[ 11.957982][ T67] ================================================================== [ 11.958277][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 11.958510][ T67] Read of size 8 at addr ffff88800cb29bf8 by task kworker/u16:1/67 [ 11.958728][ T67] [ 11.958811][ T67] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 11.959041][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.959228][ T67] Workqueue: netns cleanup_net [ 11.959388][ T67] Call Trace: [ 11.959505][ T67] [ 11.959585][ T67] dump_stack_lvl+0x82/0xd0 [ 11.959745][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 11.959935][ T67] ? cleanup_net+0xa5d/0xb90 [ 11.960090][ T67] print_report+0xb4/0x270 [ 11.960238][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 11.960388][ T67] kasan_report+0xbd/0xf0 [ 11.960503][ T67] ? cleanup_net+0xa5d/0xb90 [ 11.960655][ T67] cleanup_net+0xa5d/0xb90 [ 11.960806][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.960963][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 11.961113][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 11.961265][ T67] ? lock_acquire+0x32/0xc0 [ 11.961415][ T67] ? process_one_work+0xe0b/0x16d0 [ 11.961571][ T67] process_one_work+0xe55/0x16d0 [ 11.961723][ T67] ? __pfx___lock_release+0x10/0x10 [ 11.961879][ T67] ? __pfx_process_one_work+0x10/0x10 [ 11.962029][ T67] ? assign_work+0x16c/0x240 [ 11.962180][ T67] worker_thread+0x58c/0xce0 [ 11.962328][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 11.962514][ T67] ? __pfx_worker_thread+0x10/0x10 [ 11.962666][ T67] ? __pfx_worker_thread+0x10/0x10 [ 11.962818][ T67] kthread+0x28a/0x350 [ 11.962933][ T67] ? __pfx_kthread+0x10/0x10 [ 11.963080][ T67] ret_from_fork+0x31/0x70 [ 11.963229][ T67] ? __pfx_kthread+0x10/0x10 [ 11.963379][ T67] ret_from_fork_asm+0x1a/0x30 [ 11.963533][ T67] [ 11.963646][ T67] [ 11.963719][ T67] Allocated by task 257: [ 11.963835][ T67] kasan_save_stack+0x24/0x50 [ 11.963990][ T67] kasan_save_track+0x14/0x30 [ 11.964138][ T67] __kasan_slab_alloc+0x59/0x70 [ 11.964290][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.964443][ T67] copy_net_ns+0xc6/0x540 [ 11.964557][ T67] create_new_namespaces+0x35f/0x920 [ 11.964710][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 11.964860][ T67] ksys_unshare+0x2c4/0x6e0 [ 11.965013][ T67] __x64_sys_unshare+0x31/0x40 [ 11.965162][ T67] do_syscall_64+0xc1/0x1d0 [ 11.965315][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.965503][ T67] [ 11.965574][ T67] Freed by task 67: [ 11.965689][ T67] kasan_save_stack+0x24/0x50 [ 11.965846][ T67] kasan_save_track+0x14/0x30 [ 11.965994][ T67] kasan_save_free_info+0x3b/0x60 [ 11.966144][ T67] __kasan_slab_free+0x38/0x50 [ 11.966294][ T67] kmem_cache_free+0xf8/0x330 [ 11.966449][ T67] cleanup_net+0x5a8/0xb90 [ 11.966609][ T67] process_one_work+0xe55/0x16d0 [ 11.966757][ T67] worker_thread+0x58c/0xce0 [ 11.966907][ T67] kthread+0x28a/0x350 [ 11.967027][ T67] ret_from_fork+0x31/0x70 [ 11.967175][ T67] ret_from_fork_asm+0x1a/0x30 [ 11.967322][ T67] [ 11.967398][ T67] Last potentially related work creation: [ 11.967545][ T67] kasan_save_stack+0x24/0x50 [ 11.967702][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 11.967859][ T67] insert_work+0x34/0x230 [ 11.967987][ T67] __queue_work+0x5fd/0xa40 [ 11.968144][ T67] queue_delayed_work_on+0x8c/0xa0 [ 11.968306][ T67] __inet_insert_ifa+0x751/0xb10 [ 11.968463][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 11.968619][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 11.968782][ T67] netlink_rcv_skb+0x130/0x360 [ 11.968941][ T67] netlink_unicast+0x44b/0x710 [ 11.969096][ T67] netlink_sendmsg+0x723/0xbe0 [ 11.969253][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 11.969416][ T67] ___sys_sendmsg+0xee/0x170 [ 11.969575][ T67] __sys_sendmsg+0x109/0x1a0 [ 11.969731][ T67] do_syscall_64+0xc1/0x1d0 [ 11.969887][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.970082][ T67] [ 11.970162][ T67] Second to last potentially related work creation: [ 11.970353][ T67] kasan_save_stack+0x24/0x50 [ 11.970510][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 11.970664][ T67] insert_work+0x34/0x230 [ 11.970782][ T67] __queue_work+0x5fd/0xa40 [ 11.970939][ T67] queue_delayed_work_on+0x8c/0xa0 [ 11.971091][ T67] __inet_insert_ifa+0x751/0xb10 [ 11.971247][ T67] inetdev_event+0xb18/0xcf0 [ 11.971404][ T67] notifier_call_chain+0xcd/0x150 [ 11.971560][ T67] __dev_notify_flags+0xe6/0x250 [ 11.971718][ T67] dev_change_flags+0xec/0x160 [ 11.971873][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 11.972030][ T67] rtnl_newlink+0x6de/0xa80 [ 11.972186][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 11.972338][ T67] netlink_rcv_skb+0x130/0x360 [ 11.972490][ T67] netlink_unicast+0x44b/0x710 [ 11.972648][ T67] netlink_sendmsg+0x723/0xbe0 [ 11.972810][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 11.972962][ T67] ___sys_sendmsg+0xee/0x170 [ 11.973117][ T67] __sys_sendmsg+0x109/0x1a0 [ 11.973271][ T67] do_syscall_64+0xc1/0x1d0 [ 11.973424][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.973617][ T67] [ 11.973695][ T67] The buggy address belongs to the object at ffff88800cb29b40 [ 11.973695][ T67] which belongs to the cache net_namespace of size 6528 [ 11.974110][ T67] The buggy address is located 184 bytes inside of [ 11.974110][ T67] freed 6528-byte region [ffff88800cb29b40, ffff88800cb2b4c0) [ 11.974482][ T67] [ 11.974561][ T67] The buggy address belongs to the physical page: [ 11.974750][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800cb2b640 pfn:0xcb28 [ 11.975062][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.975295][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.975495][ T67] page_type: f5(slab) [ 11.975615][ T67] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.975890][ T67] raw: ffff88800cb2b640 0000000000040002 00000001f5000000 0000000000000000 [ 11.976158][ T67] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.976432][ T67] head: ffff88800cb2b640 0000000000040002 00000001f5000000 0000000000000000 [ 11.976700][ T67] head: 0080000000000003 ffffea000032ca01 ffffffffffffffff 0000000000000000 [ 11.976973][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.977248][ T67] page dumped because: kasan: bad access detected [ 11.977437][ T67] [ 11.977515][ T67] Memory state around the buggy address: [ 11.977662][ T67] ffff88800cb29a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.977884][ T67] ffff88800cb29b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.978104][ T67] >ffff88800cb29b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.978336][ T67] ^ [ 11.978555][ T67] ffff88800cb29c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.978777][ T67] ffff88800cb29c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.978999][ T67] ================================================================== [ 11.979250][ T67] Disabling lock debugging due to kernel taint