[ 2.122113] ip (249) used greatest stack depth: 12392 bytes left [ 2.216419] ip (263) used greatest stack depth: 12328 bytes left [ 2.411039] ------------[ cut here ]------------ [ 2.411173] refcount_t: underflow; use-after-free. [ 2.411248] WARNING: CPU: 0 PID: 281 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 2.411340] Modules linked in: bridge stp llc veth [ 2.411407] CPU: 0 UID: 0 PID: 281 Comm: ip Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 2.411499] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 2.411566] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 2.411627] Code: b2 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 f1 b2 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 [ 2.411809] RSP: 0018:ffffa410c02a3730 EFLAGS: 00010282 [ 2.411864] RAX: 0000000000000000 RBX: ffffa410c02a3740 RCX: 00000000ffffdfff [ 2.411942] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 2.412024] RBP: ffffa410c02a3248 R08: ffffffffb3356a28 R09: 00000000ffffdfff [ 2.412107] R10: ffffffffb3276a40 R11: ffffffffb3326a40 R12: dead000000000122 [ 2.412182] R13: 00000000fffb7506 R14: 0000000000000001 R15: ffff90ae0622b000 [ 2.412262] FS: 00007f782595d800(0000) GS:ffff90ae8b1d9000(0000) knlGS:0000000000000000 [ 2.412344] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.412416] CR2: 00007f75d9b95d10 CR3: 000000000519d006 CR4: 0000000000772ef0 [ 2.412486] PKRU: 55555554 [ 2.412509] Call Trace: [ 2.412536] [ 2.412568] netdev_run_todo+0x21a/0x550 [ 2.412621] rtnl_dellink+0x15b/0x350 [ 2.412666] ? virtio_fs_enqueue_req+0x352/0x570 [ 2.412730] ? netdev_run_todo+0x63/0x550 [ 2.412769] ? rtnl_bridge_getlink+0x1a0/0x1a0 [ 2.412826] rtnetlink_rcv_msg+0x358/0x400 [ 2.412864] ? get_page_from_freelist+0x15b4/0x1770 [ 2.412924] ? rtnl_calcit.isra.0+0x110/0x110 [ 2.412974] netlink_rcv_skb+0x57/0x100 [ 2.413026] netlink_unicast+0x252/0x380 [ 2.413068] ? __alloc_skb+0xdb/0x190 [ 2.413112] netlink_sendmsg+0x1be/0x3e0 [ 2.413151] ____sys_sendmsg+0x132/0x260 [ 2.413198] ? copy_msghdr_from_user+0x6c/0xa0 [ 2.413258] ___sys_sendmsg+0x87/0xd0 [ 2.413302] ? do_wp_page+0x369/0xe90 [ 2.413348] ? ___pte_offset_map+0x1b/0xd0 [ 2.413386] ? nfulnl_rcv_nl_event+0x36/0xa0 [ 2.413445] ? fsnotify_grab_connector+0x48/0x80 [ 2.413504] ? fsnotify_destroy_marks+0x29/0x150 [ 2.413557] __sys_sendmsg+0x71/0xd0 [ 2.413605] do_syscall_64+0xa4/0xfd0 [ 2.413651] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 2.413707] RIP: 0033:0x7f7825b2b1d7 [ 2.413756] 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 [ 2.413938] RSP: 002b:00007ffc0ac2cd28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 2.414014] RAX: ffffffffffffffda RBX: 00007ffc0ac2d450 RCX: 00007f7825b2b1d7 [ 2.414094] RDX: 0000000000000000 RSI: 00007ffc0ac2cd90 RDI: 0000000000000005 [ 2.414169] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 2.414241] R10: 00007f7825a27f60 R11: 0000000000000246 R12: 0000000000000002 [ 2.414313] R13: 00000000690dee3e R14: 0000000000499600 R15: 0000000000000000 [ 2.414390] [ 2.414414] ---[ end trace 0000000000000000 ]--- [ 2.415004] ip (281) used greatest stack depth: 11744 bytes left [ 2.672769] br0: port 1(veth1) entered blocking state [ 2.672862] br0: port 1(veth1) entered disabled state [ 2.672933] veth1: entered allmulticast mode [ 2.673048] veth1: entered promiscuous mode [ 2.683938] br0: port 2(veth3) entered blocking state [ 2.684089] br0: port 2(veth3) entered disabled state [ 2.684192] veth3: entered allmulticast mode [ 2.684337] veth3: entered promiscuous mode [ 2.728503] br0: port 1(veth1) entered blocking state [ 2.728630] br0: port 1(veth1) entered forwarding state [ 2.740125] br0: port 2(veth3) entered blocking state [ 2.740224] br0: port 2(veth3) entered forwarding state [ 5.606777] br0: port 3(veth5) entered blocking state [ 5.606862] br0: port 3(veth5) entered disabled state [ 5.606954] veth5: entered allmulticast mode [ 5.607076] veth5: entered promiscuous mode [ 5.633870] veth5: left allmulticast mode [ 5.633932] veth5: left promiscuous mode [ 5.633993] br0: port 3(veth5) entered disabled state [ 5.761067] br0: port 3(veth5) entered blocking state [ 5.761153] br0: port 3(veth5) entered disabled state [ 5.761225] veth5: entered allmulticast mode [ 5.761340] veth5: entered promiscuous mode [ 5.761390] br0: adding interface veth5 with same address as a received packet (addr:de:ad:be:ef:42:00, vlan:0) [ 5.787697] veth5: left allmulticast mode [ 5.787763] veth5: left promiscuous mode [ 5.787810] br0: port 3(veth5) entered disabled state [ 12.319905] br0: port 3(veth5) entered blocking state [ 12.319974] br0: port 3(veth5) entered disabled state [ 12.320037] veth5: entered allmulticast mode [ 12.320133] veth5: entered promiscuous mode [ 12.351324] br0: port 3(veth5) entered disabled state [ 12.360648] br0: port 2(veth3) entered disabled state [ 12.370914] br0: port 1(veth1) entered disabled state [ 12.380052] veth5: left allmulticast mode [ 12.380146] veth5: left promiscuous mode [ 12.380209] br0: port 3(veth5) entered disabled state [ 12.380342] veth3: left allmulticast mode [ 12.380425] veth3: left promiscuous mode [ 12.380478] br0: port 2(veth3) entered disabled state [ 12.380582] veth1: left allmulticast mode [ 12.380652] veth1: left promiscuous mode [ 12.380716] br0: port 1(veth1) entered disabled state