netdevice: dummy0: failed to sync uc/mc addresses
WARNING: net/core/dev_addr_lists.c:1278 at netif_rx_mode_run+0xd55/0x1290 net/core/dev_addr_lists.c:1278, CPU#0: syz.1.7420/3390
Modules linked in:
CPU: 0 UID: 0 PID: 3390 Comm: syz.1.7420 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:netif_rx_mode_run+0xe82/0x1290 net/core/dev_addr_lists.c:1278
Code: 3a 48 c7 c2 20 e0 dd 8c eb 1a e8 79 2b 44 f8 48 c7 c2 a0 de dd 8c eb 0c e8 6b 2b 44 f8 48 c7 c2 a0 df dd 8c 4c 89 f7 4c 89 fe <67> 48 0f b9 3a 48 8b 5c 24 38 48 8b 7c 24 48 e8 ea 5e 29 02 42 c7
RSP: 0018:ffffc9000347f820 EFLAGS: 00010293
RAX: ffffffff898190c7 RBX: 0000000000000001 RCX: ffff88805a378000
RDX: ffffffff8cdddea0 RSI: ffff88807d816120 RDI: ffffffff903f9790
RBP: ffffc9000347f9f8 R08: ffff88805a378000 R09: 0000000000000006
R10: 0000000000000005 R11: 0000000000000000 R12: ffff88807d816120
R13: dffffc0000000000 R14: ffffffff903f9790 R15: ffff88807d816120
FS:  0000000000000000(0000) GS:ffff888125290000(0063) knlGS:00000000f53bdb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f6ffc590 CR3: 000000008ab74000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000002
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 netif_rx_mode_sync+0x171/0x1e0 net/core/dev_addr_lists.c:1428
 dev_ifsioc+0xf51/0x1330 net/core/dev_ioctl.c:596
 dev_ioctl+0x7b4/0x1150 net/core/dev_ioctl.c:816
 sock_do_ioctl+0x23e/0x320 net/socket.c:1327
 compat_sock_ioctl_trans net/socket.c:3613 [inline]
 compat_sock_ioctl+0xba6/0xcb0 net/socket.c:3639
 __do_compat_sys_ioctl fs/ioctl.c:695 [inline]
 __se_compat_sys_ioctl fs/ioctl.c:638 [inline]
 __ia32_compat_sys_ioctl+0x5ea/0x950 fs/ioctl.c:638
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x229/0x6e0 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:332
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf6fcf01c
Code: 90 85 d2 74 0a 89 ce 81 e6 ff 0f 00 00 89 32 85 c0 74 05 c1 e9 0c 89 08 31 c0 5e 5d c3 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 58 b8
RSP: 002b:00000000f53bd50c EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000008931
RDX: 0000000080000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	3a 48 c7             	cmp    -0x39(%rax),%cl
   3:	c2 20 e0             	ret    $0xe020
   6:	dd 8c eb 1a e8 79 2b 	fisttpll 0x2b79e81a(%rbx,%rbp,8)
   d:	44 f8                	rex.R clc
   f:	48 c7 c2 a0 de dd 8c 	mov    $0xffffffff8cdddea0,%rdx
  16:	eb 0c                	jmp    0x24
  18:	e8 6b 2b 44 f8       	call   0xf8442b88
  1d:	48 c7 c2 a0 df dd 8c 	mov    $0xffffffff8cdddfa0,%rdx
  24:	4c 89 f7             	mov    %r14,%rdi
  27:	4c 89 fe             	mov    %r15,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	48 8b 5c 24 38       	mov    0x38(%rsp),%rbx
  34:	48 8b 7c 24 48       	mov    0x48(%rsp),%rdi
  39:	e8 ea 5e 29 02       	call   0x2295f28
  3e:	42                   	rex.X
  3f:	c7                   	.byte 0xc7