ T1] usbcore: registered new interface driver vmk80xx
[ 4.139062][ T1] greybus: registered new driver hid
[ 4.139316][ T1] greybus: registered new driver gbphy
[ 4.139447][ T1] gb_gbphy: registered new driver usb
[ 4.139453][ T1] Driver 'bcm2835-audio' was unable to register with bus_type 'vchiq-bus' because the bus was not initialized.
[ 4.156997][ T1] SPI driver st-magn-spi has no spi_device_id for st,lis3mdl-magn
[ 4.157026][ T1] SPI driver st-magn-spi has no spi_device_id for st,lsm303agr-magn
[ 4.157033][ T1] SPI driver st-magn-spi has no spi_device_id for st,lsm9ds1-magn
[ 4.157037][ T1] SPI driver st-magn-spi has no spi_device_id for st,lsm303c-magn
[ 4.162014][ T1] No ACPI PMU IRQ for CPU0
[ 4.162599][ T1] No ACPI PMU IRQ for CPU1
[ 4.165169][ T1] cs_system_cfg: CoreSight Configuration manager initialised
[ 4.172887][ T1] gnss: GNSS driver registered with major 480
[ 4.174764][ T1] usbcore: registered new interface driver gnss-usb
[ 4.179308][ T1] usbcore: registered new interface driver hdm_usb
[ 4.209551][ T1] usbcore: registered new interface driver snd-usb-audio
[ 4.210933][ T1] usbcore: registered new interface driver snd-ua101
[ 4.212173][ T1] usbcore: registered new interface driver snd-usb-caiaq
[ 4.213547][ T1] usbcore: registered new interface driver snd-usb-6fire
[ 4.214831][ T1] usbcore: registered new interface driver snd-usb-hiface
[ 4.216078][ T1] usbcore: registered new interface driver snd-bcd2000
[ 4.217398][ T1] usbcore: registered new interface driver snd_usb_pod
[ 4.218695][ T1] usbcore: registered new interface driver snd_usb_podhd
[ 4.220024][ T1] usbcore: registered new interface driver snd_usb_toneport
[ 4.221390][ T1] usbcore: registered new interface driver snd_usb_variax
[ 4.246436][ T1] NET: Registered PF_LLC protocol family
[ 4.248560][ T1] GACT probability on
[ 4.249222][ T1] Mirror/redirect action on
[ 4.250037][ T1] Simple TC action Loaded
[ 4.252240][ T1] netem: version 1.3
[ 4.252980][ T1] u32 classifier
[ 4.253525][ T1] Performance counters on
[ 4.254239][ T1] input device check on
[ 4.254951][ T1] Actions configured
[ 4.259129][ T1] xt_time: kernel timezone is -0000
[ 4.260259][ T1] IPVS: Registered protocols (TCP, UDP, SCTP, AH, ESP)
[ 4.261273][ T1] IPVS: Connection hash table configured (size=4096, memory=32Kbytes)
[ 4.262778][ T1] IPVS: ipvs loaded.
[ 4.263397][ T1] IPVS: [rr] scheduler registered.
[ 4.264148][ T1] IPVS: [wrr] scheduler registered.
[ 4.264909][ T1] IPVS: [lc] scheduler registered.
[ 4.265669][ T1] IPVS: [wlc] scheduler registered.
[ 4.266440][ T1] IPVS: [fo] scheduler registered.
[ 4.269245][ T1] IPVS: [ovf] scheduler registered.
[ 4.270028][ T1] IPVS: [lblc] scheduler registered.
[ 4.270824][ T1] IPVS: [lblcr] scheduler registered.
[ 4.271601][ T1] IPVS: [dh] scheduler registered.
[ 4.272343][ T1] IPVS: [sh] scheduler registered.
[ 4.273090][ T1] IPVS: [mh] scheduler registered.
[ 4.273841][ T1] IPVS: [sed] scheduler registered.
[ 4.274591][ T1] IPVS: [nq] scheduler registered.
[ 4.275330][ T1] IPVS: [twos] scheduler registered.
[ 4.276219][ T1] IPVS: [sip] pe registered.
[ 4.276982][ T1] ipip: IPv4 and MPLS over IPv4 tunneling driver
[ 4.279537][ T1] gre: GRE over IPv4 demultiplexer driver
[ 4.280435][ T1] ip_gre: GRE over IPv4 tunneling driver
[ 4.284631][ T1] IPv4 over IPsec tunneling driver
[ 4.287162][ T1] Initializing XFRM netlink socket
[ 4.288053][ T1] IPsec XFRM device driver
[ 4.288955][ T1] NET: Registered PF_INET6 protocol family
[ 4.313437][ T1] Segment Routing with IPv6
[ 4.313461][ T1] RPL Segment Routing with IPv6
[ 4.313550][ T1] In-situ OAM (IOAM) with IPv6
[ 4.313665][ T1] mip6: Mobile IPv6
[ 4.315144][ T1] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
[ 4.318091][ T1] ip6_gre: GRE over IPv6 tunneling driver
[ 4.319618][ T1] NET: Registered PF_PACKET protocol family
[ 4.319641][ T1] PFKEY is deprecated and scheduled to be removed in 2027, please contact the netdev mailing list
[ 4.319667][ T1] NET: Registered PF_KEY protocol family
[ 4.319842][ T1] Bridge firewalling registered
[ 4.330815][ T1] NET: Registered PF_X25 protocol family
[ 4.330889][ T1] X25: Linux Version 0.2
[ 4.335006][ T1] NET: Registered PF_NETROM protocol family
[ 4.345214][ T1] NET: Registered PF_ROSE protocol family
[ 4.345342][ T1] NET: Registered PF_AX25 protocol family
[ 4.345374][ T1] can: controller area network core
[ 4.345486][ T1] NET: Registered PF_CAN protocol family
[ 4.345492][ T1] can: raw protocol
[ 4.345516][ T1] can: broadcast manager protocol
[ 4.345530][ T1] can: netlink gateway - max_hops=1
[ 4.345564][ T1] can: SAE J1939
[ 4.345575][ T1] can: isotp protocol (max_pdu_size 8300)
[ 4.346327][ T1] Bluetooth: RFCOMM TTY layer initialized
[ 4.346338][ T1] Bluetooth: RFCOMM socket layer initialized
[ 4.346376][ T1] Bluetooth: RFCOMM ver 1.11
[ 4.346399][ T1] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 4.346403][ T1] Bluetooth: BNEP filters: protocol multicast
[ 4.346412][ T1] Bluetooth: BNEP socket layer initialized
[ 4.346416][ T1] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
[ 4.346424][ T1] Bluetooth: HIDP socket layer initialized
[ 4.359008][ T1] NET: Registered PF_RXRPC protocol family
[ 4.359032][ T1] Key type rxrpc registered
[ 4.359037][ T1] Key type rxrpc_s registered
[ 4.370108][ T1] NET: Registered PF_KCM protocol family
[ 4.381241][ T1] lec:lane_module_init: lec.c: initialized
[ 4.381257][ T1] mpoa:atm_mpoa_init: mpc.c: initialized
[ 4.381329][ T1] l2tp_core: L2TP core driver, V2.0
[ 4.381344][ T1] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[ 4.381349][ T1] l2tp_ip: L2TP IP encapsulation support (L2TPv3)
[ 4.381394][ T1] l2tp_netlink: L2TP netlink interface
[ 4.381490][ T1] l2tp_eth: L2TP ethernet pseudowire support (L2TPv3)
[ 4.381494][ T1] l2tp_ip6: L2TP IP encapsulation support for IPv6 (L2TPv3)
[ 4.381571][ T1] NET: Registered PF_PHONET protocol family
[ 4.381648][ T1] 8021q: 802.1Q VLAN Support v1.8
[ 4.381762][ T1] sctp: Hash tables configured (bind 32/56)
[ 4.393148][ T1] NET: Registered PF_RDS protocol family
[ 4.403453][ T1] Registered RDS/infiniband transport
[ 4.403821][ T1] Registered RDS/tcp transport
[ 4.403830][ T1] tipc: Activated (version 2.0.0)
[ 4.404053][ T1] NET: Registered PF_TIPC protocol family
[ 4.404399][ T1] tipc: Started in single node mode
[ 4.414974][ T1] smc: adding smcd device lo without pnetid
[ 4.415301][ T1] NET: Registered PF_SMC protocol family
[ 4.416237][ T1] 9pnet: Installing 9P2000 support
[ 4.416447][ T1] NET: Registered PF_CAIF protocol family
[ 4.419368][ T1] NET: Registered PF_IEEE802154 protocol family
[ 4.419507][ T1] Key type dns_resolver registered
[ 4.419545][ T1] Key type ceph registered
[ 4.429787][ T1] libceph: loaded (mon/osd proto 15/24)
[ 4.440408][ T1] batman_adv: B.A.T.M.A.N. advanced 2025.5 (compatibility version 15) loaded
[ 4.440508][ T1] openvswitch: Open vSwitch switching datapath
[ 4.442501][ T1] NET: Registered PF_VSOCK protocol family
[ 4.442637][ T1] mpls_gso: MPLS GSO support
[ 4.822713][ T1] registered taskstats version 1
[ 4.822898][ T1] Loading compiled-in X.509 certificates
[ 4.832493][ T1] Loaded X.509 cert 'Build time autogenerated kernel key: 811f05b8217b01507947d03032dd71bd9ac93532'
[ 4.953881][ T1] zswap: loaded using pool 842
[ 4.955557][ T1] Demotion targets for Node 0: null
[ 4.955597][ T1] debug_vm_pgtable: [debug_vm_pgtable ]: Validating architecture page table helpers
[ 4.956478][ T1] page_owner is disabled
[ 4.956892][ T1] Key type .fscrypt registered
[ 4.956897][ T1] Key type fscrypt-provisioning registered
[ 4.958198][ T1] kAFS: Red Hat AFS client v0.1 registering.
[ 4.967262][ T1] Btrfs loaded, assert=on, zoned=yes, fsverity=yes
[ 4.967540][ T1] Key type big_key registered
[ 4.967567][ T1] Key type encrypted registered
[ 4.967589][ T1] ima: No TPM chip found, activating TPM-bypass!
[ 4.967606][ T1] Loading compiled-in module X.509 certificates
[ 4.975004][ T1] Loaded X.509 cert 'Build time autogenerated kernel key: 811f05b8217b01507947d03032dd71bd9ac93532'
[ 4.975026][ T1] ima: Allocated hash algorithm: sha256
[ 4.975115][ T1] ima: No architecture policies found
[ 4.975292][ T1] evm: Initialising EVM extended attributes:
[ 4.975295][ T1] evm: security.selinux (disabled)
[ 4.975298][ T1] evm: security.SMACK64
[ 4.975301][ T1] evm: security.SMACK64EXEC
[ 4.975303][ T1] evm: security.SMACK64TRANSMUTE
[ 4.975306][ T1] evm: security.SMACK64MMAP
[ 4.975309][ T1] evm: security.apparmor (disabled)
[ 4.975311][ T1] evm: security.ima
[ 4.975314][ T1] evm: security.capability
[ 4.975316][ T1] evm: HMAC attrs: 0x1
[ 4.977446][ T1] netconsole: network logging started
[ 4.977752][ T1] gtp: GTP module loaded (pdp ctx size 128 bytes)
[ 4.980673][ T1] rdma_rxe: loaded
[ 4.981002][ T1] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[ 4.982330][ T1] Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[ 4.982751][ T1] Loaded X.509 cert 'wens: 61c038651aabdcf94bd0ac7ff06c7248db18c600'
[ 4.983244][ T2357] faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2
[ 4.983254][ T2357] faux_driver regulatory: Falling back to sysfs fallback for: regulatory.db
[ 4.983868][ T1] clk: Disabling unused clocks
[ 4.983891][ T1] PM: genpd: Disabling unused power domains
[ 4.983909][ T1] ALSA device list:
[ 4.983914][ T1] #0: Dummy 1
[ 4.983919][ T1] #1: Loopback 1
[ 4.983924][ T1] #2: Virtual MIDI Card 1
[ 4.988889][ T1] check access for rdinit=/init failed: -2, ignoring
[ 4.988904][ T1] md: Skipping autodetection of RAID arrays. (raid=autodetect will force)
[ 5.031288][ T1] EXT4-fs (nvme0n1p2): orphan cleanup on readonly fs
[ 5.032013][ T1] EXT4-fs (nvme0n1p2): mounted filesystem f6b31226-d4d2-43c8-8f9b-5c8c4754e6f3 ro with ordered data mode. Quota mode: none.
[ 5.032125][ T1] VFS: Mounted root (ext4 filesystem) readonly on device 259:2.
[ 5.032915][ T1] devtmpfs: mounted
[ 5.036012][ T1] Freeing unused kernel memory: 4608K
[ 5.036341][ T1] Run /sbin/init as init process
[ 5.128162][ T6179] EXT4-fs (nvme0n1p2): re-mounted f6b31226-d4d2-43c8-8f9b-5c8c4754e6f3 r/w.
mount: mounting devtmpfs on /dev failed: Device or resource busy
mount: mounting selinuxfs on /sys/fs/selinux failed: No such file or directory
Starting syslogd: OK
Starting klogd: OK
Running sysctl: OK
Populating /dev using udev: [ 5.511544][ T6210] udevd[6210]: starting version 3.2.14
[ 5.542428][ T6211] udevd[6211]: starting eudev-3.2.14
done
Starting network: OK
Starting dhcpcd...
dhcpcd-10.2.0 starting
dev: loaded udev
no interfaces have a carrier
[ 10.409439][ T6266] 8021q: adding VLAN 0 to HW filter on device bond0
[ 10.412537][ T6266] eql: remember to turn off Van-Jacobson compression on your slave devices
Starting crond: OK
Starting sshd: OK
syzkaller
syzkaller login: [ 69.619848][ T2357] cfg80211: failed to load regulatory.db
syzkaller build log:
go env (err=<nil>)
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE='auto'
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build1943484986=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOMODCACHE='/syzkaller/jobs-2/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs-2/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTELEMETRY='local'
GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.24.4'
GOWORK=''
PKG_CONFIG='pkg-config'
git status (err=<nil>)
HEAD detached at d6526ea3e
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:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d6526ea3e6ad9081c902859bbb80f9f840377cb4 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-113115" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d6526ea3e6ad9081c902859bbb80f9f840377cb4 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-113115" ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=arm64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d6526ea3e6ad9081c902859bbb80f9f840377cb4 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-113115" -o ./bin/linux_arm64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_arm64
aarch64-linux-gnu-g++ -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 -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -std=c++17 -I. -Iexecutor/_include -DGOOS_linux=1 -DGOARCH_arm64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"d6526ea3e6ad9081c902859bbb80f9f840377cb4\"
/usr/lib/gcc-cross/aarch64-linux-gnu/12/../../../../aarch64-linux-gnu/bin/ld: /tmp/ccokLx97.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0xd8): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
./tools/check-syzos.sh 2>/dev/null
Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=1596fc9a580000
Tested on:
commit: 8f0b4cce Linux 6.19-rc1
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
kernel config: https://syzkaller.appspot.com/x/.config?x=8a8594efdc14f07a
dashboard link: https://syzkaller.appspot.com/bug?extid=05f9cecd28e356241aba
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
userspace arch: arm64
patch: https://syzkaller.appspot.com/x/patch.diff?x=1233349a580000
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