[ 10.639759][ T264] ip (264) used greatest stack depth: 23976 bytes left [ 11.893260][ T66] ================================================================== [ 11.893571][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 11.893851][ T66] Read of size 8 at addr ffff88800a9d80f8 by task kworker/u16:1/66 [ 11.894123][ T66] [ 11.894220][ T66] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 11.894508][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.894746][ T66] Workqueue: netns cleanup_net [ 11.894947][ T66] Call Trace: [ 11.895091][ T66] [ 11.895197][ T66] dump_stack_lvl+0x82/0xd0 [ 11.895395][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 11.895638][ T66] ? cleanup_net+0xa5d/0xb90 [ 11.895831][ T66] print_report+0xb4/0x270 [ 11.896015][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 11.896200][ T66] kasan_report+0xbd/0xf0 [ 11.896324][ T66] ? cleanup_net+0xa5d/0xb90 [ 11.896451][ T66] cleanup_net+0xa5d/0xb90 [ 11.896575][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.896721][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 11.896873][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 11.897017][ T66] ? lock_acquire+0x32/0xc0 [ 11.897180][ T66] ? process_one_work+0xe0b/0x16d0 [ 11.897348][ T66] process_one_work+0xe55/0x16d0 [ 11.897500][ T66] ? __pfx___lock_release+0x10/0x10 [ 11.897675][ T66] ? __pfx_process_one_work+0x10/0x10 [ 11.897824][ T66] ? assign_work+0x16c/0x240 [ 11.897990][ T66] worker_thread+0x58c/0xce0 [ 11.898113][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 11.898280][ T66] ? __pfx_worker_thread+0x10/0x10 [ 11.898405][ T66] ? __pfx_worker_thread+0x10/0x10 [ 11.898528][ T66] kthread+0x28a/0x350 [ 11.898625][ T66] ? __pfx_kthread+0x10/0x10 [ 11.898749][ T66] ret_from_fork+0x31/0x70 [ 11.898874][ T66] ? __pfx_kthread+0x10/0x10 [ 11.899001][ T66] ret_from_fork_asm+0x1a/0x30 [ 11.899128][ T66] [ 11.899242][ T66] [ 11.899305][ T66] Allocated by task 256: [ 11.899399][ T66] kasan_save_stack+0x24/0x50 [ 11.899568][ T66] kasan_save_track+0x14/0x30 [ 11.899704][ T66] __kasan_slab_alloc+0x59/0x70 [ 11.899825][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.899990][ T66] copy_net_ns+0xc6/0x540 [ 11.900086][ T66] create_new_namespaces+0x35f/0x920 [ 11.900230][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 11.900398][ T66] ksys_unshare+0x2c4/0x6e0 [ 11.900523][ T66] __x64_sys_unshare+0x31/0x40 [ 11.900646][ T66] do_syscall_64+0xc1/0x1d0 [ 11.900769][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.900923][ T66] [ 11.900990][ T66] Freed by task 66: [ 11.901091][ T66] kasan_save_stack+0x24/0x50 [ 11.901271][ T66] kasan_save_track+0x14/0x30 [ 11.901393][ T66] kasan_save_free_info+0x3b/0x60 [ 11.901516][ T66] __kasan_slab_free+0x38/0x50 [ 11.901639][ T66] kmem_cache_free+0xf8/0x330 [ 11.901761][ T66] cleanup_net+0x5a8/0xb90 [ 11.901884][ T66] process_one_work+0xe55/0x16d0 [ 11.902008][ T66] worker_thread+0x58c/0xce0 [ 11.902130][ T66] kthread+0x28a/0x350 [ 11.902232][ T66] ret_from_fork+0x31/0x70 [ 11.902355][ T66] ret_from_fork_asm+0x1a/0x30 [ 11.902476][ T66] [ 11.902538][ T66] Last potentially related work creation: [ 11.902663][ T66] kasan_save_stack+0x24/0x50 [ 11.902788][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 11.902912][ T66] insert_work+0x34/0x230 [ 11.903005][ T66] __queue_work+0x5fd/0xa40 [ 11.903129][ T66] queue_delayed_work_on+0x8c/0xa0 [ 11.903267][ T66] __inet_insert_ifa+0x751/0xb10 [ 11.903394][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 11.903519][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 11.903643][ T66] netlink_rcv_skb+0x130/0x360 [ 11.903770][ T66] netlink_unicast+0x44b/0x710 [ 11.903894][ T66] netlink_sendmsg+0x723/0xbe0 [ 11.904020][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 11.904146][ T66] ___sys_sendmsg+0xee/0x170 [ 11.904296][ T66] __sys_sendmsg+0x109/0x1a0 [ 11.904419][ T66] do_syscall_64+0xc1/0x1d0 [ 11.904542][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.904697][ T66] [ 11.904765][ T66] Second to last potentially related work creation: [ 11.904921][ T66] kasan_save_stack+0x24/0x50 [ 11.905073][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 11.905236][ T66] insert_work+0x34/0x230 [ 11.905331][ T66] __queue_work+0x5fd/0xa40 [ 11.905457][ T66] queue_delayed_work_on+0x8c/0xa0 [ 11.905582][ T66] __inet_insert_ifa+0x751/0xb10 [ 11.905714][ T66] inetdev_event+0xb18/0xcf0 [ 11.905836][ T66] notifier_call_chain+0xcd/0x150 [ 11.905963][ T66] __dev_notify_flags+0xe6/0x250 [ 11.906087][ T66] dev_change_flags+0xec/0x160 [ 11.906223][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 11.906347][ T66] rtnl_newlink+0x6de/0xa80 [ 11.906497][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 11.906652][ T66] netlink_rcv_skb+0x130/0x360 [ 11.906780][ T66] netlink_unicast+0x44b/0x710 [ 11.906907][ T66] netlink_sendmsg+0x723/0xbe0 [ 11.907031][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 11.907164][ T66] ___sys_sendmsg+0xee/0x170 [ 11.907294][ T66] __sys_sendmsg+0x109/0x1a0 [ 11.907419][ T66] do_syscall_64+0xc1/0x1d0 [ 11.907544][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.907701][ T66] [ 11.907765][ T66] The buggy address belongs to the object at ffff88800a9d8040 [ 11.907765][ T66] which belongs to the cache net_namespace of size 6528 [ 11.908130][ T66] The buggy address is located 184 bytes inside of [ 11.908130][ T66] freed 6528-byte region [ffff88800a9d8040, ffff88800a9d99c0) [ 11.908445][ T66] [ 11.908513][ T66] The buggy address belongs to the physical page: [ 11.908664][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a9db640 pfn:0xa9d8 [ 11.908908][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.909092][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.909297][ T66] page_type: f5(slab) [ 11.909422][ T66] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.909641][ T66] raw: ffff88800a9db640 0000000000040002 00000001f5000000 0000000000000000 [ 11.909916][ T66] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.910134][ T66] head: ffff88800a9db640 0000000000040002 00000001f5000000 0000000000000000 [ 11.910372][ T66] head: 0080000000000003 ffffea00002a7601 ffffffffffffffff 0000000000000000 [ 11.910623][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.910838][ T66] page dumped because: kasan: bad access detected [ 11.910992][ T66] [ 11.911068][ T66] Memory state around the buggy address: [ 11.911230][ T66] ffff88800a9d7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.911413][ T66] ffff88800a9d8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.911590][ T66] >ffff88800a9d8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.911768][ T66] ^ [ 11.911944][ T66] ffff88800a9d8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.912121][ T66] ffff88800a9d8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.912341][ T66] ================================================================== [ 11.912533][ T66] Disabling lock debugging due to kernel taint