------------[ cut here ]------------
WARNING: CPU: 0 PID: 18815 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 18815 Comm: syz.3.4661 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 7d 94 d8 ff 85 db 48 c7 c0 f2 ff ff ff 49 0f 44 c6 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 00 91 d8 ff <0f> 0b e9 1c ff ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c ea fe
RSP: 0000:ffffc900000079d8 EFLAGS: 00010246
RAX: ffffffff81a07ea0 RBX: 0000000000000008 RCX: ffff88801e2a0000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88801e2a0007 R09: 1ffff11003c54000
R10: dffffc0000000000 R11: ffffed1003c54001 R12: ffff88801e2a1788
R13: 00007ffffffff000 R14: ffffc90000007a48 R15: 0000000000000000
FS:  0000555576c4f500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc1aa186570 CR3: 000000001e419000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
 ____bpf_probe_read_compat kernel/trace/bpf_trace.c:281 [inline]
 bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
 bpf_prog_ea44d77e194c9431+0x35/0xc88
 bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline]
 __bpf_prog_run include/linux/filter.h:628 [inline]
 bpf_prog_run include/linux/filter.h:635 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1878 [inline]
 bpf_trace_run3+0x19e/0x350 kernel/trace/bpf_trace.c:1916
 __bpf_trace_kmem_cache_free+0x99/0xc0 include/trace/events/kmem.h:138
 trace_kmem_cache_free include/trace/events/kmem.h:138 [inline]
 kmem_cache_free+0x1e7/0x210 mm/slub.c:3521
 rcu_do_batch kernel/rcu/tree.c:2523 [inline]
 rcu_core+0x9d2/0x1670 kernel/rcu/tree.c:2763
 handle_softirqs+0x339/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:do_user_addr_fault+0x1af/0xc80 arch/x86/mm/fault.c:1256
Code: 5c 24 18 48 8b 1b 48 89 de 48 83 e6 03 31 ff e8 27 ae 43 00 48 83 e3 03 74 12 e8 3c aa 43 00 e8 d7 d5 49 00 fb bb 54 02 00 00 <eb> 51 49 8d 9c 24 90 00 00 00 48 89 d8 48 c1 e8 03 80 3c 28 00 74
RSP: 0000:ffffc9000310fe80 EFLAGS: 00000282
RAX: 2f965cd293354300 RBX: 0000000000000254 RCX: 2f965cd293354300
RDX: dffffc0000000000 RSI: ffffffff8a2b1c00 RDI: ffffffff8a79ec00
RBP: dffffc0000000000 R08: ffffffff8d8967af R09: 1ffffffff1b12cf5
R10: dffffc0000000000 R11: fffffbfff1b12cf6 R12: ffffc9000310ff58
R13: ffff888025371500 R14: 0000000000000007 R15: 00007fc1aa186570
 handle_page_fault arch/x86/mm/fault.c:1445 [inline]
 exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1501
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0033:0x7fc1a9dd377c
Code: 23 83 c0 01 44 39 d0 75 dc 48 89 f0 25 ff 1f 00 00 49 89 34 c1 41 88 3c 00 31 c0 c3 66 90 41 38 3c 10 74 0b 41 88 3c 10 31 c0 <49> 89 34 d1 c3 b8 01 00 00 00 c3 66 0f 1f 84 00 00 00 00 00 48 83
RSP: 002b:00007ffd708cdbf8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffffff8198a0ae RCX: 0000000000000000
RDX: 00000000000000ae RSI: ffffffff8198a0ae RDI: 0000000000000000
RBP: 0000000000000000 R08: 00007fc1aa184000 R09: 00007fc1aa186000
R10: 000000008198a0b2 R11: 0000000000000000 R12: 00007fc1aa19a038
R13: 000000000000000c R14: ffffffff8198a48c R15: 00007fc1aacc9720
 </TASK>
----------------
Code disassembly (best guess):
   0:	5c                   	pop    %rsp
   1:	24 18                	and    $0x18,%al
   3:	48 8b 1b             	mov    (%rbx),%rbx
   6:	48 89 de             	mov    %rbx,%rsi
   9:	48 83 e6 03          	and    $0x3,%rsi
   d:	31 ff                	xor    %edi,%edi
   f:	e8 27 ae 43 00       	call   0x43ae3b
  14:	48 83 e3 03          	and    $0x3,%rbx
  18:	74 12                	je     0x2c
  1a:	e8 3c aa 43 00       	call   0x43aa5b
  1f:	e8 d7 d5 49 00       	call   0x49d5fb
  24:	fb                   	sti
  25:	bb 54 02 00 00       	mov    $0x254,%ebx
* 2a:	eb 51                	jmp    0x7d <-- trapping instruction
  2c:	49 8d 9c 24 90 00 00 	lea    0x90(%r12),%rbx
  33:	00
  34:	48 89 d8             	mov    %rbx,%rax
  37:	48 c1 e8 03          	shr    $0x3,%rax
  3b:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1)
  3f:	74                   	.byte 0x74