[ 2.260650] ip (248) used greatest stack depth: 12296 bytes left [ 2.464559] ip (274) used greatest stack depth: 12200 bytes left [ 2.885214] gre: GRE over IPv4 demultiplexer driver [ 2.887143] ip_gre: GRE over IPv4 tunneling driver [ 3.122351] 8021q: 802.1Q VLAN Support v1.8 [ 3.539572] GACT probability NOT on [ 3.541134] tc (373) used greatest stack depth: 11840 bytes left [ 18.447642] ------------[ cut here ]------------ [ 18.447765] refcount_t: underflow; use-after-free. [ 18.447851] WARNING: CPU: 3 PID: 565 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 18.447943] Modules linked in: act_gact cls_flower sch_ingress 8021q ip_gre gre vrf veth [ 18.448032] CPU: 3 UID: 0 PID: 565 Comm: ip Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 18.448130] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 18.448197] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 18.448256] Code: 9b 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 9b 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 [ 18.448439] RSP: 0018:ffffb3e580a77730 EFLAGS: 00010282 [ 18.448488] RAX: 0000000000000000 RBX: ffffb3e580a77740 RCX: 00000000ffffdfff [ 18.448566] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 18.448650] RBP: ffffb3e580a77248 R08: ffffffff9c356a28 R09: 00000000ffffdfff [ 18.448729] R10: ffffffff9c276a40 R11: ffffffff9c326a40 R12: dead000000000122 [ 18.448811] R13: 00000000fffbb3a9 R14: 0000000000000001 R15: ffffa06e447a1000 [ 18.448893] FS: 00007f84531a1800(0000) GS:ffffa06ee2359000(0000) knlGS:0000000000000000 [ 18.448973] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 18.449047] CR2: 00000000004e7458 CR3: 0000000003177003 CR4: 0000000000772ef0 [ 18.449128] PKRU: 55555554 [ 18.449155] Call Trace: [ 18.449185] [ 18.449218] netdev_run_todo+0x21a/0x550 [ 18.449273] rtnl_dellink+0x15b/0x350 [ 18.449329] ? virtio_fs_enqueue_req+0x352/0x570 [ 18.449394] ? netdev_run_todo+0x63/0x550 [ 18.449435] ? rtnl_bridge_getlink+0x1a0/0x1a0 [ 18.449499] rtnetlink_rcv_msg+0x358/0x400 [ 18.449548] ? get_page_from_freelist+0x15b4/0x1770 [ 18.449607] ? rtnl_calcit.isra.0+0x110/0x110 [ 18.449719] netlink_rcv_skb+0x57/0x100 [ 18.449767] netlink_unicast+0x252/0x380 [ 18.449804] ? __alloc_skb+0xdb/0x190 [ 18.449852] netlink_sendmsg+0x1be/0x3e0 [ 18.449891] ____sys_sendmsg+0x132/0x260 [ 18.449939] ? copy_msghdr_from_user+0x6c/0xa0 [ 18.449999] ___sys_sendmsg+0x87/0xd0 [ 18.450038] ? do_wp_page+0x369/0xe90 [ 18.450092] ? nfulnl_rcv_nl_event+0x36/0xa0 [ 18.450151] ? fsnotify_grab_connector+0x48/0x80 [ 18.450213] ? fsnotify_destroy_marks+0x29/0x150 [ 18.450265] __sys_sendmsg+0x71/0xd0 [ 18.450307] do_syscall_64+0xa4/0xfd0 [ 18.450351] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 18.450411] RIP: 0033:0x7f845336f1d7 [ 18.450451] 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 [ 18.450646] RSP: 002b:00007ffcba6b59e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 18.450733] RAX: ffffffffffffffda RBX: 00007ffcba6b6110 RCX: 00007f845336f1d7 [ 18.450813] RDX: 0000000000000000 RSI: 00007ffcba6b5a50 RDI: 0000000000000005 [ 18.450891] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 18.450968] R10: 00007f845326bf60 R11: 0000000000000246 R12: 0000000000000002 [ 18.451050] R13: 00000000690de7a0 R14: 0000000000499600 R15: 0000000000000000 [ 18.451130] [ 18.451154] ---[ end trace 0000000000000000 ]--- [ 18.451699] ip (565) used greatest stack depth: 11744 bytes left