[ 2.210408] ip (247) used greatest stack depth: 12320 bytes left [ 7.714908] veth2: entered promiscuous mode [ 24.973458] 8021q: 802.1Q VLAN Support v1.8 [ 45.604543] ------------[ cut here ]------------ [ 45.604651] refcount_t: underflow; use-after-free. [ 45.604715] WARNING: CPU: 3 PID: 387 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 45.604805] Modules linked in: 8021q vrf veth [ 45.604869] CPU: 3 UID: 0 PID: 387 Comm: ip Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 45.604952] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 45.605008] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 45.605069] Code: 9f e8 18 df ba ff 90 0f 0b 90 90 c3 80 3d f9 da eb 00 00 75 89 c6 05 f0 da eb 00 01 90 48 c7 c7 28 e0 b1 9f e8 f5 de ba ff 90 <0f> 0b 90 90 c3 80 3d d4 da eb 00 00 0f 85 62 ff ff ff c6 05 c7 da [ 45.605209] RSP: 0018:ffffbb0380333730 EFLAGS: 00010282 [ 45.605254] RAX: 0000000000000000 RBX: ffffbb0380333740 RCX: 00000000ffffdfff [ 45.605317] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 45.605380] RBP: ffffbb0380333248 R08: ffffffff9ff56a28 R09: 00000000ffffdfff [ 45.605450] R10: ffffffff9fe76a40 R11: ffffffff9ff26a40 R12: dead000000000122 [ 45.605538] R13: 00000000fffc1dbd R14: 0000000000000001 R15: ffff991043288000 [ 45.605609] FS: 00007f165b87f800(0000) GS:ffff9910de759000(0000) knlGS:0000000000000000 [ 45.605681] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.605737] CR2: 00000000004e6680 CR3: 0000000001b5c001 CR4: 0000000000772ef0 [ 45.605815] PKRU: 55555554 [ 45.605839] Call Trace: [ 45.605867] [ 45.605897] netdev_run_todo+0x21a/0x550 [ 45.605962] rtnl_dellink+0x15b/0x350 [ 45.606009] ? virtio_fs_enqueue_req+0x352/0x570 [ 45.606062] ? netdev_run_todo+0x63/0x550 [ 45.606101] ? rtnl_bridge_getlink+0x1a0/0x1a0 [ 45.606147] rtnetlink_rcv_msg+0x358/0x400 [ 45.606188] ? get_page_from_freelist+0x15b4/0x1770 [ 45.606240] ? rtnl_calcit.isra.0+0x110/0x110 [ 45.606283] netlink_rcv_skb+0x57/0x100 [ 45.606327] netlink_unicast+0x252/0x380 [ 45.606365] ? __alloc_skb+0xdb/0x190 [ 45.606404] netlink_sendmsg+0x1be/0x3e0 [ 45.606442] ____sys_sendmsg+0x132/0x260 [ 45.606484] ? copy_msghdr_from_user+0x6c/0xa0 [ 45.606553] ___sys_sendmsg+0x87/0xd0 [ 45.606592] ? do_wp_page+0x369/0xe90 [ 45.606634] ? ___pte_offset_map+0x1b/0xd0 [ 45.606680] ? nfulnl_rcv_nl_event+0x36/0xa0 [ 45.606731] ? fsnotify_grab_connector+0x48/0x80 [ 45.606797] ? fsnotify_destroy_marks+0x29/0x150 [ 45.606843] __sys_sendmsg+0x71/0xd0 [ 45.606883] do_syscall_64+0xa4/0xfd0 [ 45.606934] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 45.606984] RIP: 0033:0x7f165ba4d1d7 [ 45.607027] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 45.607175] RSP: 002b:00007fff6211c4e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 45.607243] RAX: ffffffffffffffda RBX: 00007fff6211cc10 RCX: 00007f165ba4d1d7 [ 45.607313] RDX: 0000000000000000 RSI: 00007fff6211c550 RDI: 0000000000000005 [ 45.607384] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 45.607445] R10: 00007f165b949f60 R11: 0000000000000246 R12: 0000000000000002 [ 45.607515] R13: 00000000690de951 R14: 0000000000499600 R15: 0000000000000000 [ 45.607596] [ 45.607619] ---[ end trace 0000000000000000 ]--- [ 45.608342] ip (387) used greatest stack depth: 11744 bytes left [ 334.346077] veth2: left promiscuous mode [ 337.982545] br0: port 1(veth1) entered blocking state [ 337.982625] br0: port 1(veth1) entered disabled state [ 337.982749] veth1: entered allmulticast mode [ 337.982859] veth1: entered promiscuous mode [ 337.982918] br0: port 1(veth1) entered blocking state [ 337.982977] br0: port 1(veth1) entered forwarding state [ 337.993320] br1: port 1(veth3) entered blocking state [ 337.993398] br1: port 1(veth3) entered disabled state [ 337.993461] veth3: entered allmulticast mode [ 337.993570] veth3: entered promiscuous mode [ 337.993632] br1: port 1(veth3) entered blocking state [ 337.993692] br1: port 1(veth3) entered forwarding state [ 338.068564] veth2: entered promiscuous mode WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr [ 639.193212] veth2: left promiscuous mode WAIT TIMEOUT stderr