[ 17.352678][ T282] br0: port 1(veth1) entered blocking state
[ 17.353278][ T282] br0: port 1(veth1) entered disabled state
[ 17.354029][ T282] veth1: entered allmulticast mode
[ 17.357469][ T282] veth1: entered promiscuous mode
[ 17.369316][ T282] ip (282) used greatest stack depth: 24240 bytes left
[ 17.593159][ T46] br0: port 1(veth1) entered blocking state
[ 17.593748][ T46] br0: port 1(veth1) entered forwarding state
[ 24.605085][ T325] br0: port 1(veth1) entered disabled state
[ 24.704484][ T326] veth1: left allmulticast mode
[ 24.704866][ T326] veth1: left promiscuous mode
[ 24.705373][ T326] br0: port 1(veth1) entered disabled state
[ 24.744517][ T326] ==================================================================
[ 24.744822][ T326] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 24.745114][ T326] Read of size 1 at addr ffff88801075a6ac by task ip/326
[ 24.745326][ T326]
[ 24.745427][ T326] CPU: 2 UID: 0 PID: 326 Comm: ip Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 24.745436][ T326] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 24.745440][ T326] Call Trace:
[ 24.745444][ T326]
[ 24.745446][ T326] dump_stack_lvl+0x82/0xc0
[ 24.745452][ T326] print_address_description.constprop.0+0x2c/0x3a0
[ 24.745470][ T326] ? kobject_put+0xbb/0xd0
[ 24.745474][ T326] print_report+0xb4/0x270
[ 24.745477][ T326] ? kobject_put+0xbb/0xd0
[ 24.745480][ T326] ? kasan_addr_to_slab+0x21/0x70
[ 24.745483][ T326] ? kobject_put+0xbb/0xd0
[ 24.745488][ T326] kasan_report+0xca/0x100
[ 24.745491][ T326] ? kobject_put+0xbb/0xd0
[ 24.745497][ T326] kobject_put+0xbb/0xd0
[ 24.745500][ T326] netdev_run_todo+0x5f0/0xc60
[ 24.745512][ T326] ? dev_ingress_queue_create+0x190/0x190
[ 24.745516][ T326] ? generic_xdp_install+0x410/0x410
[ 24.745518][ T326] ? kernfs_put.part.0+0x12d/0x480
[ 24.745533][ T326] ? unregister_netdevice_many+0x20/0x20
[ 24.745538][ T326] ? br_dev_delete+0x115/0x1a0 [bridge]
[ 24.745574][ T326] rtnl_dellink+0x350/0xa30
[ 24.745580][ T326] ? valid_bridge_getlink_req.constprop.0+0x640/0x640
[ 24.745599][ T326] ? find_held_lock+0x2b/0x80
[ 24.745613][ T326] ? __lock_acquire+0x449/0x7e0
[ 24.745619][ T326] ? find_held_lock+0x2b/0x80
[ 24.745622][ T326] ? rtnetlink_rcv_msg+0x6e6/0xc00
[ 24.745625][ T326] ? __lock_release+0x5d/0x170
[ 24.745629][ T326] ? valid_bridge_getlink_req.constprop.0+0x640/0x640
[ 24.745633][ T326] rtnetlink_rcv_msg+0x709/0xc00
[ 24.745636][ T326] ? rtnl_port_fill+0x850/0x850
[ 24.745639][ T326] ? __lock_acquire+0x449/0x7e0
[ 24.745646][ T326] netlink_rcv_skb+0x121/0x340
[ 24.745652][ T326] ? rtnl_port_fill+0x850/0x850
[ 24.745657][ T326] ? netlink_ack+0xdd0/0xdd0
[ 24.745663][ T326] ? netlink_deliver_tap+0x13e/0x340
[ 24.745666][ T326] ? netlink_deliver_tap+0xc3/0x340
[ 24.745670][ T326] netlink_unicast+0x4aa/0x780
[ 24.745674][ T326] ? netlink_attachskb+0x810/0x810
[ 24.745677][ T326] ? __lock_acquire+0x449/0x7e0
[ 24.745683][ T326] netlink_sendmsg+0x714/0xbd0
[ 24.745687][ T326] ? netlink_unicast+0x780/0x780
[ 24.745690][ T326] ? __import_iovec+0x230/0x3b0
[ 24.745701][ T326] ? netlink_unicast+0x780/0x780
[ 24.745705][ T326] ____sys_sendmsg+0x3dd/0x890
[ 24.745715][ T326] ? get_timestamp.constprop.0+0x380/0x380
[ 24.745718][ T326] ? __copy_msghdr+0x3c0/0x3c0
[ 24.745726][ T326] ___sys_sendmsg+0xed/0x170
[ 24.745729][ T326] ? kasan_record_aux_stack+0x8c/0xa0
[ 24.745732][ T326] ? __call_rcu_common.constprop.0+0xa8/0x630
[ 24.745746][ T326] ? copy_msghdr_from_user+0x110/0x110
[ 24.745751][ T326] ? find_held_lock+0x2b/0x80
[ 24.745755][ T326] ? __lock_acquire+0x449/0x7e0
[ 24.745761][ T326] ? find_held_lock+0x2b/0x80
[ 24.745764][ T326] ? __virt_addr_valid+0x22a/0x450
[ 24.745779][ T326] ? __lock_release+0x5d/0x170
[ 24.745786][ T326] __sys_sendmsg+0x10b/0x1a0
[ 24.745789][ T326] ? __call_rcu_common.constprop.0+0x318/0x630
[ 24.745793][ T326] ? __sys_sendmsg_sock+0x20/0x20
[ 24.745800][ T326] ? rcu_is_watching+0x12/0xb0
[ 24.745804][ T326] do_syscall_64+0xc1/0xfd0
[ 24.745811][ T326] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 24.745819][ T326] RIP: 0033:0x7f85d89b61d7
[ 24.745823][ T326] 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
[ 24.745826][ T326] RSP: 002b:00007ffda4f237f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 24.745833][ T326] RAX: ffffffffffffffda RBX: 00007ffda4f23f20 RCX: 00007f85d89b61d7
[ 24.745836][ T326] RDX: 0000000000000000 RSI: 00007ffda4f23860 RDI: 0000000000000005
[ 24.745837][ T326] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[ 24.745839][ T326] R10: 00007f85d88b2f60 R11: 0000000000000246 R12: 0000000000000002
[ 24.745841][ T326] R13: 00000000690dfb43 R14: 0000000000499600 R15: 0000000000000000
[ 24.745848][ T326]
[ 24.745849][ T326]
[ 24.758978][ T326] Allocated by task 280:
[ 24.759216][ T326] kasan_save_stack+0x24/0x40
[ 24.759409][ T326] kasan_save_track+0x14/0x30
[ 24.759585][ T326] __kasan_kmalloc+0x7b/0x90
[ 24.759757][ T326] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 24.759932][ T326] alloc_netdev_mqs+0x7d/0x1370
[ 24.760204][ T326] rtnl_create_link+0xa9e/0xe20
[ 24.760365][ T326] rtnl_newlink_create+0x203/0x770
[ 24.760543][ T326] __rtnl_newlink+0x231/0xa30
[ 24.760714][ T326] rtnl_newlink+0x693/0xa60
[ 24.760881][ T326] rtnetlink_rcv_msg+0x709/0xc00
[ 24.761158][ T326] netlink_rcv_skb+0x121/0x340
[ 24.761338][ T326] netlink_unicast+0x4aa/0x780
[ 24.761511][ T326] netlink_sendmsg+0x714/0xbd0
[ 24.761689][ T326] ____sys_sendmsg+0x3dd/0x890
[ 24.761967][ T326] ___sys_sendmsg+0xed/0x170
[ 24.762147][ T326] __sys_sendmsg+0x10b/0x1a0
[ 24.762329][ T326] do_syscall_64+0xc1/0xfd0
[ 24.762611][ T326] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 24.762839][ T326]
[ 24.762930][ T326] Freed by task 326:
[ 24.763062][ T326] kasan_save_stack+0x24/0x40
[ 24.763247][ T326] kasan_save_track+0x14/0x30
[ 24.763421][ T326] __kasan_save_free_info+0x3b/0x60
[ 24.763601][ T326] __kasan_slab_free+0x3f/0x60
[ 24.763769][ T326] kfree+0x21d/0x540
[ 24.763995][ T326] device_release+0x9c/0x210
[ 24.764182][ T326] kobject_cleanup+0xfe/0x360
[ 24.764359][ T326] netdev_run_todo+0x81f/0xc60
[ 24.764529][ T326] rtnl_dellink+0x350/0xa30
[ 24.764725][ T326] rtnetlink_rcv_msg+0x709/0xc00
[ 24.764894][ T326] netlink_rcv_skb+0x121/0x340
[ 24.765165][ T326] netlink_unicast+0x4aa/0x780
[ 24.765344][ T326] netlink_sendmsg+0x714/0xbd0
[ 24.765519][ T326] ____sys_sendmsg+0x3dd/0x890
[ 24.765785][ T326] ___sys_sendmsg+0xed/0x170
[ 24.765957][ T326] __sys_sendmsg+0x10b/0x1a0
[ 24.766122][ T326] do_syscall_64+0xc1/0xfd0
[ 24.766385][ T326] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 24.766696][ T326]
[ 24.766787][ T326] Last potentially related work creation:
[ 24.766972][ T326] kasan_save_stack+0x24/0x40
[ 24.767147][ T326] kasan_record_aux_stack+0x8c/0xa0
[ 24.767423][ T326] insert_work+0x34/0x230
[ 24.767669][ T326] __queue_work+0x5fd/0xab0
[ 24.767834][ T326] queue_work_on+0x84/0x90
[ 24.768018][ T326] br_multicast_dev_del+0xeb/0x240 [bridge]
[ 24.768355][ T326] br_dev_uninit+0x19/0x40 [bridge]
[ 24.768549][ T326] unregister_netdevice_many_notify+0xa80/0x1b30
[ 24.768767][ T326] rtnl_dellink+0x344/0xa30
[ 24.768932][ T326] rtnetlink_rcv_msg+0x709/0xc00
[ 24.769094][ T326] netlink_rcv_skb+0x121/0x340
[ 24.769262][ T326] netlink_unicast+0x4aa/0x780
[ 24.769446][ T326] netlink_sendmsg+0x714/0xbd0
[ 24.769621][ T326] ____sys_sendmsg+0x3dd/0x890
[ 24.769794][ T326] ___sys_sendmsg+0xed/0x170
[ 24.769975][ T326] __sys_sendmsg+0x10b/0x1a0
[ 24.770143][ T326] do_syscall_64+0xc1/0xfd0
[ 24.770419][ T326] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 24.770622][ T326]
[ 24.770705][ T326] Second to last potentially related work creation:
[ 24.771018][ T326] kasan_save_stack+0x24/0x40
[ 24.771207][ T326] kasan_record_aux_stack+0x8c/0xa0
[ 24.771384][ T326] insert_work+0x34/0x230
[ 24.771525][ T326] __queue_work+0x5fd/0xab0
[ 24.771688][ T326] queue_work_on+0x84/0x90
[ 24.771852][ T326] br_multicast_del_mdb_entry+0x95d/0xfe0 [bridge]
[ 24.772299][ T326] br_multicast_dev_del+0xeb/0x240 [bridge]
[ 24.772547][ T326] br_dev_uninit+0x19/0x40 [bridge]
[ 24.772752][ T326] unregister_netdevice_many_notify+0xa80/0x1b30
[ 24.773083][ T326] rtnl_dellink+0x344/0xa30
[ 24.773256][ T326] rtnetlink_rcv_msg+0x709/0xc00
[ 24.773420][ T326] netlink_rcv_skb+0x121/0x340
[ 24.773604][ T326] netlink_unicast+0x4aa/0x780
[ 24.773773][ T326] netlink_sendmsg+0x714/0xbd0
[ 24.774047][ T326] ____sys_sendmsg+0x3dd/0x890
[ 24.774226][ T326] ___sys_sendmsg+0xed/0x170
[ 24.774403][ T326] __sys_sendmsg+0x10b/0x1a0
[ 24.774683][ T326] do_syscall_64+0xc1/0xfd0
[ 24.774863][ T326] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 24.775066][ T326]
[ 24.775157][ T326] The buggy address belongs to the object at ffff88801075a000
[ 24.775157][ T326] which belongs to the cache kmalloc-8k of size 8192
[ 24.775643][ T326] The buggy address is located 1708 bytes inside of
[ 24.775643][ T326] freed 8192-byte region [ffff88801075a000, ffff88801075c000)
[ 24.776170][ T326]
[ 24.776266][ T326] The buggy address belongs to the physical page:
[ 24.776490][ T326] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10758
[ 24.776786][ T326] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 24.777160][ T326] flags: 0x80000000000040(head|node=0|zone=1)
[ 24.777390][ T326] page_type: f5(slab)
[ 24.777523][ T326] raw: 0080000000000040 ffff8880010438c0 ffffea00001c3c10 ffff888001041228
[ 24.777925][ T326] raw: 0000000000000000 0000000000010001 00000000f5000000 0000000000000000
[ 24.778247][ T326] head: 0080000000000040 ffff8880010438c0 ffffea00001c3c10 ffff888001041228
[ 24.778549][ T326] head: 0000000000000000 0000000000010001 00000000f5000000 0000000000000000
[ 24.778846][ T326] head: 0080000000000003 ffffea000041d601 00000000ffffffff 00000000ffffffff
[ 24.779142][ T326] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 24.779535][ T326] page dumped because: kasan: bad access detected
[ 24.779742][ T326]
[ 24.779828][ T326] Memory state around the buggy address:
[ 24.780086][ T326] ffff88801075a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 24.780329][ T326] ffff88801075a600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 24.780563][ T326] >ffff88801075a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 24.780897][ T326] ^
[ 24.781059][ T326] ffff88801075a700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 24.781303][ T326] ffff88801075a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 24.781636][ T326] ==================================================================
[ 24.781979][ T326] Disabling lock debugging due to kernel taint
[ 24.782218][ T326] ------------[ cut here ]------------
[ 24.782405][ T326] refcount_t: underflow; use-after-free.
[ 24.782784][ T326] WARNING: CPU: 2 PID: 326 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 24.783097][ T326] Modules linked in: bridge stp llc vrf veth
[ 24.783339][ T326] CPU: 2 UID: 0 PID: 326 Comm: ip Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 24.784305][ T326] Tainted: [B]=BAD_PAGE
[ 24.784559][ T326] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 24.784785][ T326] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 24.785021][ T326] Code: 7d 93 02 80 fb 01 0f 87 bb 99 d9 fe 83 e3 01 0f 85 51 ff ff ff c6 05 a8 7d 93 02 01 90 48 c7 c7 60 8d 85 84 e8 32 bf 18 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 b0 63 a1 ff e9 ba fe ff ff
[ 24.785630][ T326] RSP: 0018:ffffc900007c71f0 EFLAGS: 00010286
[ 24.785865][ T326] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 24.786132][ T326] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 24.786403][ T326] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff0a3e134
[ 24.786678][ T326] R10: 0000000000000003 R11: ffffc900007c6d80 R12: 0000000000000001
[ 24.786948][ T326] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 24.787214][ T326] FS: 00007f85d87e8800(0000) GS:ffff8880afcf2000(0000) knlGS:0000000000000000
[ 24.787535][ T326] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 24.787768][ T326] CR2: 00000000004e68c8 CR3: 0000000011501002 CR4: 0000000000772ef0
[ 24.788042][ T326] PKRU: 55555554
[ 24.788193][ T326] Call Trace:
[ 24.788346][ T326]
[ 24.788465][ T326] netdev_run_todo+0x5f0/0xc60
[ 24.788655][ T326] ? dev_ingress_queue_create+0x190/0x190
[ 24.788850][ T326] ? generic_xdp_install+0x410/0x410
[ 24.789030][ T326] ? kernfs_put.part.0+0x12d/0x480
[ 24.789215][ T326] ? unregister_netdevice_many+0x20/0x20
[ 24.789415][ T326] ? br_dev_delete+0x115/0x1a0 [bridge]
[ 24.789643][ T326] rtnl_dellink+0x350/0xa30
[ 24.789924][ T326] ? valid_bridge_getlink_req.constprop.0+0x640/0x640
[ 24.790157][ T326] ? find_held_lock+0x2b/0x80
[ 24.790347][ T326] ? __lock_acquire+0x449/0x7e0
[ 24.790641][ T326] ? find_held_lock+0x2b/0x80
[ 24.790828][ T326] ? rtnetlink_rcv_msg+0x6e6/0xc00
[ 24.791011][ T326] ? __lock_release+0x5d/0x170
[ 24.791191][ T326] ? valid_bridge_getlink_req.constprop.0+0x640/0x640
[ 24.791419][ T326] rtnetlink_rcv_msg+0x709/0xc00
[ 24.791613][ T326] ? rtnl_port_fill+0x850/0x850
[ 24.791793][ T326] ? __lock_acquire+0x449/0x7e0
[ 24.791979][ T326] netlink_rcv_skb+0x121/0x340
[ 24.792186][ T326] ? rtnl_port_fill+0x850/0x850
[ 24.792376][ T326] ? netlink_ack+0xdd0/0xdd0
[ 24.792586][ T326] ? netlink_deliver_tap+0x13e/0x340
[ 24.792775][ T326] ? netlink_deliver_tap+0xc3/0x340
[ 24.792961][ T326] netlink_unicast+0x4aa/0x780
[ 24.793145][ T326] ? netlink_attachskb+0x810/0x810
[ 24.793331][ T326] ? __lock_acquire+0x449/0x7e0
[ 24.793523][ T326] netlink_sendmsg+0x714/0xbd0
[ 24.793806][ T326] ? netlink_unicast+0x780/0x780
[ 24.793992][ T326] ? __import_iovec+0x230/0x3b0
[ 24.794182][ T326] ? netlink_unicast+0x780/0x780
[ 24.794370][ T326] ____sys_sendmsg+0x3dd/0x890
[ 24.794653][ T326] ? get_timestamp.constprop.0+0x380/0x380
[ 24.794875][ T326] ? __copy_msghdr+0x3c0/0x3c0
[ 24.795057][ T326] ___sys_sendmsg+0xed/0x170
[ 24.795306][ T326] ? kasan_record_aux_stack+0x8c/0xa0
[ 24.795595][ T326] ? __call_rcu_common.constprop.0+0xa8/0x630
[ 24.795824][ T326] ? copy_msghdr_from_user+0x110/0x110
[ 24.796009][ T326] ? find_held_lock+0x2b/0x80
[ 24.796190][ T326] ? __lock_acquire+0x449/0x7e0
[ 24.796474][ T326] ? find_held_lock+0x2b/0x80
[ 24.796657][ T326] ? __virt_addr_valid+0x22a/0x450
[ 24.796844][ T326] ? __lock_release+0x5d/0x170
[ 24.797026][ T326] __sys_sendmsg+0x10b/0x1a0
[ 24.797305][ T326] ? __call_rcu_common.constprop.0+0x318/0x630
[ 24.797539][ T326] ? __sys_sendmsg_sock+0x20/0x20
[ 24.797732][ T326] ? rcu_is_watching+0x12/0xb0
[ 24.797917][ T326] do_syscall_64+0xc1/0xfd0
[ 24.798195][ T326] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 24.798418][ T326] RIP: 0033:0x7f85d89b61d7
[ 24.798620][ T326] 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
[ 24.799324][ T326] RSP: 002b:00007ffda4f237f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 24.799712][ T326] RAX: ffffffffffffffda RBX: 00007ffda4f23f20 RCX: 00007f85d89b61d7
[ 24.799981][ T326] RDX: 0000000000000000 RSI: 00007ffda4f23860 RDI: 0000000000000005
[ 24.800244][ T326] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[ 24.800618][ T326] R10: 00007f85d88b2f60 R11: 0000000000000246 R12: 0000000000000002
[ 24.800891][ T326] R13: 00000000690dfb43 R14: 0000000000499600 R15: 0000000000000000
[ 24.801157][ T326]
[ 24.801395][ T326] irq event stamp: 44189
[ 24.801547][ T326] hardirqs last enabled at (44189): [] __schedule+0x13c7/0x1b10
[ 24.801877][ T326] hardirqs last disabled at (44188): [] __schedule+0x94a/0x1b10
[ 24.802291][ T326] softirqs last enabled at (44066): [] handle_softirqs+0x352/0x610
[ 24.802617][ T326] softirqs last disabled at (44059): [] irq_exit_rcu+0xab/0x100
[ 24.803012][ T326] ---[ end trace 0000000000000000 ]---
[ 24.808084][ T326] ip (326) used greatest stack depth: 24232 bytes left