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 '10.128.0.187' (ED25519) to the list of known hosts.
2026/01/04 14:07:00 parsed 1 programs
[   91.123637][  T110] cfg80211: failed to load regulatory.db
[   94.450777][ T5832] cgroup: Unknown subsys name 'net'
[   94.606359][ T5832] cgroup: Unknown subsys name 'cpuset'
[   94.616330][ T5832] cgroup: Unknown subsys name 'rlimit'
Setting up swapspace version 1, size = 127995904 bytes
[   96.192863][ T5832] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[   99.129385][ T5846] 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.
[   99.364090][   T53] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[   99.376568][   T53] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[   99.402186][   T53] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[   99.414445][   T53] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[   99.426136][   T53] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[   99.935450][ T5845] chnl_net:caif_netlink_parms(): no params data found
[  100.281078][ T5845] bridge0: port 1(bridge_slave_0) entered blocking state
[  100.306939][ T5845] bridge0: port 1(bridge_slave_0) entered disabled state
[  100.317431][ T5845] bridge_slave_0: entered allmulticast mode
[  100.325723][ T5845] bridge_slave_0: entered promiscuous mode
[  100.377448][ T5845] bridge0: port 2(bridge_slave_1) entered blocking state
[  100.420028][ T5845] bridge0: port 2(bridge_slave_1) entered disabled state
[  100.474167][ T5845] bridge_slave_1: entered allmulticast mode
[  100.489479][ T5845] bridge_slave_1: entered promiscuous mode
[  100.966764][ T5845] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[  101.036299][ T5845] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[  101.125774][   T12] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[  101.143032][   T12] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[  101.194607][ T5845] team0: Port device team_slave_0 added
[  101.255530][ T5845] team0: Port device team_slave_1 added
[  101.304008][ T5845] batman_adv: batadv0: Adding interface: batadv_slave_0
[  101.310971][ T5845] 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.
[  101.337613][ T5845] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[  101.382415][   T12] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[  101.391998][   T12] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[  101.408580][ T5845] batman_adv: batadv0: Adding interface: batadv_slave_1
[  101.426548][ T5845] 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.
[  101.461957][ T5845] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[  101.881098][ T5845] hsr_slave_0: entered promiscuous mode
[  101.914122][ T5845] hsr_slave_1: entered promiscuous mode
[  102.728751][ T5845] netdevsim netdevsim0 netdevsim0: renamed from eth0
[  102.750324][ T5845] netdevsim netdevsim0 netdevsim1: renamed from eth1
[  102.830230][ T5845] netdevsim netdevsim0 netdevsim2: renamed from eth2
[  102.868846][ T5845] netdevsim netdevsim0 netdevsim3: renamed from eth3
[  103.029742][ T5845] 8021q: adding VLAN 0 to HW filter on device bond0
[  103.058147][ T5845] 8021q: adding VLAN 0 to HW filter on device team0
[  103.078594][ T3552] bridge0: port 1(bridge_slave_0) entered blocking state
[  103.085808][ T3552] bridge0: port 1(bridge_slave_0) entered forwarding state
[  103.105022][ T3552] bridge0: port 2(bridge_slave_1) entered blocking state
[  103.112297][ T3552] bridge0: port 2(bridge_slave_1) entered forwarding state
[  103.314244][ T5845] 8021q: adding VLAN 0 to HW filter on device batadv0
[  103.360546][ T5845] veth0_vlan: entered promiscuous mode
[  103.373133][ T5845] veth1_vlan: entered promiscuous mode
[  103.401722][ T5845] veth0_macvtap: entered promiscuous mode
[  103.414147][ T5845] veth1_macvtap: entered promiscuous mode
[  103.433472][ T5845] batman_adv: batadv0: Interface activated: batadv_slave_0
[  103.449165][ T5845] batman_adv: batadv0: Interface activated: batadv_slave_1
[  103.463866][ T3552] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[  103.474263][ T3552] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[  103.484403][ T3552] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[  103.503515][ T3552] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
2026/01/04 14:07:13 executed programs: 0
[  103.666807][ T3725] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  103.679788][ T5142] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[  103.689848][ T5142] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[  103.699530][ T5142] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[  103.708654][ T5142] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[  103.716582][ T5142] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[  103.739460][ T3725] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  103.786038][ T3725] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  103.840245][ T3725] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  103.989919][ T5935] chnl_net:caif_netlink_parms(): no params data found
[  104.086753][ T5935] bridge0: port 1(bridge_slave_0) entered blocking state
[  104.095306][ T5935] bridge0: port 1(bridge_slave_0) entered disabled state
[  104.103217][ T5935] bridge_slave_0: entered allmulticast mode
[  104.110591][ T5935] bridge_slave_0: entered promiscuous mode
[  104.121294][ T5935] bridge0: port 2(bridge_slave_1) entered blocking state
[  104.128555][ T5935] bridge0: port 2(bridge_slave_1) entered disabled state
[  104.135758][ T5935] bridge_slave_1: entered allmulticast mode
[  104.143459][ T5935] bridge_slave_1: entered promiscuous mode
[  104.182015][ T5935] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[  104.194970][ T5935] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[  104.234279][ T5935] team0: Port device team_slave_0 added
[  104.242493][ T5935] team0: Port device team_slave_1 added
[  104.278429][ T5935] batman_adv: batadv0: Adding interface: batadv_slave_0
[  104.286377][ T5935] 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.
[  104.312448][ T5935] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[  104.326377][ T5935] batman_adv: batadv0: Adding interface: batadv_slave_1
[  104.333793][ T5935] 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.
[  104.359742][ T5935] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[  104.413901][ T5935] hsr_slave_0: entered promiscuous mode
[  104.420326][ T5935] hsr_slave_1: entered promiscuous mode
[  104.427096][ T5935] debugfs: 'hsr0' already exists in 'hsr'
[  104.433479][ T5935] Cannot create hsr debugfs directory
[  105.762713][   T53] Bluetooth: hci0: command tx timeout
[  106.094622][ T3725] bridge_slave_1: left allmulticast mode
[  106.100347][ T3725] bridge_slave_1: left promiscuous mode
[  106.117619][ T3725] bridge0: port 2(bridge_slave_1) entered disabled state
[  106.130483][ T3725] bridge_slave_0: left allmulticast mode
[  106.137680][ T3725] bridge_slave_0: left promiscuous mode
[  106.143603][ T3725] bridge0: port 1(bridge_slave_0) entered disabled state
[  106.420010][ T3725] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[  106.430987][ T3725] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[  106.441366][ T3725] bond0 (unregistering): Released all slaves
[  106.542574][ T3725] hsr_slave_0: left promiscuous mode
[  106.548770][ T3725] hsr_slave_1: left promiscuous mode
[  106.555531][ T3725] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[  106.565870][ T3725] batman_adv: batadv0: Removing interface: batadv_slave_0
[  106.577043][ T3725] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[  106.585311][ T3725] batman_adv: batadv0: Removing interface: batadv_slave_1
[  106.606618][ T3725] veth1_macvtap: left promiscuous mode
[  106.612407][ T3725] veth0_macvtap: left promiscuous mode
[  106.618095][ T3725] veth1_vlan: left promiscuous mode
[  106.624385][ T3725] veth0_vlan: left promiscuous mode
[  107.025784][ T3725] team0 (unregistering): Port device team_slave_1 removed
[  107.060714][ T3725] team0 (unregistering): Port device team_slave_0 removed
[  107.495110][ T5935] netdevsim netdevsim0 netdevsim0: renamed from eth0
[  107.507193][ T5935] netdevsim netdevsim0 netdevsim1: renamed from eth1
[  107.519277][ T5935] netdevsim netdevsim0 netdevsim2: renamed from eth2
[  107.533797][ T5935] netdevsim netdevsim0 netdevsim3: renamed from eth3
[  107.666105][ T5935] 8021q: adding VLAN 0 to HW filter on device bond0
[  107.690887][ T5935] 8021q: adding VLAN 0 to HW filter on device team0
[  107.706226][ T3725] bridge0: port 1(bridge_slave_0) entered blocking state
[  107.713395][ T3725] bridge0: port 1(bridge_slave_0) entered forwarding state
[  107.732360][ T3552] bridge0: port 2(bridge_slave_1) entered blocking state
[  107.739503][ T3552] bridge0: port 2(bridge_slave_1) entered forwarding state
[  107.842653][   T53] Bluetooth: hci0: command tx timeout
[  107.977246][ T5935] 8021q: adding VLAN 0 to HW filter on device batadv0
[  108.020485][ T5935] veth0_vlan: entered promiscuous mode
[  108.031847][ T5935] veth1_vlan: entered promiscuous mode
[  108.065152][ T5935] veth0_macvtap: entered promiscuous mode
[  108.075592][ T5935] veth1_macvtap: entered promiscuous mode
[  108.096634][ T5935] batman_adv: batadv0: Interface activated: batadv_slave_0
[  108.110952][ T5935] batman_adv: batadv0: Interface activated: batadv_slave_1
[  108.125629][   T12] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[  108.135466][   T12] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[  108.145125][   T12] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[  108.154706][   T12] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[  108.219057][   T12] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[  108.233555][   T12] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[  108.263229][ T3552] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[  108.271104][ T3552] 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-build3166887056=/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/ccs41tJx.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