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.
2026/01/24 23:11:42 parsed 1 programs
[   72.150844][ T5830] cgroup: Unknown subsys name 'net'
[   72.340460][ T5830] cgroup: Unknown subsys name 'cpuset'
[   72.349471][ T5830] cgroup: Unknown subsys name 'rlimit'
Setting up swapspace version 1, size = 127995904 bytes
[   73.735925][ T5830] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[   76.687470][ T5843] 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.
[   76.921765][   T53] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   76.937985][   T53] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   76.946139][   T53] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   76.954200][   T53] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   76.962370][   T53] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   78.794988][ T1326] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   78.804444][ T1326] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   78.871191][ T5886] chnl_net:caif_netlink_parms(): no params data found
[   79.068589][ T1326] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   79.076701][ T1326] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   79.119162][ T5886] bridge0: port 1(bridge_slave_0) entered blocking state
[   79.127282][ T5886] bridge0: port 1(bridge_slave_0) entered disabled state
[   79.134537][ T5886] bridge_slave_0: entered allmulticast mode
[   79.142556][ T5886] bridge_slave_0: entered promiscuous mode
[   79.155979][ T5886] bridge0: port 2(bridge_slave_1) entered blocking state
[   79.163406][ T5886] bridge0: port 2(bridge_slave_1) entered disabled state
[   79.176535][ T5886] bridge_slave_1: entered allmulticast mode
[   79.184817][ T5886] bridge_slave_1: entered promiscuous mode
[   79.303667][ T5886] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   79.318838][ T5886] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   79.409029][ T5886] team0: Port device team_slave_0 added
[   79.417793][ T5886] team0: Port device team_slave_1 added
[   79.485449][ T5886] batman_adv: batadv0: Adding interface: batadv_slave_0
[   79.492563][ T5886] 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.
[   79.521421][ T5886] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   79.637684][ T5886] batman_adv: batadv0: Adding interface: batadv_slave_1
[   79.644809][ T5886] 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.
[   79.680066][ T5886] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   79.820039][ T5886] hsr_slave_0: entered promiscuous mode
[   79.826746][ T5886] hsr_slave_1: entered promiscuous mode
[   79.984965][ T5886] netdevsim netdevsim0 netdevsim0: renamed from eth0
[   79.997432][ T5886] netdevsim netdevsim0 netdevsim1: renamed from eth1
[   80.009381][ T5886] netdevsim netdevsim0 netdevsim2: renamed from eth2
[   80.019646][ T5886] netdevsim netdevsim0 netdevsim3: renamed from eth3
[   80.088164][ T5886] 8021q: adding VLAN 0 to HW filter on device bond0
[   80.105512][ T5886] 8021q: adding VLAN 0 to HW filter on device team0
[   80.117278][ T1326] bridge0: port 1(bridge_slave_0) entered blocking state
[   80.124607][ T1326] bridge0: port 1(bridge_slave_0) entered forwarding state
[   80.140553][ T1090] bridge0: port 2(bridge_slave_1) entered blocking state
[   80.147762][ T1090] bridge0: port 2(bridge_slave_1) entered forwarding state
[   80.292569][ T5886] 8021q: adding VLAN 0 to HW filter on device batadv0
[   80.328660][ T5886] veth0_vlan: entered promiscuous mode
[   80.341031][ T5886] veth1_vlan: entered promiscuous mode
[   80.366210][ T5886] veth0_macvtap: entered promiscuous mode
[   80.374880][ T5886] veth1_macvtap: entered promiscuous mode
[   80.392669][ T5886] batman_adv: batadv0: Interface activated: batadv_slave_0
[   80.407864][ T5886] batman_adv: batadv0: Interface activated: batadv_slave_1
[   80.422757][ T1090] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[   80.432904][ T1090] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[   80.443478][ T1090] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[   80.452746][ T1090] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
2026/01/24 23:11:52 executed programs: 0
[   80.600056][ T5152] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   80.608424][ T5152] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   80.617766][ T5152] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   80.619239][ T1326] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   80.637576][ T5152] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   80.645401][ T5152] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   80.714064][ T1326] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   80.812440][ T1326] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   80.852877][ T5942] chnl_net:caif_netlink_parms(): no params data found
[   80.900992][ T1326] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   80.949720][ T5942] bridge0: port 1(bridge_slave_0) entered blocking state
[   80.956946][ T5942] bridge0: port 1(bridge_slave_0) entered disabled state
[   80.964053][ T5942] bridge_slave_0: entered allmulticast mode
[   80.971285][ T5942] bridge_slave_0: entered promiscuous mode
[   80.979906][ T5942] bridge0: port 2(bridge_slave_1) entered blocking state
[   80.987524][ T5942] bridge0: port 2(bridge_slave_1) entered disabled state
[   80.994748][ T5942] bridge_slave_1: entered allmulticast mode
[   81.001764][ T5942] bridge_slave_1: entered promiscuous mode
[   81.031487][ T5942] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   81.043421][ T5942] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   81.073031][ T5942] team0: Port device team_slave_0 added
[   81.080482][ T5942] team0: Port device team_slave_1 added
[   81.114438][ T5942] batman_adv: batadv0: Adding interface: batadv_slave_0
[   81.121526][ T5942] 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.
[   81.148661][ T5942] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   81.161171][ T5942] batman_adv: batadv0: Adding interface: batadv_slave_1
[   81.168611][ T5942] 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.
[   81.195019][ T5942] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   81.239224][ T5942] hsr_slave_0: entered promiscuous mode
[   81.245544][ T5942] hsr_slave_1: entered promiscuous mode
[   81.251922][ T5942] debugfs: 'hsr0' already exists in 'hsr'
[   81.258791][ T5942] Cannot create hsr debugfs directory
[   82.697825][   T53] Bluetooth: hci0: command tx timeout
[   83.342377][ T1326] bridge_slave_1: left allmulticast mode
[   83.349360][ T1326] bridge_slave_1: left promiscuous mode
[   83.355601][ T1326] bridge0: port 2(bridge_slave_1) entered disabled state
[   83.368363][ T1326] bridge_slave_0: left allmulticast mode
[   83.374044][ T1326] bridge_slave_0: left promiscuous mode
[   83.381245][ T1326] bridge0: port 1(bridge_slave_0) entered disabled state
[   83.597876][ T1326] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[   83.609505][ T1326] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[   83.619296][ T1326] bond0 (unregistering): Released all slaves
[   83.707824][ T1326] hsr_slave_0: left promiscuous mode
[   83.720081][ T1326] hsr_slave_1: left promiscuous mode
[   83.726238][ T1326] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[   83.734033][ T1326] batman_adv: batadv0: Removing interface: batadv_slave_0
[   83.746674][ T1326] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[   83.754872][ T1326] batman_adv: batadv0: Removing interface: batadv_slave_1
[   83.774781][ T1326] veth1_macvtap: left promiscuous mode
[   83.784379][ T1326] veth0_macvtap: left promiscuous mode
[   83.790144][ T1326] veth1_vlan: left promiscuous mode
[   83.795905][ T1326] veth0_vlan: left promiscuous mode
[   84.195619][ T1326] team0 (unregistering): Port device team_slave_1 removed
[   84.222688][ T1326] team0 (unregistering): Port device team_slave_0 removed
[   84.688498][ T5942] netdevsim netdevsim0 netdevsim0: renamed from eth0
[   84.707662][ T5942] netdevsim netdevsim0 netdevsim1: renamed from eth1
[   84.729181][ T5942] netdevsim netdevsim0 netdevsim2: renamed from eth2
[   84.744381][ T5942] netdevsim netdevsim0 netdevsim3: renamed from eth3
[   84.778304][   T53] Bluetooth: hci0: command tx timeout
[   84.867906][ T5942] 8021q: adding VLAN 0 to HW filter on device bond0
[   84.886748][ T5942] 8021q: adding VLAN 0 to HW filter on device team0
[   84.904053][ T3014] bridge0: port 1(bridge_slave_0) entered blocking state
[   84.911250][ T3014] bridge0: port 1(bridge_slave_0) entered forwarding state
[   84.933617][ T1326] bridge0: port 2(bridge_slave_1) entered blocking state
[   84.940812][ T1326] bridge0: port 2(bridge_slave_1) entered forwarding state
[   85.181505][ T5942] 8021q: adding VLAN 0 to HW filter on device batadv0
[   85.236356][ T5942] veth0_vlan: entered promiscuous mode
[   85.252456][ T5942] veth1_vlan: entered promiscuous mode
[   85.292278][ T5942] veth0_macvtap: entered promiscuous mode
[   85.303658][ T5942] veth1_macvtap: entered promiscuous mode
[   85.326469][ T5942] batman_adv: batadv0: Interface activated: batadv_slave_0
[   85.348472][ T5942] batman_adv: batadv0: Interface activated: batadv_slave_1
[   85.366111][ T3752] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[   85.388446][ T3752] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[   85.412253][ T3752] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[   85.435652][ T3752] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[   85.468195][ T3752] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   85.476250][ T3752] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   85.506496][ T1326] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   85.514561][ T1326] 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)


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-build3524373011=/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/cccslJjj.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