[ 11.018232][ T258] ip (258) used greatest stack depth: 23912 bytes left [ 20.391889][ T66] ================================================================== [ 20.392118][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 20.392312][ T66] Read of size 8 at addr ffff8880096b9bf8 by task kworker/u16:1/66 [ 20.392501][ T66] [ 20.392571][ T66] CPU: 1 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 20.392763][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 20.392927][ T66] Workqueue: netns cleanup_net [ 20.393063][ T66] Call Trace: [ 20.393163][ T66] [ 20.393234][ T66] dump_stack_lvl+0x82/0xd0 [ 20.393372][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 20.393542][ T66] ? cleanup_net+0xa5d/0xb90 [ 20.393676][ T66] print_report+0xb4/0x270 [ 20.393808][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 20.393945][ T66] kasan_report+0xbd/0xf0 [ 20.394045][ T66] ? cleanup_net+0xa5d/0xb90 [ 20.394178][ T66] cleanup_net+0xa5d/0xb90 [ 20.394305][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 20.394439][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 20.394571][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 20.394705][ T66] ? lock_acquire+0x32/0xc0 [ 20.394832][ T66] ? process_one_work+0xe0b/0x16d0 [ 20.394963][ T66] process_one_work+0xe55/0x16d0 [ 20.395096][ T66] ? __pfx___lock_release+0x10/0x10 [ 20.395225][ T66] ? __pfx_process_one_work+0x10/0x10 [ 20.395354][ T66] ? assign_work+0x16c/0x240 [ 20.395480][ T66] worker_thread+0x58c/0xce0 [ 20.395610][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 20.395776][ T66] ? __pfx_worker_thread+0x10/0x10 [ 20.395907][ T66] ? __pfx_worker_thread+0x10/0x10 [ 20.396036][ T66] kthread+0x28a/0x350 [ 20.396136][ T66] ? __pfx_kthread+0x10/0x10 [ 20.396266][ T66] ret_from_fork+0x31/0x70 [ 20.396396][ T66] ? __pfx_kthread+0x10/0x10 [ 20.396525][ T66] ret_from_fork_asm+0x1a/0x30 [ 20.396659][ T66] [ 20.396764][ T66] [ 20.396832][ T66] Allocated by task 256: [ 20.396935][ T66] kasan_save_stack+0x24/0x50 [ 20.397066][ T66] kasan_save_track+0x14/0x30 [ 20.397196][ T66] __kasan_slab_alloc+0x59/0x70 [ 20.397328][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 20.397458][ T66] copy_net_ns+0xc6/0x540 [ 20.397558][ T66] create_new_namespaces+0x35f/0x920 [ 20.397689][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 20.397819][ T66] ksys_unshare+0x2c4/0x6e0 [ 20.397953][ T66] __x64_sys_unshare+0x31/0x40 [ 20.398082][ T66] do_syscall_64+0xc1/0x1d0 [ 20.398217][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.398382][ T66] [ 20.398449][ T66] Freed by task 66: [ 20.398548][ T66] kasan_save_stack+0x24/0x50 [ 20.398678][ T66] kasan_save_track+0x14/0x30 [ 20.398807][ T66] kasan_save_free_info+0x3b/0x60 [ 20.398946][ T66] __kasan_slab_free+0x38/0x50 [ 20.399077][ T66] kmem_cache_free+0xf8/0x330 [ 20.399207][ T66] cleanup_net+0x5a8/0xb90 [ 20.399334][ T66] process_one_work+0xe55/0x16d0 [ 20.399465][ T66] worker_thread+0x58c/0xce0 [ 20.399598][ T66] kthread+0x28a/0x350 [ 20.399699][ T66] ret_from_fork+0x31/0x70 [ 20.399830][ T66] ret_from_fork_asm+0x1a/0x30 [ 20.399956][ T66] [ 20.400024][ T66] Last potentially related work creation: [ 20.400154][ T66] kasan_save_stack+0x24/0x50 [ 20.400285][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 20.400419][ T66] insert_work+0x34/0x230 [ 20.400522][ T66] __queue_work+0x5fd/0xa40 [ 20.400652][ T66] queue_delayed_work_on+0x8c/0xa0 [ 20.400782][ T66] __inet_insert_ifa+0x751/0xb10 [ 20.400918][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 20.401050][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 20.401184][ T66] netlink_rcv_skb+0x130/0x360 [ 20.401321][ T66] netlink_unicast+0x44b/0x710 [ 20.401451][ T66] netlink_sendmsg+0x723/0xbe0 [ 20.401579][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 20.401707][ T66] ___sys_sendmsg+0xee/0x170 [ 20.401836][ T66] __sys_sendmsg+0x109/0x1a0 [ 20.401962][ T66] do_syscall_64+0xc1/0x1d0 [ 20.402094][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.402255][ T66] [ 20.402323][ T66] Second to last potentially related work creation: [ 20.402481][ T66] kasan_save_stack+0x24/0x50 [ 20.402613][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 20.402739][ T66] insert_work+0x34/0x230 [ 20.402839][ T66] __queue_work+0x5fd/0xa40 [ 20.402971][ T66] queue_delayed_work_on+0x8c/0xa0 [ 20.403101][ T66] __inet_insert_ifa+0x751/0xb10 [ 20.403233][ T66] inetdev_event+0xb18/0xcf0 [ 20.403368][ T66] notifier_call_chain+0xcd/0x150 [ 20.403500][ T66] __dev_notify_flags+0xe6/0x250 [ 20.403632][ T66] dev_change_flags+0xec/0x160 [ 20.403762][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 20.403894][ T66] rtnl_newlink+0x6de/0xa80 [ 20.404033][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 20.404170][ T66] netlink_rcv_skb+0x130/0x360 [ 20.404304][ T66] netlink_unicast+0x44b/0x710 [ 20.404435][ T66] netlink_sendmsg+0x723/0xbe0 [ 20.404565][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 20.404696][ T66] ___sys_sendmsg+0xee/0x170 [ 20.404825][ T66] __sys_sendmsg+0x109/0x1a0 [ 20.404958][ T66] do_syscall_64+0xc1/0x1d0 [ 20.405086][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.405251][ T66] [ 20.405316][ T66] The buggy address belongs to the object at ffff8880096b9b40 [ 20.405316][ T66] which belongs to the cache net_namespace of size 6528 [ 20.405659][ T66] The buggy address is located 184 bytes inside of [ 20.405659][ T66] freed 6528-byte region [ffff8880096b9b40, ffff8880096bb4c0) [ 20.405974][ T66] [ 20.406042][ T66] The buggy address belongs to the physical page: [ 20.406207][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880096bd140 pfn:0x96b8 [ 20.406474][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 20.406674][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 20.406845][ T66] page_type: f5(slab) [ 20.406951][ T66] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 20.407188][ T66] raw: ffff8880096bd140 0000000000040003 00000001f5000000 0000000000000000 [ 20.407419][ T66] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 20.407652][ T66] head: ffff8880096bd140 0000000000040003 00000001f5000000 0000000000000000 [ 20.407883][ T66] head: 0080000000000003 ffffea000025ae01 ffffffffffffffff 0000000000000000 [ 20.408112][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 20.408343][ T66] page dumped because: kasan: bad access detected [ 20.408507][ T66] [ 20.408574][ T66] Memory state around the buggy address: [ 20.408699][ T66] ffff8880096b9a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.408895][ T66] ffff8880096b9b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 20.409092][ T66] >ffff8880096b9b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.409279][ T66] ^ [ 20.409470][ T66] ffff8880096b9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.409664][ T66] ffff8880096b9c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.409851][ T66] ================================================================== [ 20.410388][ T66] Disabling lock debugging due to kernel taint