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RTNL: assertion failed at net/core/dev.c (9542)
WARNING: net/core/dev.c:9542 at __dev_set_promiscuity+0x52f/0x710 net/core/dev.c:9542, CPU#1: syz.4.5824/20421
Modules linked in:
CPU: 1 UID: 0 PID: 20421 Comm: syz.4.5824 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:9542
Code: 94 23 02 e9 07 fc ff ff e8 f2 a7 87 f8 e9 fd fb ff ff e8 e8 a7 87 f8 48 8d 3d f1 1a 57 06 48 c7 c6 00 cd 6f 8c ba 46 25 00 00 <67> 48 0f b9 3a e9 23 fb ff ff e8 c6 a7 87 f8 48 8b 7c 24 08 48 c7
RSP: 0018:ffffc9000dd27820 EFLAGS: 00010287
RAX: ffffffff893950c8 RBX: ffff88805478a000 RCX: 0000000000080000
RDX: 0000000000002546 RSI: ffffffff8c6fcd00 RDI: ffffffff8f906bc0
RBP: 0000000000000000 R08: ffffffff8f3122e7 R09: 1ffffffff1e6245c
R10: dffffc0000000000 R11: fffffbfff1e6245d R12: 00000000ffffffff
R13: 0000000000000000 R14: ffff88805478a0b0 R15: 1ffff1100a8f1416
FS:  00007f60519ee6c0(0000) GS:ffff888125f1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2e6101 CR3: 0000000048395000 CR4: 0000000000350ef0
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
 __ipv6_sock_mc_join+0x503/0x750 net/ipv6/mcast.c:234
 do_ipv6_setsockopt+0x20f2/0x2eb0 net/ipv6/ipv6_sockglue.c:883
 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: 0033:0x7f605378f749
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:00007f60519ee038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f60539e5fa0 RCX: 00007f605378f749
RDX: 0000000000000014 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 00007f6053813f91 R08: 000000000000003d R09: 0000000000000000
R10: 0000200000000440 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f60539e6038 R14: 00007f60539e5fa0 R15: 00007fff0fbf2598
 </TASK>
----------------
Code disassembly (best guess):
   0:	94                   	xchg   %eax,%esp
   1:	23 02                	and    (%rdx),%eax
   3:	e9 07 fc ff ff       	jmp    0xfffffc0f
   8:	e8 f2 a7 87 f8       	call   0xf887a7ff
   d:	e9 fd fb ff ff       	jmp    0xfffffc0f
  12:	e8 e8 a7 87 f8       	call   0xf887a7ff
  17:	48 8d 3d f1 1a 57 06 	lea    0x6571af1(%rip),%rdi        # 0x6571b0f
  1e:	48 c7 c6 00 cd 6f 8c 	mov    $0xffffffff8c6fcd00,%rsi
  25:	ba 46 25 00 00       	mov    $0x2546,%edx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 23 fb ff ff       	jmp    0xfffffb57
  34:	e8 c6 a7 87 f8       	call   0xf887a7ff
  39:	48 8b 7c 24 08       	mov    0x8(%rsp),%rdi
  3e:	48                   	rex.W
  3f:	c7                   	.byte 0xc7