[ 2.125554] ip (248) used greatest stack depth: 12344 bytes left [ 2.665141] 8021q: 802.1Q VLAN Support v1.8 [ 2.707969] gre: GRE over IPv4 demultiplexer driver [ 2.709640] ip_gre: GRE over IPv4 tunneling driver [ 15.367265] ------------[ cut here ]------------ [ 15.367399] refcount_t: underflow; use-after-free. [ 15.367483] WARNING: CPU: 2 PID: 408 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 15.367585] Modules linked in: ip_gre gre 8021q vrf veth [ 15.367659] CPU: 2 UID: 0 PID: 408 Comm: ip Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 15.367759] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.367836] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 15.367903] 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 d1 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 [ 15.368081] RSP: 0018:ffffb452408ff730 EFLAGS: 00010282 [ 15.368151] RAX: 0000000000000000 RBX: ffffb452408ff740 RCX: 00000000ffffdfff [ 15.368253] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 15.368348] RBP: ffffb452408ff248 R08: ffffffffb3156a28 R09: 00000000ffffdfff [ 15.368445] R10: ffffffffb3076a40 R11: ffffffffb3126a40 R12: dead000000000122 [ 15.368542] R13: 00000000fffba7a2 R14: 0000000000000001 R15: ffff94abc4f98000 [ 15.368640] FS: 00007f00bd07f800(0000) GS:ffff94ac4b4d9000(0000) knlGS:0000000000000000 [ 15.368739] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 15.368824] CR2: 000055fca3df92b0 CR3: 00000000031ac004 CR4: 0000000000772ef0 [ 15.368919] PKRU: 55555554 [ 15.368952] Call Trace: [ 15.368996] [ 15.369043] netdev_run_todo+0x21a/0x550 [ 15.369116] rtnl_dellink+0x15b/0x350 [ 15.369182] ? virtio_fs_enqueue_req+0x352/0x570 [ 15.369259] ? netdev_run_todo+0x63/0x550 [ 15.369327] ? rtnl_bridge_getlink+0x1a0/0x1a0 [ 15.369401] rtnetlink_rcv_msg+0x358/0x400 [ 15.369461] ? get_page_from_freelist+0x15b4/0x1770 [ 15.369537] ? rtnl_calcit.isra.0+0x110/0x110 [ 15.369614] netlink_rcv_skb+0x57/0x100 [ 15.369679] netlink_unicast+0x252/0x380 [ 15.369738] ? __alloc_skb+0xdb/0x190 [ 15.369804] netlink_sendmsg+0x1be/0x3e0 [ 15.369865] ____sys_sendmsg+0x132/0x260 [ 15.369926] ? copy_msghdr_from_user+0x6c/0xa0 [ 15.370002] ___sys_sendmsg+0x87/0xd0 [ 15.370065] ? do_wp_page+0x369/0xe90 [ 15.370128] ? nfulnl_rcv_nl_event+0x36/0xa0 [ 15.370205] ? fsnotify_grab_connector+0x48/0x80 [ 15.370288] ? fsnotify_destroy_marks+0x29/0x150 [ 15.370358] __sys_sendmsg+0x71/0xd0 [ 15.370423] do_syscall_64+0xa4/0xfd0 [ 15.370483] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 15.370552] RIP: 0033:0x7f00bd24d1d7 [ 15.370625] 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 [ 15.370807] RSP: 002b:00007ffd4b21f4b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 15.370911] RAX: ffffffffffffffda RBX: 00007ffd4b21fbe0 RCX: 00007f00bd24d1d7 [ 15.371015] RDX: 0000000000000000 RSI: 00007ffd4b21f520 RDI: 0000000000000005 [ 15.371115] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 15.371228] R10: 00007f00bd149f60 R11: 0000000000000246 R12: 0000000000000002 [ 15.371321] R13: 00000000690de7dd R14: 0000000000499600 R15: 0000000000000000 [ 15.371418] [ 15.371473] ---[ end trace 0000000000000000 ]--- [ 15.372129] ip (408) used greatest stack depth: 11744 bytes left