Internal error in sys_mount cgroup: Unknown subsys name 'net' Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4058 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 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+0x2f0/0x5f8 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/0x5f8 fs/namespace.c:3562 sp : ffff80001ea37c80 x29: ffff80001ea37d20 x28: 0000000000400100 x27: 00000000fffffff2 x26: 0000000000000f6f x25: 0000000000000000 x24: 0000ffffc0ed9091 x23: ffff0000c906a000 x22: 0000ffffc0eda000 x21: dfff800000000000 x20: 00000000ffffff6f x19: 0000000000000000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80000897966c x15: 0000000000000000 x14: 0000000000000000 x13: 1ffff0000287202b x12: 0000000097863b1e x11: ff80800008979648 x10: 0000ffffffffffff x9 : 0000ffffc0eda000 x8 : 0000ffffc0eda000 x7 : ffff800008762580 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+0x2f0/0x5f8 fs/namespace.c:3562 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x28c arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x5c/0x140 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 88c385412eb86bc5 ]--- ---------------- 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 '10.128.0.6' (ED25519) to the list of known hosts. 1970/01/01 00:00:30 ignoring optional flag "type"="gce" 1970/01/01 00:00:30 parsed 1 programs [ 30.674553][ T4058] cgroup: Unknown subsys name 'net' [ 30.699633][ T4058] Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP [ 30.700847][ T4058] Modules linked in: [ 30.701422][ T4058] CPU: 1 PID: 4058 Comm: syz-executor Not tainted syzkaller #0 [ 30.702662][ T4058] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 30.704152][ T4058] pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc) [ 30.705322][ T4058] pc : __arm64_sys_mount+0x2f0/0x5f8 [ 30.706159][ T4058] lr : __arm64_sys_mount+0x2cc/0x5f8 [ 30.707054][ T4058] sp : ffff80001ea37c80 [ 30.707814][ T4058] x29: ffff80001ea37d20 x28: 0000000000400100 x27: 00000000fffffff2 [ 30.709284][ T4058] x26: 0000000000000f6f x25: 0000000000000000 x24: 0000ffffc0ed9091 [ 30.710802][ T4058] x23: ffff0000c906a000 x22: 0000ffffc0eda000 x21: dfff800000000000 [ 30.712321][ T4058] x20: 00000000ffffff6f x19: 0000000000000000 x18: 0000000000000000 [ 30.713733][ T4058] x17: 0000000000000000 x16: ffff80000897966c x15: 0000000000000000 [ 30.715095][ T4058] x14: 0000000000000000 x13: 1ffff0000287202b x12: 0000000097863b1e [ 30.716407][ T4058] x11: ff80800008979648 x10: 0000ffffffffffff x9 : 0000ffffc0eda000 [ 30.717669][ T4058] x8 : 0000ffffc0eda000 x7 : ffff800008762580 x6 : 0000000000000000 [ 30.718947][ T4058] x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001 [ 30.720252][ T4058] x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000 [ 30.721537][ T4058] Call trace: [ 30.722087][ T4058] __arm64_sys_mount+0x2f0/0x5f8 [ 30.722901][ T4058] invoke_syscall+0x98/0x28c [ 30.723653][ T4058] el0_svc_common+0x13c/0x258 [ 30.724443][ T4058] do_el0_svc+0x5c/0x140 [ 30.725164][ T4058] el0_svc+0x78/0x1d0 [ 30.725911][ T4058] el0t_64_sync_handler+0xcc/0xe4 [ 30.726752][ T4058] el0t_64_sync+0x1a0/0x1a4 [ 30.727476][ T4058] Code: d503229f 2a1903fb 2a1903e0 38400933 (2a1b03e1) [ 30.728688][ T4058] ---[ end trace 88c385412eb86bc5 ]--- [ 30.808475][ T4075] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k SSFS [ 30.901873][ T4058] Kernel panic - not syncing: Oops - BTI: Fatal exception [ 30.902932][ T4058] SMP: stopping secondary CPUs [ 30.903827][ T4058] Kernel Offset: disabled [ 30.904599][ T4058] CPU features: 0xa,000003c1,7d33ffd9 [ 30.905576][ T4058] Memory Limit: none [ 31.081678][ T4058] 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-build246446151=/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 edc5149ad2a 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=edc5149ad2ab7a38db6b3bcb1b594e0264a92163 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240621-090414'" "-tags=syz_target syz_os_linux syz_arch_arm64 " -o ./bin/linux_arm64/syz-fuzzer github.com/google/syzkaller/syz-fuzzer GOOS=linux GOARCH=arm64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=edc5149ad2ab7a38db6b3bcb1b594e0264a92163 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240621-090414'" "-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=\"edc5149ad2ab7a38db6b3bcb1b594e0264a92163\"