[ 14.672062][ T299] eth3: renamed from tmp [ 15.678246][ T306] eth2: renamed from tmp [ 17.133051][ T316] eth0: renamed from tmp [ 17.553470][ T319] br0: port 1(eth0) entered blocking state [ 17.553943][ T319] br0: port 1(eth0) entered disabled state [ 17.554194][ T319] eth0: entered allmulticast mode [ 17.555541][ T319] eth0: entered promiscuous mode [ 17.557039][ T319] br0: port 1(eth0) entered blocking state [ 17.557365][ T319] br0: port 1(eth0) entered forwarding state [ 17.565153][ T319] ip (319) used greatest stack depth: 24288 bytes left [ 18.140148][ T323] eth1: renamed from tmp [ 18.572595][ T326] br0: port 2(eth1) entered blocking state [ 18.572905][ T326] br0: port 2(eth1) entered disabled state [ 18.573136][ T326] eth1: entered allmulticast mode [ 18.575462][ T326] eth1: entered promiscuous mode [ 18.576364][ T326] br0: port 2(eth1) entered blocking state [ 18.576584][ T326] br0: port 2(eth1) entered forwarding state [ 23.186153][ T67] br0: port 1(eth0) entered disabled state [ 23.253882][ T67] eth0 (unregistering): left allmulticast mode [ 23.254169][ T67] eth0 (unregistering): left promiscuous mode [ 23.254403][ T67] br0: port 1(eth0) entered disabled state [ 23.632796][ T67] ================================================================== [ 23.633069][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 23.633275][ T67] Read of size 8 at addr ffff8880052480f8 by task kworker/u16:1/67 [ 23.633453][ T67] [ 23.633517][ T67] CPU: 2 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 23.633712][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 23.633868][ T67] Workqueue: netns cleanup_net [ 23.634003][ T67] Call Trace: [ 23.634102][ T67] [ 23.634177][ T67] dump_stack_lvl+0x82/0xd0 [ 23.634313][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 23.634478][ T67] ? cleanup_net+0xa5d/0xb90 [ 23.634617][ T67] print_report+0xb4/0x270 [ 23.634746][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 23.634874][ T67] kasan_report+0xbd/0xf0 [ 23.634972][ T67] ? cleanup_net+0xa5d/0xb90 [ 23.635105][ T67] cleanup_net+0xa5d/0xb90 [ 23.635234][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 23.635362][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 23.635495][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 23.635631][ T67] ? lock_acquire+0x32/0xc0 [ 23.635766][ T67] ? process_one_work+0xe0b/0x16d0 [ 23.635896][ T67] process_one_work+0xe55/0x16d0 [ 23.636026][ T67] ? __pfx___lock_release+0x10/0x10 [ 23.636158][ T67] ? __pfx_process_one_work+0x10/0x10 [ 23.636289][ T67] ? assign_work+0x16c/0x240 [ 23.636418][ T67] worker_thread+0x58c/0xce0 [ 23.636551][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 23.636719][ T67] ? __pfx_worker_thread+0x10/0x10 [ 23.636851][ T67] ? __pfx_worker_thread+0x10/0x10 [ 23.636981][ T67] kthread+0x28a/0x350 [ 23.637084][ T67] ? __pfx_kthread+0x10/0x10 [ 23.637216][ T67] ret_from_fork+0x31/0x70 [ 23.637348][ T67] ? __pfx_kthread+0x10/0x10 [ 23.637479][ T67] ret_from_fork_asm+0x1a/0x30 [ 23.637618][ T67] [ 23.637720][ T67] [ 23.637788][ T67] Allocated by task 257: [ 23.637886][ T67] kasan_save_stack+0x24/0x50 [ 23.638019][ T67] kasan_save_track+0x14/0x30 [ 23.638151][ T67] __kasan_slab_alloc+0x59/0x70 [ 23.638279][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 23.638404][ T67] copy_net_ns+0xc6/0x540 [ 23.638499][ T67] create_new_namespaces+0x35f/0x920 [ 23.638626][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 23.638754][ T67] ksys_unshare+0x2c4/0x6e0 [ 23.638877][ T67] __x64_sys_unshare+0x31/0x40 [ 23.638998][ T67] do_syscall_64+0xc1/0x1d0 [ 23.639127][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.639284][ T67] [ 23.639348][ T67] Freed by task 67: [ 23.639442][ T67] kasan_save_stack+0x24/0x50 [ 23.639569][ T67] kasan_save_track+0x14/0x30 [ 23.639694][ T67] kasan_save_free_info+0x3b/0x60 [ 23.639821][ T67] __kasan_slab_free+0x38/0x50 [ 23.639944][ T67] kmem_cache_free+0xf8/0x330 [ 23.640067][ T67] cleanup_net+0x5a8/0xb90 [ 23.640190][ T67] process_one_work+0xe55/0x16d0 [ 23.640314][ T67] worker_thread+0x58c/0xce0 [ 23.640439][ T67] kthread+0x28a/0x350 [ 23.640530][ T67] ret_from_fork+0x31/0x70 [ 23.640653][ T67] ret_from_fork_asm+0x1a/0x30 [ 23.640778][ T67] [ 23.640843][ T67] Last potentially related work creation: [ 23.640969][ T67] kasan_save_stack+0x24/0x50 [ 23.641095][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 23.641224][ T67] insert_work+0x34/0x230 [ 23.641324][ T67] __queue_work+0x5fd/0xa40 [ 23.641452][ T67] queue_delayed_work_on+0x8c/0xa0 [ 23.641580][ T67] __inet_insert_ifa+0x751/0xb10 [ 23.641709][ T67] inetdev_event+0xb18/0xcf0 [ 23.641834][ T67] notifier_call_chain+0xcd/0x150 [ 23.641966][ T67] __dev_notify_flags+0xe6/0x250 [ 23.642089][ T67] dev_change_flags+0xec/0x160 [ 23.642212][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 23.642343][ T67] rtnl_newlink+0x6de/0xa80 [ 23.642470][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 23.642596][ T67] netlink_rcv_skb+0x130/0x360 [ 23.642724][ T67] netlink_unicast+0x44b/0x710 [ 23.642851][ T67] netlink_sendmsg+0x723/0xbe0 [ 23.642977][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 23.643108][ T67] ___sys_sendmsg+0xee/0x170 [ 23.643234][ T67] __sys_sendmsg+0x109/0x1a0 [ 23.643363][ T67] do_syscall_64+0xc1/0x1d0 [ 23.643490][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.643644][ T67] [ 23.643708][ T67] The buggy address belongs to the object at ffff888005248040 [ 23.643708][ T67] which belongs to the cache net_namespace of size 6528 [ 23.644039][ T67] The buggy address is located 184 bytes inside of [ 23.644039][ T67] freed 6528-byte region [ffff888005248040, ffff8880052499c0) [ 23.644334][ T67] [ 23.644397][ T67] The buggy address belongs to the physical page: [ 23.644546][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5248 [ 23.644767][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 23.644954][ T67] flags: 0x80000000000040(head|node=0|zone=1) [ 23.645116][ T67] page_type: f5(slab) [ 23.645217][ T67] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 23.645442][ T67] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 23.645669][ T67] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 23.645887][ T67] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 23.646102][ T67] head: 0080000000000003 ffffea0000149201 ffffffffffffffff 0000000000000000 [ 23.646317][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 23.646533][ T67] page dumped because: kasan: bad access detected [ 23.646682][ T67] [ 23.646742][ T67] Memory state around the buggy address: [ 23.646861][ T67] ffff888005247f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.647037][ T67] ffff888005248000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.647276][ T67] >ffff888005248080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.647450][ T67] ^ [ 23.647680][ T67] ffff888005248100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.647923][ T67] ffff888005248180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.648103][ T67] ================================================================== [ 23.648392][ T67] Disabling lock debugging due to kernel taint [ 23.755474][ T67] eth1: left allmulticast mode [ 23.755750][ T67] eth1: left promiscuous mode [ 23.756138][ T67] br0: port 2(eth1) entered disabled state [ 27.400698][ T403] eth1: renamed from tmp [ 28.361970][ T412] eth2: renamed from tmp