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 '10.128.1.165' (ED25519) to the list of known hosts.
2026/01/05 20:56:36 parsed 1 programs
[   78.026459][ T5830] cgroup: Unknown subsys name 'net'
[   78.199235][ T5830] cgroup: Unknown subsys name 'cpuset'
[   78.208293][ T5830] cgroup: Unknown subsys name 'rlimit'
Setting up swapspace version 1, size = 127995904 bytes
[   79.677956][ T5830] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[   82.380030][ 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.
[   83.266082][ T5868] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   83.274112][ T5868] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   83.282513][ T5868] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   83.290906][ T5868] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   83.301074][ T5868] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   83.664854][ T5873] chnl_net:caif_netlink_parms(): no params data found
[   83.750448][ T5873] bridge0: port 1(bridge_slave_0) entered blocking state
[   83.758556][ T5873] bridge0: port 1(bridge_slave_0) entered disabled state
[   83.767173][ T5873] bridge_slave_0: entered allmulticast mode
[   83.774147][ T5873] bridge_slave_0: entered promiscuous mode
[   83.784078][ T5873] bridge0: port 2(bridge_slave_1) entered blocking state
[   83.791557][ T5873] bridge0: port 2(bridge_slave_1) entered disabled state
[   83.799403][ T5873] bridge_slave_1: entered allmulticast mode
[   83.807602][ T5873] bridge_slave_1: entered promiscuous mode
[   83.835566][ T5873] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   83.847583][ T5873] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   83.876955][ T5873] team0: Port device team_slave_0 added
[   83.884609][ T5873] team0: Port device team_slave_1 added
[   83.908976][ T5873] batman_adv: batadv0: Adding interface: batadv_slave_0
[   83.916036][ T5873] 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.
[   83.943351][ T5873] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   83.956347][ T5873] batman_adv: batadv0: Adding interface: batadv_slave_1
[   83.963346][ T5873] 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.
[   83.989894][ T5873] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   84.027639][ T5873] hsr_slave_0: entered promiscuous mode
[   84.033941][ T5873] hsr_slave_1: entered promiscuous mode
[   84.156395][ T5873] netdevsim netdevsim0 netdevsim0: renamed from eth0
[   84.168496][ T5873] netdevsim netdevsim0 netdevsim1: renamed from eth1
[   84.178720][ T5873] netdevsim netdevsim0 netdevsim2: renamed from eth2
[   84.188725][ T5873] netdevsim netdevsim0 netdevsim3: renamed from eth3
[   84.218492][ T5873] bridge0: port 2(bridge_slave_1) entered blocking state
[   84.225873][ T5873] bridge0: port 2(bridge_slave_1) entered forwarding state
[   84.233719][ T5873] bridge0: port 1(bridge_slave_0) entered blocking state
[   84.241002][ T5873] bridge0: port 1(bridge_slave_0) entered forwarding state
[   84.292245][ T5873] 8021q: adding VLAN 0 to HW filter on device bond0
[   84.311488][ T1139] bridge0: port 1(bridge_slave_0) entered disabled state
[   84.320693][ T1139] bridge0: port 2(bridge_slave_1) entered disabled state
[   84.337635][ T5873] 8021q: adding VLAN 0 to HW filter on device team0
[   84.352311][ T1002] bridge0: port 1(bridge_slave_0) entered blocking state
[   84.360567][ T1002] bridge0: port 1(bridge_slave_0) entered forwarding state
[   84.375955][ T1139] bridge0: port 2(bridge_slave_1) entered blocking state
[   84.383304][ T1139] bridge0: port 2(bridge_slave_1) entered forwarding state
[   84.542233][ T5873] 8021q: adding VLAN 0 to HW filter on device batadv0
[   84.581342][ T5873] veth0_vlan: entered promiscuous mode
[   84.592388][ T5873] veth1_vlan: entered promiscuous mode
[   84.620732][ T5873] veth0_macvtap: entered promiscuous mode
[   84.631269][ T5873] veth1_macvtap: entered promiscuous mode
[   84.650372][ T5873] batman_adv: batadv0: Interface activated: batadv_slave_0
[   84.662502][ T5873] batman_adv: batadv0: Interface activated: batadv_slave_1
[   84.677778][ T3486] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[   84.688690][ T3486] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[   84.699622][ T3486] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[   84.708906][ T3486] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[   84.836566][ T3486] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   84.889445][ T3486] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   84.942202][ T3486] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   85.022495][ T3486] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[   85.609693][ T1139] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   85.622198][ T1139] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   85.651979][ T1002] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   85.661706][ T1002] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
2026/01/05 20:56:47 executed programs: 0
[   86.506585][ T5868] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   86.514892][ T5868] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   86.523279][ T5868] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   86.531873][ T5868] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   86.540336][ T5868] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   86.681582][ T5939] chnl_net:caif_netlink_parms(): no params data found
[   86.768315][ T5939] bridge0: port 1(bridge_slave_0) entered blocking state
[   86.775615][ T5939] bridge0: port 1(bridge_slave_0) entered disabled state
[   86.783025][ T5939] bridge_slave_0: entered allmulticast mode
[   86.790583][ T5939] bridge_slave_0: entered promiscuous mode
[   86.800267][ T5939] bridge0: port 2(bridge_slave_1) entered blocking state
[   86.807617][ T5939] bridge0: port 2(bridge_slave_1) entered disabled state
[   86.814846][ T5939] bridge_slave_1: entered allmulticast mode
[   86.822068][ T5939] bridge_slave_1: entered promiscuous mode
[   86.851357][ T5939] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   86.864031][ T5939] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   86.897839][ T5939] team0: Port device team_slave_0 added
[   86.906276][ T5939] team0: Port device team_slave_1 added
[   86.932242][ T5939] batman_adv: batadv0: Adding interface: batadv_slave_0
[   86.939772][ 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.
[   86.967588][ T5939] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   86.979687][ T5939] batman_adv: batadv0: Adding interface: batadv_slave_1
[   86.986763][ 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.
[   87.012896][ T5939] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   87.037081][   T24] cfg80211: failed to load regulatory.db
[   87.069098][ T5939] hsr_slave_0: entered promiscuous mode
[   87.076496][ T5939] hsr_slave_1: entered promiscuous mode
[   87.082577][ T5939] debugfs: 'hsr0' already exists in 'hsr'
[   87.088799][ T5939] Cannot create hsr debugfs directory
[   87.893937][ T3486] bridge_slave_1: left allmulticast mode
[   87.901717][ T3486] bridge_slave_1: left promiscuous mode
[   87.908387][ T3486] bridge0: port 2(bridge_slave_1) entered disabled state
[   87.921596][ T3486] bridge_slave_0: left allmulticast mode
[   87.928768][ T3486] bridge_slave_0: left promiscuous mode
[   87.934534][ T3486] bridge0: port 1(bridge_slave_0) entered disabled state
[   88.139001][ T3486] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[   88.151375][ T3486] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[   88.161527][ T3486] bond0 (unregistering): Released all slaves
[   88.253132][ T3486] hsr_slave_0: left promiscuous mode
[   88.260353][ T3486] hsr_slave_1: left promiscuous mode
[   88.266854][ T3486] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[   88.274399][ T3486] batman_adv: batadv0: Removing interface: batadv_slave_0
[   88.288760][ T3486] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[   88.297175][ T3486] batman_adv: batadv0: Removing interface: batadv_slave_1
[   88.319207][ T3486] veth1_macvtap: left promiscuous mode
[   88.324959][ T3486] veth0_macvtap: left promiscuous mode
[   88.331003][ T3486] veth1_vlan: left promiscuous mode
[   88.336513][ T3486] veth0_vlan: left promiscuous mode
[   88.628361][   T52] Bluetooth: hci0: command tx timeout
[   88.746714][ T3486] team0 (unregistering): Port device team_slave_1 removed
[   88.772999][ T3486] team0 (unregistering): Port device team_slave_0 removed
[   89.307593][ T5939] netdevsim netdevsim0 netdevsim0: renamed from eth0
[   89.323224][ T5939] netdevsim netdevsim0 netdevsim1: renamed from eth1
[   89.333576][ T5939] netdevsim netdevsim0 netdevsim2: renamed from eth2
[   89.350822][ T5939] netdevsim netdevsim0 netdevsim3: renamed from eth3
[   89.744327][ T5939] 8021q: adding VLAN 0 to HW filter on device bond0
[   89.772965][ T5939] 8021q: adding VLAN 0 to HW filter on device team0
[   89.788052][ T1306] bridge0: port 1(bridge_slave_0) entered blocking state
[   89.795241][ T1306] bridge0: port 1(bridge_slave_0) entered forwarding state
[   89.817373][ T1306] bridge0: port 2(bridge_slave_1) entered blocking state
[   89.824566][ T1306] bridge0: port 2(bridge_slave_1) entered forwarding state
[   90.306083][ T5939] 8021q: adding VLAN 0 to HW filter on device batadv0
[   90.414752][ T5939] veth0_vlan: entered promiscuous mode
[   90.433233][ T5939] veth1_vlan: entered promiscuous mode
[   90.501193][ T5939] veth0_macvtap: entered promiscuous mode
[   90.510593][ T5939] veth1_macvtap: entered promiscuous mode
[   90.534057][ T5939] batman_adv: batadv0: Interface activated: batadv_slave_0
[   90.551536][ T5939] batman_adv: batadv0: Interface activated: batadv_slave_1
[   90.564235][ T1090] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[   90.576079][ T1090] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[   90.595695][ T1090] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[   90.604559][ T1090] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[   90.658094][ T3486] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   90.671344][ T3486] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   90.694701][ T1090] wlan1: Created IBSS using preconfigured 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)
[   90.702678][ T1090] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   90.712769][   T52] Bluetooth: hci0: command tx timeout


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-build582412968=/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/ccLbzhKm.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