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RTNL: assertion failed at net/core/dev.c (9529)
WARNING: net/core/dev.c:9529 at __dev_set_promiscuity+0x52f/0x710 net/core/dev.c:9529, CPU#1: syz.7.4250/23122
Modules linked in:
CPU: 1 UID: 0 PID: 23122 Comm: syz.7.4250 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__dev_set_promiscuity+0x53b/0x710 net/core/dev.c:9529
Code: 41 ff d3 e9 07 fc ff ff e8 52 ef 87 f8 e9 fd fb ff ff e8 48 ef 87 f8 48 8d 3d 11 54 57 06 48 c7 c6 80 c7 6f 8c ba 39 25 00 00 <67> 48 0f b9 3a e9 23 fb ff ff e8 26 ef 87 f8 48 8b 7c 24 08 48 c7
RSP: 0018:ffffc90014fc7680 EFLAGS: 00010287
RAX: ffffffff89390878 RBX: ffff88807f312000 RCX: 0000000000080000
RDX: 0000000000002539 RSI: ffffffff8c6fc780 RDI: ffffffff8f905c90
RBP: 0000000000000000 R08: ffffffff8f311da7 R09: 1ffffffff1e623b4
R10: dffffc0000000000 R11: fffffbfff1e623b5 R12: 00000000ffffffff
R13: 0000000000000000 R14: ffff88807f3120b0 R15: 1ffff1100fe62416
FS:  00007f479d9546c0(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c271f69 CR3: 000000006a724000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000009951
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __dev_set_rx_mode+0x17c/0x260 net/core/dev.c:-1
 __dev_mc_add net/core/dev_addr_lists.c:872 [inline]
 dev_mc_add+0xc8/0x120 net/core/dev_addr_lists.c:886
 igmp6_group_added+0x225/0x800 net/ipv6/mcast.c:681
 __ipv6_dev_mc_inc+0x897/0xa50 net/ipv6/mcast.c:972
 addrconf_join_solict+0xf8/0x170 net/ipv6/addrconf.c:2246
 __ipv6_dev_ac_inc+0x87b/0xaf0 net/ipv6/anycast.c:380
 ipv6_sock_ac_join+0x6bf/0x890 net/ipv6/anycast.c:153
 do_ipv6_setsockopt+0x1e90/0x2eb0 net/ipv6/ipv6_sockglue.c:901
 ipv6_setsockopt+0x59/0x170 net/ipv6/ipv6_sockglue.c:973
 do_sock_setsockopt+0x17c/0x1b0 net/socket.c:2322
 __sys_setsockopt net/socket.c:2347 [inline]
 __do_sys_setsockopt net/socket.c:2353 [inline]
 __se_sys_setsockopt net/socket.c:2350 [inline]
 __x64_sys_setsockopt+0x13f/0x1b0 net/socket.c:2350
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f479cb8f749
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:00007f479d954038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f479cde6270 RCX: 00007f479cb8f749
RDX: 000000000000001b RSI: 0000000000000029 RDI: 000000000000000a
RBP: 00007f479cc13f91 R08: 0000000000000014 R09: 0000000000000000
R10: 0000200000000180 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f479cde6308 R14: 00007f479cde6270 R15: 00007f479cf0fa28
 </TASK>
----------------
Code disassembly (best guess):
   0:	41 ff d3             	call   *%r11
   3:	e9 07 fc ff ff       	jmp    0xfffffc0f
   8:	e8 52 ef 87 f8       	call   0xf887ef5f
   d:	e9 fd fb ff ff       	jmp    0xfffffc0f
  12:	e8 48 ef 87 f8       	call   0xf887ef5f
  17:	48 8d 3d 11 54 57 06 	lea    0x6575411(%rip),%rdi        # 0x657542f
  1e:	48 c7 c6 80 c7 6f 8c 	mov    $0xffffffff8c6fc780,%rsi
  25:	ba 39 25 00 00       	mov    $0x2539,%edx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 23 fb ff ff       	jmp    0xfffffb57
  34:	e8 26 ef 87 f8       	call   0xf887ef5f
  39:	48 8b 7c 24 08       	mov    0x8(%rsp),%rdi
  3e:	48                   	rex.W
  3f:	c7                   	.byte 0xc7