------------[ cut here ]------------
failed to allocate ring buffer on CPU 1
WARNING: kernel/trace/ring_buffer.c:8110 at trace_rb_cpu_prepare+0x32c/0x3c8 kernel/trace/ring_buffer.c:8109, CPU#0: syz.3.14/4935
Modules linked in:
CPU: 0 UID: 0 PID: 4935 Comm: syz.3.14 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026
pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : trace_rb_cpu_prepare+0x32c/0x3c8 kernel/trace/ring_buffer.c:8109
lr : trace_rb_cpu_prepare+0x32c/0x3c8 kernel/trace/ring_buffer.c:8109
sp : ffff8000991d76c0
x29: ffff8000991d76d0 x28: 1fffe00019716a95 x27: 0000000000000001
x26: 0000000000000000 x25: dfff800000000000 x24: 0000000000000000
x23: ffff0000cb6a8988 x22: 1fffe00019716a82 x21: ffff0000cb6a8988
x20: ffff0000cb8b5410 x19: 0000000000000001 x18: 00000000ffffffff
x17: 0000000000000003 x16: ffff800089797000 x15: ffff800080cd3590
x14: 0000000000000815 x13: 0000000000000001 x12: 0000000000000003
x11: 0000000000000000 x10: 0000000000080000 x9 : 4e94c20940df7e00
x8 : 4e94c20940df7e00 x7 : ffff800080483084 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f3d68
x2 : 0000000100000000 x1 : ffff0000cd10d880 x0 : 0000000000000001
Call trace:
 trace_rb_cpu_prepare+0x32c/0x3c8 kernel/trace/ring_buffer.c:8109 (P)
 cpuhp_invoke_callback+0x3ec/0x6cc kernel/cpu.c:204
 cpuhp_issue_call+0x2b0/0x3e8 kernel/cpu.c:-1
 __cpuhp_state_add_instance_cpuslocked+0x164/0x2d4 kernel/cpu.c:2423
 __cpuhp_state_add_instance+0x38/0x58 kernel/cpu.c:2444
 cpuhp_state_add_instance include/linux/cpuhotplug.h:377 [inline]
 alloc_buffer+0x604/0x99c kernel/trace/ring_buffer.c:2916
 __ring_buffer_alloc+0x48/0x5c kernel/trace/ring_buffer.c:2958
 allocate_trace_buffer+0x194/0x7fc kernel/trace/trace.c:8509
 allocate_trace_buffers kernel/trace/trace.c:8542 [inline]
 trace_array_create_systems+0x438/0x78c kernel/trace/trace.c:8720
 trace_array_create kernel/trace/trace.c:8763 [inline]
 instance_mkdir+0x64/0xac kernel/trace/trace.c:8778
 tracefs_syscall_mkdir+0x104/0x17c fs/tracefs/inode.c:121
 vfs_mkdir+0x2e4/0x46c fs/namei.c:5439
 filename_mkdirat+0x228/0x3f4 fs/namei.c:5472
 __do_sys_mkdirat fs/namei.c:5493 [inline]
 __se_sys_mkdirat fs/namei.c:5490 [inline]
 __arm64_sys_mkdirat+0x9c/0xc0 fs/namei.c:5490
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796
 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606
irq event stamp: 2164
hardirqs last  enabled at (2163): [<ffff80008048661c>] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385
hardirqs last disabled at (2164): [<ffff80008687d454>] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483
softirqs last  enabled at (598): [<ffff80008013aacc>] local_bh_enable include/linux/bottom_half.h:33 [inline]
softirqs last  enabled at (598): [<ffff80008013aacc>] put_cpu_fpsimd_context arch/arm64/kernel/fpsimd.c:251 [inline]
softirqs last  enabled at (598): [<ffff80008013aacc>] fpsimd_restore_current_state+0x39c/0x9c8 arch/arm64/kernel/fpsimd.c:1781
softirqs last disabled at (596): [<ffff80008013a774>] local_bh_disable include/linux/bottom_half.h:20 [inline]
softirqs last disabled at (596): [<ffff80008013a774>] get_cpu_fpsimd_context arch/arm64/kernel/fpsimd.c:234 [inline]
softirqs last disabled at (596): [<ffff80008013a774>] fpsimd_restore_current_state+0x44/0x9c8 arch/arm64/kernel/fpsimd.c:1774
---[ end trace 0000000000000000 ]---