[ 10.633024][ T252] ip (252) used greatest stack depth: 23528 bytes left [ 15.745497][ T338] 8021q: 802.1Q VLAN Support v1.8 [ 16.065540][ T343] gre: GRE over IPv4 demultiplexor driver [ 16.113327][ T343] ip6_gre: GRE over IPv6 tunneling driver [ 25.142210][ T419] GACT probability NOT on [ 25.471988][ T422] [ 25.472339][ T422] ============================= [ 25.472516][ T422] WARNING: suspicious RCU usage [ 25.472676][ T422] 6.14.0-rc6-virtme #1 Not tainted [ 25.472842][ T422] ----------------------------- [ 25.473132][ T422] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 25.473417][ T422] [ 25.473417][ T422] other info that might help us debug this: [ 25.473417][ T422] [ 25.473762][ T422] [ 25.473762][ T422] rcu_scheduler_active = 2, debug_locks = 1 [ 25.473997][ T422] 1 lock held by mausezahn/422: [ 25.474160][ T422] #0: ffffffffa155b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 25.474465][ T422] [ 25.474465][ T422] stack backtrace: [ 25.474664][ T422] CPU: 2 UID: 0 PID: 422 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 25.474668][ T422] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 25.474670][ T422] Call Trace: [ 25.474672][ T422] [ 25.474674][ T422] dump_stack_lvl+0xb0/0xd0 [ 25.474681][ T422] lockdep_rcu_suspicious+0x1ea/0x280 [ 25.474691][ T422] dev_hard_start_xmit+0x2fc/0x3f0 [ 25.474702][ T422] __dev_queue_xmit+0xfaf/0x18d0 [ 25.474716][ T422] ? __pfx___dev_queue_xmit+0x10/0x10 [ 25.474720][ T422] ? packet_parse_headers+0x231/0x9c0 [ 25.474728][ T422] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 25.474734][ T422] ? __pfx_packet_parse_headers+0x10/0x10 [ 25.474739][ T422] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 25.474744][ T422] ? dev_get_by_index+0xb2/0x190 [ 25.474755][ T422] packet_snd+0xd0c/0x19d0 [ 25.474766][ T422] ? __lock_release+0x103/0x460 [ 25.474770][ T422] ? __might_fault+0x11b/0x170 [ 25.474777][ T422] ? __pfx_packet_snd+0x10/0x10 [ 25.474779][ T422] ? trace_lock_acquire+0x14c/0x1f0 [ 25.474781][ T422] ? __might_fault+0x11b/0x170 [ 25.474790][ T422] ? lock_acquire+0x32/0xc0 [ 25.474798][ T422] ? __might_fault+0x11b/0x170 [ 25.474813][ T422] __sys_sendto+0x3c3/0x450 [ 25.474820][ T422] ? __pfx___sys_sendto+0x10/0x10 [ 25.474840][ T422] ? sock_ioctl+0x3b6/0x590 [ 25.474856][ T422] ? __pfx___up_read+0x10/0x10 [ 25.474866][ T422] ? do_user_addr_fault+0x374/0xe30 [ 25.474877][ T422] ? do_user_addr_fault+0x374/0xe30 [ 25.474883][ T422] __x64_sys_sendto+0xe0/0x1c0 [ 25.474887][ T422] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 25.474893][ T422] do_syscall_64+0xc1/0x1d0 [ 25.474900][ T422] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 25.474904][ T422] RIP: 0033:0x7fa00b7eda4a [ 25.474909][ T422] 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 [ 25.474912][ T422] RSP: 002b:00007fff27fe4798 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 25.474915][ T422] RAX: ffffffffffffffda RBX: 00000000369f19d0 RCX: 00007fa00b7eda4a [ 25.474918][ T422] RDX: 0000000000000062 RSI: 00000000369f15c2 RDI: 0000000000000005 [ 25.474919][ T422] RBP: 00000000369f15c2 R08: 00007fff27fe47a0 R09: 0000000000000014 [ 25.474921][ T422] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 25.474923][ T422] R13: 0000000000000062 R14: 00007fff27fe47a0 R15: 0000000000000000 [ 25.474939][ T422]