[ 10.615034][ T262] ip (262) used greatest stack depth: 23632 bytes left [ 12.114184][ T67] ================================================================== [ 12.114417][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 12.114611][ T67] Read of size 8 at addr ffff8880028000f8 by task kworker/u16:1/67 [ 12.114797][ T67] [ 12.114862][ T67] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 12.115061][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 12.115228][ T67] Workqueue: netns cleanup_net [ 12.115359][ T67] Call Trace: [ 12.115453][ T67] [ 12.115522][ T67] dump_stack_lvl+0x82/0xd0 [ 12.115659][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 12.115818][ T67] ? cleanup_net+0xa5d/0xb90 [ 12.115950][ T67] print_report+0xb4/0x270 [ 12.116076][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 12.116201][ T67] kasan_report+0xbd/0xf0 [ 12.116295][ T67] ? cleanup_net+0xa5d/0xb90 [ 12.116424][ T67] cleanup_net+0xa5d/0xb90 [ 12.116548][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 12.116681][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 12.116820][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 12.116947][ T67] ? lock_acquire+0x32/0xc0 [ 12.117073][ T67] ? process_one_work+0xe0b/0x16d0 [ 12.117203][ T67] process_one_work+0xe55/0x16d0 [ 12.117333][ T67] ? __pfx___lock_release+0x10/0x10 [ 12.117461][ T67] ? __pfx_process_one_work+0x10/0x10 [ 12.117593][ T67] ? assign_work+0x16c/0x240 [ 12.117725][ T67] worker_thread+0x58c/0xce0 [ 12.117851][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 12.118006][ T67] ? __pfx_worker_thread+0x10/0x10 [ 12.118132][ T67] ? __pfx_worker_thread+0x10/0x10 [ 12.118257][ T67] kthread+0x28a/0x350 [ 12.118355][ T67] ? __pfx_kthread+0x10/0x10 [ 12.118479][ T67] ret_from_fork+0x31/0x70 [ 12.118602][ T67] ? __pfx_kthread+0x10/0x10 [ 12.118725][ T67] ret_from_fork_asm+0x1a/0x30 [ 12.118859][ T67] [ 12.118954][ T67] [ 12.119020][ T67] Allocated by task 257: [ 12.119123][ T67] kasan_save_stack+0x24/0x50 [ 12.119253][ T67] kasan_save_track+0x14/0x30 [ 12.119377][ T67] __kasan_slab_alloc+0x59/0x70 [ 12.119499][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 12.119626][ T67] copy_net_ns+0xc6/0x540 [ 12.119727][ T67] create_new_namespaces+0x35f/0x920 [ 12.119855][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 12.119990][ T67] ksys_unshare+0x2c4/0x6e0 [ 12.120118][ T67] __x64_sys_unshare+0x31/0x40 [ 12.120244][ T67] do_syscall_64+0xc1/0x1d0 [ 12.120375][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 12.120538][ T67] [ 12.120606][ T67] Freed by task 67: [ 12.120715][ T67] kasan_save_stack+0x24/0x50 [ 12.120844][ T67] kasan_save_track+0x14/0x30 [ 12.120974][ T67] kasan_save_free_info+0x3b/0x60 [ 12.121112][ T67] __kasan_slab_free+0x38/0x50 [ 12.121242][ T67] kmem_cache_free+0xf8/0x330 [ 12.121371][ T67] cleanup_net+0x5a8/0xb90 [ 12.121499][ T67] process_one_work+0xe55/0x16d0 [ 12.121632][ T67] worker_thread+0x58c/0xce0 [ 12.121763][ T67] kthread+0x28a/0x350 [ 12.121866][ T67] ret_from_fork+0x31/0x70 [ 12.121995][ T67] ret_from_fork_asm+0x1a/0x30 [ 12.122124][ T67] [ 12.122195][ T67] Last potentially related work creation: [ 12.122327][ T67] kasan_save_stack+0x24/0x50 [ 12.122461][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 12.122595][ T67] insert_work+0x34/0x230 [ 12.122694][ T67] __queue_work+0x5fd/0xa40 [ 12.122827][ T67] queue_delayed_work_on+0x8c/0xa0 [ 12.122961][ T67] __inet_insert_ifa+0x751/0xb10 [ 12.123093][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 12.123223][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 12.123354][ T67] netlink_rcv_skb+0x130/0x360 [ 12.123481][ T67] netlink_unicast+0x44b/0x710 [ 12.123604][ T67] netlink_sendmsg+0x723/0xbe0 [ 12.123729][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 12.123858][ T67] ___sys_sendmsg+0xee/0x170 [ 12.123998][ T67] __sys_sendmsg+0x109/0x1a0 [ 12.124130][ T67] do_syscall_64+0xc1/0x1d0 [ 12.124252][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 12.124405][ T67] [ 12.124473][ T67] Second to last potentially related work creation: [ 12.124626][ T67] kasan_save_stack+0x24/0x50 [ 12.124752][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 12.124876][ T67] insert_work+0x34/0x230 [ 12.124972][ T67] __queue_work+0x5fd/0xa40 [ 12.125098][ T67] queue_delayed_work_on+0x8c/0xa0 [ 12.125220][ T67] __inet_insert_ifa+0x751/0xb10 [ 12.125344][ T67] inetdev_event+0xb18/0xcf0 [ 12.125471][ T67] notifier_call_chain+0xcd/0x150 [ 12.125601][ T67] __dev_notify_flags+0xe6/0x250 [ 12.125727][ T67] dev_change_flags+0xec/0x160 [ 12.125851][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 12.125977][ T67] rtnl_newlink+0x6de/0xa80 [ 12.126097][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 12.126218][ T67] netlink_rcv_skb+0x130/0x360 [ 12.126343][ T67] netlink_unicast+0x44b/0x710 [ 12.126467][ T67] netlink_sendmsg+0x723/0xbe0 [ 12.126591][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 12.126714][ T67] ___sys_sendmsg+0xee/0x170 [ 12.126840][ T67] __sys_sendmsg+0x109/0x1a0 [ 12.126966][ T67] do_syscall_64+0xc1/0x1d0 [ 12.127094][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 12.127250][ T67] [ 12.127312][ T67] The buggy address belongs to the object at ffff888002800040 [ 12.127312][ T67] which belongs to the cache net_namespace of size 6528 [ 12.127637][ T67] The buggy address is located 184 bytes inside of [ 12.127637][ T67] freed 6528-byte region [ffff888002800040, ffff8880028019c0) [ 12.127942][ T67] [ 12.128004][ T67] The buggy address belongs to the physical page: [ 12.128155][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888002803640 pfn:0x2800 [ 12.128404][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 12.128595][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 12.128758][ T67] page_type: f5(slab) [ 12.128856][ T67] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 12.129070][ T67] raw: ffff888002803640 0000000000040002 00000001f5000000 0000000000000000 [ 12.129287][ T67] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 12.129508][ T67] head: ffff888002803640 0000000000040002 00000001f5000000 0000000000000000 [ 12.129728][ T67] head: 0080000000000003 ffffea00000a0001 ffffffffffffffff 0000000000000000 [ 12.129942][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 12.130154][ T67] page dumped because: kasan: bad access detected [ 12.130304][ T67] [ 12.130368][ T67] Memory state around the buggy address: [ 12.130492][ T67] ffff8880027fff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.130673][ T67] ffff888002800000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 12.130850][ T67] >ffff888002800080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.131026][ T67] ^ [ 12.131199][ T67] ffff888002800100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.131378][ T67] ffff888002800180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.131550][ T67] ================================================================== [ 12.131752][ T67] Disabling lock debugging due to kernel taint