------------[ cut here ]------------
WARNING: CPU: 0 PID: 5638 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 5638 Comm: syz.5.248 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: 0000:ffffc90000007d40 EFLAGS: 00010006
RAX: ffffffff819ed980 RBX: 0000000000000000 RCX: ffff888029091dc0
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff5419
R10: fffffbfff1ff5419 R11: 1ffffffff1ff5418 R12: ffff888029093548
R13: dffffc0000000000 R14: ffffc90000007da8 R15: 0000000000000000
FS:  00007f68faf446c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f68fcc74830 CR3: 000000007cad9000 CR4: 00000000003506f0
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_user kernel/trace/bpf_trace.c:166 [inline]
 bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
 bpf_prog_1ac23171ae95db47+0x34/0x124
 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:check_kcov_mode kernel/kcov.c:172 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:227 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x13/0x80 kernel/kcov.c:279
Code: 10 4a 89 74 02 18 4a 89 44 02 20 48 ff c1 48 89 0a c3 0f 1f 44 00 00 48 8b 04 24 65 48 8b 0d 44 a1 8a 7e 65 8b 15 45 a1 8a 7e <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 5b 83 b9 34 16 00 00
RSP: 0000:ffffc90002dafad0 EFLAGS: 00000246
RAX: ffffffff819c8aa3 RBX: dffffc0000000000 RCX: ffff888029091dc0
RDX: 0000000080000001 RSI: 0000000000000022 RDI: 000000000000003f
RBP: 0000000000000022 R08: dffffc0000000000 R09: fffff94000397c01
R10: fffff94000397c01 R11: 1ffffd4000397c00 R12: 1ffff920005b5f81
R13: ffffc90002dafc08 R14: 0000000000000122 R15: 0000000000000131
 xas_next_entry+0x153/0x3d0 include/linux/xarray.h:1654
 next_map_page mm/filemap.c:3296 [inline]
 filemap_map_pages+0xeaa/0x1390 mm/filemap.c:3352
 do_fault_around mm/memory.c:4243 [inline]
 do_read_fault mm/memory.c:4258 [inline]
 do_fault mm/memory.c:4392 [inline]
 handle_pte_fault mm/memory.c:4650 [inline]
 __handle_mm_fault mm/memory.c:4785 [inline]
 handle_mm_fault+0x257d/0x43b0 mm/memory.c:4883
 do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1357
 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: 0033:0x7f68fcc74830
Code: Unable to access opcode bytes at RIP 0x7f68fcc74806.
RSP: 002b:00007f68faf44118 EFLAGS: 00010246
RAX: fffffffffffffeb8 RBX: 00007f68faf446c0 RCX: 00007f68fcd11e89
RDX: 00007f68faf44d78 RSI: 0000000000000058 RDI: 00007f68faf446c0
RBP: 0000000000000000 R08: 00007f68faf446c0 R09: 00007ffe24dc5087
R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffa8
R13: 000000000000000b R14: 00007ffe24dc4fa0 R15: 00007ffe24dc5088
 </TASK>
----------------
Code disassembly (best guess):
   0:	10 4a 89             	adc    %cl,-0x77(%rdx)
   3:	74 02                	je     0x7
   5:	18 4a 89             	sbb    %cl,-0x77(%rdx)
   8:	44 02 20             	add    (%rax),%r12b
   b:	48 ff c1             	inc    %rcx
   e:	48 89 0a             	mov    %rcx,(%rdx)
  11:	c3                   	ret
  12:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  17:	48 8b 04 24          	mov    (%rsp),%rax
  1b:	65 48 8b 0d 44 a1 8a 	mov    %gs:0x7e8aa144(%rip),%rcx        # 0x7e8aa167
  22:	7e
  23:	65 8b 15 45 a1 8a 7e 	mov    %gs:0x7e8aa145(%rip),%edx        # 0x7e8aa16f
* 2a:	81 e2 00 01 ff 00    	and    $0xff0100,%edx <-- trapping instruction
  30:	74 11                	je     0x43
  32:	81 fa 00 01 00 00    	cmp    $0x100,%edx
  38:	75 5b                	jne    0x95
  3a:	83                   	.byte 0x83
  3b:	b9 34 16 00 00       	mov    $0x1634,%ecx