[ 10.853851][ T67] ================================================================== [ 10.854077][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 10.854276][ T67] Read of size 8 at addr ffff8880134d00f8 by task kworker/u16:1/67 [ 10.854462][ T67] [ 10.854531][ T67] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 10.854728][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 10.854887][ T67] Workqueue: netns cleanup_net [ 10.855021][ T67] Call Trace: [ 10.855123][ T67] [ 10.855190][ T67] dump_stack_lvl+0x82/0xd0 [ 10.855328][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 10.855492][ T67] ? cleanup_net+0xa5d/0xb90 [ 10.855623][ T67] print_report+0xb4/0x270 [ 10.855753][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 10.855883][ T67] kasan_report+0xbd/0xf0 [ 10.855983][ T67] ? cleanup_net+0xa5d/0xb90 [ 10.856113][ T67] cleanup_net+0xa5d/0xb90 [ 10.856243][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 10.856379][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 10.856508][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 10.856640][ T67] ? lock_acquire+0x32/0xc0 [ 10.856770][ T67] ? process_one_work+0xe0b/0x16d0 [ 10.856901][ T67] process_one_work+0xe55/0x16d0 [ 10.857035][ T67] ? __pfx___lock_release+0x10/0x10 [ 10.857163][ T67] ? __pfx_process_one_work+0x10/0x10 [ 10.857294][ T67] ? assign_work+0x16c/0x240 [ 10.857424][ T67] worker_thread+0x58c/0xce0 [ 10.857551][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 10.857713][ T67] ? __pfx_worker_thread+0x10/0x10 [ 10.857841][ T67] ? __pfx_worker_thread+0x10/0x10 [ 10.857971][ T67] kthread+0x28a/0x350 [ 10.858071][ T67] ? __pfx_kthread+0x10/0x10 [ 10.858323][ T67] ret_from_fork+0x31/0x70 [ 10.858461][ T67] ? __pfx_kthread+0x10/0x10 [ 10.858591][ T67] ret_from_fork_asm+0x1a/0x30 [ 10.858723][ T67] [ 10.858823][ T67] [ 10.858889][ T67] Allocated by task 251: [ 10.858986][ T67] kasan_save_stack+0x24/0x50 [ 10.859117][ T67] kasan_save_track+0x14/0x30 [ 10.859244][ T67] __kasan_slab_alloc+0x59/0x70 [ 10.859376][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 10.859510][ T67] copy_net_ns+0xc6/0x540 [ 10.859609][ T67] create_new_namespaces+0x35f/0x920 [ 10.859742][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 10.859875][ T67] ksys_unshare+0x2c4/0x6e0 [ 10.860010][ T67] __x64_sys_unshare+0x31/0x40 [ 10.860136][ T67] do_syscall_64+0xc1/0x1d0 [ 10.860268][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 10.860432][ T67] [ 10.860497][ T67] Freed by task 67: [ 10.860596][ T67] kasan_save_stack+0x24/0x50 [ 10.860728][ T67] kasan_save_track+0x14/0x30 [ 10.860854][ T67] kasan_save_free_info+0x3b/0x60 [ 10.860984][ T67] __kasan_slab_free+0x38/0x50 [ 10.861111][ T67] kmem_cache_free+0xf8/0x330 [ 10.861239][ T67] cleanup_net+0x5a8/0xb90 [ 10.861366][ T67] process_one_work+0xe55/0x16d0 [ 10.861499][ T67] worker_thread+0x58c/0xce0 [ 10.861626][ T67] kthread+0x28a/0x350 [ 10.861724][ T67] ret_from_fork+0x31/0x70 [ 10.861851][ T67] ret_from_fork_asm+0x1a/0x30 [ 10.861981][ T67] [ 10.862050][ T67] Last potentially related work creation: [ 10.862178][ T67] kasan_save_stack+0x24/0x50 [ 10.862310][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 10.862441][ T67] insert_work+0x34/0x230 [ 10.862540][ T67] __queue_work+0x5fd/0xa40 [ 10.862671][ T67] queue_delayed_work_on+0x8c/0xa0 [ 10.862800][ T67] __inet_insert_ifa+0x751/0xb10 [ 10.862934][ T67] inetdev_event+0xb18/0xcf0 [ 10.863063][ T67] notifier_call_chain+0xcd/0x150 [ 10.863194][ T67] __dev_notify_flags+0xe6/0x250 [ 10.863326][ T67] dev_change_flags+0xec/0x160 [ 10.863457][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 10.863588][ T67] rtnl_newlink+0x6de/0xa80 [ 10.863720][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 10.863850][ T67] netlink_rcv_skb+0x130/0x360 [ 10.863986][ T67] netlink_unicast+0x44b/0x710 [ 10.864117][ T67] netlink_sendmsg+0x723/0xbe0 [ 10.864247][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 10.864378][ T67] ___sys_sendmsg+0xee/0x170 [ 10.864508][ T67] __sys_sendmsg+0x109/0x1a0 [ 10.864636][ T67] do_syscall_64+0xc1/0x1d0 [ 10.864766][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 10.864932][ T67] [ 10.865003][ T67] The buggy address belongs to the object at ffff8880134d0040 [ 10.865003][ T67] which belongs to the cache net_namespace of size 6528 [ 10.865341][ T67] The buggy address is located 184 bytes inside of [ 10.865341][ T67] freed 6528-byte region [ffff8880134d0040, ffff8880134d19c0) [ 10.865660][ T67] [ 10.865726][ T67] The buggy address belongs to the physical page: [ 10.865884][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880134d5140 pfn:0x134d0 [ 10.866144][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 10.866335][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 10.866498][ T67] page_type: f5(slab) [ 10.866601][ T67] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 10.866832][ T67] raw: ffff8880134d5140 0000000000040003 00000001f5000000 0000000000000000 [ 10.867062][ T67] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 10.867297][ T67] head: ffff8880134d5140 0000000000040003 00000001f5000000 0000000000000000 [ 10.867520][ T67] head: 0080000000000003 ffffea00004d3401 ffffffffffffffff 0000000000000000 [ 10.867741][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 10.867964][ T67] page dumped because: kasan: bad access detected [ 10.868119][ T67] [ 10.868189][ T67] Memory state around the buggy address: [ 10.868319][ T67] ffff8880134cff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.868508][ T67] ffff8880134d0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 10.868693][ T67] >ffff8880134d0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.868882][ T67] ^ [ 10.869070][ T67] ffff8880134d0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.869256][ T67] ffff8880134d0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.869436][ T67] ================================================================== [ 10.869655][ T67] Disabling lock debugging due to kernel taint