[ 1889.196141][ T6295] 
[ 1889.196310][ T6295] =============================
[ 1889.197419][ T6295] WARNING: suspicious RCU usage
[ 1889.197827][ T6295] 6.12.0-rc6-virtme #1 Not tainted
[ 1889.197995][ T6295] -----------------------------
[ 1889.198158][ T6295] net/ipv6/ip6mr.c:132 RCU-list traversed in non-reader section!!
[ 1889.198691][ T6295] 
[ 1889.198691][ T6295] other info that might help us debug this:
[ 1889.198691][ T6295] 
[ 1889.199016][ T6295] 
[ 1889.199016][ T6295] rcu_scheduler_active = 2, debug_locks = 1
[ 1889.199258][ T6295] no locks held by smcrouted/6295.
[ 1889.199432][ T6295] 
[ 1889.199432][ T6295] stack backtrace:
[ 1889.199638][ T6295] CPU: 3 UID: 0 PID: 6295 Comm: smcrouted Not tainted 6.12.0-rc6-virtme #1
[ 1889.199926][ T6295] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1889.200295][ T6295] Call Trace:
[ 1889.200450][ T6295]  <TASK>
[ 1889.200545][ T6295]  dump_stack_lvl+0xb0/0xd0
[ 1889.200741][ T6295]  lockdep_rcu_suspicious+0x1ea/0x280
[ 1889.200973][ T6295]  ip6mr_get_table+0x142/0x190
[ 1889.201210][ T6295]  ip6_mroute_setsockopt+0x185/0x12d0
[ 1889.201446][ T6295]  ? __pfx_ip6_mroute_setsockopt+0x10/0x10
[ 1889.201750][ T6295]  ? __lock_release+0x103/0x460
[ 1889.201990][ T6295]  ? __might_fault+0x11b/0x170
[ 1889.202248][ T6295]  ? trace_lock_acquire+0x14d/0x1f0
[ 1889.202579][ T6295]  ? __might_fault+0xc3/0x170
[ 1889.202827][ T6295]  ? lock_acquire+0x32/0xc0
[ 1889.203082][ T6295]  ? __might_fault+0xc3/0x170
[ 1889.203329][ T6295]  ? __might_fault+0x11b/0x170
[ 1889.203582][ T6295]  do_ipv6_setsockopt+0x705/0x34e0
[ 1889.203833][ T6295]  ? __lock_release+0xe0/0x460
[ 1889.204085][ T6295]  ? __pfx_do_ipv6_setsockopt+0x10/0x10
[ 1889.204323][ T6295]  ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1889.204566][ T6295]  ? rcu_read_lock_any_held+0x43/0xb0
[ 1889.204805][ T6295]  ? validate_chain+0x1fe/0xae0
[ 1889.205050][ T6295]  ? is_bpf_text_address+0x67/0x120
[ 1889.205307][ T6295]  ? __pfx_validate_chain+0x10/0x10
[ 1889.205551][ T6295]  ? hlock_class+0x4e/0x130
[ 1889.205799][ T6295]  ? mark_lock+0x38/0x3e0
[ 1889.205960][ T6295]  ? __lock_acquire+0xb3f/0x1580
[ 1889.206229][ T6295]  ? find_held_lock+0x2c/0x110
[ 1889.206421][ T6295]  ? ipv6_setsockopt+0x7f/0xe0
[ 1889.206579][ T6295]  ipv6_setsockopt+0x7f/0xe0
[ 1889.206753][ T6295]  rawv6_setsockopt+0xb7/0x550
[ 1889.206918][ T6295]  ? __pfx_rawv6_setsockopt+0x10/0x10
[ 1889.207075][ T6295]  ? __lock_acquire+0xb3f/0x1580
[ 1889.207226][ T6295]  ? kfree+0x2d/0x340
[ 1889.207350][ T6295]  do_sock_setsockopt+0x149/0x3a0
[ 1889.207509][ T6295]  ? __pfx_do_sock_setsockopt+0x10/0x10
[ 1889.207672][ T6295]  ? __lock_release+0x103/0x460
[ 1889.207829][ T6295]  ? fd_install+0x1d1/0x5a0
[ 1889.207990][ T6295]  ? trace_lock_acquire+0x14d/0x1f0
[ 1889.208143][ T6295]  ? fdget+0x52/0x1e0
[ 1889.208263][ T6295]  __sys_setsockopt+0x104/0x1a0
[ 1889.208415][ T6295]  ? __pfx___sys_setsockopt+0x10/0x10
[ 1889.208565][ T6295]  ? __sys_socket+0x168/0x1e0
[ 1889.208724][ T6295]  ? __pfx___sys_socket+0x10/0x10
[ 1889.208889][ T6295]  __x64_sys_setsockopt+0xbd/0x160
[ 1889.209040][ T6295]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 1889.209225][ T6295]  do_syscall_64+0xc1/0x1d0
[ 1889.209380][ T6295]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 1889.209572][ T6295] RIP: 0033:0x7f1fc475791e
[ 1889.209745][ T6295] Code: 0f 1f 40 00 48 8b 15 e1 94 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b1 0f 1f 00 f3 0f 1e fa 49 89 ca b8 36 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 0a c3 66 0f 1f 84 00 00 00 00 00 48 8b 15 a9
[ 1889.210291][ T6295] RSP: 002b:00007ffd3cb68bc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[ 1889.210719][ T6295] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1fc475791e
[ 1889.210946][ T6295] RDX: 00000000000000c8 RSI: 0000000000000029 RDI: 0000000000000008
[ 1889.211170][ T6295] RBP: 0000000000000008 R08: 0000000000000004 R09: 0000000000000000
[ 1889.211403][ T6295] R10: 00007ffd3cb68bec R11: 0000000000000246 R12: 0000000000000000
[ 1889.211727][ T6295] R13: 0000000000402650 R14: 0000000000411dd8 R15: 00007f1fc485c000
[ 1889.211967][ T6295]  </TASK>
[ 1889.219710][ T6295] veth0: entered allmulticast mode
[ 1889.220215][ T6295] veth1: entered allmulticast mode
[ 1889.220556][ T6295] veth2: entered allmulticast mode
[ 1889.220879][ T6295] veth3: entered allmulticast mode
[ 1918.655149][ T6295] veth0: left allmulticast mode
[ 1918.655468][ T6295] veth1: left allmulticast mode
[ 1918.655698][ T6295] veth2: left allmulticast mode
[ 1918.655925][ T6295] veth3: left allmulticast mode