Internal error in sys_mount

cgroup: Unknown subsys name 'net'
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4056 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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 : ffff80001f5e7c80
x29: ffff80001f5e7d20 x28: 0000000000400100 x27: 00000000fffffff2
x26: 0000000000000cff x25: 0000000000000000 x24: 0000ffffc3d60301
x23: ffff0000d997a000 x22: 0000ffffc3d61000 x21: dfff800000000000
x20: 00000000fffffcff x19: 0000000000000000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff80000896e41c x15: 0000000000000000
x14: 0000000000000000 x13: 1ffff0000285402b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000ffffffffffff x9 : 0000ffffc3d61000
x8 : 0000ffffc3d61000 x7 : ffff800008758fbc 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 9c0f4979eca0d4af ]---
----------------
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 '10.128.0.74' (ED25519) to the list of known hosts.
1970/01/01 00:00:29 ignoring optional flag "type"="gce"
1970/01/01 00:00:29 parsed 1 programs
syzkaller login: [   29.694721][ T4056] cgroup: Unknown subsys name 'net'
[   29.737415][ T4056] Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
[   29.738777][ T4056] Modules linked in:
[   29.739435][ T4056] CPU: 0 PID: 4056 Comm: syz-executor Not tainted syzkaller #0
[   29.740675][ T4056] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
[   29.742382][ T4056] pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
[   29.743631][ T4056] pc : __arm64_sys_mount+0x2f0/0x5f0
[   29.744516][ T4056] lr : __arm64_sys_mount+0x2cc/0x5f0
[   29.745382][ T4056] sp : ffff80001f5e7c80
[   29.746111][ T4056] x29: ffff80001f5e7d20 x28: 0000000000400100 x27: 00000000fffffff2
[   29.747452][ T4056] x26: 0000000000000cff x25: 0000000000000000 x24: 0000ffffc3d60301
[   29.748810][ T4056] x23: ffff0000d997a000 x22: 0000ffffc3d61000 x21: dfff800000000000
[   29.750192][ T4056] x20: 00000000fffffcff x19: 0000000000000000 x18: 0000000000000000
[   29.751533][ T4056] x17: 0000000000000000 x16: ffff80000896e41c x15: 0000000000000000
[   29.752946][ T4056] x14: 0000000000000000 x13: 1ffff0000285402b x12: 0000000000ff0100
[   29.754292][ T4056] x11: 0000000000000000 x10: 0000ffffffffffff x9 : 0000ffffc3d61000
[   29.755680][ T4056] x8 : 0000ffffc3d61000 x7 : ffff800008758fbc x6 : 0000000000000000
[   29.757107][ T4056] x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
[   29.758460][ T4056] x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
[   29.759754][ T4056] Call trace:
[   29.760324][ T4056]  __arm64_sys_mount+0x2f0/0x5f0
[   29.761152][ T4056]  invoke_syscall+0x98/0x2b0
[   29.761914][ T4056]  el0_svc_common+0x138/0x258
[   29.762683][ T4056]  do_el0_svc+0x58/0x13c
[   29.763355][ T4056]  el0_svc+0x78/0x1d0
[   29.763982][ T4056]  el0t_64_sync_handler+0xcc/0xe4
[   29.764838][ T4056]  el0t_64_sync+0x1a0/0x1a4
[   29.765604][ T4056] Code: d503229f 2a1903fb 2a1903e0 38400933 (2a1b03e1) 
[   29.766726][ T4056] ---[ end trace 9c0f4979eca0d4af ]---
[   29.948434][ T4056] Kernel panic - not syncing: Oops - BTI: Fatal exception
[   29.949573][ T4056] SMP: stopping secondary CPUs
[   29.950429][ T4056] Kernel Offset: disabled
[   29.951088][ T4056] CPU features: 0x8,000003c1,7d33ffd9
[   29.951970][ T4056] Memory Limit: none
[   30.177478][ T4056] Rebooting in 86400 seconds..


syzkaller build log:
go env (err=<nil>)
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-build3931085247=/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=<nil>)
HEAD detached at 79782afcff
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:32: run command via tools/syz-env for best compatibility, see:
Makefile:33: 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
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=arm64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=79782afcff30fd0c0af8c2725d508b2c7150f3ed -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230620-191008'" "-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=79782afcff30fd0c0af8c2725d508b2c7150f3ed -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230620-191008'" "-tags=syz_target syz_os_linux syz_arch_arm64 " -o ./bin/linux_arm64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
GOOS=linux GOARCH=arm64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=79782afcff30fd0c0af8c2725d508b2c7150f3ed -X 'github.com/google/syzkaller/prog.gitRevisionDate=20230620-191008'" "-tags=syz_target syz_os_linux syz_arch_arm64 " -o ./bin/linux_arm64/syz-stress github.com/google/syzkaller/tools/syz-stress
mkdir -p ./bin/linux_arm64
aarch64-linux-gnu-gcc -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 -fpermissive -w -DGOOS_linux=1 -DGOARCH_arm64=1 \
	-DHOSTGOOS_linux=1 -DGIT_REVISION=\"79782afcff30fd0c0af8c2725d508b2c7150f3ed\"