Internal error in sys_mount cgroup: Unknown subsys name 'net' Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4052 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc) pc : copy_mount_options fs/namespace.c:3246 [inline] pc : __do_sys_mount fs/namespace.c:3571 [inline] pc : __se_sys_mount fs/namespace.c:3553 [inline] pc : __arm64_sys_mount+0x2f8/0x5e4 fs/namespace.c:3553 lr : copy_mount_options fs/namespace.c:3246 [inline] lr : __do_sys_mount fs/namespace.c:3571 [inline] lr : __se_sys_mount fs/namespace.c:3553 [inline] lr : __arm64_sys_mount+0x2d4/0x5e4 fs/namespace.c:3553 sp : ffff80001f0e7c80 x29: ffff80001f0e7d20 x28: 00000000fffffff2 x27: 0000ffffdaee8000 x26: ffff0000c54e0000 x25: 0000000000000000 x24: 0000ffffdaee7131 x23: ffff0000c2c68000 x22: 0000000000000ecf x21: dfff800000000000 x20: 00000000fffffecf x19: 0000000000000000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff800008965790 x15: 0000ffffdaee7131 x14: 0000000000000000 x13: 1ffff0000283006b x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000ffffffffffff x9 : 0000ffffdaee8000 x8 : 0000ffffdaee8000 x7 : ffff800008751314 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001 x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000 Call trace: copy_mount_options fs/namespace.c:3246 [inline] __do_sys_mount fs/namespace.c:3571 [inline] __se_sys_mount fs/namespace.c:3553 [inline] __arm64_sys_mount+0x2f8/0x5e4 fs/namespace.c:3553 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 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 2a1903fc 2a1903e0 38400933 (2a1c03e1) ---[ end trace 625e5963b260c439 ]--- ---------------- Code disassembly (best guess): 0: d503229f csdb 4: 2a1903fc mov w28, w25 8: 2a1903e0 mov w0, w25 c: 38400933 ldtrb w19, [x9] * 10: 2a1c03e1 mov w1, w28 <-- trapping instruction Warning: Permanently added '10.128.1.245' (ED25519) to the list of known hosts. 1970/01/01 00:00:30 parsed 1 programs [ 31.605075][ T4052] cgroup: Unknown subsys name 'net' [ 31.686202][ T4052] Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP [ 31.687425][ T4052] Modules linked in: [ 31.688039][ T4052] CPU: 1 PID: 4052 Comm: syz-executor Not tainted syzkaller #0 [ 31.689229][ T4052] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 [ 31.690725][ T4052] pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc) [ 31.691918][ T4052] pc : __arm64_sys_mount+0x2f8/0x5e4 [ 31.692644][ T4052] lr : __arm64_sys_mount+0x2d4/0x5e4 [ 31.693389][ T4052] sp : ffff80001f0e7c80 [ 31.693962][ T4052] x29: ffff80001f0e7d20 x28: 00000000fffffff2 x27: 0000ffffdaee8000 [ 31.695088][ T4052] x26: ffff0000c54e0000 x25: 0000000000000000 x24: 0000ffffdaee7131 [ 31.696357][ T4052] x23: ffff0000c2c68000 x22: 0000000000000ecf x21: dfff800000000000 [ 31.697654][ T4052] x20: 00000000fffffecf x19: 0000000000000000 x18: 0000000000000000 [ 31.698894][ T4052] x17: 0000000000000000 x16: ffff800008965790 x15: 0000ffffdaee7131 [ 31.700025][ T4052] x14: 0000000000000000 x13: 1ffff0000283006b x12: 0000000000ff0100 [ 31.701180][ T4052] x11: 0000000000000000 x10: 0000ffffffffffff x9 : 0000ffffdaee8000 [ 31.702448][ T4052] x8 : 0000ffffdaee8000 x7 : ffff800008751314 x6 : 0000000000000000 [ 31.703692][ T4052] x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001 [ 31.704944][ T4052] x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000 [ 31.706271][ T4052] Call trace: [ 31.706801][ T4052] __arm64_sys_mount+0x2f8/0x5e4 [ 31.707589][ T4052] invoke_syscall+0x98/0x2b8 [ 31.708267][ T4052] el0_svc_common+0x138/0x258 [ 31.708989][ T4052] do_el0_svc+0x58/0x14c [ 31.709667][ T4052] el0_svc+0x78/0x1e0 [ 31.710296][ T4052] el0t_64_sync_handler+0xcc/0xe4 [ 31.711077][ T4052] el0t_64_sync+0x1a0/0x1a4 [ 31.711743][ T4052] Code: d503229f 2a1903fc 2a1903e0 38400933 (2a1c03e1) [ 31.712756][ T4052] ---[ end trace 625e5963b260c439 ]--- [ 31.921665][ T4052] Kernel panic - not syncing: Oops - BTI: Fatal exception [ 31.922787][ T4052] SMP: stopping secondary CPUs [ 31.923547][ T4052] Kernel Offset: disabled [ 31.924260][ T4052] CPU features: 0x8,000003c1,7d33ffd9 [ 31.925107][ T4052] Memory Limit: none [ 32.107738][ T4052] 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-build1066078235=/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 1804e95e3f 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=1804e95e3ff848c11e87e8efe7560f03c011c081 -X github.com/google/syzkaller/prog.gitRevisionDate=20250814-193721" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=1804e95e3ff848c11e87e8efe7560f03c011c081 -X github.com/google/syzkaller/prog.gitRevisionDate=20250814-193721" ./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=arm64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=1804e95e3ff848c11e87e8efe7560f03c011c081 -X github.com/google/syzkaller/prog.gitRevisionDate=20250814-193721" -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 -DGOOS_linux=1 -DGOARCH_arm64=1 \ -DHOSTGOOS_linux=1 -DGIT_REVISION=\"1804e95e3ff848c11e87e8efe7560f03c011c081\" /usr/lib/gcc-cross/aarch64-linux-gnu/12/../../../../aarch64-linux-gnu/bin/ld: /tmp/ccamcKM2.o: in function `Connection::Connect(char const*, char const*)': executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0xd8): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking