------------[ cut here ]------------
WARNING: CPU: 0 PID: 5710 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:

CPU: 0 PID: 5710 Comm: syz.0.377 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:ffffc900000079f8 EFLAGS: 00010246

RAX: ffffffff819ed760 RBX: 0000000000000000 RCX: ffff88801d6cbb80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1003ad9771
R10: ffffed1003ad9771 R11: 1ffff11003ad9770 R12: ffff88801d6cd308
R13: 00007ffffffff000 R14: ffffc90000007a68 R15: 0000000020000000
FS:  00007f78daf9c6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000005ffffe8 CR3: 000000007b30c000 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_compat kernel/trace/bpf_trace.c:281 [inline]
 bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
 bpf_prog_24fd3d61f59b453e+0x3a/0x528
 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_run3+0x17e/0x320 kernel/trace/bpf_trace.c:1916
 __bpf_trace_kmem_cache_free+0x99/0xc0 include/trace/events/kmem.h:138
 trace_kmem_cache_free include/trace/events/kmem.h:138 [inline]
 kmem_cache_free+0x1e7/0x210 mm/slub.c:3521
 rcu_do_batch kernel/rcu/tree.c:2523 [inline]
 rcu_core+0x962/0x15d0 kernel/rcu/tree.c:2763
 handle_softirqs+0x328/0x820 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
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:ffffc900041978c0 EFLAGS: 00000246

RAX: ffffffff87cd7801 RBX: fffffffffffffff4 RCX: ffffffff87cd787c
RDX: 0000000000000001 RSI: 0000000000000080 RDI: ffffc900041979a0
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffff52000832f38
R10: fffff52000832f44 R11: 1ffff92000832f34 R12: 00000000000029f5
R13: dffffc0000000000 R14: 0000000000000010 R15: dffffc0000000001
 memset+0x1e/0x40 mm/kasan/shadow.c:44
 ____sys_recvmsg+0xbc/0x580 net/socket.c:2637
 ___sys_recvmsg+0x1af/0x4f0 net/socket.c:2697
 do_recvmmsg+0x344/0x7a0 net/socket.c:2791
 __sys_recvmmsg net/socket.c:2870 [inline]
 __do_sys_recvmmsg net/socket.c:2893 [inline]
 __se_sys_recvmmsg net/socket.c:2886 [inline]
 __x64_sys_recvmmsg+0x18d/0x240 net/socket.c:2886
 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: 0033:0x7f78dcd55ec9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f78daf9c038 EFLAGS: 00000246
 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f78dcfad090 RCX: 00007f78dcd55ec9
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f78dcdd8f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f78dcfad128 R14: 00007f78dcfad090 R15: 00007ffd84d016c8
 </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