[ 10.973339][ T257] [ 10.973583][ T257] ============================= [ 10.973841][ T257] WARNING: suspicious RCU usage [ 10.974013][ T257] 6.14.0-rc6-virtme #1 Not tainted [ 10.974163][ T257] ----------------------------- [ 10.974325][ T257] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 10.974592][ T257] [ 10.974592][ T257] other info that might help us debug this: [ 10.974592][ T257] [ 10.974905][ T257] [ 10.974905][ T257] rcu_scheduler_active = 2, debug_locks = 1 [ 10.975145][ T257] 1 lock held by psock_snd/257: [ 10.975297][ T257] #0: ffffffffac16f640 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f5/0x18d0 [ 10.975575][ T257] [ 10.975575][ T257] stack backtrace: [ 10.975762][ T257] CPU: 3 UID: 0 PID: 257 Comm: psock_snd Not tainted 6.14.0-rc6-virtme #1 [ 10.975765][ T257] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 10.975767][ T257] Call Trace: [ 10.975769][ T257] [ 10.975771][ T257] dump_stack_lvl+0xb0/0xd0 [ 10.975779][ T257] lockdep_rcu_suspicious+0x1ea/0x280 [ 10.975789][ T257] dev_hard_start_xmit+0x2fc/0x3f0 [ 10.975800][ T257] __dev_queue_xmit+0xfaa/0x18d0 [ 10.975804][ T257] ? _copy_from_iter+0x1d2/0x12e0 [ 10.975820][ T257] ? __pfx___dev_queue_xmit+0x10/0x10 [ 10.975825][ T257] ? packet_parse_headers+0x243/0x9d0 [ 10.975834][ T257] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 10.975841][ T257] ? __pfx_packet_parse_headers+0x10/0x10 [ 10.975849][ T257] ? skb_copy_datagram_from_iter+0xe6/0x6e0 [ 10.975855][ T257] ? dev_get_by_index+0xb2/0x190 [ 10.975864][ T257] packet_snd+0xd0d/0x19c0 [ 10.975876][ T257] ? __lock_release+0x103/0x460 [ 10.975879][ T257] ? __might_fault+0x11b/0x170 [ 10.975885][ T257] ? __pfx_packet_snd+0x10/0x10 [ 10.975887][ T257] ? trace_lock_acquire+0x14c/0x1f0 [ 10.975895][ T257] ? lock_acquire+0x32/0xc0 [ 10.975900][ T257] ? __might_fault+0x11b/0x170 [ 10.975910][ T257] __sys_sendto+0x3c3/0x450 [ 10.975917][ T257] ? __pfx___sys_sendto+0x10/0x10 [ 10.975920][ T257] ? find_held_lock+0x2c/0x110 [ 10.975930][ T257] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 10.975941][ T257] ? __virt_addr_valid+0x22b/0x430 [ 10.975949][ T257] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 10.975953][ T257] ? trace_rcu_segcb_stats+0x36/0x1e0 [ 10.975962][ T257] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 10.975965][ T257] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 10.975973][ T257] __x64_sys_sendto+0xe0/0x1c0 [ 10.975977][ T257] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 10.975981][ T257] do_syscall_64+0xc1/0x1d0 [ 10.975989][ T257] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 10.975993][ T257] RIP: 0033:0x7f8a42528a4a [ 10.975997][ 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 [ 10.976000][ T257] RSP: 002b:00007fff6e8648d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 10.976004][ T257] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8a42528a4a [ 10.976006][ T257] RDX: 0000000000000080 RSI: 0000000000414138 RDI: 0000000000000007 [ 10.976007][ T257] RBP: 0000000000000006 R08: 00007fff6e864910 R09: 0000000000000014 [ 10.976009][ T257] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 [ 10.976011][ T257] R13: 0000000000000007 R14: 00007fff6e864910 R15: 0000000000000080 [ 10.976026][ T257] [ 11.425839][ T265] ip (265) used greatest stack depth: 23808 bytes left [ 28.207163][ C0] IPv4: Oversized IP packet from 172.17.0.2