------------[ cut here ]------------
WARNING: CPU: 0 PID: 7794 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 7794 Comm: syz.3.672 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:ffffc90000007d30 EFLAGS: 00010006
RAX: ffffffff819ed760 RBX: 0000000000000000 RCX: ffff888025930000
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1004b26001
R10: ffffed1004b26001 R11: 1ffff11004b26000 R12: ffff888025931788
R13: 00007ffffffff000 R14: ffffc90000007da8 R15: 0000000000000000
FS:  00007fc1660926c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555d3bcba950 CR3: 00000000781f3000 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_f3c4d654356a1293+0x34/0x63c
 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:__might_fault+0x8b/0x110 mm/memory.c:5356
Code: f7 89 ee 31 d2 e8 05 2f a6 ff 48 81 c3 10 05 00 00 49 89 de 49 c1 ee 03 43 80 3c 26 00 74 08 48 89 df e8 88 5d 0f 00 48 8b 3b <48> 85 ff 74 57 48 81 c7 28 01 00 00 31 f6 31 d2 b9 01 00 00 00 41
RSP: 0018:ffffc90002fafa38 EFLAGS: 00000246
RAX: 57adac646dfb6300 RBX: ffff888025930510 RCX: 57adac646dfb6300
RDX: ffff888025930000 RSI: ffffffff8a0b2ac0 RDI: ffff88807dc65b00
RBP: 000000000000000e R08: dffffc0000000000 R09: ffffc90002fafb00
R10: fffff520005f5f67 R11: 1ffff920005f5f60 R12: dffffc0000000000
R13: dffffc0000000000 R14: 1ffff11004b260a2 R15: 0000000000000000
 _copy_from_user+0x29/0x170 lib/usercopy.c:14
 copy_from_user include/linux/uaccess.h:192 [inline]
 __copy_msghdr_from_user net/socket.c:2318 [inline]
 copy_msghdr_from_user net/socket.c:2369 [inline]
 recvmsg_copy_msghdr net/socket.c:2621 [inline]
 ___sys_recvmsg+0x129/0x4f0 net/socket.c:2693
 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: 0033:0x7fc167e4bec9
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:00007fc166092038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fc1680a3090 RCX: 00007fc167e4bec9
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000005
RBP: 00007fc167ecef91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc1680a3128 R14: 00007fc1680a3090 R15: 00007ffdecce07c8
 </TASK>
----------------
Code disassembly (best guess):
   0:	f7 89 ee 31 d2 e8 05 	testl  $0xffa62f05,-0x172dce12(%rcx)
   7:	2f a6 ff
   a:	48 81 c3 10 05 00 00 	add    $0x510,%rbx
  11:	49 89 de             	mov    %rbx,%r14
  14:	49 c1 ee 03          	shr    $0x3,%r14
  18:	43 80 3c 26 00       	cmpb   $0x0,(%r14,%r12,1)
  1d:	74 08                	je     0x27
  1f:	48 89 df             	mov    %rbx,%rdi
  22:	e8 88 5d 0f 00       	call   0xf5daf
  27:	48 8b 3b             	mov    (%rbx),%rdi
* 2a:	48 85 ff             	test   %rdi,%rdi <-- trapping instruction
  2d:	74 57                	je     0x86
  2f:	48 81 c7 28 01 00 00 	add    $0x128,%rdi
  36:	31 f6                	xor    %esi,%esi
  38:	31 d2                	xor    %edx,%edx
  3a:	b9 01 00 00 00       	mov    $0x1,%ecx
  3f:	41                   	rex.B