------------[ cut here ]------------
failed to allocate ring buffer on CPU 0
WARNING: CPU: 1 PID: 15660 at kernel/trace/ring_buffer.c:5863 trace_rb_cpu_prepare+0x349/0x3c0 kernel/trace/ring_buffer.c:5862
Modules linked in:
CPU: 1 PID: 15660 Comm: syz.6.3157 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:trace_rb_cpu_prepare+0x349/0x3c0 kernel/trace/ring_buffer.c:5862
Code: f0 48 0f ab 08 31 c0 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 56 05 fd ff 48 c7 c7 60 72 90 8a 44 89 f6 e8 97 8f c8 ff <0f> 0b b8 f4 ff ff ff eb d4 e8 39 05 fd ff 0f 0b e9 07 fd ff ff e8
RSP: 0018:ffffc90005b97a98 EFLAGS: 00010246
RAX: 13051b1d6aa99f00 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc9000c5d9000 RSI: 000000000002cea2 RDI: 000000000002cea3
RBP: ffff8880586d1200 R08: ffff8880b8f279db R09: 1ffff110171e4f3b
R10: dffffc0000000000 R11: ffffed10171e4f3c R12: ffff8880569330b0
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880586d1200
FS:  00007f3dc21df6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f796755da08 CR3: 000000004317a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 cpuhp_invoke_callback+0x481/0x7e0 kernel/cpu.c:202
 cpuhp_issue_call+0x452/0x7f0 kernel/cpu.c:-1
 __cpuhp_state_add_instance_cpuslocked+0x229/0x600 kernel/cpu.c:2078
 __cpuhp_state_add_instance+0x21/0x30 kernel/cpu.c:2099
 cpuhp_state_add_instance include/linux/cpuhotplug.h:396 [inline]
 __ring_buffer_alloc+0x336/0x5d0 kernel/trace/ring_buffer.c:1878
 allocate_trace_buffer kernel/trace/trace.c:9303 [inline]
 allocate_trace_buffers+0x70/0x2b0 kernel/trace/trace.c:9335
 trace_array_create+0x2d6/0xcb0 kernel/trace/trace.c:9478
 instance_mkdir+0xc8/0x120 kernel/trace/trace.c:9524
 tracefs_syscall_mkdir+0xb7/0x110 fs/tracefs/inode.c:87
 vfs_mkdir+0x386/0x570 fs/namei.c:4114
 do_mkdirat+0x1d8/0x440 fs/namei.c:4139
 __do_sys_mkdirat fs/namei.c:4154 [inline]
 __se_sys_mkdirat fs/namei.c:4152 [inline]
 __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4152
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3dc139e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3dc21df028 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f3dc1625fa0 RCX: 00007f3dc139e0d9
RDX: 00000000000001ff RSI: 0000200000000140 RDI: ffffffffffffff9c
RBP: 00007f3dc1435024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3dc1626038 R14: 00007f3dc1625fa0 R15: 00007ffd574daf28
 </TASK>