[ 40.795878][ T11] ================================================================== [ 40.796121][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 40.796342][ T11] Read of size 8 at addr ffff888004d700f8 by task kworker/u16:0/11 [ 40.796558][ T11] [ 40.796632][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 40.796842][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 40.797021][ T11] Workqueue: netns cleanup_net [ 40.797169][ T11] Call Trace: [ 40.797273][ T11] [ 40.797348][ T11] dump_stack_lvl+0x82/0xd0 [ 40.797495][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 40.797679][ T11] ? cleanup_net+0x932/0xa40 [ 40.797824][ T11] print_report+0xb4/0x270 [ 40.797965][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 40.798103][ T11] kasan_report+0xbd/0xf0 [ 40.798220][ T11] ? cleanup_net+0x932/0xa40 [ 40.798357][ T11] cleanup_net+0x932/0xa40 [ 40.798492][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 40.798635][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 40.798773][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 40.798920][ T11] ? lock_acquire+0x32/0xc0 [ 40.799091][ T11] ? process_one_work+0xe0b/0x16d0 [ 40.799243][ T11] process_one_work+0xe55/0x16d0 [ 40.799381][ T11] ? __pfx___lock_release+0x10/0x10 [ 40.799519][ T11] ? __pfx_process_one_work+0x10/0x10 [ 40.799664][ T11] ? assign_work+0x16c/0x240 [ 40.799802][ T11] worker_thread+0x58c/0xce0 [ 40.799944][ T11] ? __pfx_worker_thread+0x10/0x10 [ 40.800083][ T11] kthread+0x28a/0x350 [ 40.800191][ T11] ? __pfx_kthread+0x10/0x10 [ 40.800329][ T11] ret_from_fork+0x31/0x70 [ 40.800484][ T11] ? __pfx_kthread+0x10/0x10 [ 40.800625][ T11] ret_from_fork_asm+0x1a/0x30 [ 40.800768][ T11] [ 40.800871][ T11] [ 40.800942][ T11] Allocated by task 251: [ 40.801056][ T11] kasan_save_stack+0x24/0x50 [ 40.801212][ T11] kasan_save_track+0x14/0x30 [ 40.801353][ T11] __kasan_slab_alloc+0x59/0x70 [ 40.801504][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 40.801643][ T11] copy_net_ns+0xc6/0x340 [ 40.801747][ T11] create_new_namespaces+0x35f/0x920 [ 40.801884][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 40.802018][ T11] ksys_unshare+0x2a9/0x660 [ 40.802164][ T11] __x64_sys_unshare+0x31/0x40 [ 40.802301][ T11] do_syscall_64+0xc1/0x1d0 [ 40.802448][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 40.802621][ T11] [ 40.802693][ T11] Freed by task 11: [ 40.802798][ T11] kasan_save_stack+0x24/0x50 [ 40.802944][ T11] kasan_save_track+0x14/0x30 [ 40.803080][ T11] kasan_save_free_info+0x3b/0x60 [ 40.803221][ T11] __kasan_slab_free+0x38/0x50 [ 40.803360][ T11] kmem_cache_free+0xf8/0x330 [ 40.803502][ T11] cleanup_net+0x5a8/0xa40 [ 40.803638][ T11] process_one_work+0xe55/0x16d0 [ 40.803776][ T11] worker_thread+0x58c/0xce0 [ 40.803913][ T11] kthread+0x28a/0x350 [ 40.804017][ T11] ret_from_fork+0x31/0x70 [ 40.804152][ T11] ret_from_fork_asm+0x1a/0x30 [ 40.804295][ T11] [ 40.804361][ T11] Last potentially related work creation: [ 40.804509][ T11] kasan_save_stack+0x24/0x50 [ 40.804667][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 40.804806][ T11] insert_work+0x34/0x230 [ 40.804924][ T11] __queue_work+0x5fd/0xa40 [ 40.805073][ T11] queue_delayed_work_on+0x8c/0xa0 [ 40.805212][ T11] __inet_insert_ifa+0x751/0xb10 [ 40.805354][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 40.805490][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 40.805630][ T11] netlink_rcv_skb+0x130/0x360 [ 40.805774][ T11] netlink_unicast+0x44b/0x710 [ 40.805918][ T11] netlink_sendmsg+0x723/0xbe0 [ 40.806059][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 40.806212][ T11] ___sys_sendmsg+0xee/0x170 [ 40.806357][ T11] __sys_sendmsg+0x109/0x1a0 [ 40.806496][ T11] do_syscall_64+0xc1/0x1d0 [ 40.806646][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 40.806819][ T11] [ 40.806893][ T11] Second to last potentially related work creation: [ 40.807062][ T11] kasan_save_stack+0x24/0x50 [ 40.807209][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 40.807346][ T11] insert_work+0x34/0x230 [ 40.807452][ T11] __queue_work+0x5fd/0xa40 [ 40.807601][ T11] queue_delayed_work_on+0x8c/0xa0 [ 40.807747][ T11] __inet_insert_ifa+0x751/0xb10 [ 40.807894][ T11] inetdev_event+0xb18/0xcf0 [ 40.808036][ T11] notifier_call_chain+0xcd/0x150 [ 40.808177][ T11] __dev_notify_flags+0xe6/0x250 [ 40.808319][ T11] dev_change_flags+0xec/0x160 [ 40.808460][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 40.808598][ T11] rtnl_newlink+0x6de/0xa80 [ 40.808746][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 40.808888][ T11] netlink_rcv_skb+0x130/0x360 [ 40.809030][ T11] netlink_unicast+0x44b/0x710 [ 40.809167][ T11] netlink_sendmsg+0x723/0xbe0 [ 40.809305][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 40.809442][ T11] ___sys_sendmsg+0xee/0x170 [ 40.809581][ T11] __sys_sendmsg+0x109/0x1a0 [ 40.809720][ T11] do_syscall_64+0xc1/0x1d0 [ 40.809855][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 40.810091][ T11] [ 40.810167][ T11] The buggy address belongs to the object at ffff888004d70040 [ 40.810167][ T11] which belongs to the cache net_namespace of size 6592 [ 40.810522][ T11] The buggy address is located 184 bytes inside of [ 40.810522][ T11] freed 6592-byte region [ffff888004d70040, ffff888004d71a00) [ 40.810904][ T11] [ 40.810975][ T11] The buggy address belongs to the physical page: [ 40.811141][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4d70 [ 40.811394][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 40.811597][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 40.811836][ T11] page_type: f5(slab) [ 40.811946][ T11] raw: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 40.812192][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 40.812436][ T11] head: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 40.812678][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 40.812919][ T11] head: 0080000000000003 ffffea0000135c01 ffffffffffffffff 0000000000000000 [ 40.813297][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 40.813539][ T11] page dumped because: kasan: bad access detected [ 40.813770][ T11] [ 40.813839][ T11] Memory state around the buggy address: [ 40.813971][ T11] ffff888004d6ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.814172][ T11] ffff888004d70000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.814375][ T11] >ffff888004d70080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.814571][ T11] ^ [ 40.814829][ T11] ffff888004d70100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.815024][ T11] ffff888004d70180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.815226][ T11] ================================================================== [ 40.815501][ T11] Disabling lock debugging due to kernel taint