SYZFAIL: failed to recv rpc SYZFAIL: failed to recv rpc fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor) syzkaller syzkaller login: [ 22.175394][ T30] kauditd_printk_skb: 47 callbacks suppressed [ 22.175409][ T30] audit: type=1400 audit(1779760980.816:59): avc: denied { transition } for pid=251 comm="sshd-session" path="/bin/sh" dev="sda1" ino=90 scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 22.187373][ T30] audit: type=1400 audit(1779760980.816:60): avc: denied { noatsecure } for pid=251 comm="sshd-session" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 22.192315][ T30] audit: type=1400 audit(1779760980.816:61): avc: denied { write } for pid=251 comm="sh" path="pipe:[14783]" dev="pipefs" ino=14783 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 22.213501][ T30] audit: type=1400 audit(1779760980.816:62): avc: denied { rlimitinh } for pid=251 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 22.237598][ T30] audit: type=1400 audit(1779760980.816:63): avc: denied { siginh } for pid=251 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.0.139' (ED25519) to the list of known hosts. 2026/05/26 02:03:11 parsed 1 programs [ 33.059620][ T30] audit: type=1400 audit(1779760991.706:64): avc: denied { node_bind } for pid=293 comm="syz-execprog" saddr=::1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:node_t tclass=tcp_socket permissive=1 [ 33.080971][ T30] audit: type=1400 audit(1779760991.706:65): avc: denied { module_request } for pid=293 comm="syz-execprog" kmod="net-pf-2-proto-262-type-1" scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:kernel_t tclass=system permissive=1 [ 33.739595][ T30] audit: type=1400 audit(1779760992.386:66): avc: denied { mounton } for pid=302 comm="syz-executor" path="/syzcgroup/unified" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:root_t tclass=dir permissive=1 [ 33.742039][ T302] cgroup: Unknown subsys name 'net' [ 33.767255][ T30] audit: type=1400 audit(1779760992.386:67): avc: denied { mount } for pid=302 comm="syz-executor" name="/" dev="cgroup2" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 33.798806][ T30] audit: type=1400 audit(1779760992.426:68): avc: denied { unmount } for pid=302 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 33.799251][ T302] cgroup: Unknown subsys name 'devices' [ 33.951346][ T302] cgroup: Unknown subsys name 'hugetlb' [ 33.957975][ T302] cgroup: Unknown subsys name 'rlimit' [ 34.109950][ T30] audit: type=1400 audit(1779760992.756:69): avc: denied { setattr } for pid=302 comm="syz-executor" name="raw-gadget" dev="devtmpfs" ino=254 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:device_t tclass=chr_file permissive=1 [ 34.139405][ T30] audit: type=1400 audit(1779760992.756:70): avc: denied { create } for pid=302 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 34.164525][ T30] audit: type=1400 audit(1779760992.756:71): avc: denied { write } for pid=302 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 34.170863][ T304] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). Setting up swapspace version 1, size = 127995904 bytes [ 34.195550][ T30] audit: type=1400 audit(1779760992.756:72): avc: denied { read } for pid=302 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 34.231056][ T30] audit: type=1400 audit(1779760992.756:73): avc: denied { mounton } for pid=302 comm="syz-executor" path="/proc/sys/fs/binfmt_misc" dev="binfmt_misc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:binfmt_misc_fs_t tclass=dir permissive=1 [ 34.288212][ T302] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 34.812730][ T311] request_module fs-gadgetfs succeeded, but still no fs? [ 34.932415][ T310] syz-executor (310) used greatest stack depth: 21696 bytes left [ 35.094893][ T332] bridge0: port 1(bridge_slave_0) entered blocking state [ 35.102120][ T332] bridge0: port 1(bridge_slave_0) entered disabled state [ 35.110864][ T332] device bridge_slave_0 entered promiscuous mode [ 35.141348][ T332] bridge0: port 2(bridge_slave_1) entered blocking state [ 35.148500][ T332] bridge0: port 2(bridge_slave_1) entered disabled state [ 35.161498][ T332] device bridge_slave_1 entered promiscuous mode [ 35.478346][ T332] bridge0: port 2(bridge_slave_1) entered blocking state [ 35.487138][ T332] bridge0: port 2(bridge_slave_1) entered forwarding state [ 35.497096][ T332] bridge0: port 1(bridge_slave_0) entered blocking state [ 35.504441][ T332] bridge0: port 1(bridge_slave_0) entered forwarding state [ 35.534630][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 35.544832][ T328] bridge0: port 1(bridge_slave_0) entered disabled state [ 35.553562][ T328] bridge0: port 2(bridge_slave_1) entered disabled state [ 35.578829][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 35.587706][ T328] bridge0: port 1(bridge_slave_0) entered blocking state [ 35.595349][ T328] bridge0: port 1(bridge_slave_0) entered forwarding state [ 35.604006][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 35.613158][ T328] bridge0: port 2(bridge_slave_1) entered blocking state [ 35.620616][ T328] bridge0: port 2(bridge_slave_1) entered forwarding state [ 35.638421][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 35.648587][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 35.657607][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 35.668262][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 35.677299][ T332] device veth0_vlan entered promiscuous mode [ 35.684724][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 35.694264][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 35.707128][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 35.717600][ T332] device veth1_macvtap entered promiscuous mode [ 35.728333][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready 2026/05/26 02:03:14 executed programs: 0 [ 35.738106][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 35.821179][ T372] bridge0: port 1(bridge_slave_0) entered blocking state [ 35.829047][ T372] bridge0: port 1(bridge_slave_0) entered disabled state [ 35.836577][ T372] device bridge_slave_0 entered promiscuous mode [ 35.843810][ T372] bridge0: port 2(bridge_slave_1) entered blocking state [ 35.851331][ T372] bridge0: port 2(bridge_slave_1) entered disabled state [ 35.858752][ T372] device bridge_slave_1 entered promiscuous mode [ 35.896337][ T372] bridge0: port 2(bridge_slave_1) entered blocking state [ 35.903428][ T372] bridge0: port 2(bridge_slave_1) entered forwarding state [ 35.911112][ T372] bridge0: port 1(bridge_slave_0) entered blocking state [ 35.918891][ T372] bridge0: port 1(bridge_slave_0) entered forwarding state [ 35.927243][ T328] bridge0: port 1(bridge_slave_0) entered disabled state [ 35.935322][ T328] bridge0: port 2(bridge_slave_1) entered disabled state [ 35.954933][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 35.963276][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 35.972596][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 35.981582][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 35.990175][ T328] bridge0: port 1(bridge_slave_0) entered blocking state [ 35.997338][ T328] bridge0: port 1(bridge_slave_0) entered forwarding state [ 36.005919][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 36.014513][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 36.023672][ T328] bridge0: port 2(bridge_slave_1) entered blocking state [ 36.031059][ T328] bridge0: port 2(bridge_slave_1) entered forwarding state [ 36.042648][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 36.051202][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 36.066980][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 36.075538][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 36.087960][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 36.097793][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 36.114568][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 36.122703][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 36.131041][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 36.138489][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 36.147077][ T372] device veth0_vlan entered promiscuous mode [ 36.162736][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 36.171095][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 36.181132][ T372] device veth1_macvtap entered promiscuous mode [ 36.197142][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 36.205343][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 36.214320][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 36.223898][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 36.232330][ T328] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready SYZFAIL: failed to recv rpc fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor) [ 36.305901][ T332] syz-executor (332) used greatest stack depth: 21408 bytes left 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-build3328912366=/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=) 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/cc09VDpT.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