[ 2.623953] tc (284) used greatest stack depth: 11840 bytes left [ 15.670859] ------------[ cut here ]------------ [ 15.670985] refcount_t: underflow; use-after-free. [ 15.671081] WARNING: CPU: 3 PID: 485 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 15.671171] Modules linked in: xt_length nft_compat nf_tables act_ct nf_flow_table nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 cls_flower sch_ingress [ 15.671279] CPU: 3 UID: 0 PID: 485 Comm: ip Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 15.671347] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.671391] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 15.671443] Code: 8f e8 e8 54 ba ff 90 0f 0b 90 90 c3 80 3d 00 e6 2b 01 00 75 89 c6 05 f7 e5 2b 01 01 90 48 c7 c7 f8 48 b5 8f e8 c5 54 ba ff 90 <0f> 0b 90 90 c3 80 3d db e5 2b 01 00 0f 85 62 ff ff ff c6 05 ce e5 [ 15.671609] RSP: 0018:ffffac85002cb730 EFLAGS: 00010282 [ 15.671656] RAX: 0000000000000000 RBX: ffffac85002cb740 RCX: 00000000ffffdfff [ 15.671722] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 15.671780] RBP: ffffac85002cb238 R08: ffffffff9035ba28 R09: 00000000ffffdfff [ 15.671837] R10: ffffffff9027ba40 R11: ffffffff9032ba40 R12: dead000000000122 [ 15.671895] R13: 00000000fffba8ca R14: 0000000000000001 R15: ffff8908c6081000 [ 15.671952] FS: 00007f277f405800(0000) GS:ffff89096e311000(0000) knlGS:0000000000000000 [ 15.672017] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 15.672078] CR2: 00000000004e55a0 CR3: 0000000008d44001 CR4: 0000000000772ef0 [ 15.672130] PKRU: 55555554 [ 15.672152] Call Trace: [ 15.672191] [ 15.672214] netdev_run_todo+0x21a/0x550 [ 15.672285] rtnl_dellink+0x15b/0x350 [ 15.672338] ? virtio_fs_enqueue_req+0x352/0x570 [ 15.672402] ? netdev_run_todo+0x63/0x550 [ 15.672441] ? rtnl_bridge_getlink+0x1a0/0x1a0 [ 15.672496] rtnetlink_rcv_msg+0x358/0x400 [ 15.672535] ? get_page_from_freelist+0x15b4/0x1770 [ 15.672599] ? rtnl_calcit.isra.0+0x110/0x110 [ 15.672659] netlink_rcv_skb+0x57/0x100 [ 15.672725] netlink_unicast+0x252/0x380 [ 15.672777] ? __alloc_skb+0xdb/0x190 [ 15.672825] netlink_sendmsg+0x1be/0x3e0 [ 15.672865] ____sys_sendmsg+0x132/0x260 [ 15.672921] ? copy_msghdr_from_user+0x6c/0xa0 [ 15.672979] ___sys_sendmsg+0x87/0xd0 [ 15.673036] ? do_wp_page+0x369/0xe90 [ 15.673090] ? ___pte_offset_map+0x1b/0xd0 [ 15.673148] ? fsnotify_grab_connector+0x48/0x80 [ 15.673209] ? fsnotify_destroy_marks+0x29/0x150 [ 15.673263] __sys_sendmsg+0x71/0xd0 [ 15.673302] do_syscall_64+0xa4/0xfd0 [ 15.673363] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 15.673431] RIP: 0033:0x7f277f5d31d7 [ 15.673481] 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 [ 15.673660] RSP: 002b:00007fffbec13248 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 15.673752] RAX: ffffffffffffffda RBX: 00007fffbec13980 RCX: 00007f277f5d31d7 [ 15.673836] RDX: 0000000000000000 RSI: 00007fffbec132b0 RDI: 0000000000000005 [ 15.673908] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078 [ 15.673987] R10: 00007f277f4cf510 R11: 0000000000000246 R12: 0000000000000001 [ 15.674065] R13: 00000000690de8fd R14: 0000000000499600 R15: 0000000000000000 [ 15.674146] [ 15.674186] ---[ end trace 0000000000000000 ]--- [ 15.680531] ip (485) used greatest stack depth: 11744 bytes left