[ 40.601921][ T251] ip (251) used greatest stack depth: 23800 bytes left [ 49.702363][ T327] veth2: entered promiscuous mode [ 50.718311][ T330] [ 50.718799][ T330] ============================= [ 50.719023][ T330] WARNING: suspicious RCU usage [ 50.719220][ T330] 6.14.0-rc6-virtme #1 Not tainted [ 50.719437][ T330] ----------------------------- [ 50.719629][ T330] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 50.719950][ T330] [ 50.719950][ T330] other info that might help us debug this: [ 50.719950][ T330] [ 50.720323][ T330] [ 50.720323][ T330] rcu_scheduler_active = 2, debug_locks = 1 [ 50.720621][ T330] 1 lock held by mausezahn/330: [ 50.720833][ T330] #0: ffffffff9f15b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 50.721227][ T330] [ 50.721227][ T330] stack backtrace: [ 50.721529][ T330] CPU: 2 UID: 0 PID: 330 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 50.721534][ T330] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 50.721536][ T330] Call Trace: [ 50.721538][ T330] [ 50.721541][ T330] dump_stack_lvl+0xb0/0xd0 [ 50.721549][ T330] lockdep_rcu_suspicious+0x1ea/0x280 [ 50.721560][ T330] dev_hard_start_xmit+0x2fc/0x3f0 [ 50.721571][ T330] __dev_queue_xmit+0xfaf/0x18d0 [ 50.721592][ T330] ? __pfx___dev_queue_xmit+0x10/0x10 [ 50.721597][ T330] ? packet_parse_headers+0x231/0x9c0 [ 50.721605][ T330] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 50.721611][ T330] ? __pfx_packet_parse_headers+0x10/0x10 [ 50.721616][ T330] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 50.721624][ T330] ? dev_get_by_index+0xb2/0x190 [ 50.721636][ T330] packet_snd+0xd0c/0x19d0 [ 50.721648][ T330] ? __lock_release+0x103/0x460 [ 50.721652][ T330] ? __might_fault+0x11b/0x170 [ 50.721661][ T330] ? __pfx_packet_snd+0x10/0x10 [ 50.721664][ T330] ? trace_lock_acquire+0x14c/0x1f0 [ 50.721668][ T330] ? __might_fault+0x11b/0x170 [ 50.721675][ T330] ? lock_acquire+0x32/0xc0 [ 50.721682][ T330] ? __might_fault+0x11b/0x170 [ 50.721693][ T330] __sys_sendto+0x3c3/0x450 [ 50.721702][ T330] ? __pfx___sys_sendto+0x10/0x10 [ 50.721718][ T330] ? sock_ioctl+0x3b6/0x590 [ 50.721723][ T330] ? _copy_to_user+0x5c/0x80 [ 50.721731][ T330] ? __pfx_put_timespec64+0x10/0x10 [ 50.721740][ T330] ? posix_cpu_clock_get+0xe1/0x240 [ 50.721749][ T330] ? __x64_sys_clock_gettime+0x17a/0x200 [ 50.721753][ T330] ? __pfx___x64_sys_clock_gettime+0x10/0x10 [ 50.721761][ T330] __x64_sys_sendto+0xe0/0x1c0 [ 50.721764][ T330] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 50.721770][ T330] do_syscall_64+0xc1/0x1d0 [ 50.721778][ T330] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 50.721783][ T330] RIP: 0033:0x7fa68d329a4a [ 50.721788][ T330] 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 [ 50.721791][ T330] RSP: 002b:00007ffefe7d7488 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 50.721795][ T330] RAX: ffffffffffffffda RBX: 0000000007f0c9d0 RCX: 00007fa68d329a4a [ 50.721797][ T330] RDX: 0000000000000012 RSI: 0000000007f0cbd2 RDI: 0000000000000005 [ 50.721799][ T330] RBP: 0000000007f0cbd2 R08: 00007ffefe7d7490 R09: 0000000000000014 [ 50.721801][ T330] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 50.721802][ T330] R13: 0000000000000012 R14: 00007ffefe7d7490 R15: 0000000000000000 [ 50.721818][ T330] [ 68.545397][ T354] 8021q: 802.1Q VLAN Support v1.8 [ 69.129087][ T365] ip (365) used greatest stack depth: 23584 bytes left WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr [ 370.505245][ T327] veth2: left promiscuous mode WAIT TIMEOUT stderr