------------[ cut here ]------------
WARNING: CPU: 0 PID: 6331 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 6331 Comm: syz.4.556 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 0d f6 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 90 f2 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:ffffc90000007d30 EFLAGS: 00010006
RAX: ffffffff819ed980 RBX: 0000000000000000 RCX: ffff88807d3c5940
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed100fa78b29
R10: ffffed100fa78b29 R11: 1ffff1100fa78b28 R12: ffff88807d3c70c8
R13: 00007ffffffff000 R14: ffffc90000007da8 R15: 0000000000000000
FS:  00007f1c083116c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f87b788bf98 CR3: 00000000552f7000 CR4: 00000000003506f0
DR0: 0000000000000003 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_f3c4d654356a1293+0x34/0x508
 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:strlen+0x3b/0x60 lib/string.c:581
Code: 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 <75> de eb 19 89 d9 80 e1 07 38 c1 7c e6 49 89 fc 48 89 df e8 fd af
RSP: 0018:ffffc90003a1f9f8 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffffff8a4738c1 RCX: ffff88807d3c5940
RDX: 0000000000000000 RSI: 0000000000000007 RDI: ffffffff8a4738c0
RBP: ffffc90003a1fb40 R08: dffffc0000000000 R09: fffffbfff1ad26b6
R10: fffffbfff1ad26b6 R11: 1ffffffff1ad26b5 R12: ffff88801b3ba028
R13: 1ffff92000743f48 R14: dffffc0000000000 R15: ffffffffffffffff
 tomoyo_get_local_path+0x564/0x740 security/tomoyo/realpath.c:209
 tomoyo_realpath_from_path+0x2dc/0x610 security/tomoyo/realpath.c:-1
 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: 0033:0x7f1c0a0aa34b
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:00007f1c08311050 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1c0a301038 RCX: 00007f1c0a0aa34b
RDX: 0000000000000000 RSI: 0000000000006364 RDI: 00000000000000d8
RBP: 0000000000000000 R08: 00007ffe60e8bbe7 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f1c0a301038 R14: 00007ffe60e8bb00 R15: 00007ffe60e8bbe8
 </TASK>
----------------
Code disassembly (best guess), 6 bytes skipped:
   0:	df 48 89             	fisttps -0x77(%rax)
   3:	fb                   	sti
   4:	49 89 c7             	mov    %rax,%r15
   7:	48 89 d8             	mov    %rbx,%rax
   a:	48 c1 e8 03          	shr    $0x3,%rax
   e:	42 0f b6 04 30       	movzbl (%rax,%r14,1),%eax
  13:	84 c0                	test   %al,%al
  15:	75 11                	jne    0x28
  17:	48 ff c3             	inc    %rbx
  1a:	49 8d 47 01          	lea    0x1(%r15),%rax
  1e:	42 80 7c 3f 01 00    	cmpb   $0x0,0x1(%rdi,%r15,1)
* 24:	75 de                	jne    0x4 <-- trapping instruction
  26:	eb 19                	jmp    0x41
  28:	89 d9                	mov    %ebx,%ecx
  2a:	80 e1 07             	and    $0x7,%cl
  2d:	38 c1                	cmp    %al,%cl
  2f:	7c e6                	jl     0x17
  31:	49 89 fc             	mov    %rdi,%r12
  34:	48 89 df             	mov    %rbx,%rdi
  37:	e8                   	.byte 0xe8
  38:	fd                   	std
  39:	af                   	scas   %es:(%rdi),%eax