Internal error in sys_mount cgroup: Unknown subsys name 'net' Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4045 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026 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+0x2f0/0x5f0 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 : ffff80001f1c7c80 x29: ffff80001f1c7d20 x28: 0000000000400100 x27: 00000000fffffff2 x26: 0000000000000fbf x25: 0000000000000000 x24: 0000ffffd1ae3041 x23: ffff0000c208e000 x22: 0000ffffd1ae4000 x21: dfff800000000000 x20: 00000000ffffffbf x19: 0000000000000000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80000896d52c x15: 0000ffffd1ae3041 x14: 000000000000000f x13: 1ffff0000285402b x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000ffffffffffff x9 : 0000ffffd1ae4000 x8 : 0000ffffd1ae4000 x7 : ffff8000087585b4 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 275aa77bcc541fc3 ]--- ---------------- 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 '10.128.1.221' (ED25519) to the list of known hosts. 1970/01/01 00:00:34 ignoring optional flag "type"="gce" 1970/01/01 00:00:34 parsed 1 programs [ 36.057892][ T4045] cgroup: Unknown subsys name 'net' [ 36.101324][ T4045] Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP [ 36.102638][ T4045] Modules linked in: [ 36.103281][ T4045] CPU: 1 PID: 4045 Comm: syz-executor Not tainted syzkaller #0 [ 36.104553][ T4045] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026 [ 36.106060][ T4045] pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc) [ 36.107178][ T4045] pc : __arm64_sys_mount+0x2f0/0x5f0 [ 36.107994][ T4045] lr : __arm64_sys_mount+0x2cc/0x5f0 [ 36.108894][ T4045] sp : ffff80001f1c7c80 [ 36.109562][ T4045] x29: ffff80001f1c7d20 x28: 0000000000400100 x27: 00000000fffffff2 [ 36.110820][ T4045] x26: 0000000000000fbf x25: 0000000000000000 x24: 0000ffffd1ae3041 [ 36.112062][ T4045] x23: ffff0000c208e000 x22: 0000ffffd1ae4000 x21: dfff800000000000 [ 36.113221][ T4045] x20: 00000000ffffffbf x19: 0000000000000000 x18: 0000000000000000 [ 36.114399][ T4045] x17: 0000000000000000 x16: ffff80000896d52c x15: 0000ffffd1ae3041 [ 36.115648][ T4045] x14: 000000000000000f x13: 1ffff0000285402b x12: 0000000000ff0100 [ 36.117036][ T4045] x11: 0000000000000000 x10: 0000ffffffffffff x9 : 0000ffffd1ae4000 [ 36.118323][ T4045] x8 : 0000ffffd1ae4000 x7 : ffff8000087585b4 x6 : 0000000000000000 [ 36.119549][ T4045] x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001 [ 36.120831][ T4045] x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000 [ 36.122064][ T4045] Call trace: [ 36.122630][ T4045] __arm64_sys_mount+0x2f0/0x5f0 [ 36.123358][ T4045] invoke_syscall+0x98/0x2b0 [ 36.124137][ T4045] el0_svc_common+0x138/0x258 [ 36.124934][ T4045] do_el0_svc+0x58/0x13c [ 36.125623][ T4045] el0_svc+0x78/0x1d0 [ 36.126236][ T4045] el0t_64_sync_handler+0xcc/0xe4 [ 36.127081][ T4045] el0t_64_sync+0x1a0/0x1a4 [ 36.127848][ T4045] Code: d503229f 2a1903fb 2a1903e0 38400933 (2a1b03e1) [ 36.128892][ T4045] ---[ end trace 275aa77bcc541fc3 ]--- [ 36.295111][ T4045] Kernel panic - not syncing: Oops - BTI: Fatal exception [ 36.296182][ T4045] SMP: stopping secondary CPUs [ 36.296978][ T4045] Kernel Offset: disabled [ 36.297669][ T4045] CPU features: 0x8,000003c1,7d33ffd9 [ 36.298493][ T4045] Memory Limit: none [ 36.464801][ T4045] 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-build2943015373=/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 e4bacdaf341 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=e4bacdaf3417006ad6aa0d911a44b49bb25a6e1a -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240814-175600'" "-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=\"e4bacdaf3417006ad6aa0d911a44b49bb25a6e1a\" /usr/lib/gcc-cross/aarch64-linux-gnu/14/../../../../aarch64-linux-gnu/bin/ld: /tmp/ccyH2VDn.o: in function `test_cover_filter()': executor.cc:(.text+0x1210c): warning: the use of `tempnam' is dangerous, better use `mkstemp' /usr/lib/gcc-cross/aarch64-linux-gnu/14/../../../../aarch64-linux-gnu/bin/ld: /tmp/ccyH2VDn.o: in function `Connection::Connect(char const*, char const*)': executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x2ec): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking