------------[ cut here ]------------
WARNING: CPU: 1 PID: 5334 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 5334 Comm: syz.2.304 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:ffffc90000dd0d38 EFLAGS: 00010006
RAX: ffffffff819ed980 RBX: 0000000000000008 RCX: ffff88802119bb80
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1004233771
R10: ffffed1004233771 R11: 1ffff11004233770 R12: ffff88802119d308
R13: 00007ffffffff000 R14: ffffc90000dd0da8 R15: 0000000000000000
FS:  00007f8e094806c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 000000001fb36000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000200000000380 DR2: 0000200000000380
DR3: 0000200000000380 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_1ccb8ba97563bf77+0x59/0xb8c
 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:bytes_is_nonzero mm/kasan/generic.c:85 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x7b/0x290 mm/kasan/generic.c:189
Code: 5c 37 ff 48 c1 eb 03 4e 8d 14 3b 4d 89 d6 4d 29 ce 49 83 fe 10 7f 26 4d 85 f6 0f 84 39 01 00 00 48 f7 d3 4c 01 db 41 80 39 00 <0f> 85 c1 01 00 00 49 ff c1 48 ff c3 75 ee e9 1c 01 00 00 44 89 cb
RSP: 0018:ffffc9000350f648 EFLAGS: 00000246
RAX: ffff88802119bb01 RBX: fffffffffffffffd RCX: ffffffff81349782
RDX: 0000000000000001 RSI: 0000000000000060 RDI: ffffc9000350f6e8
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffff520006a1ee6
R10: fffff520006a1ee9 R11: 1ffff920006a1edd R12: 0000000000000000
R13: ffff88802119bb80 R14: 000000000000000c R15: dffffc0000000001
 memset+0x1e/0x40 mm/kasan/shadow.c:44
 __unwind_start+0x32/0x740 arch/x86/kernel/unwind_orc.c:632
 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
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1710 [inline]
 slab_free_freelist_hook+0xea/0x170 mm/slub.c:1736
 slab_free mm/slub.c:3504 [inline]
 kfree+0xef/0x2a0 mm/slub.c:4564
 tomoyo_realpath_from_path+0x5d8/0x610 security/tomoyo/realpath.c:291
 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: 0033:0x7f8e0b21934b
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:00007f8e09480050 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f8e0b470038 RCX: 00007f8e0b21934b
RDX: 0000000000000000 RSI: 0000000000006364 RDI: 00000000000000d8
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fffd3feed67
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f8e0b470038 R14: 00007fffd3feec80 R15: 00007fffd3feed68
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	ff 48 c1             	decl   -0x3f(%rax)
   3:	eb 03                	jmp    0x8
   5:	4e 8d 14 3b          	lea    (%rbx,%r15,1),%r10
   9:	4d 89 d6             	mov    %r10,%r14
   c:	4d 29 ce             	sub    %r9,%r14
   f:	49 83 fe 10          	cmp    $0x10,%r14
  13:	7f 26                	jg     0x3b
  15:	4d 85 f6             	test   %r14,%r14
  18:	0f 84 39 01 00 00    	je     0x157
  1e:	48 f7 d3             	not    %rbx
  21:	4c 01 db             	add    %r11,%rbx
  24:	41 80 39 00          	cmpb   $0x0,(%r9)
* 28:	0f 85 c1 01 00 00    	jne    0x1ef <-- trapping instruction
  2e:	49 ff c1             	inc    %r9
  31:	48 ff c3             	inc    %rbx
  34:	75 ee                	jne    0x24
  36:	e9 1c 01 00 00       	jmp    0x157
  3b:	44 89 cb             	mov    %r9d,%ebx