[ 10.745846][ T262] ip (262) used greatest stack depth: 24400 bytes left [ 11.696096][ T284] veth0: renamed from veth-rt-1 [ 12.566278][ T293] veth0: renamed from veth-rt-2 [ 50.900765][ T67] ================================================================== [ 50.900994][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 50.901246][ T67] Read of size 8 at addr ffff8880094900f8 by task kworker/u16:1/67 [ 50.901439][ T67] [ 50.901504][ T67] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 50.901711][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 50.901878][ T67] Workqueue: netns cleanup_net [ 50.902011][ T67] Call Trace: [ 50.902107][ T67] [ 50.902172][ T67] dump_stack_lvl+0x82/0xd0 [ 50.902311][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 50.902469][ T67] ? cleanup_net+0xa5d/0xb90 [ 50.902598][ T67] print_report+0xb4/0x270 [ 50.902722][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 50.902850][ T67] kasan_report+0xbd/0xf0 [ 50.902945][ T67] ? cleanup_net+0xa5d/0xb90 [ 50.903069][ T67] cleanup_net+0xa5d/0xb90 [ 50.903194][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 50.903324][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 50.903449][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 50.903577][ T67] ? lock_acquire+0x32/0xc0 [ 50.903707][ T67] ? process_one_work+0xe0b/0x16d0 [ 50.903837][ T67] process_one_work+0xe55/0x16d0 [ 50.903964][ T67] ? __pfx___lock_release+0x10/0x10 [ 50.904095][ T67] ? __pfx_process_one_work+0x10/0x10 [ 50.904230][ T67] ? assign_work+0x16c/0x240 [ 50.904355][ T67] worker_thread+0x58c/0xce0 [ 50.904489][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 50.904648][ T67] ? __pfx_worker_thread+0x10/0x10 [ 50.904779][ T67] ? __pfx_worker_thread+0x10/0x10 [ 50.904901][ T67] kthread+0x28a/0x350 [ 50.905000][ T67] ? __pfx_kthread+0x10/0x10 [ 50.905131][ T67] ret_from_fork+0x31/0x70 [ 50.905266][ T67] ? __pfx_kthread+0x10/0x10 [ 50.905391][ T67] ret_from_fork_asm+0x1a/0x30 [ 50.905521][ T67] [ 50.905618][ T67] [ 50.905682][ T67] Allocated by task 267: [ 50.905796][ T67] kasan_save_stack+0x24/0x50 [ 50.905933][ T67] kasan_save_track+0x14/0x30 [ 50.906066][ T67] __kasan_slab_alloc+0x59/0x70 [ 50.906193][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 50.906318][ T67] copy_net_ns+0xc6/0x540 [ 50.906418][ T67] create_new_namespaces+0x35f/0x920 [ 50.906547][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 50.906674][ T67] ksys_unshare+0x2c4/0x6e0 [ 50.906804][ T67] __x64_sys_unshare+0x31/0x40 [ 50.906932][ T67] do_syscall_64+0xc1/0x1d0 [ 50.907063][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 50.907233][ T67] [ 50.907295][ T67] Freed by task 67: [ 50.907396][ T67] kasan_save_stack+0x24/0x50 [ 50.907524][ T67] kasan_save_track+0x14/0x30 [ 50.907654][ T67] kasan_save_free_info+0x3b/0x60 [ 50.907777][ T67] __kasan_slab_free+0x38/0x50 [ 50.907900][ T67] kmem_cache_free+0xf8/0x330 [ 50.908023][ T67] cleanup_net+0x5a8/0xb90 [ 50.908150][ T67] process_one_work+0xe55/0x16d0 [ 50.908272][ T67] worker_thread+0x58c/0xce0 [ 50.908397][ T67] kthread+0x28a/0x350 [ 50.908498][ T67] ret_from_fork+0x31/0x70 [ 50.908625][ T67] ret_from_fork_asm+0x1a/0x30 [ 50.908754][ T67] [ 50.908821][ T67] Last potentially related work creation: [ 50.908944][ T67] kasan_save_stack+0x24/0x50 [ 50.909075][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 50.909200][ T67] insert_work+0x34/0x230 [ 50.909303][ T67] __queue_work+0x5fd/0xa40 [ 50.909433][ T67] queue_delayed_work_on+0x8c/0xa0 [ 50.909560][ T67] __inet_insert_ifa+0x751/0xb10 [ 50.909688][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 50.909817][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 50.909945][ T67] netlink_rcv_skb+0x130/0x360 [ 50.910092][ T67] netlink_unicast+0x44b/0x710 [ 50.910226][ T67] netlink_sendmsg+0x723/0xbe0 [ 50.910350][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 50.910479][ T67] ___sys_sendmsg+0xee/0x170 [ 50.910621][ T67] __sys_sendmsg+0x109/0x1a0 [ 50.910751][ T67] do_syscall_64+0xc1/0x1d0 [ 50.910877][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 50.911034][ T67] [ 50.911099][ T67] Second to last potentially related work creation: [ 50.911253][ T67] kasan_save_stack+0x24/0x50 [ 50.911382][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 50.911506][ T67] insert_work+0x34/0x230 [ 50.911603][ T67] __queue_work+0x5fd/0xa40 [ 50.911727][ T67] queue_delayed_work_on+0x8c/0xa0 [ 50.911856][ T67] __inet_insert_ifa+0x751/0xb10 [ 50.911980][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 50.912103][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 50.912225][ T67] netlink_rcv_skb+0x130/0x360 [ 50.912352][ T67] netlink_unicast+0x44b/0x710 [ 50.912481][ T67] netlink_sendmsg+0x723/0xbe0 [ 50.912607][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 50.912734][ T67] ___sys_sendmsg+0xee/0x170 [ 50.912862][ T67] __sys_sendmsg+0x109/0x1a0 [ 50.912983][ T67] do_syscall_64+0xc1/0x1d0 [ 50.913110][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 50.913268][ T67] [ 50.913333][ T67] The buggy address belongs to the object at ffff888009490040 [ 50.913333][ T67] which belongs to the cache net_namespace of size 6528 [ 50.913658][ T67] The buggy address is located 184 bytes inside of [ 50.913658][ T67] freed 6528-byte region [ffff888009490040, ffff8880094919c0) [ 50.913956][ T67] [ 50.914020][ T67] The buggy address belongs to the physical page: [ 50.914173][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9490 [ 50.914394][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 50.914580][ T67] flags: 0x80000000000040(head|node=0|zone=1) [ 50.914737][ T67] page_type: f5(slab) [ 50.914836][ T67] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 50.915059][ T67] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 50.915283][ T67] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 50.915503][ T67] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 50.915721][ T67] head: 0080000000000003 ffffea0000252401 ffffffffffffffff 0000000000000000 [ 50.915940][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 50.916158][ T67] page dumped because: kasan: bad access detected [ 50.916308][ T67] [ 50.916371][ T67] Memory state around the buggy address: [ 50.916491][ T67] ffff88800948ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 50.916677][ T67] ffff888009490000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 50.916855][ T67] >ffff888009490080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.917031][ T67] ^ [ 50.917208][ T67] ffff888009490100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.917388][ T67] ffff888009490180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.917560][ T67] ================================================================== [ 50.917760][ T67] Disabling lock debugging due to kernel taint