[ 30.392479][ T66] ================================================================== [ 30.392717][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 30.392914][ T66] Read of size 8 at addr ffff888008ed00f8 by task kworker/u16:1/66 [ 30.393116][ T66] [ 30.393191][ T66] CPU: 3 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 30.393395][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 30.393562][ T66] Workqueue: netns cleanup_net [ 30.393705][ T66] Call Trace: [ 30.393809][ T66] <TASK> [ 30.393879][ T66] dump_stack_lvl+0x82/0xd0 [ 30.394008][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 30.394174][ T66] ? cleanup_net+0x932/0xa40 [ 30.394307][ T66] print_report+0xb4/0x270 [ 30.394440][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 30.394567][ T66] kasan_report+0xbd/0xf0 [ 30.394668][ T66] ? cleanup_net+0x932/0xa40 [ 30.394799][ T66] cleanup_net+0x932/0xa40 [ 30.394934][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.395066][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 30.395192][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 30.395323][ T66] ? lock_acquire+0x32/0xc0 [ 30.395448][ T66] ? process_one_work+0xe0b/0x16d0 [ 30.395580][ T66] process_one_work+0xe55/0x16d0 [ 30.395710][ T66] ? __pfx___lock_release+0x10/0x10 [ 30.395843][ T66] ? __pfx_process_one_work+0x10/0x10 [ 30.395975][ T66] ? assign_work+0x16c/0x240 [ 30.396105][ T66] worker_thread+0x58c/0xce0 [ 30.396233][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 30.396392][ T66] ? __pfx_worker_thread+0x10/0x10 [ 30.396522][ T66] ? __pfx_worker_thread+0x10/0x10 [ 30.396650][ T66] kthread+0x28a/0x350 [ 30.396750][ T66] ? __pfx_kthread+0x10/0x10 [ 30.396878][ T66] ret_from_fork+0x31/0x70 [ 30.397006][ T66] ? __pfx_kthread+0x10/0x10 [ 30.397133][ T66] ret_from_fork_asm+0x1a/0x30 [ 30.397265][ T66] </TASK> [ 30.397362][ T66] [ 30.397442][ T66] Allocated by task 250: [ 30.397536][ T66] kasan_save_stack+0x24/0x50 [ 30.397666][ T66] kasan_save_track+0x14/0x30 [ 30.397794][ T66] __kasan_slab_alloc+0x59/0x70 [ 30.397922][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 30.398059][ T66] copy_net_ns+0xc6/0x340 [ 30.398157][ T66] create_new_namespaces+0x35f/0x920 [ 30.398289][ T66] unshare_nsproxy_namespaces+0x8d/0x130 [ 30.398415][ T66] ksys_unshare+0x2a9/0x660 [ 30.398542][ T66] __x64_sys_unshare+0x31/0x40 [ 30.398670][ T66] do_syscall_64+0xc1/0x1d0 [ 30.398798][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 30.398962][ T66] [ 30.399027][ T66] Freed by task 66: [ 30.399123][ T66] kasan_save_stack+0x24/0x50 [ 30.399250][ T66] kasan_save_track+0x14/0x30 [ 30.399375][ T66] kasan_save_free_info+0x3b/0x60 [ 30.399506][ T66] __kasan_slab_free+0x38/0x50 [ 30.399630][ T66] kmem_cache_free+0xf8/0x330 [ 30.399756][ T66] cleanup_net+0x5a8/0xa40 [ 30.399884][ T66] process_one_work+0xe55/0x16d0 [ 30.400014][ T66] worker_thread+0x58c/0xce0 [ 30.400140][ T66] kthread+0x28a/0x350 [ 30.400239][ T66] ret_from_fork+0x31/0x70 [ 30.400367][ T66] ret_from_fork_asm+0x1a/0x30 [ 30.400492][ T66] [ 30.400558][ T66] Last potentially related work creation: [ 30.400684][ T66] kasan_save_stack+0x24/0x50 [ 30.400815][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 30.400943][ T66] insert_work+0x34/0x230 [ 30.401039][ T66] __queue_work+0x5fd/0xa40 [ 30.401165][ T66] queue_delayed_work_on+0x8c/0xa0 [ 30.401299][ T66] __inet_insert_ifa+0x751/0xb10 [ 30.401432][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 30.401560][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 30.401694][ T66] netlink_rcv_skb+0x130/0x360 [ 30.401824][ T66] netlink_unicast+0x44b/0x710 [ 30.401948][ T66] netlink_sendmsg+0x723/0xbe0 [ 30.402078][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 30.402213][ T66] ___sys_sendmsg+0xee/0x170 [ 30.402359][ T66] __sys_sendmsg+0x109/0x1a0 [ 30.402489][ T66] do_syscall_64+0xc1/0x1d0 [ 30.402616][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 30.402784][ T66] [ 30.402851][ T66] Second to last potentially related work creation: [ 30.403014][ T66] kasan_save_stack+0x24/0x50 [ 30.403145][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 30.403275][ T66] insert_work+0x34/0x230 [ 30.403373][ T66] __queue_work+0x5fd/0xa40 [ 30.403503][ T66] queue_delayed_work_on+0x8c/0xa0 [ 30.403638][ T66] __inet_insert_ifa+0x751/0xb10 [ 30.403766][ T66] inetdev_event+0xb18/0xcf0 [ 30.403895][ T66] notifier_call_chain+0xcd/0x150 [ 30.404025][ T66] __dev_notify_flags+0xe6/0x250 [ 30.404155][ T66] dev_change_flags+0xec/0x160 [ 30.404281][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 30.404411][ T66] rtnl_newlink+0x6de/0xa80 [ 30.404542][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 30.404677][ T66] netlink_rcv_skb+0x130/0x360 [ 30.404807][ T66] netlink_unicast+0x44b/0x710 [ 30.404938][ T66] netlink_sendmsg+0x723/0xbe0 [ 30.405070][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 30.405202][ T66] ___sys_sendmsg+0xee/0x170 [ 30.405332][ T66] __sys_sendmsg+0x109/0x1a0 [ 30.405462][ T66] do_syscall_64+0xc1/0x1d0 [ 30.405593][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 30.405759][ T66] [ 30.405824][ T66] The buggy address belongs to the object at ffff888008ed0040 [ 30.405824][ T66] which belongs to the cache net_namespace of size 6592 [ 30.406165][ T66] The buggy address is located 184 bytes inside of [ 30.406165][ T66] freed 6592-byte region [ffff888008ed0040, ffff888008ed1a00) [ 30.406483][ T66] [ 30.406549][ T66] The buggy address belongs to the physical page: [ 30.406707][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8ed0 [ 30.406939][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 30.407137][ T66] flags: 0x80000000000040(head|node=0|zone=1) [ 30.407303][ T66] page_type: f5(slab) [ 30.407407][ T66] raw: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 30.407646][ T66] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 30.407873][ T66] head: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 30.408098][ T66] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 30.408329][ T66] head: 0080000000000003 ffffea000023b401 ffffffffffffffff 0000000000000000 [ 30.408563][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 30.408792][ T66] page dumped because: kasan: bad access detected [ 30.408950][ T66] [ 30.409018][ T66] Memory state around the buggy address: [ 30.409144][ T66] ffff888008ecff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.409330][ T66] ffff888008ed0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.409521][ T66] >ffff888008ed0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.409823][ T66] ^ [ 30.410026][ T66] ffff888008ed0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.410215][ T66] ffff888008ed0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.410471][ T66] ================================================================== [ 30.410672][ T66] Disabling lock debugging due to kernel taint