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: [ 15.140214][ T24] kauditd_printk_skb: 31 callbacks suppressed [ 15.140226][ T24] audit: type=1400 audit(1786816030.910:59): 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 [ 15.159332][ T24] audit: type=1400 audit(1786816030.910:60): 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 [ 15.194522][ T24] audit: type=1400 audit(1786816030.910:61): avc: denied { write } for pid=217 comm="sh" path="pipe:[1296]" dev="pipefs" ino=1296 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 15.227856][ T24] audit: type=1400 audit(1786816030.910:62): 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 [ 15.249528][ T24] audit: type=1400 audit(1786816030.910:63): 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 '10.128.1.100' (ED25519) to the list of known hosts. 2026/08/15 17:47:20 parsed 1 programs [ 25.170797][ T24] audit: type=1400 audit(1786816040.940:64): 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 [ 25.195364][ T24] audit: type=1400 audit(1786816040.940:65): 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 [ 25.216459][ T24] audit: type=1400 audit(1786816040.940:66): 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 [ 25.874451][ T24] audit: type=1400 audit(1786816041.640:67): avc: denied { mounton } for pid=295 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 [ 25.875647][ T295] cgroup: Unknown subsys name 'net' [ 25.898371][ T24] audit: type=1400 audit(1786816041.640:68): avc: denied { mount } for pid=295 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 [ 25.926556][ T24] audit: type=1400 audit(1786816041.670:69): avc: denied { unmount } for pid=295 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 25.926758][ T295] cgroup: Unknown subsys name 'devices' [ 26.041075][ T295] cgroup: Unknown subsys name 'hugetlb' [ 26.047014][ T295] cgroup: Unknown subsys name 'rlimit' [ 26.163129][ T24] audit: type=1400 audit(1786816041.930:70): avc: denied { setattr } for pid=295 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 Setting up swapspace version 1, size = 127995904 bytes [ 26.196433][ T298] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 26.203331][ T24] audit: type=1400 audit(1786816041.930:71): avc: denied { create } for pid=295 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 26.253305][ T24] audit: type=1400 audit(1786816041.930:72): avc: denied { write } for pid=295 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 26.253411][ T295] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 26.280638][ T24] audit: type=1400 audit(1786816041.930:73): avc: denied { read } for pid=295 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 27.030032][ T307] request_module fs-gadgetfs succeeded, but still no fs? [ 27.052289][ T308] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 27.432217][ T328] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.440217][ T328] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.455109][ T328] device bridge_slave_0 entered promiscuous mode [ 27.520720][ T328] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.528271][ T328] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.536048][ T328] device bridge_slave_1 entered promiscuous mode [ 27.604299][ T328] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.611513][ T328] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.618871][ T328] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.626558][ T328] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.651839][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 27.660200][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 27.669046][ T337] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.710990][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 27.720048][ T337] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.727360][ T337] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.735069][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 27.745249][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 27.763256][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 27.776075][ T328] device veth0_vlan entered promiscuous mode [ 27.783473][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 27.794004][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 27.802607][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready 2026/08/15 17:47:23 executed programs: 0 [ 27.817241][ T328] device veth1_macvtap entered promiscuous mode [ 27.824815][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 27.836513][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 27.846977][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 27.941525][ T368] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.949983][ T368] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.958291][ T368] device bridge_slave_0 entered promiscuous mode [ 27.967240][ T368] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.976208][ T368] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.984338][ T368] device bridge_slave_1 entered promiscuous mode [ 28.028439][ T368] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.039432][ T368] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.050957][ T368] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.059043][ T368] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.077407][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 28.089008][ T337] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.098189][ T337] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.110178][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 28.121368][ T337] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.130966][ T337] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.141970][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 28.153980][ T337] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.162497][ T337] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.176963][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 28.192087][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 28.206556][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 28.224222][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 28.233725][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 28.242198][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 28.255134][ T368] device veth0_vlan entered promiscuous mode [ 28.265889][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 28.276827][ T368] device veth1_macvtap entered promiscuous mode [ 28.287243][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 28.302127][ T337] 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-build3712765600=/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 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/ccfF4RGH.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