[ 16.294465][ T339] 8021q: 802.1Q VLAN Support v1.8 [ 16.647449][ T344] gre: GRE over IPv4 demultiplexor driver [ 16.707088][ T344] ip6_gre: GRE over IPv6 tunneling driver [ 18.770721][ T373] ip (373) used greatest stack depth: 22984 bytes left [ 26.070851][ T419] GACT probability NOT on [ 26.449821][ T422] [ 26.450265][ T422] ============================= [ 26.450592][ T422] WARNING: suspicious RCU usage [ 26.451187][ T422] 6.14.0-rc6-virtme #1 Not tainted [ 26.451455][ T422] ----------------------------- [ 26.451715][ T422] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 26.452218][ T422] [ 26.452218][ T422] other info that might help us debug this: [ 26.452218][ T422] [ 26.452699][ T422] [ 26.452699][ T422] rcu_scheduler_active = 2, debug_locks = 1 [ 26.453080][ T422] 1 lock held by mausezahn/422: [ 26.453367][ T422] #0: ffffffffb455b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 26.453834][ T422] [ 26.453834][ T422] stack backtrace: [ 26.454172][ T422] CPU: 2 UID: 0 PID: 422 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 26.454179][ T422] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 26.454182][ T422] Call Trace: [ 26.454185][ T422] [ 26.454189][ T422] dump_stack_lvl+0xb0/0xd0 [ 26.454202][ T422] lockdep_rcu_suspicious+0x1ea/0x280 [ 26.454221][ T422] dev_hard_start_xmit+0x2fc/0x3f0 [ 26.454243][ T422] __dev_queue_xmit+0xfaf/0x18d0 [ 26.454269][ T422] ? __pfx___dev_queue_xmit+0x10/0x10 [ 26.454276][ T422] ? packet_parse_headers+0x231/0x9c0 [ 26.454291][ T422] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 26.454302][ T422] ? __pfx_packet_parse_headers+0x10/0x10 [ 26.454310][ T422] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 26.454321][ T422] ? dev_get_by_index+0xb2/0x190 [ 26.454343][ T422] packet_snd+0xd0c/0x19d0 [ 26.454361][ T422] ? __lock_release+0x103/0x460 [ 26.454367][ T422] ? __might_fault+0x11b/0x170 [ 26.454377][ T422] ? __pfx_packet_snd+0x10/0x10 [ 26.454381][ T422] ? trace_lock_acquire+0x14c/0x1f0 [ 26.454384][ T422] ? __might_fault+0x11b/0x170 [ 26.454396][ T422] ? lock_acquire+0x32/0xc0 [ 26.454407][ T422] ? __might_fault+0x11b/0x170 [ 26.454427][ T422] __sys_sendto+0x3c3/0x450 [ 26.454437][ T422] ? __pfx___sys_sendto+0x10/0x10 [ 26.454465][ T422] ? sock_ioctl+0x3b6/0x590 [ 26.454483][ T422] ? __pfx___up_read+0x10/0x10 [ 26.454499][ T422] ? do_user_addr_fault+0x374/0xe30 [ 26.454517][ T422] ? do_user_addr_fault+0x374/0xe30 [ 26.454530][ T422] __x64_sys_sendto+0xe0/0x1c0 [ 26.454536][ T422] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 26.454546][ T422] do_syscall_64+0xc1/0x1d0 [ 26.454558][ T422] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.454565][ T422] RIP: 0033:0x7f7ba7020a4a [ 26.454573][ T422] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89 [ 26.454578][ T422] RSP: 002b:00007ffece1222b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 26.454584][ T422] RAX: ffffffffffffffda RBX: 0000000024a459d0 RCX: 00007f7ba7020a4a [ 26.454588][ T422] RDX: 0000000000000062 RSI: 0000000024a455c2 RDI: 0000000000000005 [ 26.454591][ T422] RBP: 0000000024a455c2 R08: 00007ffece1222c0 R09: 0000000000000014 [ 26.454595][ T422] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 26.454598][ T422] R13: 0000000000000062 R14: 00007ffece1222c0 R15: 0000000000000000 [ 26.454624][ T422]