[ 16.898598][ T356] 8021q: 802.1Q VLAN Support v1.8 [ 17.370140][ T362] gre: GRE over IPv4 demultiplexor driver [ 17.417835][ T362] ip6_gre: GRE over IPv6 tunneling driver [ 19.858870][ T395] ip (395) used greatest stack depth: 24024 bytes left [ 27.311848][ T445] GACT probability NOT on [ 27.700795][ T448] [ 27.701033][ T448] ============================= [ 27.701286][ T448] WARNING: suspicious RCU usage [ 27.701571][ T448] 6.14.0-rc6-virtme #1 Not tainted [ 27.701999][ T448] ----------------------------- [ 27.702274][ T448] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 27.702697][ T448] [ 27.702697][ T448] other info that might help us debug this: [ 27.702697][ T448] [ 27.703166][ T448] [ 27.703166][ T448] rcu_scheduler_active = 2, debug_locks = 1 [ 27.703514][ T448] 1 lock held by mausezahn/448: [ 27.703755][ T448] #0: ffffffffb035b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 27.704218][ T448] [ 27.704218][ T448] stack backtrace: [ 27.704511][ T448] CPU: 3 UID: 0 PID: 448 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 27.704518][ T448] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 27.704521][ T448] Call Trace: [ 27.704524][ T448] [ 27.704528][ T448] dump_stack_lvl+0xb0/0xd0 [ 27.704539][ T448] lockdep_rcu_suspicious+0x1ea/0x280 [ 27.704556][ T448] dev_hard_start_xmit+0x2fc/0x3f0 [ 27.704577][ T448] __dev_queue_xmit+0xfaf/0x18d0 [ 27.704605][ T448] ? __pfx___dev_queue_xmit+0x10/0x10 [ 27.704613][ T448] ? packet_parse_headers+0x231/0x9c0 [ 27.704629][ T448] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 27.704639][ T448] ? __pfx_packet_parse_headers+0x10/0x10 [ 27.704648][ T448] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 27.704658][ T448] ? dev_get_by_index+0xb2/0x190 [ 27.704678][ T448] packet_snd+0xd0c/0x19d0 [ 27.704689][ T448] ? __lock_release+0x103/0x460 [ 27.704693][ T448] ? __might_fault+0x11b/0x170 [ 27.704700][ T448] ? __pfx_packet_snd+0x10/0x10 [ 27.704702][ T448] ? trace_lock_acquire+0x14c/0x1f0 [ 27.704704][ T448] ? __might_fault+0x11b/0x170 [ 27.704711][ T448] ? lock_acquire+0x32/0xc0 [ 27.704718][ T448] ? __might_fault+0x11b/0x170 [ 27.704728][ T448] __sys_sendto+0x3c3/0x450 [ 27.704734][ T448] ? __pfx___sys_sendto+0x10/0x10 [ 27.704749][ T448] ? sock_ioctl+0x3b6/0x590 [ 27.704758][ T448] ? __pfx___up_read+0x10/0x10 [ 27.704766][ T448] ? do_user_addr_fault+0x374/0xe30 [ 27.704777][ T448] ? do_user_addr_fault+0x374/0xe30 [ 27.704783][ T448] __x64_sys_sendto+0xe0/0x1c0 [ 27.704787][ T448] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 27.704792][ T448] do_syscall_64+0xc1/0x1d0 [ 27.704800][ T448] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 27.704804][ T448] RIP: 0033:0x7fbd9ef4ca4a [ 27.704809][ T448] 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 [ 27.704812][ T448] RSP: 002b:00007ffd3329e878 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 27.704816][ T448] RAX: ffffffffffffffda RBX: 00000000179fb9d0 RCX: 00007fbd9ef4ca4a [ 27.704818][ T448] RDX: 0000000000000062 RSI: 00000000179fb5c2 RDI: 0000000000000005 [ 27.704819][ T448] RBP: 00000000179fb5c2 R08: 00007ffd3329e880 R09: 0000000000000014 [ 27.704821][ T448] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 27.704823][ T448] R13: 0000000000000062 R14: 00007ffd3329e880 R15: 0000000000000000 [ 27.704838][ T448] [ 45.260326][ T663] ip (663) used greatest stack depth: 23656 bytes left