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: [ 14.772708][ T24] kauditd_printk_skb: 48 callbacks suppressed [ 14.772719][ T24] audit: type=1400 audit(1771219491.150:59): avc: denied { transition } for pid=217 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 [ 14.780260][ T24] audit: type=1400 audit(1771219491.150:60): avc: denied { noatsecure } for pid=217 comm="sshd-session" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 14.788002][ T24] audit: type=1400 audit(1771219491.150:61): avc: denied { write } for pid=217 comm="sh" path="pipe:[14116]" dev="pipefs" ino=14116 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 14.797925][ T24] audit: type=1400 audit(1771219491.150:62): avc: denied { rlimitinh } for pid=217 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 14.817417][ T24] audit: type=1400 audit(1771219491.150:63): avc: denied { siginh } for pid=217 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.0.151' (ED25519) to the list of known hosts. 2026/02/16 05:24:59 parsed 1 programs [ 23.246552][ T24] audit: type=1400 audit(1771219499.610:64): avc: denied { node_bind } for pid=275 comm="syz-execprog" saddr=::1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:node_t tclass=tcp_socket permissive=1 [ 23.267858][ T24] audit: type=1400 audit(1771219499.610:65): avc: denied { create } for pid=275 comm="syz-execprog" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=rawip_socket permissive=1 [ 23.287852][ T24] audit: type=1400 audit(1771219499.610:66): avc: denied { module_request } for pid=275 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 [ 23.862731][ T24] audit: type=1400 audit(1771219500.230:67): avc: denied { mounton } for pid=283 comm="syz-executor" path="/syzcgroup/unified" dev="sda1" ino=2023 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:root_t tclass=dir permissive=1 [ 23.863823][ T283] cgroup: Unknown subsys name 'net' [ 23.886715][ T24] audit: type=1400 audit(1771219500.230:68): avc: denied { mount } for pid=283 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 [ 23.915089][ T24] audit: type=1400 audit(1771219500.270:69): avc: denied { unmount } for pid=283 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 23.915335][ T283] cgroup: Unknown subsys name 'devices' [ 24.123360][ T283] cgroup: Unknown subsys name 'hugetlb' [ 24.129098][ T283] cgroup: Unknown subsys name 'rlimit' [ 24.272754][ T24] audit: type=1400 audit(1771219500.640:70): avc: denied { setattr } for pid=283 comm="syz-executor" name="raw-gadget" dev="devtmpfs" ino=253 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:device_t tclass=chr_file permissive=1 [ 24.296489][ T24] audit: type=1400 audit(1771219500.640:71): avc: denied { create } for pid=283 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 Setting up swapspace version 1, size = 127995904 bytes [ 24.296875][ T286] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 24.317253][ T24] audit: type=1400 audit(1771219500.640:72): avc: denied { write } for pid=283 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 24.346706][ T24] audit: type=1400 audit(1771219500.640:73): avc: denied { read } for pid=283 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 24.370315][ T283] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 24.818547][ T294] request_module fs-gadgetfs succeeded, but still no fs? [ 24.834176][ T294] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 25.299804][ T329] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.307930][ T329] bridge0: port 1(bridge_slave_0) entered disabled state [ 25.315995][ T329] device bridge_slave_0 entered promiscuous mode [ 25.323897][ T329] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.331288][ T329] bridge0: port 2(bridge_slave_1) entered disabled state [ 25.339119][ T329] device bridge_slave_1 entered promiscuous mode [ 25.464736][ T329] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.472179][ T329] bridge0: port 2(bridge_slave_1) entered forwarding state [ 25.479976][ T329] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.487838][ T329] bridge0: port 1(bridge_slave_0) entered forwarding state [ 25.509154][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 25.516996][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 25.542161][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 25.561917][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 25.575221][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 25.583992][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.591485][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 25.599389][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 25.607773][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.615196][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 25.624943][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 25.636153][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 25.652551][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 25.661006][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 25.669768][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 25.677254][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 25.685260][ T329] device veth0_vlan entered promiscuous mode [ 25.694779][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 25.704380][ T329] device veth1_macvtap entered promiscuous mode 2026/02/16 05:25:02 executed programs: 0 [ 25.714593][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 25.725274][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 25.785457][ T355] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.792718][ T355] bridge0: port 1(bridge_slave_0) entered disabled state [ 25.800083][ T355] device bridge_slave_0 entered promiscuous mode [ 25.807157][ T355] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.814766][ T355] bridge0: port 2(bridge_slave_1) entered disabled state [ 25.822313][ T355] device bridge_slave_1 entered promiscuous mode [ 25.850763][ T355] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.858262][ T355] bridge0: port 2(bridge_slave_1) entered forwarding state [ 25.866045][ T355] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.873172][ T355] bridge0: port 1(bridge_slave_0) entered forwarding state [ 25.889176][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 25.896838][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 25.904648][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 25.913926][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 25.922586][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.929862][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 25.939323][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 25.947766][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.954891][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 25.965813][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 25.974978][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 25.990913][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 26.001633][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 26.009755][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 26.017639][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 26.026762][ T355] device veth0_vlan entered promiscuous mode [ 26.042893][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 26.052765][ T355] device veth1_macvtap entered promiscuous mode [ 26.062329][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 26.072565][ T7] 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) 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-build401311437=/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=) 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/ccn1rbr0.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