------------[ cut here ]------------
WARNING: CPU: 1 PID: 5461 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 5461 Comm: syz.3.296 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 3d f7 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 c0 f3 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: 0018:ffffc90000dd0998 EFLAGS: 00010246
RAX: ffffffff819ed760 RBX: 0000000000000008 RCX: ffff8880207c8000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed10040f9001
R10: ffffed10040f9001 R11: 1ffff110040f9000 R12: ffff8880207c9788
R13: 00007ffffffff000 R14: ffffc90000dd0a08 R15: 0000000000000004
FS:  00007fab83dde6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fab7b9fd000 CR3: 000000005527e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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_df4102469b4ba413+0x38/0x328
 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_run2+0x15b/0x2d0 kernel/trace/bpf_trace.c:1915
 __bpf_trace_kfree+0x6e/0x90 include/trace/events/kmem.h:118
 trace_kfree include/trace/events/kmem.h:118 [inline]
 kfree+0x25f/0x2a0 mm/slub.c:4554
 security_cred_free+0xbc/0xf0 security/security.c:1719
 put_cred_rcu+0xdd/0x3e0 kernel/cred.c:115
 rcu_do_batch kernel/rcu/tree.c:2523 [inline]
 rcu_core+0x962/0x15d0 kernel/rcu/tree.c:2763
 handle_softirqs+0x328/0x820 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x12f/0x220 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:preempt_count_add+0x0/0x190 kernel/sched/core.c:5499
Code: 24 80 e1 07 80 c1 03 38 c1 7c 97 48 8b 3c 24 e8 e6 c2 6a 00 eb 8c e9 f5 fe ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 <41> 57 41 56 53 49 bf 00 00 00 00 00 fc ff df 48 c7 c0 80 2f 0c 96
RSP: 0018:ffffc900039bf580 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffc900039bf6a8 RCX: 0000000080000001
RDX: ffffc900039bf738 RSI: dffffc0000000000 RDI: 0000000000000001
RBP: ffffc900039bf6f0 R08: dffffc0000000000 R09: ffffc900039bf6f8
R10: fffff52000737ee1 R11: 1ffff92000737edf R12: ffffffff812c519a
R13: ffffc900039bf6a8 R14: dffffc0000000000 R15: 1ffff92000737ed5
 unwind_next_frame+0xac/0x1d90 arch/x86/kernel/unwind_orc.c:433
 __unwind_start+0x5bb/0x740 arch/x86/kernel/unwind_orc.c:704
 unwind_start arch/x86/include/asm/unwind.h:60 [inline]
 arch_stack_walk+0xda/0x140 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
 save_stack+0xf3/0x1e0 mm/page_owner.c:119
 __reset_page_owner+0x51/0x180 mm/page_owner.c:140
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1340 [inline]
 free_pcp_prepare mm/page_alloc.c:1391 [inline]
 free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317
 free_unref_page_list+0x122/0x7e0 mm/page_alloc.c:3433
 release_pages+0x184b/0x1bb0 mm/swap.c:963
 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:240 [inline]
 tlb_flush_mmu mm/mmu_gather.c:247 [inline]
 tlb_finish_mmu+0x164/0x2e0 mm/mmu_gather.c:338
 unmap_region+0x315/0x360 mm/mmap.c:2669
 __do_munmap+0x9d3/0xdc0 mm/mmap.c:2899
 __vm_munmap+0x137/0x230 mm/mmap.c:2952
 __do_sys_munmap mm/mmap.c:2978 [inline]
 __se_sys_munmap mm/mmap.c:2974 [inline]
 __x64_sys_munmap+0x67/0x70 mm/mmap.c:2974
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fab85b76cb7
Code: 00 00 00 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fab83ddde18 EFLAGS: 00000246 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 0000000000040000 RCX: 00007fab85b76cb7
RDX: 0000000000000000 RSI: 0000000008400000 RDI: 00007fab7b9be000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000461
R10: 00000000000003ba R11: 0000000000000246 R12: 0000000000000009
R13: 00007fab83dddef0 R14: 00007fab83dddeb0 R15: 00007fab7b9be000
 </TASK>
----------------
Code disassembly (best guess):
   0:	24 80                	and    $0x80,%al
   2:	e1 07                	loope  0xb
   4:	80 c1 03             	add    $0x3,%cl
   7:	38 c1                	cmp    %al,%cl
   9:	7c 97                	jl     0xffffffa2
   b:	48 8b 3c 24          	mov    (%rsp),%rdi
   f:	e8 e6 c2 6a 00       	call   0x6ac2fa
  14:	eb 8c                	jmp    0xffffffa2
  16:	e9 f5 fe ff ff       	jmp    0xffffff10
  1b:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  22:	00 00 00
  25:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
* 2a:	41 57                	push   %r15 <-- trapping instruction
  2c:	41 56                	push   %r14
  2e:	53                   	push   %rbx
  2f:	49 bf 00 00 00 00 00 	movabs $0xdffffc0000000000,%r15
  36:	fc ff df
  39:	48 c7 c0 80 2f 0c 96 	mov    $0xffffffff960c2f80,%rax