[ 343.191997][ T2798] br1: port 1(vx100) entered blocking state [ 343.192487][ T2798] br1: port 1(vx100) entered disabled state [ 343.192819][ T2798] vx100: entered allmulticast mode [ 343.195104][ T2798] vx100: entered promiscuous mode [ 343.196022][ T2798] br1: port 1(vx100) entered blocking state [ 343.196368][ T2798] br1: port 1(vx100) entered forwarding state [ 343.365995][ T2800] br1: port 2(veth1) entered blocking state [ 343.366317][ T2800] br1: port 2(veth1) entered disabled state [ 343.366607][ T2800] veth1: entered allmulticast mode [ 343.369435][ T2800] veth1: entered promiscuous mode [ 343.482386][ T37] br1: port 2(veth1) entered blocking state [ 343.482912][ T37] br1: port 2(veth1) entered forwarding state [ 343.847235][ T2807] br2: port 1(vx200) entered blocking state [ 343.847538][ T2807] br2: port 1(vx200) entered disabled state [ 343.847822][ T2807] vx200: entered allmulticast mode [ 343.849738][ T2807] vx200: entered promiscuous mode [ 343.850828][ T2807] br2: port 1(vx200) entered blocking state [ 343.851078][ T2807] br2: port 1(vx200) entered forwarding state [ 344.183137][ T2810] br2: port 2(veth2.20) entered blocking state [ 344.183444][ T2810] br2: port 2(veth2.20) entered disabled state [ 344.183727][ T2810] veth2.20: entered allmulticast mode [ 344.185693][ T2810] veth2.20: entered promiscuous mode [ 344.286506][ T2812] veth2: entered allmulticast mode [ 344.286820][ T2812] veth2: entered promiscuous mode [ 344.288437][ T2812] br2: port 2(veth2.20) entered blocking state [ 344.288772][ T2812] br2: port 2(veth2.20) entered forwarding state [ 347.758161][ T2864] br3: port 1(w1) entered blocking state [ 347.758468][ T2864] br3: port 1(w1) entered disabled state [ 347.758710][ T2864] w1: entered allmulticast mode [ 347.760672][ T2864] w1: entered promiscuous mode [ 348.249773][ T2870] br3: port 2(vx100) entered blocking state [ 348.250083][ T2870] br3: port 2(vx100) entered disabled state [ 348.257905][ T2870] vx100: entered allmulticast mode [ 348.260291][ T2870] vx100: entered promiscuous mode [ 348.261258][ T2870] br3: port 2(vx100) entered blocking state [ 348.261523][ T2870] br3: port 2(vx100) entered forwarding state [ 348.904762][ T2802] br3: port 1(w1) entered blocking state [ 348.905032][ T2802] br3: port 1(w1) entered forwarding state [ 351.608854][ T2918] br3: port 1(w1) entered blocking state [ 351.609105][ T2918] br3: port 1(w1) entered disabled state [ 351.609687][ T2918] w1: entered allmulticast mode [ 351.612882][ T2918] w1: entered promiscuous mode [ 352.144269][ T2924] br3: port 2(vx200) entered blocking state [ 352.144578][ T2924] br3: port 2(vx200) entered disabled state [ 352.144894][ T2924] vx200: entered allmulticast mode [ 352.147037][ T2924] vx200: entered promiscuous mode [ 352.148111][ T2924] br3: port 2(vx200) entered blocking state [ 352.148464][ T2924] br3: port 2(vx200) entered forwarding state [ 352.804376][ T39] br3: port 1(w1) entered blocking state [ 352.804763][ T39] br3: port 1(w1) entered forwarding state [ 354.695068][ T2963] br3: port 3(w1.20) entered blocking state [ 354.695434][ T2963] br3: port 3(w1.20) entered disabled state [ 354.695750][ T2963] w1.20: entered allmulticast mode [ 354.698050][ T2963] w1.20: entered promiscuous mode [ 355.347259][ T2976] br3: port 3(w1.20) entered blocking state [ 355.347674][ T2976] br3: port 3(w1.20) entered forwarding state [ 365.847588][ T67] w1.20: left allmulticast mode [ 365.847944][ T67] w1.20: left promiscuous mode [ 365.848639][ T67] br3: port 3(w1.20) entered disabled state [ 365.850916][ T67] vx200: left allmulticast mode [ 365.851267][ T67] vx200: left promiscuous mode [ 365.851750][ T67] br3: port 2(vx200) entered disabled state [ 365.853587][ T67] w1: left allmulticast mode [ 365.853876][ T67] w1: left promiscuous mode [ 365.854380][ T67] br3: port 1(w1) entered disabled state [ 366.236800][ T67] ================================================================== [ 366.237140][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 366.237443][ T67] Read of size 8 at addr ffff88800bd880f8 by task kworker/u16:1/67 [ 366.237711][ T67] [ 366.237808][ T67] CPU: 1 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 366.238095][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 366.238345][ T67] Workqueue: netns cleanup_net [ 366.238555][ T67] Call Trace: [ 366.238714][ T67] [ 366.238819][ T67] dump_stack_lvl+0x82/0xd0 [ 366.239022][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 366.239281][ T67] ? cleanup_net+0x932/0xa40 [ 366.239483][ T67] print_report+0xb4/0x270 [ 366.239684][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 366.239884][ T67] kasan_report+0xbd/0xf0 [ 366.240035][ T67] ? cleanup_net+0x932/0xa40 [ 366.240239][ T67] cleanup_net+0x932/0xa40 [ 366.240462][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 366.240666][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 366.240895][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 366.241095][ T67] ? lock_acquire+0x32/0xc0 [ 366.241302][ T67] ? process_one_work+0xe0b/0x16d0 [ 366.241507][ T67] process_one_work+0xe55/0x16d0 [ 366.241735][ T67] ? __pfx___lock_release+0x10/0x10 [ 366.241945][ T67] ? __pfx_process_one_work+0x10/0x10 [ 366.242152][ T67] ? assign_work+0x16c/0x240 [ 366.242355][ T67] worker_thread+0x58c/0xce0 [ 366.242568][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 366.242831][ T67] ? __pfx_worker_thread+0x10/0x10 [ 366.243031][ T67] ? __pfx_worker_thread+0x10/0x10 [ 366.243250][ T67] kthread+0x28a/0x350 [ 366.243414][ T67] ? __pfx_kthread+0x10/0x10 [ 366.243621][ T67] ret_from_fork+0x31/0x70 [ 366.243840][ T67] ? __pfx_kthread+0x10/0x10 [ 366.244039][ T67] ret_from_fork_asm+0x1a/0x30 [ 366.244259][ T67] [ 366.244431][ T67] [ 366.244531][ T67] Allocated by task 1838: [ 366.244682][ T67] kasan_save_stack+0x24/0x50 [ 366.244933][ T67] kasan_save_track+0x14/0x30 [ 366.245149][ T67] __kasan_slab_alloc+0x59/0x70 [ 366.245373][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 366.245607][ T67] copy_net_ns+0xc6/0x340 [ 366.245792][ T67] create_new_namespaces+0x35f/0x920 [ 366.245998][ T67] unshare_nsproxy_namespaces+0x8d/0x130 [ 366.246231][ T67] ksys_unshare+0x2a9/0x660 [ 366.246446][ T67] __x64_sys_unshare+0x31/0x40 [ 366.246651][ T67] do_syscall_64+0xc1/0x1d0 [ 366.246870][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 366.247085][ T67] [ 366.247171][ T67] Freed by task 67: [ 366.247274][ T67] kasan_save_stack+0x24/0x50 [ 366.247427][ T67] kasan_save_track+0x14/0x30 [ 366.247581][ T67] kasan_save_free_info+0x3b/0x60 [ 366.247733][ T67] __kasan_slab_free+0x38/0x50 [ 366.247884][ T67] kmem_cache_free+0xf8/0x330 [ 366.248016][ T67] cleanup_net+0x5a8/0xa40 [ 366.248148][ T67] process_one_work+0xe55/0x16d0 [ 366.248281][ T67] worker_thread+0x58c/0xce0 [ 366.248427][ T67] kthread+0x28a/0x350 [ 366.248543][ T67] ret_from_fork+0x31/0x70 [ 366.248677][ T67] ret_from_fork_asm+0x1a/0x30 [ 366.248820][ T67] [ 366.248900][ T67] Last potentially related work creation: [ 366.249029][ T67] kasan_save_stack+0x24/0x50 [ 366.249184][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 366.249314][ T67] insert_work+0x34/0x230 [ 366.249412][ T67] __queue_work+0x5fd/0xa40 [ 366.249539][ T67] queue_delayed_work_on+0x8c/0xa0 [ 366.249674][ T67] __inet_insert_ifa+0x751/0xb10 [ 366.249873][ T67] inetdev_event+0xb18/0xcf0 [ 366.250071][ T67] notifier_call_chain+0xcd/0x150 [ 366.250203][ T67] __dev_notify_flags+0xe6/0x250 [ 366.250343][ T67] dev_change_flags+0xec/0x160 [ 366.250473][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 366.250610][ T67] rtnl_newlink+0x6de/0xa80 [ 366.250754][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 366.250884][ T67] netlink_rcv_skb+0x130/0x360 [ 366.251019][ T67] netlink_unicast+0x44b/0x710 [ 366.251154][ T67] netlink_sendmsg+0x723/0xbe0 [ 366.251297][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 366.251426][ T67] ___sys_sendmsg+0xee/0x170 [ 366.251562][ T67] __sys_sendmsg+0x109/0x1a0 [ 366.251699][ T67] do_syscall_64+0xc1/0x1d0 [ 366.251832][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 366.251989][ T67] [ 366.252056][ T67] The buggy address belongs to the object at ffff88800bd88040 [ 366.252056][ T67] which belongs to the cache net_namespace of size 6080 [ 366.252406][ T67] The buggy address is located 184 bytes inside of [ 366.252406][ T67] freed 6080-byte region [ffff88800bd88040, ffff88800bd89800) [ 366.252717][ T67] [ 366.252783][ T67] The buggy address belongs to the physical page: [ 366.252939][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800bd8cc00 pfn:0xbd88 [ 366.253194][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 366.253385][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 366.253547][ T67] page_type: f5(slab) [ 366.253648][ T67] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 366.253887][ T67] raw: ffff88800bd8cc00 0000000000050003 00000001f5000000 0000000000000000 [ 366.254110][ T67] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 366.254335][ T67] head: ffff88800bd8cc00 0000000000050003 00000001f5000000 0000000000000000 [ 366.254556][ T67] head: 0080000000000003 ffffea00002f6201 ffffffffffffffff 0000000000000000 [ 366.254830][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 366.255160][ T67] page dumped because: kasan: bad access detected [ 366.255318][ T67] [ 366.255382][ T67] Memory state around the buggy address: [ 366.255512][ T67] ffff88800bd87f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 366.255709][ T67] ffff88800bd88000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 366.255898][ T67] >ffff88800bd88080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 366.256080][ T67] ^ [ 366.256264][ T67] ffff88800bd88100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 366.256483][ T67] ffff88800bd88180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 366.256667][ T67] ================================================================== [ 366.257008][ T67] Disabling lock debugging due to kernel taint [ 366.317329][ T67] vx100: left allmulticast mode [ 366.317554][ T67] vx100: left promiscuous mode [ 366.317845][ T67] br3: port 2(vx100) entered disabled state [ 366.320429][ T67] w1: left allmulticast mode [ 366.320607][ T67] w1: left promiscuous mode [ 366.320894][ T67] br3: port 1(w1) entered disabled state [ 367.998500][ T3073] vx200: left allmulticast mode [ 367.998698][ T3073] vx200: left promiscuous mode [ 367.998959][ T3073] br2: port 1(vx200) entered disabled state [ 368.244392][ T3076] veth2: left allmulticast mode [ 368.244624][ T3076] veth2: left promiscuous mode [ 368.245809][ T3076] br2: port 2(veth2.20) entered disabled state [ 368.257989][ T3076] veth2.20 (unregistering): left allmulticast mode [ 368.258359][ T3076] veth2.20 (unregistering): left promiscuous mode [ 368.258569][ T3076] br2: port 2(veth2.20) entered disabled state [ 368.566335][ T3081] br1: port 2(veth1) entered disabled state [ 368.645584][ T3082] veth1: left allmulticast mode [ 368.645847][ T3082] veth1: left promiscuous mode [ 368.646145][ T3082] br1: port 2(veth1) entered disabled state [ 368.701308][ T3083] vx100: left allmulticast mode [ 368.701514][ T3083] vx100: left promiscuous mode [ 368.701811][ T3083] br1: port 1(vx100) entered disabled state