------------[ cut here ]------------
WARNING: CPU: 1 PID: 6796 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 6796 Comm: syz.4.645 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:ffffc90000dd0d40 EFLAGS: 00010006
RAX: ffffffff819ed760 RBX: 0000000000000008 RCX: ffff888020c09dc0
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff7819
R10: fffffbfff1ff7819 R11: 1ffffffff1ff7818 R12: ffff888020c0b548
R13: dffffc0000000000 R14: ffffc90000dd0da8 R15: 0000000000000000
FS:  00007f207b2de6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000006301a000 CR4: 00000000003506e0
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_user kernel/trace/bpf_trace.c:166 [inline]
 bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
 bpf_prog_3b53280d0bd88656+0x5b/0x3f4
 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
 trace_tlb_flush+0xe6/0x110 include/trace/events/tlb.h:38
 flush_tlb_func+0x43f/0x510 arch/x86/mm/tlb.c:855
 flush_smp_call_function_queue+0x2a9/0x760 kernel/smp.c:628
 __sysvec_call_function_single+0x98/0x240 arch/x86/kernel/smp.c:248
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:243 [inline]
 sysvec_call_function_single+0x98/0xc0 arch/x86/kernel/smp.c:243
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x16/0x20 arch/x86/include/asm/idtentry.h:684
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:50 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:178 [inline]
RIP: 0010:unwind_next_frame+0x102f/0x1d90 arch/x86/kernel/unwind_orc.c:448
Code: 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 ff e8 32 ab 87 00 4d 89 37 e9 3f 01 00 00 49 89 d7 49 89 d5 4c 89 e0 <4c> 29 e8 48 89 c1 48 c1 f9 02 48 c1 e8 3f 48 01 c8 48 83 e0 fe 4d
RSP: 0018:ffffc90002eff728 EFLAGS: 00000297
RAX: ffffffff8dd9e48c RBX: ffffc90002eff7e8 RCX: ffffffff960c2f00
RDX: ffffffff8dd9e464 RSI: ffffffff8e768bc6 RDI: ffffffff8134790c
RBP: ffffffff89a8b6eb R08: 000000000000000b R09: 0000000000000005
R10: fffff520005dff09 R11: 1ffff920005dff07 R12: ffffffff8dd9e48c
R13: ffffffff8dd9e464 R14: 000000000008a8b6 R15: ffffffff8dd9e464
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc mm/kasan/common.c:513 [inline]
 __kasan_kmalloc+0xb5/0xf0 mm/kasan/common.c:522
 kmalloc include/linux/slab.h:609 [inline]
 tomoyo_realpath_from_path+0x118/0x610 security/tomoyo/realpath.c:254
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_number_perm+0x1d5/0x5d0 security/tomoyo/file.c:723
 security_file_ioctl+0x6c/0xa0 security/security.c:1555
 __do_sys_ioctl fs/ioctl.c:868 [inline]
 __se_sys_ioctl+0x48/0x170 fs/ioctl.c:860
 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: 0033:0x7f207d0767ab
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007f207b2de050 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f207d2be038 RCX: 00007f207d0767ab
RDX: 0000000000000000 RSI: 0000000000006364 RDI: 00000000000000d8
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffceb931487
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f207d2be038 R14: 00007ffceb9313a0 R15: 00007ffceb931488
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
   7:	fc ff df
   a:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1)
   e:	74 08                	je     0x18
  10:	4c 89 ff             	mov    %r15,%rdi
  13:	e8 32 ab 87 00       	call   0x87ab4a
  18:	4d 89 37             	mov    %r14,(%r15)
  1b:	e9 3f 01 00 00       	jmp    0x15f
  20:	49 89 d7             	mov    %rdx,%r15
  23:	49 89 d5             	mov    %rdx,%r13
  26:	4c 89 e0             	mov    %r12,%rax
* 29:	4c 29 e8             	sub    %r13,%rax <-- trapping instruction
  2c:	48 89 c1             	mov    %rax,%rcx
  2f:	48 c1 f9 02          	sar    $0x2,%rcx
  33:	48 c1 e8 3f          	shr    $0x3f,%rax
  37:	48 01 c8             	add    %rcx,%rax
  3a:	48 83 e0 fe          	and    $0xfffffffffffffffe,%rax
  3e:	4d                   	rex.WRB