[ 10.334684][ T267] [ 10.334969][ T267] ============================= [ 10.335189][ T267] WARNING: suspicious RCU usage [ 10.335372][ T267] 6.14.0-rc6-virtme #1 Not tainted [ 10.335545][ T267] ----------------------------- [ 10.335715][ T267] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 10.336052][ T267] [ 10.336052][ T267] other info that might help us debug this: [ 10.336052][ T267] [ 10.336402][ T267] [ 10.336402][ T267] rcu_scheduler_active = 2, debug_locks = 1 [ 10.336650][ T267] 2 locks held by tun/267: [ 10.336821][ T267] #0: ffffffff9616f640 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f5/0x18d0 [ 10.337165][ T267] #1: ffff88800bca8a58 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+...}-{3:3}, at: __dev_xmit_skb+0x952/0x10a0 [ 10.337566][ T267] [ 10.337566][ T267] stack backtrace: [ 10.337777][ T267] CPU: 1 UID: 0 PID: 267 Comm: tun Not tainted 6.14.0-rc6-virtme #1 [ 10.337782][ T267] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 10.337784][ T267] Call Trace: [ 10.337786][ T267] [ 10.337788][ T267] dump_stack_lvl+0xb0/0xd0 [ 10.337798][ T267] lockdep_rcu_suspicious+0x1ea/0x280 [ 10.337812][ T267] dev_hard_start_xmit+0x2fc/0x3f0 [ 10.337824][ T267] sch_direct_xmit+0x212/0x11d0 [ 10.337833][ T267] ? tun_select_queue+0xf2/0x8e0 [ 10.337840][ T267] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 10.337846][ T267] ? __pfx_sch_direct_xmit+0x10/0x10 [ 10.337849][ T267] ? do_raw_spin_trylock+0xb9/0x190 [ 10.337856][ T267] ? lock_acquire+0x32/0xc0 [ 10.337859][ T267] ? __dev_xmit_skb+0x952/0x10a0 [ 10.337869][ T267] __dev_xmit_skb+0xaec/0x10a0 [ 10.337873][ T267] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 10.337879][ T267] ? __pfx___dev_xmit_skb+0x10/0x10 [ 10.337887][ T267] ? netdev_core_pick_tx+0x115/0x300 [ 10.337896][ T267] __dev_queue_xmit+0x788/0x18d0 [ 10.337908][ T267] ? sock_alloc_send_pskb+0x678/0x7f0 [ 10.337918][ T267] ? __pfx___dev_queue_xmit+0x10/0x10 [ 10.337922][ T267] ? packet_parse_headers+0x243/0x9d0 [ 10.337935][ T267] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 10.337940][ T267] ? __pfx_packet_parse_headers+0x10/0x10 [ 10.337948][ T267] ? dev_get_by_index+0xb2/0x190 [ 10.337960][ T267] packet_snd+0xd0d/0x19c0 [ 10.337973][ T267] ? __lock_release+0x103/0x460 [ 10.337975][ T267] ? __might_fault+0x11b/0x170 [ 10.337983][ T267] ? __pfx_packet_snd+0x10/0x10 [ 10.337986][ T267] ? trace_lock_acquire+0x14c/0x1f0 [ 10.337994][ T267] ? lock_acquire+0x32/0xc0 [ 10.338000][ T267] ? __might_fault+0x11b/0x170 [ 10.338012][ T267] __sys_sendto+0x3c3/0x450 [ 10.338020][ T267] ? __pfx___sys_sendto+0x10/0x10 [ 10.338025][ T267] ? __might_fault+0x11b/0x170 [ 10.338045][ T267] ? __rseq_handle_notify_resume+0x288/0x3e0 [ 10.338060][ T267] ? __x64_sys_openat+0x123/0x1e0 [ 10.338068][ T267] ? __pfx___x64_sys_openat+0x10/0x10 [ 10.338071][ T267] ? __pfx_ksys_write+0x10/0x10 [ 10.338080][ T267] __x64_sys_sendto+0xe0/0x1c0 [ 10.338085][ T267] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 10.338090][ T267] do_syscall_64+0xc1/0x1d0 [ 10.338098][ T267] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 10.338104][ T267] RIP: 0033:0x7fc238063a4a [ 10.338109][ T267] 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 [ 10.338111][ T267] RSP: 002b:00007ffdbe2acdb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 10.338115][ T267] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fc238063a4a [ 10.338117][ T267] RDX: 0000000000000000 RSI: 00007ffdbe2ace44 RDI: 0000000000000006 [ 10.338119][ T267] RBP: 0000000000000022 R08: 00007ffdbe2ace10 R09: 0000000000000014 [ 10.338120][ T267] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 10.338122][ T267] R13: 000000000040a360 R14: 00007fc237f09000 R15: 00007fc237f09000 [ 10.338140][ T267]