------------[ cut here ]------------
WARNING: CPU: 1 PID: 154 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 154 Comm: kworker/u4:2 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 6d 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 f0 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:ffffc90000dd0c10 EFLAGS: 00010006
RAX: ffffffff819ed660 RBX: 0000000000000008 RCX: ffff88801bb7d940
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed100376fb29
R10: ffffed100376fb29 R11: 1ffff1100376fb28 R12: ffff88801bb7f0c8
R13: 00007ffffffff000 R14: ffffc90000dd0c88 R15: 0000000020000000
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5ba3004358 CR3: 000000000be8e000 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_bcff4640d6a7c5a9+0x5e/0x92c
 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
 __traceiter_tlb_flush+0x69/0xb0 include/trace/events/tlb.h:38
 trace_tlb_flush+0xe6/0x110 include/trace/events/tlb.h:38
 switch_mm_irqs_off+0x6e3/0x9a0 arch/x86/mm/tlb.c:-1
 flush_tlb_func+0x1bc/0x510 arch/x86/mm/tlb.c:773
 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:84 [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+0x71/0x290 mm/kasan/generic.c:189
Code: 00 fc ff df 4f 8d 0c 03 48 8d 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
RSP: 0018:ffffc90001ff7c20 EFLAGS: 00000202
RAX: ffffffff814e4801 RBX: 1ffffffff1ad32b5 RCX: ffffffff814e48ee
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8d6995a8
RBP: ffffc90001ff7db8 R08: dffffc0000000000 R09: fffffbfff1ad32b5
R10: fffffbfff1ad32b6 R11: 1ffffffff1ad32b5 R12: dffffc0000000000
R13: ffff88801d009018 R14: 0000000000000001 R15: dffffc0000000001
 instrument_atomic_read include/linux/instrumented.h:71 [inline]
 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
 cpumask_test_cpu include/linux/cpumask.h:344 [inline]
 cpu_online include/linux/cpumask.h:895 [inline]
 trace_workqueue_execute_end include/trace/events/workqueue.h:108 [inline]
 process_one_work+0x8be/0x1000 kernel/workqueue.c:2315
 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	df 4f 8d             	fisttps -0x73(%rdi)
   3:	0c 03                	or     $0x3,%al
   5:	48 8d 5c 37 ff       	lea    -0x1(%rdi,%rsi,1),%rbx
   a:	48 c1 eb 03          	shr    $0x3,%rbx
   e:	4e 8d 14 3b          	lea    (%rbx,%r15,1),%r10
  12:	4d 89 d6             	mov    %r10,%r14
  15:	4d 29 ce             	sub    %r9,%r14
  18:	49 83 fe 10          	cmp    $0x10,%r14
  1c:	7f 26                	jg     0x44
  1e:	4d 85 f6             	test   %r14,%r14
  21:	0f 84 39 01 00 00    	je     0x160
* 27:	48 f7 d3             	not    %rbx <-- trapping instruction
  2a:	4c 01 db             	add    %r11,%rbx
  2d:	41 80 39 00          	cmpb   $0x0,(%r9)
  31:	0f 85 c1 01 00 00    	jne    0x1f8
  37:	49 ff c1             	inc    %r9
  3a:	48 ff c3             	inc    %rbx