SYZFAIL: failed to recv rpc SYZFAIL: failed to recv rpc fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor) syzkaller login: [ 91.948622][ T1375] cfg80211: failed to load regulatory.db Warning: Permanently added '[localhost]:10393' (ED25519) to the list of known hosts. 2026/09/22 05:52:49 parsed 1 programs [ 97.142158][ T5283] cgroup: Unknown subsys name 'net' [ 97.198270][ T5283] cgroup: Unknown subsys name 'cpuset' [ 97.202638][ T5283] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 98.896358][ T5283] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 104.061364][ T46] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 104.068500][ T46] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 104.071116][ T46] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 104.072046][ T46] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 104.084285][ T46] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 104.428761][ T5299] soft_limit_in_bytes is deprecated and will be removed. Writing any value to this file has no effect. Please report your usecase to linux-mm@kvack.org if you depend on this functionality. [ 108.536802][ T5327] bridge0: port 1(bridge_slave_0) entered blocking state [ 108.537763][ T5327] bridge0: port 1(bridge_slave_0) entered disabled state [ 108.537888][ T5327] bridge_slave_0: entered allmulticast mode [ 108.539659][ T5327] bridge_slave_0: entered promiscuous mode [ 108.556741][ T5327] bridge0: port 2(bridge_slave_1) entered blocking state [ 108.556870][ T5327] bridge0: port 2(bridge_slave_1) entered disabled state [ 108.556945][ T5327] bridge_slave_1: entered allmulticast mode [ 108.558989][ T5327] bridge_slave_1: entered promiscuous mode [ 108.601776][ T5327] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 108.609137][ T5327] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 108.641822][ T5327] team0: Port device team_slave_0 added [ 108.647759][ T5327] team0: Port device team_slave_1 added [ 108.675701][ T5327] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 108.675743][ T5327] 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. [ 108.675759][ T5327] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 108.677892][ T5327] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 108.677905][ T5327] 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. [ 108.677921][ T5327] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 108.758286][ T5327] hsr_slave_0: entered promiscuous mode [ 108.759124][ T5327] hsr_slave_1: entered promiscuous mode [ 108.960808][ T5327] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 109.007624][ T5327] 8021q: adding VLAN 0 to HW filter on device netdevsim0 [ 109.009616][ T5327] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 109.024143][ T5327] 8021q: adding VLAN 0 to HW filter on device netdevsim1 [ 109.026997][ T5327] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 109.044070][ T5327] 8021q: adding VLAN 0 to HW filter on device netdevsim2 [ 109.046377][ T5327] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 109.050545][ T5327] 8021q: adding VLAN 0 to HW filter on device netdevsim3 [ 109.098402][ T5327] bridge0: port 2(bridge_slave_1) entered blocking state [ 109.098494][ T5327] bridge0: port 2(bridge_slave_1) entered forwarding state [ 109.098944][ T5327] bridge0: port 1(bridge_slave_0) entered blocking state [ 109.099022][ T5327] bridge0: port 1(bridge_slave_0) entered forwarding state [ 109.307032][ T5327] 8021q: adding VLAN 0 to HW filter on device bond0 [ 109.340927][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 109.347918][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 109.385252][ T5327] 8021q: adding VLAN 0 to HW filter on device team0 [ 109.413749][ T189] bridge0: port 1(bridge_slave_0) entered blocking state [ 109.413833][ T189] bridge0: port 1(bridge_slave_0) entered forwarding state [ 109.445415][ T189] bridge0: port 2(bridge_slave_1) entered blocking state [ 109.445492][ T189] bridge0: port 2(bridge_slave_1) entered forwarding state [ 110.108175][ T5327] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 110.180619][ T5327] veth0_vlan: entered promiscuous mode [ 110.194228][ T5327] veth1_vlan: entered promiscuous mode [ 110.236611][ T5327] veth0_macvtap: entered promiscuous mode [ 110.240977][ T5327] veth1_macvtap: entered promiscuous mode [ 110.275875][ T5327] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 110.290264][ T5327] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 110.346953][ T12] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 110.363544][ T67] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 110.363608][ T67] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 110.363636][ T67] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 110.677336][ T189] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 110.745079][ T189] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 110.787947][ T189] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 110.985460][ T185] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 110.985480][ T185] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 111.104965][ T12] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 111.104985][ T12] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 111.378578][ T189] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 112.708016][ T189] bridge_slave_1: left allmulticast mode [ 112.708061][ T189] bridge_slave_1: left promiscuous mode [ 112.719713][ T189] bridge0: port 2(bridge_slave_1) entered disabled state [ 112.737111][ T189] bridge_slave_0: left allmulticast mode [ 112.737136][ T189] bridge_slave_0: left promiscuous mode [ 112.737289][ T189] bridge0: port 1(bridge_slave_0) entered disabled state [ 113.091052][ T189] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 113.099144][ T189] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 113.100416][ T189] bond0 (unregistering): Released all slaves [ 113.238637][ T189] hsr_slave_0: left promiscuous mode [ 113.253887][ T189] hsr_slave_1: left promiscuous mode [ 113.259028][ T189] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 113.259086][ T189] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 113.272574][ T189] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 113.272592][ T189] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 113.330747][ T189] veth1_macvtap: left promiscuous mode [ 113.330833][ T189] veth0_macvtap: left promiscuous mode [ 113.330952][ T189] veth1_vlan: left promiscuous mode [ 113.331035][ T189] veth0_vlan: left promiscuous mode [ 114.228789][ T189] team0 (unregistering): Port device team_slave_1 removed [ 114.271875][ T189] team0 (unregistering): Port device team_slave_0 removed [ 115.947202][ T4987] 8021q: adding VLAN 0 to HW filter on device eth2 [ 117.270555][ T4987] 8021q: adding VLAN 0 to HW filter on device eth3 [ 118.302884][ T4987] 8021q: adding VLAN 0 to HW filter on device eth4 [ 119.039533][ T4987] 8021q: adding VLAN 0 to HW filter on device eth5 2026/09/22 05:53:15 executed programs: 0 [ 120.069076][ T4641] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 120.078026][ T4641] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 120.080699][ T4641] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 120.092390][ T4641] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 120.096899][ T4641] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 120.684195][ T5441] bridge0: port 1(bridge_slave_0) entered blocking state [ 120.685317][ T5441] bridge0: port 1(bridge_slave_0) entered disabled state [ 120.685406][ T5441] bridge_slave_0: entered allmulticast mode [ 120.702987][ T5441] bridge_slave_0: entered promiscuous mode [ 120.713094][ T5441] bridge0: port 2(bridge_slave_1) entered blocking state [ 120.713230][ T5441] bridge0: port 2(bridge_slave_1) entered disabled state [ 120.713301][ T5441] bridge_slave_1: entered allmulticast mode [ 120.716751][ T5441] bridge_slave_1: entered promiscuous mode [ 120.763586][ T5441] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 120.766282][ T5441] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 120.799900][ T5441] team0: Port device team_slave_0 added [ 120.801829][ T5441] team0: Port device team_slave_1 added [ 120.832031][ T5441] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 120.832046][ T5441] 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. [ 120.832060][ T5441] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 120.856099][ T5441] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 120.856113][ T5441] 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. [ 120.856128][ T5441] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 120.914904][ T5441] hsr_slave_0: entered promiscuous mode [ 120.915779][ T5441] hsr_slave_1: entered promiscuous mode [ 121.715331][ T5441] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 121.730653][ T5441] 8021q: adding VLAN 0 to HW filter on device netdevsim0 [ 121.731531][ T5441] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 121.747771][ T5441] 8021q: adding VLAN 0 to HW filter on device netdevsim1 [ 121.749454][ T5441] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 121.788312][ T5441] 8021q: adding VLAN 0 to HW filter on device netdevsim2 [ 121.790703][ T5441] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 121.820451][ T5441] 8021q: adding VLAN 0 to HW filter on device netdevsim3 [ 122.029606][ T5441] 8021q: adding VLAN 0 to HW filter on device bond0 [ 122.068596][ T5441] 8021q: adding VLAN 0 to HW filter on device team0 [ 122.085080][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 122.085222][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 122.126326][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 122.126412][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 122.174593][ T4641] Bluetooth: hci0: command tx timeout [ 122.919186][ T5441] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 123.031664][ T5441] veth0_vlan: entered promiscuous mode [ 123.048319][ T5441] veth1_vlan: entered promiscuous mode [ 123.115049][ T5441] veth0_macvtap: entered promiscuous mode [ 123.133972][ T5441] veth1_macvtap: entered promiscuous mode [ 123.180792][ T5441] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 123.208028][ T5441] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 123.285918][ T12] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 123.349733][ T1055] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 123.349788][ T1055] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 123.349809][ T1055] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 123.497102][ T185] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 123.497124][ T185] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 123.582274][ T1055] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 123.582295][ T1055] 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) [ 124.987789][ T185] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 125.345509][ T185] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 125.598827][ T185] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 125.632628][ T185] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 125.810648][ T185] bridge_slave_1: left allmulticast mode [ 125.810672][ T185] bridge_slave_1: left promiscuous mode [ 125.810842][ T185] bridge0: port 2(bridge_slave_1) entered disabled state [ 125.836966][ T185] bridge_slave_0: left allmulticast mode [ 125.836989][ T185] bridge_slave_0: left promiscuous mode [ 125.837138][ T185] bridge0: port 1(bridge_slave_0) entered disabled state [ 126.169580][ T185] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 126.179252][ T185] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 126.181328][ T185] bond0 (unregistering): Released all slaves [ 126.311523][ T4987] 8021q: adding VLAN 0 to HW filter on device eth2 [ 126.418422][ T185] hsr_slave_0: left promiscuous mode [ 126.418975][ T185] hsr_slave_1: left promiscuous mode [ 126.420852][ T185] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 126.420871][ T185] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 126.422388][ T185] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 126.422405][ T185] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 126.464077][ T185] veth1_macvtap: left promiscuous mode [ 126.465215][ T185] veth0_macvtap: left promiscuous mode [ 126.465335][ T185] veth1_vlan: left promiscuous mode [ 126.465462][ T185] veth0_vlan: left promiscuous mode [ 126.890972][ T185] team0 (unregistering): Port device team_slave_1 removed [ 126.906708][ T185] team0 (unregistering): Port device team_slave_0 removed [ 127.026409][ T4987] 8021q: adding VLAN 0 to HW filter on device eth3 [ 127.380467][ T4987] 8021q: adding VLAN 0 to HW filter on device eth4 [ 127.592145][ T4987] 8021q: adding VLAN 0 to HW filter on device eth5 syzkaller build log: go env (err=) 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-build711045761=/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='go1.26.0' GOWORK='' PKG_CONFIG='pkg-config' git status (err=) HEAD detached at e8331348a26 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=e8331348a26e30c511b7bbbd25d071a1862cf6a8 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-171008" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=e8331348a26e30c511b7bbbd25d071a1862cf6a8 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-171008" ./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=e8331348a26e30c511b7bbbd25d071a1862cf6a8 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-171008" -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=\"e8331348a26e30c511b7bbbd25d071a1862cf6a8\" /usr/bin/ld: /tmp/cc5S167J.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