[ 11.047682][ T249] ip (249) used greatest stack depth: 23632 bytes left [ 12.541921][ T286] veth0: entered allmulticast mode [ 12.542622][ T286] veth1: entered allmulticast mode [ 12.542974][ T286] veth2: entered allmulticast mode [ 12.544337][ T286] veth3: entered allmulticast mode [ 12.544685][ T286] veth4: entered allmulticast mode [ 12.545025][ T286] veth5: entered allmulticast mode [ 23.764338][ T373] GACT probability NOT on [ 24.074301][ T377] [ 24.074694][ T377] ============================= [ 24.074872][ T377] WARNING: suspicious RCU usage [ 24.075038][ T377] 6.14.0-rc6-virtme #1 Not tainted [ 24.075444][ T377] ----------------------------- [ 24.075616][ T377] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 24.075911][ T377] [ 24.075911][ T377] other info that might help us debug this: [ 24.075911][ T377] [ 24.076238][ T377] [ 24.076238][ T377] rcu_scheduler_active = 2, debug_locks = 1 [ 24.076491][ T377] 1 lock held by mausezahn/377: [ 24.076669][ T377] #0: ffffffff9f95b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 24.076965][ T377] [ 24.076965][ T377] stack backtrace: [ 24.077182][ T377] CPU: 2 UID: 0 PID: 377 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 24.077187][ T377] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 24.077189][ T377] Call Trace: [ 24.077191][ T377] [ 24.077194][ T377] dump_stack_lvl+0xb0/0xd0 [ 24.077202][ T377] lockdep_rcu_suspicious+0x1ea/0x280 [ 24.077215][ T377] dev_hard_start_xmit+0x2fc/0x3f0 [ 24.077225][ T377] __dev_queue_xmit+0xfaf/0x18d0 [ 24.077239][ T377] ? __pfx___dev_queue_xmit+0x10/0x10 [ 24.077244][ T377] ? packet_parse_headers+0x231/0x9c0 [ 24.077253][ T377] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 24.077260][ T377] ? __pfx_packet_parse_headers+0x10/0x10 [ 24.077264][ T377] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 24.077270][ T377] ? dev_get_by_index+0xb2/0x190 [ 24.077282][ T377] packet_snd+0xd0c/0x19d0 [ 24.077294][ T377] ? __lock_release+0x103/0x460 [ 24.077298][ T377] ? __might_fault+0x11b/0x170 [ 24.077306][ T377] ? __pfx_packet_snd+0x10/0x10 [ 24.077308][ T377] ? trace_lock_acquire+0x14c/0x1f0 [ 24.077311][ T377] ? __might_fault+0x11b/0x170 [ 24.077318][ T377] ? lock_acquire+0x32/0xc0 [ 24.077324][ T377] ? __might_fault+0x11b/0x170 [ 24.077335][ T377] __sys_sendto+0x3c3/0x450 [ 24.077342][ T377] ? __pfx___sys_sendto+0x10/0x10 [ 24.077356][ T377] ? sock_ioctl+0x3b6/0x590 [ 24.077367][ T377] ? __pfx___up_read+0x10/0x10 [ 24.077376][ T377] ? do_user_addr_fault+0x374/0xe30 [ 24.077387][ T377] ? do_user_addr_fault+0x374/0xe30 [ 24.077394][ T377] __x64_sys_sendto+0xe0/0x1c0 [ 24.077398][ T377] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 24.077403][ T377] do_syscall_64+0xc1/0x1d0 [ 24.077412][ T377] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 24.077417][ T377] RIP: 0033:0x7f1afbefba4a [ 24.077422][ T377] 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 [ 24.077426][ T377] RSP: 002b:00007ffe57e0a4d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 24.077430][ T377] RAX: ffffffffffffffda RBX: 000000003755a9d0 RCX: 00007f1afbefba4a [ 24.077432][ T377] RDX: 00000000000000aa RSI: 000000003755ad02 RDI: 0000000000000005 [ 24.077434][ T377] RBP: 000000003755ad02 R08: 00007ffe57e0a4e0 R09: 0000000000000014 [ 24.077436][ T377] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 24.077438][ T377] R13: 00000000000000aa R14: 00007ffe57e0a4e0 R15: 0000000000000000 [ 24.077454][ T377] [ 40.030362][ T286] veth0: left allmulticast mode [ 40.030991][ T286] veth1: left allmulticast mode [ 40.031546][ T286] veth2: left allmulticast mode [ 40.032029][ T286] veth3: left allmulticast mode [ 40.032515][ T286] veth4: left allmulticast mode [ 40.032992][ T286] veth5: left allmulticast mode