[ 15.187920][ T320] ip (320) used greatest stack depth: 23864 bytes left [ 15.299398][ T321] ip_local_port_range: prefer different parity for start/end values. [ 15.715877][ T65] ================================================================== [ 15.716190][ T65] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 15.716408][ T65] Read of size 8 at addr ffff888004f680f8 by task kworker/u16:1/65 [ 15.716604][ T65] [ 15.716675][ T65] CPU: 3 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 15.716884][ T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.717056][ T65] Workqueue: netns cleanup_net [ 15.717199][ T65] Call Trace: [ 15.717306][ T65] [ 15.717380][ T65] dump_stack_lvl+0x82/0xd0 [ 15.717521][ T65] print_address_description.constprop.0+0x2c/0x3b0 [ 15.717695][ T65] ? cleanup_net+0xa5d/0xb90 [ 15.717835][ T65] print_report+0xb4/0x270 [ 15.717969][ T65] ? kasan_addr_to_slab+0x25/0x80 [ 15.718104][ T65] kasan_report+0xbd/0xf0 [ 15.718207][ T65] ? cleanup_net+0xa5d/0xb90 [ 15.718347][ T65] cleanup_net+0xa5d/0xb90 [ 15.718483][ T65] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 15.718622][ T65] ? __pfx_cleanup_net+0x10/0x10 [ 15.718758][ T65] ? trace_lock_acquire+0x148/0x1f0 [ 15.718897][ T65] ? lock_acquire+0x32/0xc0 [ 15.719034][ T65] ? process_one_work+0xe0b/0x16d0 [ 15.719172][ T65] process_one_work+0xe55/0x16d0 [ 15.719312][ T65] ? __pfx___lock_release+0x10/0x10 [ 15.719448][ T65] ? __pfx_process_one_work+0x10/0x10 [ 15.719590][ T65] ? assign_work+0x16c/0x240 [ 15.719727][ T65] worker_thread+0x58c/0xce0 [ 15.719863][ T65] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 15.720034][ T65] ? __pfx_worker_thread+0x10/0x10 [ 15.720176][ T65] ? __pfx_worker_thread+0x10/0x10 [ 15.720310][ T65] kthread+0x28a/0x350 [ 15.720415][ T65] ? __pfx_kthread+0x10/0x10 [ 15.720553][ T65] ret_from_fork+0x31/0x70 [ 15.720691][ T65] ? __pfx_kthread+0x10/0x10 [ 15.720827][ T65] ret_from_fork_asm+0x1a/0x30 [ 15.720971][ T65] [ 15.721080][ T65] [ 15.721150][ T65] Allocated by task 253: [ 15.721254][ T65] kasan_save_stack+0x24/0x50 [ 15.721392][ T65] kasan_save_track+0x14/0x30 [ 15.721525][ T65] __kasan_slab_alloc+0x59/0x70 [ 15.721659][ T65] kmem_cache_alloc_noprof+0x10b/0x350 [ 15.721801][ T65] copy_net_ns+0xc6/0x540 [ 15.721901][ T65] create_new_namespaces+0x35f/0x920 [ 15.722036][ T65] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 15.722170][ T65] ksys_unshare+0x2c4/0x6e0 [ 15.722307][ T65] __x64_sys_unshare+0x31/0x40 [ 15.722443][ T65] do_syscall_64+0xc1/0x1d0 [ 15.722578][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.722747][ T65] [ 15.722817][ T65] Freed by task 65: [ 15.722918][ T65] kasan_save_stack+0x24/0x50 [ 15.723054][ T65] kasan_save_track+0x14/0x30 [ 15.723188][ T65] kasan_save_free_info+0x3b/0x60 [ 15.723323][ T65] __kasan_slab_free+0x38/0x50 [ 15.723457][ T65] kmem_cache_free+0xf8/0x330 [ 15.723590][ T65] cleanup_net+0x5a8/0xb90 [ 15.723724][ T65] process_one_work+0xe55/0x16d0 [ 15.723859][ T65] worker_thread+0x58c/0xce0 [ 15.723994][ T65] kthread+0x28a/0x350 [ 15.724096][ T65] ret_from_fork+0x31/0x70 [ 15.724228][ T65] ret_from_fork_asm+0x1a/0x30 [ 15.724369][ T65] [ 15.724438][ T65] Last potentially related work creation: [ 15.724572][ T65] kasan_save_stack+0x24/0x50 [ 15.724711][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 15.724849][ T65] insert_work+0x34/0x230 [ 15.724951][ T65] __queue_work+0x5fd/0xa40 [ 15.725087][ T65] queue_delayed_work_on+0x8c/0xa0 [ 15.725223][ T65] __inet_insert_ifa+0x751/0xb10 [ 15.725365][ T65] inetdev_event+0xb18/0xcf0 [ 15.725502][ T65] notifier_call_chain+0xcd/0x150 [ 15.725637][ T65] __dev_notify_flags+0xe6/0x250 [ 15.725773][ T65] dev_change_flags+0xec/0x160 [ 15.725907][ T65] do_setlink.constprop.0+0x79d/0x2300 [ 15.726044][ T65] rtnl_newlink+0x6de/0xa80 [ 15.726180][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 15.726316][ T65] netlink_rcv_skb+0x130/0x360 [ 15.726456][ T65] netlink_unicast+0x44b/0x710 [ 15.726594][ T65] netlink_sendmsg+0x723/0xbe0 [ 15.726743][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 15.726883][ T65] ___sys_sendmsg+0xee/0x170 [ 15.727019][ T65] __sys_sendmsg+0x109/0x1a0 [ 15.727155][ T65] do_syscall_64+0xc1/0x1d0 [ 15.727290][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.727460][ T65] [ 15.727533][ T65] The buggy address belongs to the object at ffff888004f68040 [ 15.727533][ T65] which belongs to the cache net_namespace of size 6528 [ 15.727892][ T65] The buggy address is located 184 bytes inside of [ 15.727892][ T65] freed 6528-byte region [ffff888004f68040, ffff888004f699c0) [ 15.728218][ T65] [ 15.728289][ T65] The buggy address belongs to the physical page: [ 15.728457][ T65] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004f6b640 pfn:0x4f68 [ 15.728735][ T65] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 15.728945][ T65] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 15.729123][ T65] page_type: f5(slab) [ 15.729230][ T65] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 15.729474][ T65] raw: ffff888004f6b640 0000000000040002 00000001f5000000 0000000000000000 [ 15.729717][ T65] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 15.729958][ T65] head: ffff888004f6b640 0000000000040002 00000001f5000000 0000000000000000 [ 15.730194][ T65] head: 0080000000000003 ffffea000013da01 ffffffffffffffff 0000000000000000 [ 15.730438][ T65] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 15.730672][ T65] page dumped because: kasan: bad access detected [ 15.730840][ T65] [ 15.730910][ T65] Memory state around the buggy address: [ 15.731044][ T65] ffff888004f67f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.731247][ T65] ffff888004f68000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 15.731440][ T65] >ffff888004f68080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.731634][ T65] ^ [ 15.731833][ T65] ffff888004f68100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.732029][ T65] ffff888004f68180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.732222][ T65] ================================================================== [ 15.732442][ T65] Disabling lock debugging due to kernel taint