[ 14.916310][ T11] ================================================================== [ 14.916548][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 14.916743][ T11] Read of size 8 at addr ffff8880097c80f8 by task kworker/u16:0/11 [ 14.916948][ T11] [ 14.917025][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 14.917236][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 14.917395][ T11] Workqueue: netns cleanup_net [ 14.917547][ T11] Call Trace: [ 14.917640][ T11] [ 14.917711][ T11] dump_stack_lvl+0x82/0xd0 [ 14.917882][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 14.918046][ T11] ? cleanup_net+0x932/0xa40 [ 14.918173][ T11] print_report+0xb4/0x270 [ 14.918297][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 14.918425][ T11] kasan_report+0xbd/0xf0 [ 14.918520][ T11] ? cleanup_net+0x932/0xa40 [ 14.918654][ T11] cleanup_net+0x932/0xa40 [ 14.918781][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 14.918916][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 14.919048][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 14.919202][ T11] ? lock_acquire+0x32/0xc0 [ 14.919328][ T11] ? process_one_work+0xe0b/0x16d0 [ 14.919455][ T11] process_one_work+0xe55/0x16d0 [ 14.919598][ T11] ? __pfx___lock_release+0x10/0x10 [ 14.919737][ T11] ? __pfx_process_one_work+0x10/0x10 [ 14.919877][ T11] ? assign_work+0x16c/0x240 [ 14.920010][ T11] worker_thread+0x58c/0xce0 [ 14.920139][ T11] ? __pfx_worker_thread+0x10/0x10 [ 14.920265][ T11] kthread+0x28a/0x350 [ 14.920363][ T11] ? __pfx_kthread+0x10/0x10 [ 14.920492][ T11] ret_from_fork+0x31/0x70 [ 14.920622][ T11] ? __pfx_kthread+0x10/0x10 [ 14.920748][ T11] ret_from_fork_asm+0x1a/0x30 [ 14.920883][ T11] [ 14.920976][ T11] [ 14.921076][ T11] Allocated by task 224: [ 14.921178][ T11] kasan_save_stack+0x24/0x50 [ 14.921310][ T11] kasan_save_track+0x14/0x30 [ 14.921438][ T11] __kasan_slab_alloc+0x59/0x70 [ 14.921562][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 14.921695][ T11] copy_net_ns+0xc6/0x340 [ 14.921797][ T11] create_new_namespaces+0x35f/0x920 [ 14.921928][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 14.922064][ T11] ksys_unshare+0x2a9/0x660 [ 14.922218][ T11] __x64_sys_unshare+0x31/0x40 [ 14.922343][ T11] do_syscall_64+0xc1/0x1d0 [ 14.922469][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.922624][ T11] [ 14.922690][ T11] Freed by task 11: [ 14.922796][ T11] kasan_save_stack+0x24/0x50 [ 14.922925][ T11] kasan_save_track+0x14/0x30 [ 14.923045][ T11] kasan_save_free_info+0x3b/0x60 [ 14.923170][ T11] __kasan_slab_free+0x38/0x50 [ 14.923298][ T11] kmem_cache_free+0xf8/0x330 [ 14.923427][ T11] cleanup_net+0x5a8/0xa40 [ 14.923554][ T11] process_one_work+0xe55/0x16d0 [ 14.923704][ T11] worker_thread+0x58c/0xce0 [ 14.923830][ T11] kthread+0x28a/0x350 [ 14.923927][ T11] ret_from_fork+0x31/0x70 [ 14.924052][ T11] ret_from_fork_asm+0x1a/0x30 [ 14.924179][ T11] [ 14.924244][ T11] Last potentially related work creation: [ 14.924365][ T11] kasan_save_stack+0x24/0x50 [ 14.924496][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 14.924620][ T11] insert_work+0x34/0x230 [ 14.924715][ T11] __queue_work+0x5fd/0xa40 [ 14.924837][ T11] queue_delayed_work_on+0x8c/0xa0 [ 14.924964][ T11] __inet_insert_ifa+0x751/0xb10 [ 14.925116][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 14.925240][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 14.925369][ T11] netlink_rcv_skb+0x130/0x360 [ 14.925492][ T11] netlink_unicast+0x44b/0x710 [ 14.925617][ T11] netlink_sendmsg+0x723/0xbe0 [ 14.925741][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 14.925871][ T11] ___sys_sendmsg+0xee/0x170 [ 14.925998][ T11] __sys_sendmsg+0x109/0x1a0 [ 14.926122][ T11] do_syscall_64+0xc1/0x1d0 [ 14.926248][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.926472][ T11] [ 14.926536][ T11] The buggy address belongs to the object at ffff8880097c8040 [ 14.926536][ T11] which belongs to the cache net_namespace of size 5696 [ 14.926855][ T11] The buggy address is located 184 bytes inside of [ 14.926855][ T11] freed 5696-byte region [ffff8880097c8040, ffff8880097c9680) [ 14.927207][ T11] [ 14.927271][ T11] The buggy address belongs to the physical page: [ 14.927427][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880097cafc0 pfn:0x97c8 [ 14.927702][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 14.927893][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 14.928114][ T11] page_type: f5(slab) [ 14.928213][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 14.928436][ T11] raw: ffff8880097cafc0 0000000000050002 00000001f5000000 0000000000000000 [ 14.928651][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 14.928869][ T11] head: ffff8880097cafc0 0000000000050002 00000001f5000000 0000000000000000 [ 14.929197][ T11] head: 0080000000000003 ffffea000025f201 ffffffffffffffff 0000000000000000 [ 14.929420][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 14.929631][ T11] page dumped because: kasan: bad access detected [ 14.929788][ T11] [ 14.929855][ T11] Memory state around the buggy address: [ 14.929977][ T11] ffff8880097c7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 14.930162][ T11] ffff8880097c8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 14.930400][ T11] >ffff8880097c8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.930585][ T11] ^ [ 14.930762][ T11] ffff8880097c8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.931004][ T11] ffff8880097c8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.931184][ T11] ================================================================== [ 14.931432][ T11] Disabling lock debugging due to kernel taint