[ 43.839020][ T66] ================================================================== [ 43.839250][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 43.839444][ T66] Read of size 8 at addr ffff8880093880f8 by task kworker/u16:1/66 [ 43.839664][ T66] [ 43.839730][ T66] CPU: 2 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 43.839979][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 43.840170][ T66] Workqueue: netns cleanup_net [ 43.840333][ T66] Call Trace: [ 43.840450][ T66] [ 43.840541][ T66] dump_stack_lvl+0x82/0xd0 [ 43.840704][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 43.840932][ T66] ? cleanup_net+0x932/0xa40 [ 43.841099][ T66] print_report+0xb4/0x270 [ 43.841270][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 43.841442][ T66] kasan_report+0xbd/0xf0 [ 43.841571][ T66] ? cleanup_net+0x932/0xa40 [ 43.841738][ T66] cleanup_net+0x932/0xa40 [ 43.841902][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.842076][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 43.842248][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 43.842405][ T66] ? lock_acquire+0x32/0xc0 [ 43.842558][ T66] ? process_one_work+0xe0b/0x16d0 [ 43.842727][ T66] process_one_work+0xe55/0x16d0 [ 43.842889][ T66] ? __pfx___lock_release+0x10/0x10 [ 43.843059][ T66] ? __pfx_process_one_work+0x10/0x10 [ 43.843200][ T66] ? assign_work+0x16c/0x240 [ 43.843348][ T66] worker_thread+0x58c/0xce0 [ 43.843516][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 43.843708][ T66] ? __pfx_worker_thread+0x10/0x10 [ 43.843863][ T66] ? __pfx_worker_thread+0x10/0x10 [ 43.844009][ T66] kthread+0x28a/0x350 [ 43.844130][ T66] ? __pfx_kthread+0x10/0x10 [ 43.844286][ T66] ret_from_fork+0x31/0x70 [ 43.844441][ T66] ? __pfx_kthread+0x10/0x10 [ 43.844608][ T66] ret_from_fork_asm+0x1a/0x30 [ 43.844776][ T66] [ 43.844892][ T66] [ 43.844970][ T66] Allocated by task 250: [ 43.845086][ T66] kasan_save_stack+0x24/0x50 [ 43.845238][ T66] kasan_save_track+0x14/0x30 [ 43.845430][ T66] __kasan_slab_alloc+0x59/0x70 [ 43.845576][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 43.845718][ T66] copy_net_ns+0xc6/0x340 [ 43.845825][ T66] create_new_namespaces+0x35f/0x920 [ 43.845967][ T66] unshare_nsproxy_namespaces+0x8d/0x130 [ 43.846113][ T66] ksys_unshare+0x2a9/0x660 [ 43.846260][ T66] __x64_sys_unshare+0x31/0x40 [ 43.846399][ T66] do_syscall_64+0xc1/0x1d0 [ 43.846541][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 43.846718][ T66] [ 43.846790][ T66] Freed by task 66: [ 43.846894][ T66] kasan_save_stack+0x24/0x50 [ 43.847031][ T66] kasan_save_track+0x14/0x30 [ 43.847167][ T66] kasan_save_free_info+0x3b/0x60 [ 43.847306][ T66] __kasan_slab_free+0x38/0x50 [ 43.847443][ T66] kmem_cache_free+0xf8/0x330 [ 43.847582][ T66] cleanup_net+0x5a8/0xa40 [ 43.847720][ T66] process_one_work+0xe55/0x16d0 [ 43.847865][ T66] worker_thread+0x58c/0xce0 [ 43.848004][ T66] kthread+0x28a/0x350 [ 43.848110][ T66] ret_from_fork+0x31/0x70 [ 43.848256][ T66] ret_from_fork_asm+0x1a/0x30 [ 43.848398][ T66] [ 43.848472][ T66] Last potentially related work creation: [ 43.848611][ T66] kasan_save_stack+0x24/0x50 [ 43.848752][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 43.848894][ T66] insert_work+0x34/0x230 [ 43.848998][ T66] __queue_work+0x5fd/0xa40 [ 43.849138][ T66] queue_delayed_work_on+0x8c/0xa0 [ 43.849276][ T66] __inet_insert_ifa+0x751/0xb10 [ 43.849420][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 43.849558][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 43.849695][ T66] netlink_rcv_skb+0x130/0x360 [ 43.849830][ T66] netlink_unicast+0x44b/0x710 [ 43.849965][ T66] netlink_sendmsg+0x723/0xbe0 [ 43.850101][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 43.850244][ T66] ___sys_sendmsg+0xee/0x170 [ 43.850387][ T66] __sys_sendmsg+0x109/0x1a0 [ 43.850526][ T66] do_syscall_64+0xc1/0x1d0 [ 43.850665][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 43.850841][ T66] [ 43.850913][ T66] Second to last potentially related work creation: [ 43.851086][ T66] kasan_save_stack+0x24/0x50 [ 43.851224][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 43.851364][ T66] insert_work+0x34/0x230 [ 43.851471][ T66] __queue_work+0x5fd/0xa40 [ 43.851606][ T66] queue_delayed_work_on+0x8c/0xa0 [ 43.851741][ T66] __inet_insert_ifa+0x751/0xb10 [ 43.851879][ T66] inetdev_event+0xb18/0xcf0 [ 43.852018][ T66] notifier_call_chain+0xcd/0x150 [ 43.852159][ T66] __dev_notify_flags+0xe6/0x250 [ 43.852296][ T66] dev_change_flags+0xec/0x160 [ 43.852435][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 43.852585][ T66] rtnl_newlink+0x6de/0xa80 [ 43.852721][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 43.852851][ T66] netlink_rcv_skb+0x130/0x360 [ 43.852976][ T66] netlink_unicast+0x44b/0x710 [ 43.853098][ T66] netlink_sendmsg+0x723/0xbe0 [ 43.853225][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 43.853348][ T66] ___sys_sendmsg+0xee/0x170 [ 43.853471][ T66] __sys_sendmsg+0x109/0x1a0 [ 43.853600][ T66] do_syscall_64+0xc1/0x1d0 [ 43.853754][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 43.853927][ T66] [ 43.853999][ T66] The buggy address belongs to the object at ffff888009388040 [ 43.853999][ T66] which belongs to the cache net_namespace of size 6592 [ 43.854351][ T66] The buggy address is located 184 bytes inside of [ 43.854351][ T66] freed 6592-byte region [ffff888009388040, ffff888009389a00) [ 43.854683][ T66] [ 43.854755][ T66] The buggy address belongs to the physical page: [ 43.854924][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9388 [ 43.855173][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 43.855380][ T66] flags: 0x80000000000040(head|node=0|zone=1) [ 43.855576][ T66] page_type: f5(slab) [ 43.855688][ T66] raw: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 43.855935][ T66] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 43.856180][ T66] head: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 43.856431][ T66] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 43.856678][ T66] head: 0080000000000003 ffffea000024e201 ffffffffffffffff 0000000000000000 [ 43.856919][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 43.857158][ T66] page dumped because: kasan: bad access detected [ 43.857328][ T66] [ 43.857398][ T66] Memory state around the buggy address: [ 43.857536][ T66] ffff888009387f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 43.857735][ T66] ffff888009388000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 43.857934][ T66] >ffff888009388080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.858138][ T66] ^ [ 43.858336][ T66] ffff888009388100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.858541][ T66] ffff888009388180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.858735][ T66] ================================================================== [ 43.859009][ T66] Disabling lock debugging due to kernel taint