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 '10.128.1.121' (ED25519) to the list of known hosts.
2026/01/13 18:22:57 parsed 1 programs
[   39.737604][ T5818] cgroup: Unknown subsys name 'net'
[   39.878088][ T5818] cgroup: Unknown subsys name 'cpuset'
[   39.884617][ T5818] cgroup: Unknown subsys name 'rlimit'
Setting up swapspace version 1, size = 127995904 bytes
[   48.237154][ T5818] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[   49.551161][ T5830] 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.
[   49.613384][ T5837] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   49.621225][ T5837] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   49.629613][ T5837] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   49.637240][ T5837] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   49.644422][ T5837] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   49.752202][ T3460] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   49.775185][ T3460] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   49.789682][ T3460] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   49.797545][ T3460] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   49.943983][ T5853] chnl_net:caif_netlink_parms(): no params data found
[   49.965316][ T5853] bridge0: port 1(bridge_slave_0) entered blocking state
[   49.972479][ T5853] bridge0: port 1(bridge_slave_0) entered disabled state
[   49.979747][ T5853] bridge_slave_0: entered allmulticast mode
[   49.986031][ T5853] bridge_slave_0: entered promiscuous mode
[   49.992853][ T5853] bridge0: port 2(bridge_slave_1) entered blocking state
[   50.000221][ T5853] bridge0: port 2(bridge_slave_1) entered disabled state
[   50.007422][ T5853] bridge_slave_1: entered allmulticast mode
[   50.013704][ T5853] bridge_slave_1: entered promiscuous mode
[   50.026121][ T5853] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   50.035975][ T5853] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   50.052905][ T5853] team0: Port device team_slave_0 added
[   50.059154][ T5853] team0: Port device team_slave_1 added
[   50.069030][ T5853] batman_adv: batadv0: Adding interface: batadv_slave_0
[   50.075982][ T5853] 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.
[   50.102067][ T5853] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   50.114994][ T5853] batman_adv: batadv0: Adding interface: batadv_slave_1
[   50.121958][ T5853] 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.
[   50.148191][ T5853] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   50.165387][ T5853] hsr_slave_0: entered promiscuous mode
[   50.171247][ T5853] hsr_slave_1: entered promiscuous mode
[   50.202608][ T5853] netdevsim netdevsim0 netdevsim0: renamed from eth0
[   50.210965][ T5853] netdevsim netdevsim0 netdevsim1: renamed from eth1
[   50.218936][ T5853] netdevsim netdevsim0 netdevsim2: renamed from eth2
[   50.226729][ T5853] netdevsim netdevsim0 netdevsim3: renamed from eth3
[   50.239150][ T5853] bridge0: port 2(bridge_slave_1) entered blocking state
[   50.246233][ T5853] bridge0: port 2(bridge_slave_1) entered forwarding state
[   50.253857][ T5853] bridge0: port 1(bridge_slave_0) entered blocking state
[   50.260917][ T5853] bridge0: port 1(bridge_slave_0) entered forwarding state
[   50.278444][ T5853] 8021q: adding VLAN 0 to HW filter on device bond0
[   50.288437][ T3460] bridge0: port 1(bridge_slave_0) entered disabled state
[   50.295954][ T3460] bridge0: port 2(bridge_slave_1) entered disabled state
[   50.305801][ T5853] 8021q: adding VLAN 0 to HW filter on device team0
[   50.314283][ T4573] bridge0: port 1(bridge_slave_0) entered blocking state
[   50.321363][ T4573] bridge0: port 1(bridge_slave_0) entered forwarding state
[   50.330827][ T3460] bridge0: port 2(bridge_slave_1) entered blocking state
[   50.337917][ T3460] bridge0: port 2(bridge_slave_1) entered forwarding state
[   50.380987][ T5853] 8021q: adding VLAN 0 to HW filter on device batadv0
[   50.396507][ T5853] veth0_vlan: entered promiscuous mode
[   50.403685][ T5853] veth1_vlan: entered promiscuous mode
[   50.414754][ T5853] veth0_macvtap: entered promiscuous mode
[   50.421699][ T5853] veth1_macvtap: entered promiscuous mode
[   50.431138][ T5853] batman_adv: batadv0: Interface activated: batadv_slave_0
[   50.440524][ T5853] batman_adv: batadv0: Interface activated: batadv_slave_1
[   50.449469][ T1130] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[   50.458310][ T1130] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[   50.467856][ T1130] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[   50.477766][ T1130] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[   50.529701][ T3460] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   50.569237][ T3460] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   50.608411][ T3460] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   50.683979][ T3460] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
2026/01/13 18:23:10 executed programs: 0
[   53.658613][ T3460] bridge_slave_1: left allmulticast mode
[   53.664288][ T3460] bridge_slave_1: left promiscuous mode
[   53.670274][ T3460] bridge0: port 2(bridge_slave_1) entered disabled state
[   53.679063][ T3460] bridge_slave_0: left allmulticast mode
[   53.684697][ T3460] bridge_slave_0: left promiscuous mode
[   53.690779][ T3460] bridge0: port 1(bridge_slave_0) entered disabled state
[   53.739853][ T3460] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[   53.749123][ T3460] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[   53.758442][ T3460] bond0 (unregistering): Released all slaves
[   53.856952][ T3460] hsr_slave_0: left promiscuous mode
[   53.863150][ T3460] hsr_slave_1: left promiscuous mode
[   53.870171][ T3460] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[   53.877717][ T3460] batman_adv: batadv0: Removing interface: batadv_slave_0
[   53.886625][ T3460] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[   53.894412][ T3460] batman_adv: batadv0: Removing interface: batadv_slave_1
[   53.903231][ T3460] veth1_macvtap: left promiscuous mode
[   53.908951][ T3460] veth0_macvtap: left promiscuous mode
[   53.915617][ T3460] veth1_vlan: left promiscuous mode
[   53.922005][ T3460] veth0_vlan: left promiscuous mode
[   53.953116][ T3460] team0 (unregistering): Port device team_slave_1 removed
[   53.961607][ T3460] team0 (unregistering): Port device team_slave_0 removed
[   56.920975][ T5140] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   56.928165][ T5140] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   56.935432][ T5140] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   56.942732][ T5140] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   56.949986][ T5140] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   56.989043][ T5992] chnl_net:caif_netlink_parms(): no params data found
[   57.010137][ T5992] bridge0: port 1(bridge_slave_0) entered blocking state
[   57.017265][ T5992] bridge0: port 1(bridge_slave_0) entered disabled state
[   57.024449][ T5992] bridge_slave_0: entered allmulticast mode
[   57.030792][ T5992] bridge_slave_0: entered promiscuous mode
[   57.037327][ T5992] bridge0: port 2(bridge_slave_1) entered blocking state
[   57.044484][ T5992] bridge0: port 2(bridge_slave_1) entered disabled state
[   57.052048][ T5992] bridge_slave_1: entered allmulticast mode
[   57.058516][ T5992] bridge_slave_1: entered promiscuous mode
[   57.070292][ T5992] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   57.080278][ T5992] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   57.094207][ T5992] team0: Port device team_slave_0 added
[   57.100427][ T5992] team0: Port device team_slave_1 added
[   57.110683][ T5992] batman_adv: batadv0: Adding interface: batadv_slave_0
[   57.117665][ T5992] 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.
[   57.143807][ T5992] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   57.154877][ T5992] batman_adv: batadv0: Adding interface: batadv_slave_1
[   57.162052][ T5992] 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.
[   57.188234][ T5992] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   57.205397][ T5992] hsr_slave_0: entered promiscuous mode
[   57.211437][ T5992] hsr_slave_1: entered promiscuous mode
[   57.383616][ T5992] netdevsim netdevsim0 netdevsim0: renamed from eth0
[   57.391896][ T5992] netdevsim netdevsim0 netdevsim1: renamed from eth1
[   57.400985][ T5992] netdevsim netdevsim0 netdevsim2: renamed from eth2
[   57.409244][ T5992] netdevsim netdevsim0 netdevsim3: renamed from eth3
[   57.431942][ T5992] bridge0: port 2(bridge_slave_1) entered blocking state
[   57.439113][ T5992] bridge0: port 2(bridge_slave_1) entered forwarding state
[   57.446468][ T5992] bridge0: port 1(bridge_slave_0) entered blocking state
[   57.453856][ T5992] bridge0: port 1(bridge_slave_0) entered forwarding state
[   57.474481][ T5992] 8021q: adding VLAN 0 to HW filter on device bond0
[   57.485469][ T3460] bridge0: port 1(bridge_slave_0) entered disabled state
[   57.498953][ T3460] bridge0: port 2(bridge_slave_1) entered disabled state
[   57.512285][ T5992] 8021q: adding VLAN 0 to HW filter on device team0
[   57.522505][ T3460] bridge0: port 1(bridge_slave_0) entered blocking state
[   57.529634][ T3460] bridge0: port 1(bridge_slave_0) entered forwarding state
[   57.545957][ T5992] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network
[   57.556701][ T5992] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network
[   57.569608][ T3460] bridge0: port 2(bridge_slave_1) entered blocking state
[   57.576695][ T3460] bridge0: port 2(bridge_slave_1) entered forwarding state
[   57.638382][ T5992] 8021q: adding VLAN 0 to HW filter on device batadv0
[   57.665066][ T5992] veth0_vlan: entered promiscuous mode
[   57.674980][ T5992] veth1_vlan: entered promiscuous mode
[   57.689015][ T5992] veth0_macvtap: entered promiscuous mode
[   57.697141][ T5992] veth1_macvtap: entered promiscuous mode
[   57.708648][ T5992] batman_adv: batadv0: Interface activated: batadv_slave_0
[   57.719002][ T5992] batman_adv: batadv0: Interface activated: batadv_slave_1
[   57.729396][ T3460] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[   57.743109][ T3460] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[   57.753040][ T3460] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[   57.763699][ T3460] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
SYZFAIL: failed to recv rpc
fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor)
[   57.791585][ T3460] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   57.803181][ T3460] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   57.815546][   T31] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   57.823863][   T31] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50


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-build931792225=/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=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/ccmR8XVU.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