[ 15.461543][ T263] ip (263) used greatest stack depth: 23552 bytes left [ 128.379610][ T66] ================================================================== [ 128.379883][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 128.380097][ T66] Read of size 8 at addr ffff8880090580f8 by task kworker/u16:1/66 [ 128.380298][ T66] [ 128.380385][ T66] CPU: 2 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 128.380618][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 128.380791][ T66] Workqueue: netns cleanup_net [ 128.380943][ T66] Call Trace: [ 128.381060][ T66] [ 128.381136][ T66] dump_stack_lvl+0x82/0xd0 [ 128.381283][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 128.381460][ T66] ? cleanup_net+0x932/0xa40 [ 128.381597][ T66] print_report+0xb4/0x270 [ 128.381742][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 128.381887][ T66] kasan_report+0xbd/0xf0 [ 128.382000][ T66] ? cleanup_net+0x932/0xa40 [ 128.382143][ T66] cleanup_net+0x932/0xa40 [ 128.382285][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 128.382432][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 128.382570][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 128.382717][ T66] ? lock_acquire+0x32/0xc0 [ 128.382860][ T66] ? process_one_work+0xe0b/0x16d0 [ 128.383000][ T66] process_one_work+0xe55/0x16d0 [ 128.383149][ T66] ? __pfx___lock_release+0x10/0x10 [ 128.383297][ T66] ? __pfx_process_one_work+0x10/0x10 [ 128.383443][ T66] ? assign_work+0x16c/0x240 [ 128.383592][ T66] worker_thread+0x58c/0xce0 [ 128.383734][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 128.383922][ T66] ? __pfx_worker_thread+0x10/0x10 [ 128.384070][ T66] ? __pfx_worker_thread+0x10/0x10 [ 128.384215][ T66] kthread+0x28a/0x350 [ 128.384336][ T66] ? __pfx_kthread+0x10/0x10 [ 128.384469][ T66] ret_from_fork+0x31/0x70 [ 128.384605][ T66] ? __pfx_kthread+0x10/0x10 [ 128.384730][ T66] ret_from_fork_asm+0x1a/0x30 [ 128.384868][ T66] [ 128.384963][ T66] [ 128.385033][ T66] Allocated by task 251: [ 128.385133][ T66] kasan_save_stack+0x24/0x50 [ 128.385269][ T66] kasan_save_track+0x14/0x30 [ 128.385393][ T66] __kasan_slab_alloc+0x59/0x70 [ 128.385522][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 128.385656][ T66] copy_net_ns+0xc6/0x340 [ 128.385751][ T66] create_new_namespaces+0x35f/0x920 [ 128.385874][ T66] unshare_nsproxy_namespaces+0x8d/0x130 [ 128.386004][ T66] ksys_unshare+0x2a9/0x660 [ 128.386134][ T66] __x64_sys_unshare+0x31/0x40 [ 128.386258][ T66] do_syscall_64+0xc1/0x1d0 [ 128.386389][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 128.386559][ T66] [ 128.386623][ T66] Freed by task 66: [ 128.386717][ T66] kasan_save_stack+0x24/0x50 [ 128.386849][ T66] kasan_save_track+0x14/0x30 [ 128.386972][ T66] kasan_save_free_info+0x3b/0x60 [ 128.387105][ T66] __kasan_slab_free+0x38/0x50 [ 128.387234][ T66] kmem_cache_free+0xf8/0x330 [ 128.387357][ T66] cleanup_net+0x5a8/0xa40 [ 128.387483][ T66] process_one_work+0xe55/0x16d0 [ 128.387613][ T66] worker_thread+0x58c/0xce0 [ 128.387741][ T66] kthread+0x28a/0x350 [ 128.387837][ T66] ret_from_fork+0x31/0x70 [ 128.387960][ T66] ret_from_fork_asm+0x1a/0x30 [ 128.388088][ T66] [ 128.388156][ T66] Last potentially related work creation: [ 128.388275][ T66] kasan_save_stack+0x24/0x50 [ 128.388403][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 128.388569][ T66] insert_work+0x34/0x230 [ 128.388693][ T66] __queue_work+0x5fd/0xa40 [ 128.388846][ T66] queue_delayed_work_on+0x8c/0xa0 [ 128.388976][ T66] __inet_insert_ifa+0x751/0xb10 [ 128.389107][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 128.389235][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 128.389372][ T66] netlink_rcv_skb+0x130/0x360 [ 128.389508][ T66] netlink_unicast+0x44b/0x710 [ 128.389636][ T66] netlink_sendmsg+0x723/0xbe0 [ 128.389769][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 128.389901][ T66] ___sys_sendmsg+0xee/0x170 [ 128.390032][ T66] __sys_sendmsg+0x109/0x1a0 [ 128.390161][ T66] do_syscall_64+0xc1/0x1d0 [ 128.390284][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 128.390444][ T66] [ 128.390509][ T66] Second to last potentially related work creation: [ 128.390687][ T66] kasan_save_stack+0x24/0x50 [ 128.390830][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 128.390974][ T66] insert_work+0x34/0x230 [ 128.391080][ T66] __queue_work+0x5fd/0xa40 [ 128.391216][ T66] queue_delayed_work_on+0x8c/0xa0 [ 128.391353][ T66] __inet_insert_ifa+0x751/0xb10 [ 128.391493][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 128.391642][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 128.391779][ T66] netlink_rcv_skb+0x130/0x360 [ 128.391928][ T66] netlink_unicast+0x44b/0x710 [ 128.392066][ T66] netlink_sendmsg+0x723/0xbe0 [ 128.392202][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 128.392353][ T66] ___sys_sendmsg+0xee/0x170 [ 128.392492][ T66] __sys_sendmsg+0x109/0x1a0 [ 128.392631][ T66] do_syscall_64+0xc1/0x1d0 [ 128.392791][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 128.392964][ T66] [ 128.393034][ T66] The buggy address belongs to the object at ffff888009058040 [ 128.393034][ T66] which belongs to the cache net_namespace of size 6592 [ 128.393395][ T66] The buggy address is located 184 bytes inside of [ 128.393395][ T66] freed 6592-byte region [ffff888009058040, ffff888009059a00) [ 128.393729][ T66] [ 128.393799][ T66] The buggy address belongs to the physical page: [ 128.393963][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800905d200 pfn:0x9058 [ 128.394239][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 128.394461][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 128.394637][ T66] page_type: f5(slab) [ 128.394751][ T66] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 128.394999][ T66] raw: ffff88800905d200 0000000000040003 00000001f5000000 0000000000000000 [ 128.395238][ T66] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 128.395492][ T66] head: ffff88800905d200 0000000000040003 00000001f5000000 0000000000000000 [ 128.395761][ T66] head: 0080000000000003 ffffea0000241601 ffffffffffffffff 0000000000000000 [ 128.396058][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 128.396278][ T66] page dumped because: kasan: bad access detected [ 128.396434][ T66] [ 128.396495][ T66] Memory state around the buggy address: [ 128.396614][ T66] ffff888009057f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 128.396802][ T66] ffff888009058000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 128.396980][ T66] >ffff888009058080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 128.397161][ T66] ^ [ 128.397339][ T66] ffff888009058100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 128.397520][ T66] ffff888009058180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 128.397766][ T66] ================================================================== [ 128.398004][ T66] Disabling lock debugging due to kernel taint