[ 11.569766][ T65] ================================================================== [ 11.570005][ T65] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 11.570215][ T65] Read of size 8 at addr ffff888009eb80f8 by task kworker/u16:1/65 [ 11.570419][ T65] [ 11.570492][ T65] CPU: 0 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 11.570694][ T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.570867][ T65] Workqueue: netns cleanup_net [ 11.571012][ T65] Call Trace: [ 11.571115][ T65] [ 11.571188][ T65] dump_stack_lvl+0x82/0xd0 [ 11.571335][ T65] print_address_description.constprop.0+0x2c/0x3b0 [ 11.571509][ T65] ? cleanup_net+0xa5d/0xb90 [ 11.571644][ T65] print_report+0xb4/0x270 [ 11.571776][ T65] ? kasan_addr_to_slab+0x25/0x80 [ 11.571913][ T65] kasan_report+0xbd/0xf0 [ 11.572017][ T65] ? cleanup_net+0xa5d/0xb90 [ 11.572155][ T65] cleanup_net+0xa5d/0xb90 [ 11.572287][ T65] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.572430][ T65] ? __pfx_cleanup_net+0x10/0x10 [ 11.572568][ T65] ? trace_lock_acquire+0x148/0x1f0 [ 11.572705][ T65] ? lock_acquire+0x32/0xc0 [ 11.572841][ T65] ? process_one_work+0xe0b/0x16d0 [ 11.572983][ T65] process_one_work+0xe55/0x16d0 [ 11.573122][ T65] ? __pfx___lock_release+0x10/0x10 [ 11.573257][ T65] ? __pfx_process_one_work+0x10/0x10 [ 11.573396][ T65] ? assign_work+0x16c/0x240 [ 11.573532][ T65] worker_thread+0x58c/0xce0 [ 11.573671][ T65] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 11.573854][ T65] ? __pfx_worker_thread+0x10/0x10 [ 11.573992][ T65] ? __pfx_worker_thread+0x10/0x10 [ 11.574129][ T65] kthread+0x28a/0x350 [ 11.574238][ T65] ? __pfx_kthread+0x10/0x10 [ 11.574374][ T65] ret_from_fork+0x31/0x70 [ 11.574510][ T65] ? __pfx_kthread+0x10/0x10 [ 11.574648][ T65] ret_from_fork_asm+0x1a/0x30 [ 11.574788][ T65] [ 11.574890][ T65] [ 11.574958][ T65] Allocated by task 252: [ 11.575063][ T65] kasan_save_stack+0x24/0x50 [ 11.575204][ T65] kasan_save_track+0x14/0x30 [ 11.575337][ T65] __kasan_slab_alloc+0x59/0x70 [ 11.575471][ T65] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.575611][ T65] copy_net_ns+0xc6/0x540 [ 11.575715][ T65] create_new_namespaces+0x35f/0x920 [ 11.575854][ T65] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 11.575989][ T65] ksys_unshare+0x2c4/0x6e0 [ 11.576127][ T65] __x64_sys_unshare+0x31/0x40 [ 11.576262][ T65] do_syscall_64+0xc1/0x1d0 [ 11.576399][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.576569][ T65] [ 11.576639][ T65] Freed by task 65: [ 11.576740][ T65] kasan_save_stack+0x24/0x50 [ 11.576877][ T65] kasan_save_track+0x14/0x30 [ 11.577011][ T65] kasan_save_free_info+0x3b/0x60 [ 11.577147][ T65] __kasan_slab_free+0x38/0x50 [ 11.577279][ T65] kmem_cache_free+0xf8/0x330 [ 11.577416][ T65] cleanup_net+0x5a8/0xb90 [ 11.577553][ T65] process_one_work+0xe55/0x16d0 [ 11.577689][ T65] worker_thread+0x58c/0xce0 [ 11.577824][ T65] kthread+0x28a/0x350 [ 11.577929][ T65] ret_from_fork+0x31/0x70 [ 11.578064][ T65] ret_from_fork_asm+0x1a/0x30 [ 11.578198][ T65] [ 11.578269][ T65] Last potentially related work creation: [ 11.578403][ T65] kasan_save_stack+0x24/0x50 [ 11.578568][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 11.578710][ T65] insert_work+0x34/0x230 [ 11.578814][ T65] __queue_work+0x5fd/0xa40 [ 11.578951][ T65] queue_delayed_work_on+0x8c/0xa0 [ 11.579088][ T65] __inet_insert_ifa+0x751/0xb10 [ 11.579225][ T65] inetdev_event+0xb18/0xcf0 [ 11.579361][ T65] notifier_call_chain+0xcd/0x150 [ 11.579500][ T65] __dev_notify_flags+0xe6/0x250 [ 11.579635][ T65] dev_change_flags+0xec/0x160 [ 11.579774][ T65] do_setlink.constprop.0+0x79d/0x2300 [ 11.579913][ T65] rtnl_newlink+0x6de/0xa80 [ 11.580052][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 11.580190][ T65] netlink_rcv_skb+0x130/0x360 [ 11.580329][ T65] netlink_unicast+0x44b/0x710 [ 11.580465][ T65] netlink_sendmsg+0x723/0xbe0 [ 11.580603][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 11.580740][ T65] ___sys_sendmsg+0xee/0x170 [ 11.580876][ T65] __sys_sendmsg+0x109/0x1a0 [ 11.581011][ T65] do_syscall_64+0xc1/0x1d0 [ 11.581149][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.581320][ T65] [ 11.581390][ T65] The buggy address belongs to the object at ffff888009eb8040 [ 11.581390][ T65] which belongs to the cache net_namespace of size 6528 [ 11.581753][ T65] The buggy address is located 184 bytes inside of [ 11.581753][ T65] freed 6528-byte region [ffff888009eb8040, ffff888009eb99c0) [ 11.582082][ T65] [ 11.582151][ T65] The buggy address belongs to the physical page: [ 11.582319][ T65] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009ebb640 pfn:0x9eb8 [ 11.582593][ T65] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.582798][ T65] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.582971][ T65] page_type: f5(slab) [ 11.583079][ T65] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.583319][ T65] raw: ffff888009ebb640 0000000000040002 00000001f5000000 0000000000000000 [ 11.583556][ T65] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.583815][ T65] head: ffff888009ebb640 0000000000040002 00000001f5000000 0000000000000000 [ 11.584060][ T65] head: 0080000000000003 ffffea000027ae01 ffffffffffffffff 0000000000000000 [ 11.584301][ T65] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.584547][ T65] page dumped because: kasan: bad access detected [ 11.584716][ T65] [ 11.584786][ T65] Memory state around the buggy address: [ 11.584932][ T65] ffff888009eb7f80: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.585147][ T65] ffff888009eb8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.585345][ T65] >ffff888009eb8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.585547][ T65] ^ [ 11.585751][ T65] ffff888009eb8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.585949][ T65] ffff888009eb8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.586156][ T65] ================================================================== [ 11.586374][ T65] Disabling lock debugging due to kernel taint