=============================
WARNING: suspicious RCU usage
5.19.0-rc3-syzkaller-00169-gfa152f626b24 #0 Not tainted
-----------------------------
net/ipv6/addrconf.c:5171 suspicious rcu_dereference_check() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
1 lock held by syz-executor.1/3679:
 #0: ffffffff8d58c228 (rtnl_mutex){+.+.}-{3:3}, at: netlink_dump+0xb1/0xc60

stack backtrace:
CPU: 0 PID: 3679 Comm: syz-executor.1 Not tainted 5.19.0-rc3-syzkaller-00169-gfa152f626b24 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 dump_stack_lvl+0xfc/0x174
 in6_dump_addrs+0x12ac/0x1780
 inet6_dump_addr+0x9c3/0xb70
 netlink_dump+0x555/0xc60
 __netlink_dump_start+0x653/0x910
 rtnetlink_rcv_msg+0x731/0xc70
 netlink_rcv_skb+0x154/0x420
 netlink_unicast+0x52c/0x7f0
 netlink_sendmsg+0x8f4/0xde0
 sock_sendmsg+0xc9/0x120
 ____sys_sendmsg+0x631/0x810
 ___sys_sendmsg+0x100/0x170
 __x64_sys_sendmsg+0x135/0x210
 do_syscall_64+0x34/0xb0
 entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f4822479969
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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f48235180c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f482258bf60 RCX: 00007f4822479969
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007f48224d5094 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f482258bf60 R15: 00007ffc0ac49358
 </TASK>

=============================
WARNING: suspicious RCU usage
5.19.0-rc3-syzkaller-00169-gfa152f626b24 #0 Not tainted
-----------------------------
net/ipv6/addrconf.c:5173 suspicious rcu_dereference_check() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
1 lock held by syz-executor.1/3679:
 #0: ffffffff8d58c228 (rtnl_mutex){+.+.}-{3:3}, at: netlink_dump+0xb1/0xc60

stack backtrace:
CPU: 0 PID: 3679 Comm: syz-executor.1 Not tainted 5.19.0-rc3-syzkaller-00169-gfa152f626b24 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 dump_stack_lvl+0xfc/0x174
 in6_dump_addrs+0x1181/0x1780
 inet6_dump_addr+0x9c3/0xb70
 netlink_dump+0x555/0xc60
 __netlink_dump_start+0x653/0x910
 rtnetlink_rcv_msg+0x731/0xc70
 netlink_rcv_skb+0x154/0x420
 netlink_unicast+0x52c/0x7f0
 netlink_sendmsg+0x8f4/0xde0
 sock_sendmsg+0xc9/0x120
 ____sys_sendmsg+0x631/0x810
 ___sys_sendmsg+0x100/0x170
 __x64_sys_sendmsg+0x135/0x210
 do_syscall_64+0x34/0xb0
 entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f4822479969
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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f48235180c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f482258bf60 RCX: 00007f4822479969
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007f48224d5094 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f482258bf60 R15: 00007ffc0ac49358
 </TASK>
