[ 2.534727] ------------[ cut here ]------------ [ 2.534936] refcount_t: underflow; use-after-free. [ 2.535100] WARNING: CPU: 2 PID: 280 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 2.535200] Modules linked in: bridge stp llc veth [ 2.535269] CPU: 2 UID: 0 PID: 280 Comm: ip Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 2.535374] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 2.535496] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 2.535561] Code: 8e 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 d1 8e 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 [ 2.535723] RSP: 0018:ffffb3fd4029b730 EFLAGS: 00010282 [ 2.535786] RAX: 0000000000000000 RBX: ffffb3fd4029b740 RCX: 00000000ffffdfff [ 2.535867] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 2.535950] RBP: ffffb3fd4029b248 R08: ffffffff8f156a28 R09: 00000000ffffdfff [ 2.536045] R10: ffffffff8f076a40 R11: ffffffff8f126a40 R12: dead000000000122 [ 2.536135] R13: 00000000fffb7588 R14: 0000000000000001 R15: ffff97c28112d000 [ 2.536250] FS: 00007f7d9fd6f800(0000) GS:ffff97c32f4d9000(0000) knlGS:0000000000000000 [ 2.536329] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.536402] CR2: 00007f6a9b578998 CR3: 0000000005abc001 CR4: 0000000000772ef0 [ 2.536484] PKRU: 55555554 [ 2.536524] Call Trace: [ 2.536565] [ 2.536604] netdev_run_todo+0x21a/0x550 [ 2.536664] rtnl_dellink+0x15b/0x350 [ 2.536754] ? virtio_fs_enqueue_req+0x352/0x570 [ 2.536813] ? netdev_run_todo+0x63/0x550 [ 2.536869] ? rtnl_bridge_getlink+0x1a0/0x1a0 [ 2.536926] rtnetlink_rcv_msg+0x358/0x400 [ 2.536983] ? get_page_from_freelist+0x15b4/0x1770 [ 2.537049] ? rtnl_calcit.isra.0+0x110/0x110 [ 2.537113] netlink_rcv_skb+0x57/0x100 [ 2.537177] netlink_unicast+0x252/0x380 [ 2.537240] ? __alloc_skb+0xdb/0x190 [ 2.537319] netlink_sendmsg+0x1be/0x3e0 [ 2.537384] ____sys_sendmsg+0x132/0x260 [ 2.537442] ? copy_msghdr_from_user+0x6c/0xa0 [ 2.537505] ___sys_sendmsg+0x87/0xd0 [ 2.537560] ? do_wp_page+0x369/0xe90 [ 2.537619] ? ___pte_offset_map+0x1b/0xd0 [ 2.537692] ? nfulnl_rcv_nl_event+0x36/0xa0 [ 2.537761] ? fsnotify_grab_connector+0x48/0x80 [ 2.537826] ? fsnotify_destroy_marks+0x29/0x150 [ 2.537923] __sys_sendmsg+0x71/0xd0 [ 2.537989] do_syscall_64+0xa4/0xfd0 [ 2.538072] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 2.538132] RIP: 0033:0x7f7d9ff3d1d7 [ 2.538188] 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 [ 2.538361] RSP: 002b:00007ffe6b79cd98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 2.538443] RAX: ffffffffffffffda RBX: 00007ffe6b79d4c0 RCX: 00007f7d9ff3d1d7 [ 2.538519] RDX: 0000000000000000 RSI: 00007ffe6b79ce00 RDI: 0000000000000005 [ 2.538595] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 2.538688] R10: 00007f7d9fe39f60 R11: 0000000000000246 R12: 0000000000000002 [ 2.538765] R13: 00000000690de84e R14: 0000000000499600 R15: 0000000000000000 [ 2.538844] [ 2.538895] ---[ end trace 0000000000000000 ]--- [ 2.539589] ip (280) used greatest stack depth: 11744 bytes left [ 2.827132] br0: port 1(veth1) entered blocking state [ 2.827217] br0: port 1(veth1) entered disabled state [ 2.827339] veth1: entered allmulticast mode [ 2.827453] veth1: entered promiscuous mode [ 2.839938] br0: port 2(veth3) entered blocking state [ 2.840025] br0: port 2(veth3) entered disabled state [ 2.840103] veth3: entered allmulticast mode [ 2.840245] veth3: entered promiscuous mode [ 2.886609] br0: port 1(veth1) entered blocking state [ 2.886734] br0: port 1(veth1) entered forwarding state [ 2.898522] br0: port 2(veth3) entered blocking state [ 2.898607] br0: port 2(veth3) entered forwarding state [ 5.871791] br0: port 3(veth5) entered blocking state [ 5.871928] br0: port 3(veth5) entered disabled state [ 5.871994] veth5: entered allmulticast mode [ 5.872111] veth5: entered promiscuous mode [ 5.902541] veth5: left allmulticast mode [ 5.902607] veth5: left promiscuous mode [ 5.902653] br0: port 3(veth5) entered disabled state [ 6.028106] br0: port 3(veth5) entered blocking state [ 6.028222] br0: port 3(veth5) entered disabled state [ 6.028315] veth5: entered allmulticast mode [ 6.028456] veth5: entered promiscuous mode [ 6.028527] br0: adding interface veth5 with same address as a received packet (addr:de:ad:be:ef:42:00, vlan:0) [ 6.057240] veth5: left allmulticast mode [ 6.057343] veth5: left promiscuous mode [ 6.057418] br0: port 3(veth5) entered disabled state [ 12.834390] br0: port 3(veth5) entered blocking state [ 12.834473] br0: port 3(veth5) entered disabled state [ 12.834542] veth5: entered allmulticast mode [ 12.834665] veth5: entered promiscuous mode [ 12.868042] br0: port 3(veth5) entered disabled state [ 12.879619] br0: port 2(veth3) entered disabled state [ 12.890423] br0: port 1(veth1) entered disabled state [ 12.902458] veth5: left allmulticast mode [ 12.902535] veth5: left promiscuous mode [ 12.902592] br0: port 3(veth5) entered disabled state [ 12.902728] veth3: left allmulticast mode [ 12.902776] veth3: left promiscuous mode [ 12.902820] br0: port 2(veth3) entered disabled state [ 12.902928] veth1: left allmulticast mode [ 12.903008] veth1: left promiscuous mode [ 12.903056] br0: port 1(veth1) entered disabled state