[ 131.371750][ T1518] [ 131.372084][ T1518] ============================= [ 131.372271][ T1518] WARNING: suspicious RCU usage [ 131.372448][ T1518] 6.14.0-rc6-virtme #1 Not tainted [ 131.372643][ T1518] ----------------------------- [ 131.372833][ T1518] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 131.373148][ T1518] [ 131.373148][ T1518] other info that might help us debug this: [ 131.373148][ T1518] [ 131.373491][ T1518] [ 131.373491][ T1518] rcu_scheduler_active = 2, debug_locks = 1 [ 131.373752][ T1518] 2 locks held by tun/1518: [ 131.373932][ T1518] #0: ffffffff8a96f640 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f5/0x18d0 [ 131.374273][ T1518] #1: ffff88800b555258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+...}-{3:3}, at: __dev_xmit_skb+0x952/0x10a0 [ 131.374672][ T1518] [ 131.374672][ T1518] stack backtrace: [ 131.374891][ T1518] CPU: 1 UID: 0 PID: 1518 Comm: tun Not tainted 6.14.0-rc6-virtme #1 [ 131.374896][ T1518] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 131.374898][ T1518] Call Trace: [ 131.374900][ T1518] [ 131.374903][ T1518] dump_stack_lvl+0xb0/0xd0 [ 131.374911][ T1518] lockdep_rcu_suspicious+0x1ea/0x280 [ 131.374923][ T1518] dev_hard_start_xmit+0x2fc/0x3f0 [ 131.374935][ T1518] sch_direct_xmit+0x212/0x11d0 [ 131.374943][ T1518] ? tun_select_queue+0xf2/0x8e0 [ 131.374948][ T1518] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 131.374954][ T1518] ? __pfx_sch_direct_xmit+0x10/0x10 [ 131.374958][ T1518] ? do_raw_spin_trylock+0xb9/0x190 [ 131.374964][ T1518] ? lock_acquire+0x32/0xc0 [ 131.374966][ T1518] ? __dev_xmit_skb+0x952/0x10a0 [ 131.374977][ T1518] __dev_xmit_skb+0xaec/0x10a0 [ 131.374981][ T1518] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 131.374987][ T1518] ? __pfx___dev_xmit_skb+0x10/0x10 [ 131.374995][ T1518] ? netdev_core_pick_tx+0x115/0x300 [ 131.375004][ T1518] __dev_queue_xmit+0x788/0x18d0 [ 131.375017][ T1518] ? sock_alloc_send_pskb+0x678/0x7f0 [ 131.375026][ T1518] ? __pfx___dev_queue_xmit+0x10/0x10 [ 131.375030][ T1518] ? packet_parse_headers+0x243/0x9d0 [ 131.375041][ T1518] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 131.375047][ T1518] ? __pfx_packet_parse_headers+0x10/0x10 [ 131.375056][ T1518] ? dev_get_by_index+0xb2/0x190 [ 131.375067][ T1518] packet_snd+0xd0d/0x19c0 [ 131.375079][ T1518] ? __lock_release+0x103/0x460 [ 131.375081][ T1518] ? __might_fault+0x11b/0x170 [ 131.375089][ T1518] ? __pfx_packet_snd+0x10/0x10 [ 131.375091][ T1518] ? trace_lock_acquire+0x14c/0x1f0 [ 131.375100][ T1518] ? lock_acquire+0x32/0xc0 [ 131.375106][ T1518] ? __might_fault+0x11b/0x170 [ 131.375118][ T1518] __sys_sendto+0x3c3/0x450 [ 131.375125][ T1518] ? __pfx___sys_sendto+0x10/0x10 [ 131.375129][ T1518] ? __might_fault+0x11b/0x170 [ 131.375150][ T1518] ? fd_install+0x1d6/0x5a0 [ 131.375159][ T1518] ? __x64_sys_openat+0x123/0x1e0 [ 131.375166][ T1518] ? __pfx___x64_sys_openat+0x10/0x10 [ 131.375168][ T1518] ? __pfx_ksys_write+0x10/0x10 [ 131.375178][ T1518] __x64_sys_sendto+0xe0/0x1c0 [ 131.375182][ T1518] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 131.375187][ T1518] do_syscall_64+0xc1/0x1d0 [ 131.375194][ T1518] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 131.375198][ T1518] RIP: 0033:0x7f5196a17a4a [ 131.375202][ T1518] 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 [ 131.375205][ T1518] RSP: 002b:00007fff717a9218 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 131.375208][ T1518] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f5196a17a4a [ 131.375210][ T1518] RDX: 0000000000000000 RSI: 00007fff717a92a4 RDI: 0000000000000006 [ 131.375212][ T1518] RBP: 0000000000000022 R08: 00007fff717a9270 R09: 0000000000000014 [ 131.375214][ T1518] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 131.375216][ T1518] R13: 000000000040a360 R14: 00007f51968bd000 R15: 00007f51968bd000 [ 131.375234][ T1518]