SYZFAIL: failed to recv rpc

SYZFAIL: failed to recv rpc
fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor)


Warning: Permanently added '10.128.1.193' (ED25519) to the list of known hosts.
2026/01/09 21:40:00 parsed 1 programs
[   74.676996][ T5818] cgroup: Unknown subsys name 'net'
[   74.855424][ T5818] cgroup: Unknown subsys name 'cpuset'
[   74.863782][ T5818] cgroup: Unknown subsys name 'rlimit'
[   74.869502][ T5818] cgroup: Unknown subsys name 'memory'
Setting up swapspace version 1, size = 127995904 bytes
[   76.208492][ T5818] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[   78.929418][ T1098] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   78.955204][ T1098] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   78.983326][   T50] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   78.991983][   T50] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   79.389753][ T5139] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   79.400052][ T5139] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   79.417604][ T5139] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   79.438405][ T5139] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   79.447052][ T5139] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   80.899899][ T5866] chnl_net:caif_netlink_parms(): no params data found
[   81.579438][ T5866] bridge0: port 1(bridge_slave_0) entered blocking state
[   81.588094][ T5866] bridge0: port 1(bridge_slave_0) entered disabled state
[   81.596333][ T5866] bridge_slave_0: entered allmulticast mode
[   81.603807][ T5866] bridge_slave_0: entered promiscuous mode
[   81.621918][ T5866] bridge0: port 2(bridge_slave_1) entered blocking state
[   81.629402][ T5866] bridge0: port 2(bridge_slave_1) entered disabled state
[   81.637940][ T5866] bridge_slave_1: entered allmulticast mode
[   81.645377][ T5866] bridge_slave_1: entered promiscuous mode
[   81.693260][ T5866] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   81.718419][ T5866] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   81.866169][ T5866] team0: Port device team_slave_0 added
[   81.904137][ T5866] team0: Port device team_slave_1 added
[   82.126171][ T5866] batman_adv: batadv0: Adding interface: batadv_slave_0
[   82.133656][ T5866] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[   82.162192][ T5866] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   82.179958][ T5866] batman_adv: batadv0: Adding interface: batadv_slave_1
[   82.187655][ T5866] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[   82.214771][ T5866] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   82.335257][ T5866] hsr_slave_0: entered promiscuous mode
[   82.349745][ T5866] hsr_slave_1: entered promiscuous mode
[   82.491299][ T5866] netdevsim netdevsim1 netdevsim0: renamed from eth0
[   82.503668][ T5866] netdevsim netdevsim1 netdevsim1: renamed from eth1
[   82.514482][ T5866] netdevsim netdevsim1 netdevsim2: renamed from eth2
[   82.525243][ T5866] netdevsim netdevsim1 netdevsim3: renamed from eth3
[   82.597124][ T5866] 8021q: adding VLAN 0 to HW filter on device bond0
[   82.617562][ T5866] 8021q: adding VLAN 0 to HW filter on device team0
[   82.629281][ T1098] bridge0: port 1(bridge_slave_0) entered blocking state
[   82.636789][ T1098] bridge0: port 1(bridge_slave_0) entered forwarding state
[   82.652080][   T60] bridge0: port 2(bridge_slave_1) entered blocking state
[   82.659620][   T60] bridge0: port 2(bridge_slave_1) entered forwarding state
[   82.811864][ T5866] 8021q: adding VLAN 0 to HW filter on device batadv0
[   82.850260][ T5866] veth0_vlan: entered promiscuous mode
[   82.861760][ T5866] veth1_vlan: entered promiscuous mode
[   82.889605][ T5866] veth0_macvtap: entered promiscuous mode
[   82.899365][ T5866] veth1_macvtap: entered promiscuous mode
[   82.916827][ T5866] batman_adv: batadv0: Interface activated: batadv_slave_0
[   82.931150][ T5866] batman_adv: batadv0: Interface activated: batadv_slave_1
[   82.946799][   T60] netdevsim netdevsim1 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[   82.956908][   T60] netdevsim netdevsim1 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[   82.966442][   T60] netdevsim netdevsim1 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[   82.976197][   T60] netdevsim netdevsim1 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
2026/01/09 21:40:10 executed programs: 0
[   83.117686][ T5139] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   83.128445][ T5139] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   83.137861][ T5139] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   83.151877][ T5139] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   83.160329][ T5139] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   83.335409][ T5928] chnl_net:caif_netlink_parms(): no params data found
[   83.408911][ T5928] bridge0: port 1(bridge_slave_0) entered blocking state
[   83.416799][ T5928] bridge0: port 1(bridge_slave_0) entered disabled state
[   83.424282][ T5928] bridge_slave_0: entered allmulticast mode
[   83.431837][ T5928] bridge_slave_0: entered promiscuous mode
[   83.439873][ T5928] bridge0: port 2(bridge_slave_1) entered blocking state
[   83.448564][ T5928] bridge0: port 2(bridge_slave_1) entered disabled state
[   83.455988][ T5928] bridge_slave_1: entered allmulticast mode
[   83.463310][ T5928] bridge_slave_1: entered promiscuous mode
[   83.492587][ T5928] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   83.504571][ T5928] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   83.535399][ T5928] team0: Port device team_slave_0 added
[   83.543732][ T5928] team0: Port device team_slave_1 added
[   83.568206][ T5928] batman_adv: batadv0: Adding interface: batadv_slave_0
[   83.576254][ T5928] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[   83.605684][ T5928] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   83.619123][ T5928] batman_adv: batadv0: Adding interface: batadv_slave_1
[   83.626896][ T5928] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[   83.653949][ T5928] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   83.698326][ T5928] hsr_slave_0: entered promiscuous mode
[   83.705491][ T5928] hsr_slave_1: entered promiscuous mode
[   83.711930][ T5928] debugfs: 'hsr0' already exists in 'hsr'
[   83.717996][ T5928] Cannot create hsr debugfs directory
[   83.851718][ T5928] netdevsim netdevsim0 netdevsim0: renamed from eth0
[   83.863665][ T5928] netdevsim netdevsim0 netdevsim1: renamed from eth1
[   83.876055][ T5928] netdevsim netdevsim0 netdevsim2: renamed from eth2
[   83.886674][ T5928] netdevsim netdevsim0 netdevsim3: renamed from eth3
[   83.915886][ T5928] bridge0: port 2(bridge_slave_1) entered blocking state
[   83.923315][ T5928] bridge0: port 2(bridge_slave_1) entered forwarding state
[   83.931622][ T5928] bridge0: port 1(bridge_slave_0) entered blocking state
[   83.939164][ T5928] bridge0: port 1(bridge_slave_0) entered forwarding state
[   83.997777][ T5928] 8021q: adding VLAN 0 to HW filter on device bond0
[   84.019725][ T1098] bridge0: port 1(bridge_slave_0) entered disabled state
[   84.028115][ T1098] bridge0: port 2(bridge_slave_1) entered disabled state
[   84.045367][ T5928] 8021q: adding VLAN 0 to HW filter on device team0
[   84.060794][ T3473] bridge0: port 1(bridge_slave_0) entered blocking state
[   84.068045][ T3473] bridge0: port 1(bridge_slave_0) entered forwarding state
[   84.080391][ T1098] bridge0: port 2(bridge_slave_1) entered blocking state
[   84.087687][ T1098] bridge0: port 2(bridge_slave_1) entered forwarding state
[   84.239263][ T5928] 8021q: adding VLAN 0 to HW filter on device batadv0
[   84.279285][ T5928] veth0_vlan: entered promiscuous mode
[   84.289847][ T5928] veth1_vlan: entered promiscuous mode
[   84.318247][ T5928] veth0_macvtap: entered promiscuous mode
[   84.330214][ T5928] veth1_macvtap: entered promiscuous mode
[   84.348210][ T5928] batman_adv: batadv0: Interface activated: batadv_slave_0
[   84.365020][ T5928] batman_adv: batadv0: Interface activated: batadv_slave_1
[   84.380855][ T1098] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[   84.391414][ T1098] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[   84.401926][ T1098] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[   84.413451][ T1098] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[   84.477325][ T1098] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   84.493568][ T1098] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   84.527614][   T13] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   84.535944][   T13] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
SYZFAIL: failed to recv rpc
fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor)
[   85.004067][   T50] netdevsim netdevsim1 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0


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-build186860134=/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 280ea308c3
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=280ea308c321115445df610f1a75b05bbadca5f3 -X github.com/google/syzkaller/prog.gitRevisionDate=20251120-101005"  ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=280ea308c321115445df610f1a75b05bbadca5f3 -X github.com/google/syzkaller/prog.gitRevisionDate=20251120-101005"  ./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=amd64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=280ea308c321115445df610f1a75b05bbadca5f3 -X github.com/google/syzkaller/prog.gitRevisionDate=20251120-101005"  -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_amd64
g++ -o ./bin/linux_amd64/syz-executor executor/executor.cc \
	-m64 -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_amd64=1 \
	-DHOSTGOOS_linux=1 -DGIT_REVISION=\"280ea308c321115445df610f1a75b05bbadca5f3\"
/usr/bin/ld: /tmp/ccQgasZs.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x104): 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