[ 18.478504][ T67] ================================================================== [ 18.478748][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 18.478943][ T67] Read of size 8 at addr ffff8880053980f8 by task kworker/u16:1/67 [ 18.479134][ T67] [ 18.479199][ T67] CPU: 2 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 18.479395][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 18.479555][ T67] Workqueue: netns cleanup_net [ 18.479687][ T67] Call Trace: [ 18.479788][ T67] [ 18.479856][ T67] dump_stack_lvl+0x82/0xd0 [ 18.479993][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 18.480154][ T67] ? cleanup_net+0x932/0xa40 [ 18.480282][ T67] print_report+0xb4/0x270 [ 18.480408][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 18.480532][ T67] kasan_report+0xbd/0xf0 [ 18.480628][ T67] ? cleanup_net+0x932/0xa40 [ 18.480756][ T67] cleanup_net+0x932/0xa40 [ 18.480881][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 18.481014][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 18.481140][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 18.481318][ T67] ? lock_acquire+0x32/0xc0 [ 18.481456][ T67] ? process_one_work+0xe0b/0x16d0 [ 18.481598][ T67] process_one_work+0xe55/0x16d0 [ 18.481739][ T67] ? __pfx___lock_release+0x10/0x10 [ 18.481882][ T67] ? __pfx_process_one_work+0x10/0x10 [ 18.482031][ T67] ? assign_work+0x16c/0x240 [ 18.482173][ T67] worker_thread+0x58c/0xce0 [ 18.482316][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 18.482493][ T67] ? __pfx_worker_thread+0x10/0x10 [ 18.482633][ T67] ? __pfx_worker_thread+0x10/0x10 [ 18.482773][ T67] kthread+0x28a/0x350 [ 18.482879][ T67] ? __pfx_kthread+0x10/0x10 [ 18.483032][ T67] ret_from_fork+0x31/0x70 [ 18.483174][ T67] ? __pfx_kthread+0x10/0x10 [ 18.483313][ T67] ret_from_fork_asm+0x1a/0x30 [ 18.483459][ T67] [ 18.483568][ T67] [ 18.483640][ T67] Allocated by task 225: [ 18.483745][ T67] kasan_save_stack+0x24/0x50 [ 18.483895][ T67] kasan_save_track+0x14/0x30 [ 18.484054][ T67] __kasan_slab_alloc+0x59/0x70 [ 18.484193][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 18.484340][ T67] copy_net_ns+0xc6/0x340 [ 18.484449][ T67] create_new_namespaces+0x35f/0x920 [ 18.484600][ T67] unshare_nsproxy_namespaces+0x8d/0x130 [ 18.484729][ T67] ksys_unshare+0x2a9/0x660 [ 18.484857][ T67] __x64_sys_unshare+0x31/0x40 [ 18.484992][ T67] do_syscall_64+0xc1/0x1d0 [ 18.485121][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.485282][ T67] [ 18.485346][ T67] Freed by task 67: [ 18.485473][ T67] kasan_save_stack+0x24/0x50 [ 18.485653][ T67] kasan_save_track+0x14/0x30 [ 18.485823][ T67] kasan_save_free_info+0x3b/0x60 [ 18.486018][ T67] __kasan_slab_free+0x38/0x50 [ 18.486219][ T67] kmem_cache_free+0xf8/0x330 [ 18.486421][ T67] cleanup_net+0x5a8/0xa40 [ 18.486629][ T67] process_one_work+0xe55/0x16d0 [ 18.486829][ T67] worker_thread+0x58c/0xce0 [ 18.487031][ T67] kthread+0x28a/0x350 [ 18.487191][ T67] ret_from_fork+0x31/0x70 [ 18.487396][ T67] ret_from_fork_asm+0x1a/0x30 [ 18.487600][ T67] [ 18.487709][ T67] Last potentially related work creation: [ 18.487914][ T67] kasan_save_stack+0x24/0x50 [ 18.488130][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 18.488338][ T67] insert_work+0x34/0x230 [ 18.488491][ T67] __queue_work+0x5fd/0xa40 [ 18.488708][ T67] queue_delayed_work_on+0x8c/0xa0 [ 18.488925][ T67] __inet_insert_ifa+0x751/0xb10 [ 18.489147][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 18.489353][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 18.489564][ T67] netlink_rcv_skb+0x130/0x360 [ 18.489762][ T67] netlink_unicast+0x44b/0x710 [ 18.489970][ T67] netlink_sendmsg+0x723/0xbe0 [ 18.490180][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 18.490392][ T67] ___sys_sendmsg+0xee/0x170 [ 18.490606][ T67] __sys_sendmsg+0x109/0x1a0 [ 18.490811][ T67] do_syscall_64+0xc1/0x1d0 [ 18.491021][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.491279][ T67] [ 18.491390][ T67] The buggy address belongs to the object at ffff888005398040 [ 18.491390][ T67] which belongs to the cache net_namespace of size 5696 [ 18.491923][ T67] The buggy address is located 184 bytes inside of [ 18.491923][ T67] freed 5696-byte region [ffff888005398040, ffff888005399680) [ 18.492413][ T67] [ 18.492515][ T67] The buggy address belongs to the physical page: [ 18.492749][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800539afc0 pfn:0x5398 [ 18.493162][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 18.493475][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 18.493667][ T67] page_type: f5(slab) [ 18.493856][ T67] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 18.494122][ T67] raw: ffff88800539afc0 0000000000050002 00000001f5000000 0000000000000000 [ 18.494431][ T67] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 18.494677][ T67] head: ffff88800539afc0 0000000000050002 00000001f5000000 0000000000000000 [ 18.494923][ T67] head: 0080000000000003 ffffea000014e601 ffffffffffffffff 0000000000000000 [ 18.495242][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 18.495481][ T67] page dumped because: kasan: bad access detected [ 18.495715][ T67] [ 18.495784][ T67] Memory state around the buggy address: [ 18.495919][ T67] ffff888005397f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 18.496128][ T67] ffff888005398000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 18.496390][ T67] >ffff888005398080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.496589][ T67] ^ [ 18.496784][ T67] ffff888005398100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.497049][ T67] ffff888005398180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.497248][ T67] ================================================================== [ 18.497583][ T67] Disabling lock debugging due to kernel taint