[ 11.632348][ T67] ================================================================== [ 11.632613][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 11.632836][ T67] Read of size 8 at addr ffff88800cd580f8 by task kworker/u16:1/67 [ 11.633062][ T67] [ 11.633135][ T67] CPU: 2 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 11.633347][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.633525][ T67] Workqueue: netns cleanup_net [ 11.633681][ T67] Call Trace: [ 11.633805][ T67] [ 11.633882][ T67] dump_stack_lvl+0x82/0xd0 [ 11.634038][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 11.634223][ T67] ? cleanup_net+0xa5d/0xb90 [ 11.634365][ T67] print_report+0xb4/0x270 [ 11.634509][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 11.634654][ T67] kasan_report+0xbd/0xf0 [ 11.634761][ T67] ? cleanup_net+0xa5d/0xb90 [ 11.634900][ T67] cleanup_net+0xa5d/0xb90 [ 11.635048][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.635192][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 11.635334][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 11.635475][ T67] ? lock_acquire+0x32/0xc0 [ 11.635608][ T67] ? process_one_work+0xe0b/0x16d0 [ 11.635752][ T67] process_one_work+0xe55/0x16d0 [ 11.635896][ T67] ? __pfx___lock_release+0x10/0x10 [ 11.636034][ T67] ? __pfx_process_one_work+0x10/0x10 [ 11.636174][ T67] ? assign_work+0x16c/0x240 [ 11.636314][ T67] worker_thread+0x58c/0xce0 [ 11.636455][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 11.636628][ T67] ? __pfx_worker_thread+0x10/0x10 [ 11.636771][ T67] ? __pfx_worker_thread+0x10/0x10 [ 11.636908][ T67] kthread+0x28a/0x350 [ 11.637010][ T67] ? __pfx_kthread+0x10/0x10 [ 11.637146][ T67] ret_from_fork+0x31/0x70 [ 11.637284][ T67] ? __pfx_kthread+0x10/0x10 [ 11.637422][ T67] ret_from_fork_asm+0x1a/0x30 [ 11.637567][ T67] [ 11.637674][ T67] [ 11.637751][ T67] Allocated by task 252: [ 11.637858][ T67] kasan_save_stack+0x24/0x50 [ 11.638000][ T67] kasan_save_track+0x14/0x30 [ 11.638140][ T67] __kasan_slab_alloc+0x59/0x70 [ 11.638274][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.638412][ T67] copy_net_ns+0xc6/0x540 [ 11.638518][ T67] create_new_namespaces+0x35f/0x920 [ 11.638662][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 11.638801][ T67] ksys_unshare+0x2c4/0x6e0 [ 11.638943][ T67] __x64_sys_unshare+0x31/0x40 [ 11.639080][ T67] do_syscall_64+0xc1/0x1d0 [ 11.639215][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.639386][ T67] [ 11.639456][ T67] Freed by task 67: [ 11.639565][ T67] kasan_save_stack+0x24/0x50 [ 11.639709][ T67] kasan_save_track+0x14/0x30 [ 11.639847][ T67] kasan_save_free_info+0x3b/0x60 [ 11.640003][ T67] __kasan_slab_free+0x38/0x50 [ 11.640139][ T67] kmem_cache_free+0xf8/0x330 [ 11.640274][ T67] cleanup_net+0x5a8/0xb90 [ 11.640428][ T67] process_one_work+0xe55/0x16d0 [ 11.640565][ T67] worker_thread+0x58c/0xce0 [ 11.640697][ T67] kthread+0x28a/0x350 [ 11.640803][ T67] ret_from_fork+0x31/0x70 [ 11.640938][ T67] ret_from_fork_asm+0x1a/0x30 [ 11.641073][ T67] [ 11.641144][ T67] Last potentially related work creation: [ 11.641287][ T67] kasan_save_stack+0x24/0x50 [ 11.641431][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 11.641579][ T67] insert_work+0x34/0x230 [ 11.641683][ T67] __queue_work+0x5fd/0xa40 [ 11.641822][ T67] queue_delayed_work_on+0x8c/0xa0 [ 11.641959][ T67] __inet_insert_ifa+0x751/0xb10 [ 11.642103][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 11.642240][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 11.642381][ T67] netlink_rcv_skb+0x130/0x360 [ 11.642521][ T67] netlink_unicast+0x44b/0x710 [ 11.642659][ T67] netlink_sendmsg+0x723/0xbe0 [ 11.642798][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 11.642936][ T67] ___sys_sendmsg+0xee/0x170 [ 11.643077][ T67] __sys_sendmsg+0x109/0x1a0 [ 11.643212][ T67] do_syscall_64+0xc1/0x1d0 [ 11.643346][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.643518][ T67] [ 11.643591][ T67] Second to last potentially related work creation: [ 11.643759][ T67] kasan_save_stack+0x24/0x50 [ 11.643906][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 11.644045][ T67] insert_work+0x34/0x230 [ 11.644149][ T67] __queue_work+0x5fd/0xa40 [ 11.644283][ T67] queue_delayed_work_on+0x8c/0xa0 [ 11.644422][ T67] __inet_insert_ifa+0x751/0xb10 [ 11.644558][ T67] inetdev_event+0xb18/0xcf0 [ 11.644694][ T67] notifier_call_chain+0xcd/0x150 [ 11.644833][ T67] __dev_notify_flags+0xe6/0x250 [ 11.644974][ T67] dev_change_flags+0xec/0x160 [ 11.645114][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 11.645254][ T67] rtnl_newlink+0x6de/0xa80 [ 11.645391][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 11.645527][ T67] netlink_rcv_skb+0x130/0x360 [ 11.645668][ T67] netlink_unicast+0x44b/0x710 [ 11.645811][ T67] netlink_sendmsg+0x723/0xbe0 [ 11.645950][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 11.646092][ T67] ___sys_sendmsg+0xee/0x170 [ 11.646231][ T67] __sys_sendmsg+0x109/0x1a0 [ 11.646368][ T67] do_syscall_64+0xc1/0x1d0 [ 11.646508][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.646681][ T67] [ 11.646753][ T67] The buggy address belongs to the object at ffff88800cd58040 [ 11.646753][ T67] which belongs to the cache net_namespace of size 6528 [ 11.647125][ T67] The buggy address is located 184 bytes inside of [ 11.647125][ T67] freed 6528-byte region [ffff88800cd58040, ffff88800cd599c0) [ 11.647461][ T67] [ 11.647532][ T67] The buggy address belongs to the physical page: [ 11.647701][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800cd5b640 pfn:0xcd58 [ 11.647984][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.648206][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.648387][ T67] page_type: f5(slab) [ 11.648498][ T67] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.648747][ T67] raw: ffff88800cd5b640 0000000000040002 00000001f5000000 0000000000000000 [ 11.648986][ T67] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.649224][ T67] head: ffff88800cd5b640 0000000000040002 00000001f5000000 0000000000000000 [ 11.649481][ T67] head: 0080000000000003 ffffea0000335601 ffffffffffffffff 0000000000000000 [ 11.649720][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.649957][ T67] page dumped because: kasan: bad access detected [ 11.650126][ T67] [ 11.650201][ T67] Memory state around the buggy address: [ 11.650332][ T67] ffff88800cd57f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.650531][ T67] ffff88800cd58000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.650736][ T67] >ffff88800cd58080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.650944][ T67] ^ [ 11.651151][ T67] ffff88800cd58100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.651351][ T67] ffff88800cd58180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.651562][ T67] ================================================================== [ 11.651838][ T67] Disabling lock debugging due to kernel taint [ 23.485234][ C0] IPv4: Oversized IP packet from 172.17.0.2