[ 1239.574974][T11750] [ 1239.575300][T11750] ============================= [ 1239.575484][T11750] WARNING: suspicious RCU usage [ 1239.575661][T11750] 6.14.0-rc6-virtme #1 Not tainted [ 1239.575840][T11750] ----------------------------- [ 1239.576030][T11750] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 1239.576337][T11750] [ 1239.576337][T11750] other info that might help us debug this: [ 1239.576337][T11750] [ 1239.576671][T11750] [ 1239.576671][T11750] rcu_scheduler_active = 2, debug_locks = 1 [ 1239.576943][T11750] 2 locks held by tun/11750: [ 1239.577120][T11750] #0: ffffffffa536f640 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f5/0x18d0 [ 1239.577449][T11750] #1: ffff888011d4ea58 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+...}-{3:3}, at: __dev_xmit_skb+0x952/0x10a0 [ 1239.577850][T11750] [ 1239.577850][T11750] stack backtrace: [ 1239.578074][T11750] CPU: 0 UID: 0 PID: 11750 Comm: tun Not tainted 6.14.0-rc6-virtme #1 [ 1239.578078][T11750] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1239.578082][T11750] Call Trace: [ 1239.578084][T11750] [ 1239.578086][T11750] dump_stack_lvl+0xb0/0xd0 [ 1239.578096][T11750] lockdep_rcu_suspicious+0x1ea/0x280 [ 1239.578109][T11750] dev_hard_start_xmit+0x2fc/0x3f0 [ 1239.578121][T11750] sch_direct_xmit+0x212/0x11d0 [ 1239.578129][T11750] ? tun_select_queue+0xf2/0x8e0 [ 1239.578134][T11750] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1239.578139][T11750] ? __pfx_sch_direct_xmit+0x10/0x10 [ 1239.578143][T11750] ? do_raw_spin_trylock+0xb9/0x190 [ 1239.578150][T11750] ? lock_acquire+0x32/0xc0 [ 1239.578152][T11750] ? __dev_xmit_skb+0x952/0x10a0 [ 1239.578163][T11750] __dev_xmit_skb+0xaec/0x10a0 [ 1239.578167][T11750] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1239.578173][T11750] ? __pfx___dev_xmit_skb+0x10/0x10 [ 1239.578181][T11750] ? netdev_core_pick_tx+0x115/0x300 [ 1239.578190][T11750] __dev_queue_xmit+0x788/0x18d0 [ 1239.578203][T11750] ? sock_alloc_send_pskb+0x678/0x7f0 [ 1239.578211][T11750] ? __pfx___dev_queue_xmit+0x10/0x10 [ 1239.578216][T11750] ? packet_parse_headers+0x243/0x9d0 [ 1239.578227][T11750] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 1239.578232][T11750] ? __pfx_packet_parse_headers+0x10/0x10 [ 1239.578240][T11750] ? dev_get_by_index+0xb2/0x190 [ 1239.578251][T11750] packet_snd+0xd0d/0x19c0 [ 1239.578264][T11750] ? __lock_release+0x103/0x460 [ 1239.578266][T11750] ? __might_fault+0x11b/0x170 [ 1239.578278][T11750] ? __pfx_packet_snd+0x10/0x10 [ 1239.578281][T11750] ? trace_lock_acquire+0x14c/0x1f0 [ 1239.578289][T11750] ? lock_acquire+0x32/0xc0 [ 1239.578295][T11750] ? __might_fault+0x11b/0x170 [ 1239.578307][T11750] __sys_sendto+0x3c3/0x450 [ 1239.578314][T11750] ? __pfx___sys_sendto+0x10/0x10 [ 1239.578318][T11750] ? __might_fault+0x11b/0x170 [ 1239.578339][T11750] ? fd_install+0x1d6/0x5a0 [ 1239.578348][T11750] ? __x64_sys_openat+0x123/0x1e0 [ 1239.578356][T11750] ? __pfx___x64_sys_openat+0x10/0x10 [ 1239.578359][T11750] ? __pfx_ksys_write+0x10/0x10 [ 1239.578368][T11750] __x64_sys_sendto+0xe0/0x1c0 [ 1239.578373][T11750] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 1239.578378][T11750] do_syscall_64+0xc1/0x1d0 [ 1239.578390][T11750] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1239.578398][T11750] RIP: 0033:0x7fefeebdea4a [ 1239.578402][T11750] 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 [ 1239.578405][T11750] RSP: 002b:00007ffcc0c19d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 1239.578409][T11750] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fefeebdea4a [ 1239.578411][T11750] RDX: 0000000000000000 RSI: 00007ffcc0c19e24 RDI: 0000000000000006 [ 1239.578413][T11750] RBP: 0000000000000022 R08: 00007ffcc0c19df0 R09: 0000000000000014 [ 1239.578415][T11750] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 1239.578416][T11750] R13: 000000000040a360 R14: 00007fefeea84000 R15: 00007fefeea84000 [ 1239.578434][T11750]