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: [ 14.547707][ T24] kauditd_printk_skb: 31 callbacks suppressed [ 14.547718][ T24] audit: type=1400 audit(1788734542.080:59): 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 [ 14.560331][ T24] audit: type=1400 audit(1788734542.080:60): 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 [ 14.578896][ T24] audit: type=1400 audit(1788734542.080:61): avc: denied { write } for pid=217 comm="sh" path="pipe:[14338]" dev="pipefs" ino=14338 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 14.604643][ T24] audit: type=1400 audit(1788734542.080:62): 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 [ 14.625369][ T24] audit: type=1400 audit(1788734542.080:63): 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 '10.128.1.190' (ED25519) to the list of known hosts. 2026/09/06 22:42:31 parsed 1 programs [ 23.966929][ T24] audit: type=1400 audit(1788734551.500:64): avc: denied { node_bind } for pid=287 comm="syz-execprog" saddr=::1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:node_t tclass=tcp_socket permissive=1 [ 23.987897][ T24] audit: type=1400 audit(1788734551.500:65): avc: denied { create } for pid=287 comm="syz-execprog" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=rawip_socket permissive=1 [ 24.008536][ T24] audit: type=1400 audit(1788734551.500:66): avc: denied { module_request } for pid=287 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 [ 24.696287][ T24] audit: type=1400 audit(1788734552.220:67): avc: denied { mounton } for pid=294 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 [ 24.697467][ T294] cgroup: Unknown subsys name 'net' [ 24.720304][ T24] audit: type=1400 audit(1788734552.230:68): avc: denied { mount } for pid=294 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 [ 24.748875][ T24] audit: type=1400 audit(1788734552.260:69): avc: denied { unmount } for pid=294 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 24.749068][ T294] cgroup: Unknown subsys name 'devices' [ 24.828515][ T294] cgroup: Unknown subsys name 'hugetlb' [ 24.834278][ T294] cgroup: Unknown subsys name 'rlimit' [ 25.069394][ T24] audit: type=1400 audit(1788734552.600:70): avc: denied { setattr } for pid=294 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 [ 25.093689][ T24] audit: type=1400 audit(1788734552.600:71): avc: denied { create } for pid=294 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 25.115253][ T24] audit: type=1400 audit(1788734552.600:72): avc: denied { write } for pid=294 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 25.136776][ T24] audit: type=1400 audit(1788734552.600:73): avc: denied { read } for pid=294 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 25.142766][ T297] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). Setting up swapspace version 1, size = 127995904 bytes [ 25.223460][ T294] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 25.727172][ T304] request_module fs-gadgetfs succeeded, but still no fs? [ 25.767010][ T306] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 26.162175][ T343] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.169380][ T343] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.177865][ T343] device bridge_slave_0 entered promiscuous mode [ 26.189343][ T343] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.199963][ T343] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.220048][ T343] device bridge_slave_1 entered promiscuous mode [ 26.349193][ T343] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.357156][ T343] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.364596][ T343] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.372553][ T343] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.394483][ T333] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.401964][ T333] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.410984][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 26.419136][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 26.428560][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 26.436725][ T333] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.444091][ T333] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.453183][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 26.461759][ T333] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.469049][ T333] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.480904][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 26.490463][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 26.503259][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 26.514351][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 26.523061][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 26.531241][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 26.539450][ T343] device veth0_vlan entered promiscuous mode 2026/09/06 22:42:34 executed programs: 0 [ 26.549053][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 26.558138][ T343] device veth1_macvtap entered promiscuous mode [ 26.567591][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 26.577996][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 26.646503][ T366] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.654048][ T366] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.661893][ T366] device bridge_slave_0 entered promiscuous mode [ 26.669209][ T366] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.676263][ T366] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.683656][ T366] device bridge_slave_1 entered promiscuous mode [ 26.720086][ T366] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.727262][ T366] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.734634][ T366] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.741854][ T366] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.762908][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 26.771034][ T333] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.779190][ T333] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.795972][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 26.804472][ T333] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.812640][ T333] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.821917][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 26.830637][ T333] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.837934][ T333] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.849531][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 26.864497][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 26.877671][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 26.895918][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 26.904511][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 26.912371][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 26.921182][ T366] device veth0_vlan entered promiscuous mode [ 26.934599][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 26.944203][ T366] device veth1_macvtap entered promiscuous mode [ 26.953755][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 26.964147][ T333] 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-build3340864832=/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/ccxAloru.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