Internal error in sys_mount cgroup: Unknown subsys name 'net' Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 4044 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc) pc : copy_mount_options fs/namespace.c:3255 [inline] pc : __do_sys_mount fs/namespace.c:3580 [inline] pc : __se_sys_mount fs/namespace.c:3562 [inline] pc : __arm64_sys_mount+0x2f0/0x5f0 fs/namespace.c:3562 lr : copy_mount_options fs/namespace.c:3255 [inline] lr : __do_sys_mount fs/namespace.c:3580 [inline] lr : __se_sys_mount fs/namespace.c:3562 [inline] lr : __arm64_sys_mount+0x2cc/0x5f0 fs/namespace.c:3562 sp : ffff80001f187c80 x29: ffff80001f187d20 x28: 0000000000400100 x27: 00000000fffffff2 x26: 0000000000000f8f x25: 0000000000000000 x24: 0000ffffc18af071 x23: ffff0000dac36000 x22: 0000ffffc18b0000 x21: dfff800000000000 x20: 00000000ffffff8f x19: 0000000000000000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80000896c9ac x15: 0000000000000000 x14: 0000000000000000 x13: 1ffff0000285202b x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000ffffffffffff x9 : 0000ffffc18b0000 x8 : 0000ffffc18b0000 x7 : ffff800008758124 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001 x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000 Call trace: copy_mount_options fs/namespace.c:3255 [inline] __do_sys_mount fs/namespace.c:3580 [inline] __se_sys_mount fs/namespace.c:3562 [inline] __arm64_sys_mount+0x2f0/0x5f0 fs/namespace.c:3562 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1d0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Code: d503229f 2a1903fb 2a1903e0 38400933 (2a1b03e1) ---[ end trace e11d65e909b4addb ]--- ---------------- Code disassembly (best guess): 0: d503229f csdb 4: 2a1903fb mov w27, w25 8: 2a1903e0 mov w0, w25 c: 38400933 ldtrb w19, [x9] * 10: 2a1b03e1 mov w1, w27 <-- trapping instruction Warning: Permanently added '10.128.1.208' (ED25519) to the list of known hosts. 1970/01/01 00:00:28 ignoring optional flag "type"="gce" 1970/01/01 00:00:28 parsed 1 programs [ 28.520655][ T4044] cgroup: Unknown subsys name 'net' [ 28.556992][ T4044] Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP [ 28.558205][ T4044] Modules linked in: [ 28.558760][ T4044] CPU: 0 PID: 4044 Comm: syz-executor Not tainted syzkaller #0 [ 28.559842][ T4044] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 [ 28.561267][ T4044] pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc) [ 28.562394][ T4044] pc : __arm64_sys_mount+0x2f0/0x5f0 [ 28.563162][ T4044] lr : __arm64_sys_mount+0x2cc/0x5f0 [ 28.563916][ T4044] sp : ffff80001f187c80 [ 28.564507][ T4044] x29: ffff80001f187d20 x28: 0000000000400100 x27: 00000000fffffff2 [ 28.565657][ T4044] x26: 0000000000000f8f x25: 0000000000000000 x24: 0000ffffc18af071 [ 28.566850][ T4044] x23: ffff0000dac36000 x22: 0000ffffc18b0000 x21: dfff800000000000 [ 28.568068][ T4044] x20: 00000000ffffff8f x19: 0000000000000000 x18: 0000000000000000 [ 28.569247][ T4044] x17: 0000000000000000 x16: ffff80000896c9ac x15: 0000000000000000 [ 28.570421][ T4044] x14: 0000000000000000 x13: 1ffff0000285202b x12: 0000000000ff0100 [ 28.571605][ T4044] x11: 0000000000000000 x10: 0000ffffffffffff x9 : 0000ffffc18b0000 [ 28.572813][ T4044] x8 : 0000ffffc18b0000 x7 : ffff800008758124 x6 : 0000000000000000 [ 28.574157][ T4044] x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001 [ 28.575455][ T4044] x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000 [ 28.576736][ T4044] Call trace: [ 28.577254][ T4044] __arm64_sys_mount+0x2f0/0x5f0 [ 28.578011][ T4044] invoke_syscall+0x98/0x2b0 [ 28.578731][ T4044] el0_svc_common+0x138/0x258 [ 28.579447][ T4044] do_el0_svc+0x58/0x13c [ 28.580102][ T4044] el0_svc+0x78/0x1d0 [ 28.580704][ T4044] el0t_64_sync_handler+0xcc/0xe4 [ 28.581442][ T4044] el0t_64_sync+0x1a0/0x1a4 [ 28.582109][ T4044] Code: d503229f 2a1903fb 2a1903e0 38400933 (2a1b03e1) [ 28.583139][ T4044] ---[ end trace e11d65e909b4addb ]--- [ 28.776363][ T4044] Kernel panic - not syncing: Oops - BTI: Fatal exception [ 28.777367][ T4044] SMP: stopping secondary CPUs [ 28.778026][ T4044] Kernel Offset: disabled [ 28.778666][ T4044] CPU features: 0x8,000003c1,7d33ffd9 [ 28.779436][ T4044] Memory Limit: none [ 28.981472][ T4044] Rebooting in 86400 seconds.. 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-build837079537=/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='go1.24.4' GOWORK='' PKG_CONFIG='pkg-config' git status (err=) HEAD detached at 757f06b1fa 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}}' ./sys/syz-sysgen | grep -q false || go install ./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 go fmt ./sys/... >/dev/null touch .descriptions GOOS=linux GOARCH=arm64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=757f06b1fadfe22cb3ac5f4f36e8e894eb78bb08 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240628-121625'" "-tags=syz_target syz_os_linux syz_arch_arm64 " -o ./bin/linux_arm64/syz-execprog github.com/google/syzkaller/tools/syz-execprog mkdir -p ./bin/linux_arm64 aarch64-linux-gnu-g++ -o ./bin/linux_arm64/syz-executor executor/executor.cc \ -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 -fpermissive -w -DGOOS_linux=1 -DGOARCH_arm64=1 \ -DHOSTGOOS_linux=1 -DGIT_REVISION=\"757f06b1fadfe22cb3ac5f4f36e8e894eb78bb08\" /usr/lib/gcc-cross/aarch64-linux-gnu/14/../../../../aarch64-linux-gnu/bin/ld: /tmp/ccDAfN6I.o: in function `test_cover_filter()': executor.cc:(.text+0xfa10): warning: the use of `tempnam' is dangerous, better use `mkstemp' /usr/lib/gcc-cross/aarch64-linux-gnu/14/../../../../aarch64-linux-gnu/bin/ld: /tmp/ccDAfN6I.o: in function `Connection::Connect(char const*, char const*)': executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x148): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking # Temporal hack to pre-created removed syz-fuzzer, # since old version of syz-ci still wants to copy it. touch ./bin/linux_arm64/syz-fuzzer