[ 10.667996][ T256] ip (256) used greatest stack depth: 23816 bytes left [ 11.197625][ T257] [ 11.197962][ T257] ============================= [ 11.198154][ T257] WARNING: suspicious RCU usage [ 11.198325][ T257] 6.14.0-rc6-virtme #1 Not tainted [ 11.198651][ T257] ----------------------------- [ 11.198820][ T257] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 11.199132][ T257] [ 11.199132][ T257] other info that might help us debug this: [ 11.199132][ T257] [ 11.199441][ T257] [ 11.199441][ T257] rcu_scheduler_active = 2, debug_locks = 1 [ 11.199682][ T257] 1 lock held by psock_snd/257: [ 11.199852][ T257] #0: ffffffffa6f6f640 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f5/0x18d0 [ 11.200175][ T257] [ 11.200175][ T257] stack backtrace: [ 11.200380][ T257] CPU: 2 UID: 0 PID: 257 Comm: psock_snd Not tainted 6.14.0-rc6-virtme #1 [ 11.200384][ T257] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.200386][ T257] Call Trace: [ 11.200387][ T257] [ 11.200390][ T257] dump_stack_lvl+0xb0/0xd0 [ 11.200398][ T257] lockdep_rcu_suspicious+0x1ea/0x280 [ 11.200409][ T257] dev_hard_start_xmit+0x2fc/0x3f0 [ 11.200420][ T257] __dev_queue_xmit+0xfaa/0x18d0 [ 11.200424][ T257] ? _copy_from_iter+0x1d2/0x12e0 [ 11.200442][ T257] ? __pfx___dev_queue_xmit+0x10/0x10 [ 11.200447][ T257] ? packet_parse_headers+0x243/0x9d0 [ 11.200457][ T257] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 11.200464][ T257] ? __pfx_packet_parse_headers+0x10/0x10 [ 11.200469][ T257] ? skb_copy_datagram_from_iter+0xe6/0x6e0 [ 11.200475][ T257] ? dev_get_by_index+0xb2/0x190 [ 11.200486][ T257] packet_snd+0xd0d/0x19c0 [ 11.200498][ T257] ? __lock_release+0x103/0x460 [ 11.200501][ T257] ? __might_fault+0x11b/0x170 [ 11.200507][ T257] ? __pfx_packet_snd+0x10/0x10 [ 11.200509][ T257] ? trace_lock_acquire+0x14c/0x1f0 [ 11.200517][ T257] ? lock_acquire+0x32/0xc0 [ 11.200523][ T257] ? __might_fault+0x11b/0x170 [ 11.200534][ T257] __sys_sendto+0x3c3/0x450 [ 11.200540][ T257] ? __pfx___sys_sendto+0x10/0x10 [ 11.200543][ T257] ? find_held_lock+0x2c/0x110 [ 11.200555][ T257] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.200566][ T257] ? __virt_addr_valid+0x22b/0x430 [ 11.200574][ T257] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 11.200578][ T257] ? trace_rcu_segcb_stats+0x36/0x1e0 [ 11.200587][ T257] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 11.200590][ T257] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 11.200598][ T257] __x64_sys_sendto+0xe0/0x1c0 [ 11.200602][ T257] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 11.200607][ T257] do_syscall_64+0xc1/0x1d0 [ 11.200615][ T257] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.200619][ T257] RIP: 0033:0x7f1d0836ea4a [ 11.200624][ T257] 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 [ 11.200626][ T257] RSP: 002b:00007fff8a6521f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 11.200630][ T257] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1d0836ea4a [ 11.200632][ T257] RDX: 0000000000000080 RSI: 0000000000414138 RDI: 0000000000000007 [ 11.200633][ T257] RBP: 0000000000000006 R08: 00007fff8a652230 R09: 0000000000000014 [ 11.200635][ T257] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 [ 11.200637][ T257] R13: 0000000000000007 R14: 00007fff8a652230 R15: 0000000000000080 [ 11.200653][ T257] [ 28.211124][ C2] IPv4: Oversized IP packet from 172.17.0.2