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 '10.128.1.80' (ED25519) to the list of known hosts.
2026/07/27 20:45:38 parsed 1 programs
[   86.026770][   T29] cfg80211: failed to load regulatory.db
[   88.221606][ T5635] cgroup: Unknown subsys name 'net'
[   88.316660][ T5635] cgroup: Unknown subsys name 'cpuset'
[   88.326170][ T5635] cgroup: Unknown subsys name 'rlimit'
Setting up swapspace version 1, size = 127995904 bytes
[   89.853727][ T5635] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[   93.127875][ T5650] 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.
[   94.578719][ T1174] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   94.591507][ T1174] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   95.475870][   T70] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   95.492582][   T70] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   95.659988][ T4937] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   95.668648][ T4937] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   95.678993][ T4937] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   95.687417][ T4937] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   95.697976][ T4937] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   95.825838][ T5652] bridge0: port 1(bridge_slave_0) entered blocking state
[   95.850626][ T5652] bridge0: port 1(bridge_slave_0) entered disabled state
[   95.858214][ T5652] bridge_slave_0: entered allmulticast mode
[   95.866827][ T5652] bridge_slave_0: entered promiscuous mode
[   95.930965][ T5652] bridge0: port 2(bridge_slave_1) entered blocking state
[   95.946843][ T5652] bridge0: port 2(bridge_slave_1) entered disabled state
[   95.956673][ T5652] bridge_slave_1: entered allmulticast mode
[   95.964717][ T5652] bridge_slave_1: entered promiscuous mode
[   96.126203][ T5652] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   96.150696][ T5652] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   96.446768][ T5652] team0: Port device team_slave_0 added
[   96.476070][ T5652] team0: Port device team_slave_1 added
[   96.688639][ T5652] batman_adv: batadv0: Adding interface: batadv_slave_0
[   96.697274][ T5652] 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.
[   96.723731][ T5652] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   96.738395][ T5652] batman_adv: batadv0: Adding interface: batadv_slave_1
[   96.745840][ T5652] 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.
[   96.772253][ T5652] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   96.918696][ T5652] hsr_slave_0: entered promiscuous mode
[   96.927236][ T5652] hsr_slave_1: entered promiscuous mode
[   97.247981][ T5652] netdevsim netdevsim4 netdevsim0: renamed from eth0
[   97.261607][ T5652] 8021q: adding VLAN 0 to HW filter on device netdevsim0
[   97.270426][ T5652] netdevsim netdevsim4 netdevsim1: renamed from eth1
[   97.281484][ T5652] 8021q: adding VLAN 0 to HW filter on device netdevsim1
[   97.291002][ T5652] netdevsim netdevsim4 netdevsim2: renamed from eth2
[   97.303953][ T5652] 8021q: adding VLAN 0 to HW filter on device netdevsim2
[   97.314032][ T5652] netdevsim netdevsim4 netdevsim3: renamed from eth3
[   97.324845][ T5652] 8021q: adding VLAN 0 to HW filter on device netdevsim3
[   97.407033][ T5652] 8021q: adding VLAN 0 to HW filter on device bond0
[   97.431053][ T5652] 8021q: adding VLAN 0 to HW filter on device team0
[   97.447972][ T1174] bridge0: port 1(bridge_slave_0) entered blocking state
[   97.455360][ T1174] bridge0: port 1(bridge_slave_0) entered forwarding state
[   97.471486][ T1174] bridge0: port 2(bridge_slave_1) entered blocking state
[   97.478650][ T1174] bridge0: port 2(bridge_slave_1) entered forwarding state
[   97.783193][   T51] Bluetooth: hci0: command tx timeout
[   97.866061][ T5652] 8021q: adding VLAN 0 to HW filter on device batadv0
[   98.099029][ T5652] veth0_vlan: entered promiscuous mode
[   98.117222][ T5652] veth1_vlan: entered promiscuous mode
[   98.154558][ T5652] veth0_macvtap: entered promiscuous mode
[   98.166399][ T5652] veth1_macvtap: entered promiscuous mode
[   98.193940][ T5652] batman_adv: batadv0: Interface activated: batadv_slave_0
[   98.216505][ T5652] batman_adv: batadv0: Interface activated: batadv_slave_1
[   98.235999][ T1174] netdevsim netdevsim4 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[   98.249389][ T1174] netdevsim netdevsim4 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[   98.259231][ T1174] netdevsim netdevsim4 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[   98.270798][ T1174] netdevsim netdevsim4 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
2026/07/27 20:45:53 executed programs: 0
[   98.443368][ T4937] Bluetooth: hci1: unexpected cc 0x0c03 length: 249 > 1
[   98.453302][ T4937] Bluetooth: hci1: unexpected cc 0x1003 length: 249 > 9
[   98.461154][ T4937] Bluetooth: hci1: unexpected cc 0x1001 length: 249 > 9
[   98.471369][ T4937] Bluetooth: hci1: unexpected cc 0x0c23 length: 249 > 4
[   98.480402][ T4937] Bluetooth: hci1: unexpected cc 0x0c38 length: 249 > 2
[   99.063103][ T5763] bridge0: port 1(bridge_slave_0) entered blocking state
[   99.070309][ T5763] bridge0: port 1(bridge_slave_0) entered disabled state
[   99.077556][ T5763] bridge_slave_0: entered allmulticast mode
[   99.085563][ T5763] bridge_slave_0: entered promiscuous mode
[   99.096465][ T5763] bridge0: port 2(bridge_slave_1) entered blocking state
[   99.103686][ T5763] bridge0: port 2(bridge_slave_1) entered disabled state
[   99.110804][ T5763] bridge_slave_1: entered allmulticast mode
[   99.118481][ T5763] bridge_slave_1: entered promiscuous mode
[   99.158253][ T5763] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   99.170672][ T5763] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   99.211515][ T5763] team0: Port device team_slave_0 added
[   99.219759][ T5763] team0: Port device team_slave_1 added
[   99.255119][ T5763] batman_adv: batadv0: Adding interface: batadv_slave_0
[   99.262108][ T5763] 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.
[   99.288023][ T5763] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   99.301183][ T5763] batman_adv: batadv0: Adding interface: batadv_slave_1
[   99.308365][ T5763] 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.
[   99.336528][ T5763] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   99.395931][ T5763] hsr_slave_0: entered promiscuous mode
[   99.402886][ T5763] hsr_slave_1: entered promiscuous mode
[   99.409031][ T5763] debugfs: 'hsr0' already exists in 'hsr'
[   99.414858][ T5763] Cannot create hsr debugfs directory
[   99.595234][ T5763] netdevsim netdevsim0 netdevsim0: renamed from eth0
[   99.605982][ T5763] 8021q: adding VLAN 0 to HW filter on device netdevsim0
[   99.614450][ T5763] netdevsim netdevsim0 netdevsim1: renamed from eth1
[   99.624115][ T5763] 8021q: adding VLAN 0 to HW filter on device netdevsim1
[   99.631918][ T5763] netdevsim netdevsim0 netdevsim2: renamed from eth2
[   99.642763][ T5763] 8021q: adding VLAN 0 to HW filter on device netdevsim2
[   99.651257][ T5763] netdevsim netdevsim0 netdevsim3: renamed from eth3
[   99.661821][ T5763] 8021q: adding VLAN 0 to HW filter on device netdevsim3
[   99.695240][ T5763] bridge0: port 2(bridge_slave_1) entered blocking state
[   99.702642][ T5763] bridge0: port 2(bridge_slave_1) entered forwarding state
[   99.710233][ T5763] bridge0: port 1(bridge_slave_0) entered blocking state
[   99.717393][ T5763] bridge0: port 1(bridge_slave_0) entered forwarding state
[   99.728738][   T70] bridge0: port 1(bridge_slave_0) entered disabled state
[   99.737174][   T70] bridge0: port 2(bridge_slave_1) entered disabled state
[   99.799700][ T5763] 8021q: adding VLAN 0 to HW filter on device bond0
[   99.820998][ T5763] 8021q: adding VLAN 0 to HW filter on device team0
[   99.835141][   T70] bridge0: port 1(bridge_slave_0) entered blocking state
[   99.842377][   T70] bridge0: port 1(bridge_slave_0) entered forwarding state
[   99.857734][  T589] bridge0: port 2(bridge_slave_1) entered blocking state
[   99.864854][  T589] bridge0: port 2(bridge_slave_1) entered forwarding state
[   99.873290][   T51] Bluetooth: hci0: command tx timeout
[  100.251063][ T5763] 8021q: adding VLAN 0 to HW filter on device batadv0
[  100.300341][ T5763] veth0_vlan: entered promiscuous mode
[  100.312576][ T5763] veth1_vlan: entered promiscuous mode
[  100.350268][ T5763] veth0_macvtap: entered promiscuous mode
[  100.359793][ T5763] veth1_macvtap: entered promiscuous mode
[  100.378370][ T5763] batman_adv: batadv0: Interface activated: batadv_slave_0
[  100.394801][ T5763] batman_adv: batadv0: Interface activated: batadv_slave_1
[  100.409106][ T1174] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[  100.420689][ T1174] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[  100.429930][ T1174] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[  100.445553][ T1174] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[  100.502294][   T51] Bluetooth: hci1: command tx timeout
[  100.509863][  T589] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[  100.517983][  T589] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[  100.548505][ T1174] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[  100.557101][ T1174] 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)
[  100.831714][ T1174] netdevsim netdevsim4 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  101.523057][ T1174] netdevsim netdevsim4 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  101.585585][ T1174] netdevsim netdevsim4 netdevsim1 (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-build3733203705=/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='go1.26.0'
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/cc7pSbnd.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