[ 100.156817][ T1169] veth2: entered promiscuous mode [ 101.212635][ T1172] [ 101.213033][ T1172] ============================= [ 101.213201][ T1172] WARNING: suspicious RCU usage [ 101.213365][ T1172] 6.14.0-rc6-virtme #1 Not tainted [ 101.213535][ T1172] ----------------------------- [ 101.213703][ T1172] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 101.214013][ T1172] [ 101.214013][ T1172] other info that might help us debug this: [ 101.214013][ T1172] [ 101.214304][ T1172] [ 101.214304][ T1172] rcu_scheduler_active = 2, debug_locks = 1 [ 101.214548][ T1172] 1 lock held by mausezahn/1172: [ 101.214712][ T1172] #0: ffffffff93b5b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 101.215029][ T1172] [ 101.215029][ T1172] stack backtrace: [ 101.215225][ T1172] CPU: 1 UID: 0 PID: 1172 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 101.215231][ T1172] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 101.215233][ T1172] Call Trace: [ 101.215235][ T1172] [ 101.215238][ T1172] dump_stack_lvl+0xb0/0xd0 [ 101.215247][ T1172] lockdep_rcu_suspicious+0x1ea/0x280 [ 101.215259][ T1172] dev_hard_start_xmit+0x2fc/0x3f0 [ 101.215270][ T1172] __dev_queue_xmit+0xfaf/0x18d0 [ 101.215284][ T1172] ? __pfx___dev_queue_xmit+0x10/0x10 [ 101.215289][ T1172] ? packet_parse_headers+0x231/0x9c0 [ 101.215298][ T1172] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 101.215305][ T1172] ? __pfx_packet_parse_headers+0x10/0x10 [ 101.215309][ T1172] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 101.215316][ T1172] ? dev_get_by_index+0xb2/0x190 [ 101.215328][ T1172] packet_snd+0xd0c/0x19d0 [ 101.215339][ T1172] ? __lock_release+0x103/0x460 [ 101.215343][ T1172] ? __might_fault+0x11b/0x170 [ 101.215352][ T1172] ? __pfx_packet_snd+0x10/0x10 [ 101.215354][ T1172] ? trace_lock_acquire+0x14c/0x1f0 [ 101.215357][ T1172] ? __might_fault+0x11b/0x170 [ 101.215364][ T1172] ? lock_acquire+0x32/0xc0 [ 101.215371][ T1172] ? __might_fault+0x11b/0x170 [ 101.215382][ T1172] __sys_sendto+0x3c3/0x450 [ 101.215388][ T1172] ? __pfx___sys_sendto+0x10/0x10 [ 101.215403][ T1172] ? sock_ioctl+0x3b6/0x590 [ 101.215409][ T1172] ? _copy_to_user+0x5c/0x80 [ 101.215421][ T1172] ? __pfx_put_timespec64+0x10/0x10 [ 101.215431][ T1172] ? posix_cpu_clock_get+0xe1/0x240 [ 101.215440][ T1172] ? __x64_sys_clock_gettime+0x17a/0x200 [ 101.215445][ T1172] ? __pfx___x64_sys_clock_gettime+0x10/0x10 [ 101.215452][ T1172] __x64_sys_sendto+0xe0/0x1c0 [ 101.215456][ T1172] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 101.215461][ T1172] do_syscall_64+0xc1/0x1d0 [ 101.215471][ T1172] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 101.215477][ T1172] RIP: 0033:0x7fdb9f2cda4a [ 101.215483][ T1172] 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 [ 101.215486][ T1172] RSP: 002b:00007fff03190058 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 101.215490][ T1172] RAX: ffffffffffffffda RBX: 000000000d7eb9d0 RCX: 00007fdb9f2cda4a [ 101.215493][ T1172] RDX: 0000000000000012 RSI: 000000000d7ebbd2 RDI: 0000000000000005 [ 101.215495][ T1172] RBP: 000000000d7ebbd2 R08: 00007fff03190060 R09: 0000000000000014 [ 101.215497][ T1172] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 101.215499][ T1172] R13: 0000000000000012 R14: 00007fff03190060 R15: 0000000000000000 [ 101.215515][ T1172] WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr [ 402.276338][ T1169] veth2: left promiscuous mode