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 '10.128.0.128' (ED25519) to the list of known hosts.
2026/01/26 00:34:56 parsed 1 programs
[   73.948930][ T5827] cgroup: Unknown subsys name 'net'
[   74.074824][ T5827] cgroup: Unknown subsys name 'cpuset'
[   74.083658][ T5827] cgroup: Unknown subsys name 'rlimit'
Setting up swapspace version 1, size = 127995904 bytes
[   75.519495][ T5827] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[   78.368457][ T5841] soft_limit_in_bytes is deprecated and will be removed. Please report your usecase to linux-mm@kvack.org if you depend on this functionality.
[   79.091128][ T5873] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   79.109545][ T5873] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   79.117960][ T5873] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   79.126505][ T5873] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   79.143492][ T5873] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   80.312358][ T1163] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   80.323787][ T1163] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   80.452010][ T1163] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   80.462053][ T1163] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   81.183954][ T5897] chnl_net:caif_netlink_parms(): no params data found
[   81.398895][ T5897] bridge0: port 1(bridge_slave_0) entered blocking state
[   81.407246][ T5897] bridge0: port 1(bridge_slave_0) entered disabled state
[   81.414844][ T5897] bridge_slave_0: entered allmulticast mode
[   81.423288][ T5897] bridge_slave_0: entered promiscuous mode
[   81.434053][ T5897] bridge0: port 2(bridge_slave_1) entered blocking state
[   81.441409][ T5897] bridge0: port 2(bridge_slave_1) entered disabled state
[   81.449855][ T5897] bridge_slave_1: entered allmulticast mode
[   81.457567][ T5897] bridge_slave_1: entered promiscuous mode
[   81.492140][ T5897] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   81.504772][ T5897] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   81.544079][ T5897] team0: Port device team_slave_0 added
[   81.556661][ T5897] team0: Port device team_slave_1 added
[   81.593668][ T5897] batman_adv: batadv0: Adding interface: batadv_slave_0
[   81.600876][ T5897] 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.
[   81.628811][ T5897] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   81.642583][ T5897] batman_adv: batadv0: Adding interface: batadv_slave_1
[   81.650484][ T5897] 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.
[   81.677630][ T5897] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   81.718460][ T5897] hsr_slave_0: entered promiscuous mode
[   81.725791][ T5897] hsr_slave_1: entered promiscuous mode
[   81.942825][ T5897] netdevsim netdevsim1 netdevsim0: renamed from eth0
[   81.958747][ T5897] netdevsim netdevsim1 netdevsim1: renamed from eth1
[   81.971212][ T5897] netdevsim netdevsim1 netdevsim2: renamed from eth2
[   81.995466][ T5897] netdevsim netdevsim1 netdevsim3: renamed from eth3
[   82.024371][ T5897] bridge0: port 2(bridge_slave_1) entered blocking state
[   82.031719][ T5897] bridge0: port 2(bridge_slave_1) entered forwarding state
[   82.040230][ T5897] bridge0: port 1(bridge_slave_0) entered blocking state
[   82.047976][ T5897] bridge0: port 1(bridge_slave_0) entered forwarding state
[   82.100684][ T5897] 8021q: adding VLAN 0 to HW filter on device bond0
[   82.120208][   T77] bridge0: port 1(bridge_slave_0) entered disabled state
[   82.129805][   T77] bridge0: port 2(bridge_slave_1) entered disabled state
[   82.146850][ T5897] 8021q: adding VLAN 0 to HW filter on device team0
[   82.161141][ T1163] bridge0: port 1(bridge_slave_0) entered blocking state
[   82.168992][ T1163] bridge0: port 1(bridge_slave_0) entered forwarding state
[   82.183386][   T77] bridge0: port 2(bridge_slave_1) entered blocking state
[   82.190960][   T77] bridge0: port 2(bridge_slave_1) entered forwarding state
[   82.344083][ T5897] 8021q: adding VLAN 0 to HW filter on device batadv0
[   82.382662][ T5897] veth0_vlan: entered promiscuous mode
[   82.395691][ T5897] veth1_vlan: entered promiscuous mode
[   82.423431][ T5897] veth0_macvtap: entered promiscuous mode
[   82.433800][ T5897] veth1_macvtap: entered promiscuous mode
[   82.451435][ T5897] batman_adv: batadv0: Interface activated: batadv_slave_0
[   82.466921][ T5897] batman_adv: batadv0: Interface activated: batadv_slave_1
[   82.480967][ T1163] netdevsim netdevsim1 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[   82.492727][ T1163] netdevsim netdevsim1 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[   82.505232][ T1163] netdevsim netdevsim1 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[   82.515131][ T1163] netdevsim netdevsim1 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
2026/01/26 00:35:07 executed programs: 0
[   82.665482][ T5873] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   82.674307][ T5873] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   82.688549][ T5873] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   82.696752][ T5873] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   82.705953][ T5873] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   82.880394][ T5937] chnl_net:caif_netlink_parms(): no params data found
[   82.947469][ T5937] bridge0: port 1(bridge_slave_0) entered blocking state
[   82.955315][ T5937] bridge0: port 1(bridge_slave_0) entered disabled state
[   82.963186][ T5937] bridge_slave_0: entered allmulticast mode
[   82.970428][ T5937] bridge_slave_0: entered promiscuous mode
[   82.979151][ T5937] bridge0: port 2(bridge_slave_1) entered blocking state
[   82.986811][ T5937] bridge0: port 2(bridge_slave_1) entered disabled state
[   82.994260][ T5937] bridge_slave_1: entered allmulticast mode
[   83.001209][ T5937] bridge_slave_1: entered promiscuous mode
[   83.032329][ T5937] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   83.044177][ T5937] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   83.075414][ T5937] team0: Port device team_slave_0 added
[   83.084819][ T5937] team0: Port device team_slave_1 added
[   83.114175][ T5937] batman_adv: batadv0: Adding interface: batadv_slave_0
[   83.122057][ T5937] 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.
[   83.152279][ T5937] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   83.165556][ T5937] batman_adv: batadv0: Adding interface: batadv_slave_1
[   83.172743][ T5937] 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.
[   83.200629][ T5937] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   83.252493][ T5937] hsr_slave_0: entered promiscuous mode
[   83.260045][ T5937] hsr_slave_1: entered promiscuous mode
[   83.267522][ T5937] debugfs: 'hsr0' already exists in 'hsr'
[   83.273968][ T5937] Cannot create hsr debugfs directory
[   83.415408][ T5937] netdevsim netdevsim0 netdevsim0: renamed from eth0
[   83.428477][ T5937] netdevsim netdevsim0 netdevsim1: renamed from eth1
[   83.439711][ T5937] netdevsim netdevsim0 netdevsim2: renamed from eth2
[   83.451224][ T5937] netdevsim netdevsim0 netdevsim3: renamed from eth3
[   83.527709][ T5937] 8021q: adding VLAN 0 to HW filter on device bond0
[   83.547401][ T5937] 8021q: adding VLAN 0 to HW filter on device team0
[   83.559527][ T1163] bridge0: port 1(bridge_slave_0) entered blocking state
[   83.567042][ T1163] bridge0: port 1(bridge_slave_0) entered forwarding state
[   83.580953][   T77] bridge0: port 2(bridge_slave_1) entered blocking state
[   83.588247][   T77] bridge0: port 2(bridge_slave_1) entered forwarding state
[   83.757130][ T5937] 8021q: adding VLAN 0 to HW filter on device batadv0
[   83.799384][ T5937] veth0_vlan: entered promiscuous mode
[   83.810537][ T5937] veth1_vlan: entered promiscuous mode
[   83.844528][ T5937] veth0_macvtap: entered promiscuous mode
[   83.855313][ T5937] veth1_macvtap: entered promiscuous mode
[   83.873169][ T5937] batman_adv: batadv0: Interface activated: batadv_slave_0
[   83.887438][ T5937] batman_adv: batadv0: Interface activated: batadv_slave_1
[   83.901325][ T1163] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[   83.911233][ T1163] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[   83.922240][ T1163] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[   83.946247][ T1163] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[   84.002322][ T1163] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   84.014105][ T1163] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   84.040034][ T4297] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   84.048040][ T4297] 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)
[   84.516200][ T4297] 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-build1871846936=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod'
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'
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 d6526ea3e6
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=amd64 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_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=\"d6526ea3e6ad9081c902859bbb80f9f840377cb4\"
/usr/bin/ld: /tmp/ccIQjaRt.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x386): 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