[ 13.141321][ T263] ip (263) used greatest stack depth: 23456 bytes left [ 40.243281][ T11] ================================================================== [ 40.243539][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 40.243751][ T11] Read of size 8 at addr ffff88800b8480f8 by task kworker/u16:0/11 [ 40.243951][ T11] [ 40.244021][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 40.244231][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 40.244401][ T11] Workqueue: netns cleanup_net [ 40.244543][ T11] Call Trace: [ 40.244647][ T11] [ 40.244723][ T11] dump_stack_lvl+0x82/0xd0 [ 40.244861][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 40.245028][ T11] ? cleanup_net+0x932/0xa40 [ 40.245166][ T11] print_report+0xb4/0x270 [ 40.245301][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 40.245435][ T11] kasan_report+0xbd/0xf0 [ 40.245542][ T11] ? cleanup_net+0x932/0xa40 [ 40.245679][ T11] cleanup_net+0x932/0xa40 [ 40.245813][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 40.245949][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 40.246081][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 40.246220][ T11] ? lock_acquire+0x32/0xc0 [ 40.246353][ T11] ? process_one_work+0xe0b/0x16d0 [ 40.246489][ T11] process_one_work+0xe55/0x16d0 [ 40.246623][ T11] ? __pfx___lock_release+0x10/0x10 [ 40.246755][ T11] ? __pfx_process_one_work+0x10/0x10 [ 40.246907][ T11] ? assign_work+0x16c/0x240 [ 40.247046][ T11] worker_thread+0x58c/0xce0 [ 40.247187][ T11] ? __pfx_worker_thread+0x10/0x10 [ 40.247327][ T11] kthread+0x28a/0x350 [ 40.247433][ T11] ? __pfx_kthread+0x10/0x10 [ 40.247577][ T11] ret_from_fork+0x31/0x70 [ 40.247717][ T11] ? __pfx_kthread+0x10/0x10 [ 40.247860][ T11] ret_from_fork_asm+0x1a/0x30 [ 40.248014][ T11] [ 40.248120][ T11] [ 40.248190][ T11] Allocated by task 249: [ 40.248315][ T11] kasan_save_stack+0x24/0x50 [ 40.248452][ T11] kasan_save_track+0x14/0x30 [ 40.248587][ T11] __kasan_slab_alloc+0x59/0x70 [ 40.248723][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 40.248861][ T11] copy_net_ns+0xc6/0x340 [ 40.248973][ T11] create_new_namespaces+0x35f/0x920 [ 40.249115][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 40.249258][ T11] ksys_unshare+0x2a9/0x660 [ 40.249402][ T11] __x64_sys_unshare+0x31/0x40 [ 40.249554][ T11] do_syscall_64+0xc1/0x1d0 [ 40.249698][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 40.249873][ T11] [ 40.249948][ T11] Freed by task 11: [ 40.250074][ T11] kasan_save_stack+0x24/0x50 [ 40.250218][ T11] kasan_save_track+0x14/0x30 [ 40.250366][ T11] kasan_save_free_info+0x3b/0x60 [ 40.250512][ T11] __kasan_slab_free+0x38/0x50 [ 40.250651][ T11] kmem_cache_free+0xf8/0x330 [ 40.250794][ T11] cleanup_net+0x5a8/0xa40 [ 40.250936][ T11] process_one_work+0xe55/0x16d0 [ 40.251080][ T11] worker_thread+0x58c/0xce0 [ 40.251225][ T11] kthread+0x28a/0x350 [ 40.251333][ T11] ret_from_fork+0x31/0x70 [ 40.251474][ T11] ret_from_fork_asm+0x1a/0x30 [ 40.251635][ T11] [ 40.251713][ T11] Last potentially related work creation: [ 40.251856][ T11] kasan_save_stack+0x24/0x50 [ 40.252000][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 40.252136][ T11] insert_work+0x34/0x230 [ 40.252244][ T11] __queue_work+0x5fd/0xa40 [ 40.252381][ T11] queue_delayed_work_on+0x8c/0xa0 [ 40.252540][ T11] __inet_insert_ifa+0x751/0xb10 [ 40.252684][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 40.252828][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 40.252974][ T11] netlink_rcv_skb+0x130/0x360 [ 40.253121][ T11] netlink_unicast+0x44b/0x710 [ 40.253266][ T11] netlink_sendmsg+0x723/0xbe0 [ 40.253416][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 40.253560][ T11] ___sys_sendmsg+0xee/0x170 [ 40.253709][ T11] __sys_sendmsg+0x109/0x1a0 [ 40.253866][ T11] do_syscall_64+0xc1/0x1d0 [ 40.254015][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 40.254187][ T11] [ 40.254259][ T11] Second to last potentially related work creation: [ 40.254436][ T11] kasan_save_stack+0x24/0x50 [ 40.254590][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 40.254737][ T11] insert_work+0x34/0x230 [ 40.254849][ T11] __queue_work+0x5fd/0xa40 [ 40.255002][ T11] queue_delayed_work_on+0x8c/0xa0 [ 40.255154][ T11] __inet_insert_ifa+0x751/0xb10 [ 40.255295][ T11] inetdev_event+0xb18/0xcf0 [ 40.255437][ T11] notifier_call_chain+0xcd/0x150 [ 40.255589][ T11] __dev_notify_flags+0xe6/0x250 [ 40.255729][ T11] dev_change_flags+0xec/0x160 [ 40.255866][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 40.256007][ T11] rtnl_newlink+0x6de/0xa80 [ 40.256165][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 40.256311][ T11] netlink_rcv_skb+0x130/0x360 [ 40.256452][ T11] netlink_unicast+0x44b/0x710 [ 40.256594][ T11] netlink_sendmsg+0x723/0xbe0 [ 40.256743][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 40.256888][ T11] ___sys_sendmsg+0xee/0x170 [ 40.257034][ T11] __sys_sendmsg+0x109/0x1a0 [ 40.257175][ T11] do_syscall_64+0xc1/0x1d0 [ 40.257391][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 40.257710][ T11] [ 40.257783][ T11] The buggy address belongs to the object at ffff88800b848040 [ 40.257783][ T11] which belongs to the cache net_namespace of size 6592 [ 40.258158][ T11] The buggy address is located 184 bytes inside of [ 40.258158][ T11] freed 6592-byte region [ffff88800b848040, ffff88800b849a00) [ 40.258600][ T11] [ 40.258676][ T11] The buggy address belongs to the physical page: [ 40.258853][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb848 [ 40.259110][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 40.259323][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 40.259512][ T11] page_type: f5(slab) [ 40.259629][ T11] raw: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 40.259951][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 40.260224][ T11] head: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 40.260474][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 40.260731][ T11] head: 0080000000000003 ffffea00002e1201 ffffffffffffffff 0000000000000000 [ 40.260983][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 40.261233][ T11] page dumped because: kasan: bad access detected [ 40.261401][ T11] [ 40.261471][ T11] Memory state around the buggy address: [ 40.261611][ T11] ffff88800b847f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.261816][ T11] ffff88800b848000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.262085][ T11] >ffff88800b848080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.262282][ T11] ^ [ 40.262488][ T11] ffff88800b848100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.262690][ T11] ffff88800b848180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.262957][ T11] ================================================================== [ 40.263358][ T11] Disabling lock debugging due to kernel taint