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 '10.128.1.136' (ED25519) to the list of known hosts.
2026/01/04 21:26:11 parsed 1 programs
[   91.164095][   T10] cfg80211: failed to load regulatory.db
[   92.348382][ T5834] cgroup: Unknown subsys name 'net'
[   92.456848][ T5834] cgroup: Unknown subsys name 'cpuset'
[   92.466243][ T5834] cgroup: Unknown subsys name 'rlimit'
Setting up swapspace version 1, size = 127995904 bytes
[   94.061244][ T5834] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[   96.919503][ T5840] 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.
[   97.439124][ T3737] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   97.454074][ T3737] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   97.519693][ T3737] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   97.531933][ T3737] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   99.107131][ T5876] chnl_net:caif_netlink_parms(): no params data found
[   99.218255][ T5876] bridge0: port 1(bridge_slave_0) entered blocking state
[   99.225501][ T5876] bridge0: port 1(bridge_slave_0) entered disabled state
[   99.232850][ T5876] bridge_slave_0: entered allmulticast mode
[   99.240315][ T5876] bridge_slave_0: entered promiscuous mode
[   99.249302][ T5876] bridge0: port 2(bridge_slave_1) entered blocking state
[   99.256497][ T5876] bridge0: port 2(bridge_slave_1) entered disabled state
[   99.265240][ T5876] bridge_slave_1: entered allmulticast mode
[   99.272721][ T5876] bridge_slave_1: entered promiscuous mode
[   99.310980][ T5876] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   99.323627][ T5876] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   99.358836][ T5876] team0: Port device team_slave_0 added
[   99.368309][ T5876] team0: Port device team_slave_1 added
[   99.400805][ T5876] batman_adv: batadv0: Adding interface: batadv_slave_0
[   99.407779][ T5876] 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.
[   99.434891][ T5876] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   99.447912][ T5876] batman_adv: batadv0: Adding interface: batadv_slave_1
[   99.454895][ T5876] 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.
[   99.480808][ T5876] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   99.533078][ T5876] hsr_slave_0: entered promiscuous mode
[   99.539666][ T5876] hsr_slave_1: entered promiscuous mode
[   99.700780][ T5876] netdevsim netdevsim0 netdevsim0: renamed from eth0
[   99.713474][ T5876] netdevsim netdevsim0 netdevsim1: renamed from eth1
[   99.723854][ T5876] netdevsim netdevsim0 netdevsim2: renamed from eth2
[   99.734378][ T5876] netdevsim netdevsim0 netdevsim3: renamed from eth3
[   99.815832][ T5876] 8021q: adding VLAN 0 to HW filter on device bond0
[   99.838252][ T5876] 8021q: adding VLAN 0 to HW filter on device team0
[   99.853200][   T61] bridge0: port 1(bridge_slave_0) entered blocking state
[   99.860383][   T61] bridge0: port 1(bridge_slave_0) entered forwarding state
[   99.876399][   T12] bridge0: port 2(bridge_slave_1) entered blocking state
[   99.883498][   T12] bridge0: port 2(bridge_slave_1) entered forwarding state
[  100.091124][ T5876] 8021q: adding VLAN 0 to HW filter on device batadv0
[  100.135951][ T5876] veth0_vlan: entered promiscuous mode
[  100.147814][ T5876] veth1_vlan: entered promiscuous mode
[  100.179365][ T5876] veth0_macvtap: entered promiscuous mode
[  100.189306][ T5876] veth1_macvtap: entered promiscuous mode
[  100.210036][ T5876] batman_adv: batadv0: Interface activated: batadv_slave_0
[  100.229117][ T5876] batman_adv: batadv0: Interface activated: batadv_slave_1
[  100.244339][ T4037] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[  100.254903][ T4037] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[  100.264954][ T4037] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[  100.275040][ T4037] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[  100.420672][ T4037] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  100.545326][ T4037] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  100.619305][   T52] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[  100.628154][   T52] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[  100.636011][   T52] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[  100.637111][ T4037] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  100.654527][   T52] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[  100.666117][   T52] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[  100.728426][ T4037] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
2026/01/04 21:26:25 executed programs: 0
[  102.284546][ T5143] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[  102.292098][ T5143] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[  102.302610][ T5143] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[  102.310572][ T5143] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[  102.318619][ T5143] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[  102.508066][ T5939] chnl_net:caif_netlink_parms(): no params data found
[  102.597940][ T5939] bridge0: port 1(bridge_slave_0) entered blocking state
[  102.605664][ T5939] bridge0: port 1(bridge_slave_0) entered disabled state
[  102.613463][ T5939] bridge_slave_0: entered allmulticast mode
[  102.620876][ T5939] bridge_slave_0: entered promiscuous mode
[  102.629202][ T5939] bridge0: port 2(bridge_slave_1) entered blocking state
[  102.636895][ T5939] bridge0: port 2(bridge_slave_1) entered disabled state
[  102.644495][ T5939] bridge_slave_1: entered allmulticast mode
[  102.651828][ T5939] bridge_slave_1: entered promiscuous mode
[  102.688566][ T5939] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[  102.700749][ T5939] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[  102.739167][ T5939] team0: Port device team_slave_0 added
[  102.747418][ T5939] team0: Port device team_slave_1 added
[  102.779616][ T5939] batman_adv: batadv0: Adding interface: batadv_slave_0
[  102.787149][ T5939] 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.
[  102.814084][ T5939] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[  102.826491][ T5939] batman_adv: batadv0: Adding interface: batadv_slave_1
[  102.833467][ T5939] 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.
[  102.859397][ T5939] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[  102.926862][ T5939] hsr_slave_0: entered promiscuous mode
[  102.935046][ T5939] hsr_slave_1: entered promiscuous mode
[  102.941296][ T5939] debugfs: 'hsr0' already exists in 'hsr'
[  102.947306][ T5939] Cannot create hsr debugfs directory
[  103.026743][ T4037] bridge_slave_1: left allmulticast mode
[  103.032896][ T4037] bridge_slave_1: left promiscuous mode
[  103.038949][ T4037] bridge0: port 2(bridge_slave_1) entered disabled state
[  103.050879][ T4037] bridge_slave_0: left allmulticast mode
[  103.057561][ T4037] bridge_slave_0: left promiscuous mode
[  103.064278][ T4037] bridge0: port 1(bridge_slave_0) entered disabled state
[  103.288811][ T4037] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[  103.299981][ T4037] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[  103.310292][ T4037] bond0 (unregistering): Released all slaves
[  103.425012][ T4037] hsr_slave_0: left promiscuous mode
[  103.431225][ T4037] hsr_slave_1: left promiscuous mode
[  103.437620][ T4037] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[  103.445855][ T4037] batman_adv: batadv0: Removing interface: batadv_slave_0
[  103.454358][ T4037] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[  103.461998][ T4037] batman_adv: batadv0: Removing interface: batadv_slave_1
[  103.484123][ T4037] veth1_macvtap: left promiscuous mode
[  103.489753][ T4037] veth0_macvtap: left promiscuous mode
[  103.496579][ T4037] veth1_vlan: left promiscuous mode
[  103.501972][ T4037] veth0_vlan: left promiscuous mode
[  103.885169][ T4037] team0 (unregistering): Port device team_slave_1 removed
[  103.917009][ T4037] team0 (unregistering): Port device team_slave_0 removed
[  104.363084][   T52] Bluetooth: hci0: command tx timeout
[  104.875753][ T5939] netdevsim netdevsim0 netdevsim0: renamed from eth0
[  104.887745][ T5939] netdevsim netdevsim0 netdevsim1: renamed from eth1
[  104.907315][ T5939] netdevsim netdevsim0 netdevsim2: renamed from eth2
[  104.918777][ T5939] netdevsim netdevsim0 netdevsim3: renamed from eth3
[  105.081024][ T5939] 8021q: adding VLAN 0 to HW filter on device bond0
[  105.156976][ T5939] 8021q: adding VLAN 0 to HW filter on device team0
[  105.171039][   T12] bridge0: port 1(bridge_slave_0) entered blocking state
[  105.178196][   T12] bridge0: port 1(bridge_slave_0) entered forwarding state
[  105.211349][ T3737] bridge0: port 2(bridge_slave_1) entered blocking state
[  105.218588][ T3737] bridge0: port 2(bridge_slave_1) entered forwarding state
[  105.627740][ T5939] 8021q: adding VLAN 0 to HW filter on device batadv0
[  105.711078][ T5939] veth0_vlan: entered promiscuous mode
[  105.726785][ T5939] veth1_vlan: entered promiscuous mode
[  105.778772][ T5939] veth0_macvtap: entered promiscuous mode
[  105.805588][ T5939] veth1_macvtap: entered promiscuous mode
[  105.851511][ T5939] batman_adv: batadv0: Interface activated: batadv_slave_0
[  105.881848][ T5939] batman_adv: batadv0: Interface activated: batadv_slave_1
[  105.909183][ T4037] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[  105.936272][ T4037] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[  105.945217][ T4037] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[  105.976372][ T4037] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[  106.127383][   T37] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[  106.145998][   T37] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[  106.214965][ T4037] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[  106.223654][ T4037] 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-build1994014654=/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/ccycDiVp.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