[ 10.585659][ T248] ip (248) used greatest stack depth: 24224 bytes left [ 12.079548][ T285] veth0: entered allmulticast mode [ 12.080258][ T285] veth1: entered allmulticast mode [ 12.080615][ T285] veth2: entered allmulticast mode [ 12.080935][ T285] veth3: entered allmulticast mode [ 12.082592][ T285] veth4: entered allmulticast mode [ 12.082945][ T285] veth5: entered allmulticast mode [ 23.259604][ T371] GACT probability NOT on [ 23.561301][ T375] [ 23.561582][ T375] ============================= [ 23.561747][ T375] WARNING: suspicious RCU usage [ 23.561905][ T375] 6.14.0-rc6-virtme #1 Not tainted [ 23.562300][ T375] ----------------------------- [ 23.562471][ T375] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 23.562729][ T375] [ 23.562729][ T375] other info that might help us debug this: [ 23.562729][ T375] [ 23.563027][ T375] [ 23.563027][ T375] rcu_scheduler_active = 2, debug_locks = 1 [ 23.563262][ T375] 1 lock held by mausezahn/375: [ 23.563420][ T375] #0: ffffffff8555b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 23.563706][ T375] [ 23.563706][ T375] stack backtrace: [ 23.563900][ T375] CPU: 1 UID: 0 PID: 375 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 23.563905][ T375] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 23.563908][ T375] Call Trace: [ 23.563910][ T375] [ 23.563913][ T375] dump_stack_lvl+0xb0/0xd0 [ 23.563921][ T375] lockdep_rcu_suspicious+0x1ea/0x280 [ 23.563933][ T375] dev_hard_start_xmit+0x2fc/0x3f0 [ 23.563943][ T375] __dev_queue_xmit+0xfaf/0x18d0 [ 23.563957][ T375] ? __pfx___dev_queue_xmit+0x10/0x10 [ 23.563962][ T375] ? packet_parse_headers+0x231/0x9c0 [ 23.563971][ T375] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 23.563978][ T375] ? __pfx_packet_parse_headers+0x10/0x10 [ 23.563982][ T375] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 23.563988][ T375] ? dev_get_by_index+0xb2/0x190 [ 23.564000][ T375] packet_snd+0xd0c/0x19d0 [ 23.564012][ T375] ? __lock_release+0x103/0x460 [ 23.564016][ T375] ? __might_fault+0x11b/0x170 [ 23.564024][ T375] ? __pfx_packet_snd+0x10/0x10 [ 23.564026][ T375] ? trace_lock_acquire+0x14c/0x1f0 [ 23.564028][ T375] ? __might_fault+0x11b/0x170 [ 23.564035][ T375] ? lock_acquire+0x32/0xc0 [ 23.564041][ T375] ? __might_fault+0x11b/0x170 [ 23.564052][ T375] __sys_sendto+0x3c3/0x450 [ 23.564059][ T375] ? __pfx___sys_sendto+0x10/0x10 [ 23.564076][ T375] ? sock_ioctl+0x3b6/0x590 [ 23.564087][ T375] ? __pfx___up_read+0x10/0x10 [ 23.564097][ T375] ? do_user_addr_fault+0x374/0xe30 [ 23.564108][ T375] ? do_user_addr_fault+0x374/0xe30 [ 23.564115][ T375] __x64_sys_sendto+0xe0/0x1c0 [ 23.564119][ T375] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 23.564124][ T375] do_syscall_64+0xc1/0x1d0 [ 23.564133][ T375] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.564139][ T375] RIP: 0033:0x7fe83440ea4a [ 23.564144][ T375] 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 [ 23.564148][ T375] RSP: 002b:00007ffdc4152f28 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 23.564152][ T375] RAX: ffffffffffffffda RBX: 000000000c79c9d0 RCX: 00007fe83440ea4a [ 23.564154][ T375] RDX: 00000000000000aa RSI: 000000000c79cd02 RDI: 0000000000000005 [ 23.564156][ T375] RBP: 000000000c79cd02 R08: 00007ffdc4152f30 R09: 0000000000000014 [ 23.564157][ T375] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 23.564159][ T375] R13: 00000000000000aa R14: 00007ffdc4152f30 R15: 0000000000000000 [ 23.564175][ T375] [ 39.053227][ T285] veth0: left allmulticast mode [ 39.053555][ T285] veth1: left allmulticast mode [ 39.053791][ T285] veth2: left allmulticast mode [ 39.054026][ T285] veth3: left allmulticast mode [ 39.054875][ T285] veth4: left allmulticast mode [ 39.055217][ T285] veth5: left allmulticast mode