[ 13.105935][ T269] ip (269) used greatest stack depth: 24304 bytes left [ 98.428565][ T68] ================================================================== [ 98.428917][ T68] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 98.429195][ T68] Read of size 8 at addr ffff8880093980f8 by task kworker/u16:1/68 [ 98.429496][ T68] [ 98.429603][ T68] CPU: 2 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 98.429904][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 98.430159][ T68] Workqueue: netns cleanup_net [ 98.430384][ T68] Call Trace: [ 98.430542][ T68] [ 98.430652][ T68] dump_stack_lvl+0x82/0xd0 [ 98.430865][ T68] print_address_description.constprop.0+0x2c/0x3b0 [ 98.431137][ T68] ? cleanup_net+0xa5d/0xb90 [ 98.431356][ T68] print_report+0xb4/0x270 [ 98.431568][ T68] ? kasan_addr_to_slab+0x25/0x80 [ 98.431778][ T68] kasan_report+0xbd/0xf0 [ 98.431928][ T68] ? cleanup_net+0xa5d/0xb90 [ 98.432129][ T68] cleanup_net+0xa5d/0xb90 [ 98.432337][ T68] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 98.432562][ T68] ? __pfx_cleanup_net+0x10/0x10 [ 98.432771][ T68] ? trace_lock_acquire+0x148/0x1f0 [ 98.432985][ T68] ? lock_acquire+0x32/0xc0 [ 98.433192][ T68] ? process_one_work+0xe0b/0x16d0 [ 98.433405][ T68] process_one_work+0xe55/0x16d0 [ 98.433620][ T68] ? __pfx___lock_release+0x10/0x10 [ 98.433822][ T68] ? __pfx_process_one_work+0x10/0x10 [ 98.434033][ T68] ? assign_work+0x16c/0x240 [ 98.434278][ T68] worker_thread+0x58c/0xce0 [ 98.434485][ T68] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 98.434756][ T68] ? __pfx_worker_thread+0x10/0x10 [ 98.434962][ T68] ? __pfx_worker_thread+0x10/0x10 [ 98.435167][ T68] kthread+0x28a/0x350 [ 98.435324][ T68] ? __pfx_kthread+0x10/0x10 [ 98.435546][ T68] ret_from_fork+0x31/0x70 [ 98.435755][ T68] ? __pfx_kthread+0x10/0x10 [ 98.435962][ T68] ret_from_fork_asm+0x1a/0x30 [ 98.436178][ T68] [ 98.436353][ T68] [ 98.436463][ T68] Allocated by task 262: [ 98.436619][ T68] kasan_save_stack+0x24/0x50 [ 98.436833][ T68] kasan_save_track+0x14/0x30 [ 98.437033][ T68] __kasan_slab_alloc+0x59/0x70 [ 98.437227][ T68] kmem_cache_alloc_noprof+0x10b/0x350 [ 98.437421][ T68] copy_net_ns+0xc6/0x540 [ 98.437540][ T68] create_new_namespaces+0x35f/0x920 [ 98.437742][ T68] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 98.437941][ T68] ksys_unshare+0x2c4/0x6e0 [ 98.438140][ T68] __x64_sys_unshare+0x31/0x40 [ 98.438329][ T68] do_syscall_64+0xc1/0x1d0 [ 98.438533][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 98.438754][ T68] [ 98.438851][ T68] Freed by task 68: [ 98.439008][ T68] kasan_save_stack+0x24/0x50 [ 98.439207][ T68] kasan_save_track+0x14/0x30 [ 98.439417][ T68] kasan_save_free_info+0x3b/0x60 [ 98.439625][ T68] __kasan_slab_free+0x38/0x50 [ 98.439811][ T68] kmem_cache_free+0xf8/0x330 [ 98.439992][ T68] cleanup_net+0x5a8/0xb90 [ 98.440162][ T68] process_one_work+0xe55/0x16d0 [ 98.440344][ T68] worker_thread+0x58c/0xce0 [ 98.440549][ T68] kthread+0x28a/0x350 [ 98.440714][ T68] ret_from_fork+0x31/0x70 [ 98.440942][ T68] ret_from_fork_asm+0x1a/0x30 [ 98.441112][ T68] [ 98.441189][ T68] Last potentially related work creation: [ 98.441411][ T68] kasan_save_stack+0x24/0x50 [ 98.441617][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 98.441795][ T68] insert_work+0x34/0x230 [ 98.441941][ T68] __queue_work+0x5fd/0xa40 [ 98.442137][ T68] queue_delayed_work_on+0x8c/0xa0 [ 98.442302][ T68] __inet_insert_ifa+0x751/0xb10 [ 98.442456][ T68] inet_rtm_newaddr+0x833/0xbd0 [ 98.442612][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 98.442768][ T68] netlink_rcv_skb+0x130/0x360 [ 98.442935][ T68] netlink_unicast+0x44b/0x710 [ 98.443094][ T68] netlink_sendmsg+0x723/0xbe0 [ 98.443230][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 98.443380][ T68] ___sys_sendmsg+0xee/0x170 [ 98.443538][ T68] __sys_sendmsg+0x109/0x1a0 [ 98.443700][ T68] do_syscall_64+0xc1/0x1d0 [ 98.443857][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 98.444054][ T68] [ 98.444139][ T68] Second to last potentially related work creation: [ 98.444326][ T68] kasan_save_stack+0x24/0x50 [ 98.444491][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 98.444653][ T68] insert_work+0x34/0x230 [ 98.444767][ T68] __queue_work+0x5fd/0xa40 [ 98.444917][ T68] queue_delayed_work_on+0x8c/0xa0 [ 98.445075][ T68] __inet_insert_ifa+0x751/0xb10 [ 98.445243][ T68] inet_rtm_newaddr+0x833/0xbd0 [ 98.445409][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 98.445592][ T68] netlink_rcv_skb+0x130/0x360 [ 98.445745][ T68] netlink_unicast+0x44b/0x710 [ 98.445896][ T68] netlink_sendmsg+0x723/0xbe0 [ 98.446050][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 98.446187][ T68] ___sys_sendmsg+0xee/0x170 [ 98.446337][ T68] __sys_sendmsg+0x109/0x1a0 [ 98.446486][ T68] do_syscall_64+0xc1/0x1d0 [ 98.446638][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 98.446823][ T68] [ 98.446895][ T68] The buggy address belongs to the object at ffff888009398040 [ 98.446895][ T68] which belongs to the cache net_namespace of size 6528 [ 98.447273][ T68] The buggy address is located 184 bytes inside of [ 98.447273][ T68] freed 6528-byte region [ffff888009398040, ffff8880093999c0) [ 98.447636][ T68] [ 98.447705][ T68] The buggy address belongs to the physical page: [ 98.447883][ T68] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800939d140 pfn:0x9398 [ 98.448186][ T68] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 98.448408][ T68] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 98.448601][ T68] page_type: f5(slab) [ 98.448715][ T68] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 98.448994][ T68] raw: ffff88800939d140 0000000000040003 00000001f5000000 0000000000000000 [ 98.449249][ T68] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 98.449525][ T68] head: ffff88800939d140 0000000000040003 00000001f5000000 0000000000000000 [ 98.449758][ T68] head: 0080000000000003 ffffea000024e601 ffffffffffffffff 0000000000000000 [ 98.450002][ T68] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 98.450289][ T68] page dumped because: kasan: bad access detected [ 98.450576][ T68] [ 98.450655][ T68] Memory state around the buggy address: [ 98.450820][ T68] ffff888009397f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 98.451050][ T68] ffff888009398000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 98.451273][ T68] >ffff888009398080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 98.451504][ T68] ^ [ 98.451732][ T68] ffff888009398100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 98.451983][ T68] ffff888009398180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 98.452204][ T68] ================================================================== [ 98.452478][ T68] Disabling lock debugging due to kernel taint [ 157.408086][ T1396] mpls_gso: MPLS GSO support