[ 10.529789][ T249] ip (249) used greatest stack depth: 23504 bytes left [ 12.032478][ T287] veth0: entered allmulticast mode [ 12.033205][ T287] veth1: entered allmulticast mode [ 12.033799][ T287] veth2: entered allmulticast mode [ 12.034186][ T287] veth3: entered allmulticast mode [ 12.034559][ T287] veth4: entered allmulticast mode [ 12.034921][ T287] veth5: entered allmulticast mode [ 23.271389][ T374] GACT probability NOT on [ 23.602090][ T378] [ 23.602473][ T378] ============================= [ 23.602708][ T378] WARNING: suspicious RCU usage [ 23.602886][ T378] 6.14.0-rc6-virtme #1 Not tainted [ 23.603335][ T378] ----------------------------- [ 23.603515][ T378] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 23.603805][ T378] [ 23.603805][ T378] other info that might help us debug this: [ 23.603805][ T378] [ 23.604143][ T378] [ 23.604143][ T378] rcu_scheduler_active = 2, debug_locks = 1 [ 23.604391][ T378] 1 lock held by mausezahn/378: [ 23.604563][ T378] #0: ffffffffb455b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 23.604886][ T378] [ 23.604886][ T378] stack backtrace: [ 23.605112][ T378] CPU: 2 UID: 0 PID: 378 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 23.605116][ T378] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 23.605118][ T378] Call Trace: [ 23.605121][ T378] [ 23.605124][ T378] dump_stack_lvl+0xb0/0xd0 [ 23.605133][ T378] lockdep_rcu_suspicious+0x1ea/0x280 [ 23.605145][ T378] dev_hard_start_xmit+0x2fc/0x3f0 [ 23.605155][ T378] __dev_queue_xmit+0xfaf/0x18d0 [ 23.605170][ T378] ? __pfx___dev_queue_xmit+0x10/0x10 [ 23.605174][ T378] ? packet_parse_headers+0x231/0x9c0 [ 23.605183][ T378] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 23.605190][ T378] ? __pfx_packet_parse_headers+0x10/0x10 [ 23.605195][ T378] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 23.605201][ T378] ? dev_get_by_index+0xb2/0x190 [ 23.605212][ T378] packet_snd+0xd0c/0x19d0 [ 23.605224][ T378] ? __lock_release+0x103/0x460 [ 23.605228][ T378] ? __might_fault+0x11b/0x170 [ 23.605236][ T378] ? __pfx_packet_snd+0x10/0x10 [ 23.605238][ T378] ? trace_lock_acquire+0x14c/0x1f0 [ 23.605241][ T378] ? __might_fault+0x11b/0x170 [ 23.605248][ T378] ? lock_acquire+0x32/0xc0 [ 23.605254][ T378] ? __might_fault+0x11b/0x170 [ 23.605265][ T378] __sys_sendto+0x3c3/0x450 [ 23.605271][ T378] ? __pfx___sys_sendto+0x10/0x10 [ 23.605286][ T378] ? sock_ioctl+0x3b6/0x590 [ 23.605297][ T378] ? __pfx___up_read+0x10/0x10 [ 23.605306][ T378] ? do_user_addr_fault+0x374/0xe30 [ 23.605317][ T378] ? do_user_addr_fault+0x374/0xe30 [ 23.605324][ T378] __x64_sys_sendto+0xe0/0x1c0 [ 23.605328][ T378] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 23.605333][ T378] do_syscall_64+0xc1/0x1d0 [ 23.605343][ T378] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.605349][ T378] RIP: 0033:0x7fdf706a9a4a [ 23.605354][ T378] 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 [ 23.605357][ T378] RSP: 002b:00007fff75d0fef8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 23.605361][ T378] RAX: ffffffffffffffda RBX: 0000000037fdb9d0 RCX: 00007fdf706a9a4a [ 23.605363][ T378] RDX: 00000000000000aa RSI: 0000000037fdbd02 RDI: 0000000000000005 [ 23.605365][ T378] RBP: 0000000037fdbd02 R08: 00007fff75d0ff00 R09: 0000000000000014 [ 23.605367][ T378] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 23.605369][ T378] R13: 00000000000000aa R14: 00007fff75d0ff00 R15: 0000000000000000 [ 23.605385][ T378] [ 39.380964][ T287] veth0: left allmulticast mode [ 39.381349][ T287] veth1: left allmulticast mode [ 39.381703][ T287] veth2: left allmulticast mode [ 39.381956][ T287] veth3: left allmulticast mode [ 39.382211][ T287] veth4: left allmulticast mode [ 39.382447][ T287] veth5: left allmulticast mode