Re: [syzbot] [net?] INFO: task hung in new_device_store (5)

[syzbot <syzbot+05f9cecd28e356241aba@syzkaller.appspotmail.com>]

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