[ 49.225191][ T716] eth3: renamed from tmp [ 50.266680][ T724] eth2: renamed from tmp [ 51.798656][ T734] eth0: renamed from tmp [ 52.231365][ T737] br0: port 1(eth0) entered blocking state [ 52.231895][ T737] br0: port 1(eth0) entered disabled state [ 52.232149][ T737] eth0: entered allmulticast mode [ 52.233368][ T737] eth0: entered promiscuous mode [ 52.235053][ T737] br0: port 1(eth0) entered blocking state [ 52.235350][ T737] br0: port 1(eth0) entered forwarding state [ 52.863630][ T741] eth1: renamed from tmp [ 53.309358][ T744] br0: port 2(eth1) entered blocking state [ 53.309711][ T744] br0: port 2(eth1) entered disabled state [ 53.309946][ T744] eth1: entered allmulticast mode [ 53.311149][ T744] eth1: entered promiscuous mode [ 53.312253][ T744] br0: port 2(eth1) entered blocking state [ 53.312490][ T744] br0: port 2(eth1) entered forwarding state [ 57.884303][ T11] br0: port 1(eth0) entered disabled state [ 58.041552][ T11] eth0 (unregistering): left allmulticast mode [ 58.041874][ T11] eth0 (unregistering): left promiscuous mode [ 58.042078][ T11] br0: port 1(eth0) entered disabled state [ 58.115559][ T11] ================================================================== [ 58.115860][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 58.116055][ T11] Read of size 8 at addr ffff8880089e00f8 by task kworker/u16:0/11 [ 58.116240][ T11] [ 58.116312][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 58.116517][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 58.116683][ T11] Workqueue: netns cleanup_net [ 58.116818][ T11] Call Trace: [ 58.116918][ T11] [ 58.116988][ T11] dump_stack_lvl+0x82/0xd0 [ 58.117122][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 58.117284][ T11] ? cleanup_net+0xa5d/0xb90 [ 58.117414][ T11] print_report+0xb4/0x270 [ 58.117542][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 58.117670][ T11] kasan_report+0xbd/0xf0 [ 58.117779][ T11] ? cleanup_net+0xa5d/0xb90 [ 58.117909][ T11] cleanup_net+0xa5d/0xb90 [ 58.118036][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 58.118165][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 58.118289][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 58.118424][ T11] ? lock_acquire+0x32/0xc0 [ 58.118551][ T11] ? process_one_work+0xe0b/0x16d0 [ 58.118683][ T11] process_one_work+0xe55/0x16d0 [ 58.118812][ T11] ? __pfx___lock_release+0x10/0x10 [ 58.118940][ T11] ? __pfx_process_one_work+0x10/0x10 [ 58.119067][ T11] ? assign_work+0x16c/0x240 [ 58.119197][ T11] worker_thread+0x58c/0xce0 [ 58.119327][ T11] ? __pfx_worker_thread+0x10/0x10 [ 58.119456][ T11] kthread+0x28a/0x350 [ 58.119555][ T11] ? __pfx_kthread+0x10/0x10 [ 58.119686][ T11] ret_from_fork+0x31/0x70 [ 58.119814][ T11] ? __pfx_kthread+0x10/0x10 [ 58.119939][ T11] ret_from_fork_asm+0x1a/0x30 [ 58.120071][ T11] [ 58.120166][ T11] [ 58.120231][ T11] Allocated by task 258: [ 58.120326][ T11] kasan_save_stack+0x24/0x50 [ 58.120457][ T11] kasan_save_track+0x14/0x30 [ 58.120585][ T11] __kasan_slab_alloc+0x59/0x70 [ 58.120709][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 58.120835][ T11] copy_net_ns+0xc6/0x540 [ 58.120931][ T11] create_new_namespaces+0x35f/0x920 [ 58.121063][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 58.121192][ T11] ksys_unshare+0x2c4/0x6e0 [ 58.121319][ T11] __x64_sys_unshare+0x31/0x40 [ 58.121444][ T11] do_syscall_64+0xc1/0x1d0 [ 58.121576][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 58.121737][ T11] [ 58.121802][ T11] Freed by task 11: [ 58.121895][ T11] kasan_save_stack+0x24/0x50 [ 58.122027][ T11] kasan_save_track+0x14/0x30 [ 58.122153][ T11] kasan_save_free_info+0x3b/0x60 [ 58.122285][ T11] __kasan_slab_free+0x38/0x50 [ 58.122411][ T11] kmem_cache_free+0xf8/0x330 [ 58.122537][ T11] cleanup_net+0x5a8/0xb90 [ 58.122665][ T11] process_one_work+0xe55/0x16d0 [ 58.122789][ T11] worker_thread+0x58c/0xce0 [ 58.122912][ T11] kthread+0x28a/0x350 [ 58.123008][ T11] ret_from_fork+0x31/0x70 [ 58.123135][ T11] ret_from_fork_asm+0x1a/0x30 [ 58.123259][ T11] [ 58.123324][ T11] Last potentially related work creation: [ 58.123450][ T11] kasan_save_stack+0x24/0x50 [ 58.123581][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 58.123707][ T11] insert_work+0x34/0x230 [ 58.123808][ T11] __queue_work+0x5fd/0xa40 [ 58.123941][ T11] queue_delayed_work_on+0x8c/0xa0 [ 58.124068][ T11] __inet_insert_ifa+0x751/0xb10 [ 58.124199][ T11] inetdev_event+0xb18/0xcf0 [ 58.124325][ T11] notifier_call_chain+0xcd/0x150 [ 58.124452][ T11] __dev_notify_flags+0xe6/0x250 [ 58.124581][ T11] dev_change_flags+0xec/0x160 [ 58.124705][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 58.124834][ T11] rtnl_newlink+0x6de/0xa80 [ 58.124960][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 58.125087][ T11] netlink_rcv_skb+0x130/0x360 [ 58.125215][ T11] netlink_unicast+0x44b/0x710 [ 58.125344][ T11] netlink_sendmsg+0x723/0xbe0 [ 58.125475][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 58.125608][ T11] ___sys_sendmsg+0xee/0x170 [ 58.125734][ T11] __sys_sendmsg+0x109/0x1a0 [ 58.125862][ T11] do_syscall_64+0xc1/0x1d0 [ 58.125990][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 58.126152][ T11] [ 58.126217][ T11] The buggy address belongs to the object at ffff8880089e0040 [ 58.126217][ T11] which belongs to the cache net_namespace of size 6528 [ 58.126566][ T11] The buggy address is located 184 bytes inside of [ 58.126566][ T11] freed 6528-byte region [ffff8880089e0040, ffff8880089e19c0) [ 58.126864][ T11] [ 58.126928][ T11] The buggy address belongs to the physical page: [ 58.127082][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x89e0 [ 58.127306][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 58.127494][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 58.127654][ T11] page_type: f5(slab) [ 58.127823][ T11] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 58.128048][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 58.128271][ T11] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 58.128562][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 58.128779][ T11] head: 0080000000000003 ffffea0000227801 ffffffffffffffff 0000000000000000 [ 58.129064][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 58.129281][ T11] page dumped because: kasan: bad access detected [ 58.129435][ T11] [ 58.129498][ T11] Memory state around the buggy address: [ 58.129617][ T11] ffff8880089dff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 58.129796][ T11] ffff8880089e0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 58.130038][ T11] >ffff8880089e0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.130217][ T11] ^ [ 58.130397][ T11] ffff8880089e0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.130573][ T11] ffff8880089e0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.130751][ T11] ================================================================== [ 58.130981][ T11] Disabling lock debugging due to kernel taint [ 58.415292][ T11] eth1: left allmulticast mode [ 58.415514][ T11] eth1: left promiscuous mode [ 58.415787][ T11] br0: port 2(eth1) entered disabled state [ 62.104218][ T820] eth1: renamed from tmp [ 63.014119][ T829] eth2: renamed from tmp