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: [ 14.397630][ T24] kauditd_printk_skb: 48 callbacks suppressed [ 14.397642][ T24] audit: type=1400 audit(1775305477.850:59): 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 [ 14.407675][ T24] audit: type=1400 audit(1775305477.850:60): 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 [ 14.410946][ T24] audit: type=1400 audit(1775305477.850:61): avc: denied { write } for pid=217 comm="sh" path="pipe:[14512]" dev="pipefs" ino=14512 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 14.418925][ T24] audit: type=1400 audit(1775305477.850:62): 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 [ 14.437714][ T24] audit: type=1400 audit(1775305477.850:63): 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 '10.128.1.195' (ED25519) to the list of known hosts. 2026/04/04 12:24:46 parsed 1 programs [ 23.243438][ T24] audit: type=1400 audit(1775305486.690:64): 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 [ 23.264171][ T24] audit: type=1400 audit(1775305486.690:65): 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 [ 23.283893][ T24] audit: type=1400 audit(1775305486.690:66): 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 [ 23.890879][ T24] audit: type=1400 audit(1775305487.340:67): 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 [ 23.891813][ T283] cgroup: Unknown subsys name 'net' [ 23.913561][ T24] audit: type=1400 audit(1775305487.340:68): 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 [ 23.940923][ T24] audit: type=1400 audit(1775305487.380:69): 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 [ 23.941084][ T283] cgroup: Unknown subsys name 'devices' [ 24.056972][ T283] cgroup: Unknown subsys name 'hugetlb' [ 24.062561][ T283] cgroup: Unknown subsys name 'rlimit' [ 24.324382][ T24] audit: type=1400 audit(1775305487.770:70): 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 [ 24.347697][ T24] audit: type=1400 audit(1775305487.770:71): 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 [ 24.353403][ T286] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 24.368403][ T24] audit: type=1400 audit(1775305487.770:72): 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 [ 24.397264][ T24] audit: type=1400 audit(1775305487.770:73): 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 [ 24.420919][ T283] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 24.955564][ T294] request_module fs-gadgetfs succeeded, but still no fs? [ 24.961824][ T295] bridge0: port 1(bridge_slave_0) entered blocking state [ 24.969992][ T295] bridge0: port 1(bridge_slave_0) entered disabled state [ 24.977895][ T295] device bridge_slave_0 entered promiscuous mode [ 24.984924][ T295] bridge0: port 2(bridge_slave_1) entered blocking state [ 24.992590][ T295] bridge0: port 2(bridge_slave_1) entered disabled state [ 25.000246][ T295] device bridge_slave_1 entered promiscuous mode [ 25.026455][ T293] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 25.220993][ T295] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.228091][ T295] bridge0: port 2(bridge_slave_1) entered forwarding state [ 25.235457][ T295] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.242767][ T295] bridge0: port 1(bridge_slave_0) entered forwarding state [ 25.361067][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 25.377006][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 25.384811][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 25.392474][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 25.450186][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 25.482776][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.489887][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 25.502701][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 25.511531][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.518600][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 25.526156][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 25.534150][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 25.564489][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 25.573251][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 25.581492][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 25.589174][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 25.613398][ T295] device veth0_vlan entered promiscuous mode [ 25.653604][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 25.667682][ T295] device veth1_macvtap entered promiscuous mode [ 25.686990][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 25.704940][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready 2026/04/04 12:24:49 executed programs: 0 [ 25.794156][ T354] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.801679][ T354] bridge0: port 1(bridge_slave_0) entered disabled state [ 25.809085][ T354] device bridge_slave_0 entered promiscuous mode [ 25.815829][ T354] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.822844][ T354] bridge0: port 2(bridge_slave_1) entered disabled state [ 25.830289][ T354] device bridge_slave_1 entered promiscuous mode [ 25.861575][ T354] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.868631][ T354] bridge0: port 2(bridge_slave_1) entered forwarding state [ 25.875889][ T354] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.882919][ T354] bridge0: port 1(bridge_slave_0) entered forwarding state [ 25.899422][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 25.906986][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 25.914105][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 25.927982][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 25.936185][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.943205][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 25.950913][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 25.959377][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.966529][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 25.981174][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 25.989332][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 25.997817][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 26.006481][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 26.017754][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 26.026263][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 26.037476][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 26.045423][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 26.053514][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 26.061074][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 26.069354][ T354] device veth0_vlan entered promiscuous mode [ 26.078742][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 26.086921][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 26.095993][ T354] device veth1_macvtap entered promiscuous mode [ 26.106272][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 26.113879][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 26.122178][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 26.130705][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 26.139413][ 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-build2340947178=/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 d6526ea3e6a 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/cczrk9Ez.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