[ 13.926668][ T11] ================================================================== [ 13.926890][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 13.927078][ T11] Read of size 8 at addr ffff888009b700f8 by task kworker/u16:0/11 [ 13.927259][ T11] [ 13.927323][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 13.927609][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.927763][ T11] Workqueue: netns cleanup_net [ 13.927893][ T11] Call Trace: [ 13.927987][ T11] [ 13.928054][ T11] dump_stack_lvl+0x82/0xd0 [ 13.928182][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 13.928339][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.928463][ T11] print_report+0xb4/0x270 [ 13.928588][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 13.928708][ T11] kasan_report+0xbd/0xf0 [ 13.928804][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.928927][ T11] cleanup_net+0xa5d/0xb90 [ 13.929050][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.929179][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 13.929301][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 13.929423][ T11] ? lock_acquire+0x32/0xc0 [ 13.929546][ T11] ? process_one_work+0xe0b/0x16d0 [ 13.929676][ T11] process_one_work+0xe55/0x16d0 [ 13.929800][ T11] ? __pfx___lock_release+0x10/0x10 [ 13.929925][ T11] ? __pfx_process_one_work+0x10/0x10 [ 13.930054][ T11] ? assign_work+0x16c/0x240 [ 13.930179][ T11] worker_thread+0x58c/0xce0 [ 13.930304][ T11] ? __pfx_worker_thread+0x10/0x10 [ 13.930431][ T11] kthread+0x28a/0x350 [ 13.930528][ T11] ? __pfx_kthread+0x10/0x10 [ 13.930652][ T11] ret_from_fork+0x31/0x70 [ 13.930774][ T11] ? __pfx_kthread+0x10/0x10 [ 13.930899][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.931027][ T11] [ 13.931119][ T11] [ 13.931184][ T11] Allocated by task 260: [ 13.931277][ T11] kasan_save_stack+0x24/0x50 [ 13.931401][ T11] kasan_save_track+0x14/0x30 [ 13.931526][ T11] __kasan_slab_alloc+0x59/0x70 [ 13.931650][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 13.931773][ T11] copy_net_ns+0xc6/0x540 [ 13.931865][ T11] create_new_namespaces+0x35f/0x920 [ 13.931989][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 13.932115][ T11] ksys_unshare+0x2c4/0x6e0 [ 13.932240][ T11] __x64_sys_unshare+0x31/0x40 [ 13.932364][ T11] do_syscall_64+0xc1/0x1d0 [ 13.932489][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.932644][ T11] [ 13.932706][ T11] Freed by task 11: [ 13.932799][ T11] kasan_save_stack+0x24/0x50 [ 13.932921][ T11] kasan_save_track+0x14/0x30 [ 13.933045][ T11] kasan_save_free_info+0x3b/0x60 [ 13.933174][ T11] __kasan_slab_free+0x38/0x50 [ 13.933294][ T11] kmem_cache_free+0xf8/0x330 [ 13.933414][ T11] cleanup_net+0x5a8/0xb90 [ 13.933535][ T11] process_one_work+0xe55/0x16d0 [ 13.933655][ T11] worker_thread+0x58c/0xce0 [ 13.933778][ T11] kthread+0x28a/0x350 [ 13.933873][ T11] ret_from_fork+0x31/0x70 [ 13.933991][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.934116][ T11] [ 13.934178][ T11] Last potentially related work creation: [ 13.934298][ T11] kasan_save_stack+0x24/0x50 [ 13.934421][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.934547][ T11] insert_work+0x34/0x230 [ 13.934638][ T11] __queue_work+0x5fd/0xa40 [ 13.934759][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.934882][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.935010][ T11] inetdev_event+0xb18/0xcf0 [ 13.935136][ T11] notifier_call_chain+0xcd/0x150 [ 13.935257][ T11] __dev_notify_flags+0xe6/0x250 [ 13.935379][ T11] dev_change_flags+0xec/0x160 [ 13.935503][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 13.935632][ T11] rtnl_newlink+0x6de/0xa80 [ 13.935756][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.935879][ T11] netlink_rcv_skb+0x130/0x360 [ 13.936009][ T11] netlink_unicast+0x44b/0x710 [ 13.936133][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.936253][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.936376][ T11] ___sys_sendmsg+0xee/0x170 [ 13.936504][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.936628][ T11] do_syscall_64+0xc1/0x1d0 [ 13.936750][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.936907][ T11] [ 13.936971][ T11] The buggy address belongs to the object at ffff888009b70040 [ 13.936971][ T11] which belongs to the cache net_namespace of size 6528 [ 13.937292][ T11] The buggy address is located 184 bytes inside of [ 13.937292][ T11] freed 6528-byte region [ffff888009b70040, ffff888009b719c0) [ 13.937598][ T11] [ 13.937660][ T11] The buggy address belongs to the physical page: [ 13.937807][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009b73640 pfn:0x9b70 [ 13.938057][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 13.938246][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 13.938403][ T11] page_type: f5(slab) [ 13.938502][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.938744][ T11] raw: ffff888009b73640 0000000000040002 00000001f5000000 0000000000000000 [ 13.938961][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.939178][ T11] head: ffff888009b73640 0000000000040002 00000001f5000000 0000000000000000 [ 13.939397][ T11] head: 0080000000000003 ffffea000026dc01 ffffffffffffffff 0000000000000000 [ 13.939612][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 13.939823][ T11] page dumped because: kasan: bad access detected [ 13.939979][ T11] [ 13.940045][ T11] Memory state around the buggy address: [ 13.940162][ T11] ffff888009b6ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.940349][ T11] ffff888009b70000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.940525][ T11] >ffff888009b70080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.940707][ T11] ^ [ 13.940884][ T11] ffff888009b70100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.941064][ T11] ffff888009b70180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.941242][ T11] ================================================================== [ 13.941471][ T11] Disabling lock debugging due to kernel taint