[ 13.794652][ T261] ip (261) used greatest stack depth: 24072 bytes left [ 31.687146][ T67] ================================================================== [ 31.687403][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 31.687620][ T67] Read of size 8 at addr ffff8880094080f8 by task kworker/u16:1/67 [ 31.687828][ T67] [ 31.687901][ T67] CPU: 1 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 31.688115][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 31.688292][ T67] Workqueue: netns cleanup_net [ 31.688439][ T67] Call Trace: [ 31.688546][ T67] [ 31.688619][ T67] dump_stack_lvl+0x82/0xd0 [ 31.688774][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 31.688951][ T67] ? cleanup_net+0x932/0xa40 [ 31.689092][ T67] print_report+0xb4/0x270 [ 31.689238][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 31.689384][ T67] kasan_report+0xbd/0xf0 [ 31.689493][ T67] ? cleanup_net+0x932/0xa40 [ 31.689635][ T67] cleanup_net+0x932/0xa40 [ 31.689777][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 31.689927][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 31.690064][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 31.690210][ T67] ? lock_acquire+0x32/0xc0 [ 31.690352][ T67] ? process_one_work+0xe0b/0x16d0 [ 31.690503][ T67] process_one_work+0xe55/0x16d0 [ 31.690646][ T67] ? __pfx___lock_release+0x10/0x10 [ 31.690785][ T67] ? __pfx_process_one_work+0x10/0x10 [ 31.690926][ T67] ? assign_work+0x16c/0x240 [ 31.691071][ T67] worker_thread+0x58c/0xce0 [ 31.691209][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 31.691387][ T67] ? __pfx_worker_thread+0x10/0x10 [ 31.691533][ T67] ? __pfx_worker_thread+0x10/0x10 [ 31.691673][ T67] kthread+0x28a/0x350 [ 31.691783][ T67] ? __pfx_kthread+0x10/0x10 [ 31.691924][ T67] ret_from_fork+0x31/0x70 [ 31.692063][ T67] ? __pfx_kthread+0x10/0x10 [ 31.692210][ T67] ret_from_fork_asm+0x1a/0x30 [ 31.692356][ T67] [ 31.692465][ T67] [ 31.692538][ T67] Allocated by task 250: [ 31.692645][ T67] kasan_save_stack+0x24/0x50 [ 31.692788][ T67] kasan_save_track+0x14/0x30 [ 31.692926][ T67] __kasan_slab_alloc+0x59/0x70 [ 31.693064][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 31.693210][ T67] copy_net_ns+0xc6/0x340 [ 31.693317][ T67] create_new_namespaces+0x35f/0x920 [ 31.693457][ T67] unshare_nsproxy_namespaces+0x8d/0x130 [ 31.693596][ T67] ksys_unshare+0x2a9/0x660 [ 31.693754][ T67] __x64_sys_unshare+0x31/0x40 [ 31.693894][ T67] do_syscall_64+0xc1/0x1d0 [ 31.694036][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 31.694208][ T67] [ 31.694278][ T67] Freed by task 67: [ 31.694382][ T67] kasan_save_stack+0x24/0x50 [ 31.694525][ T67] kasan_save_track+0x14/0x30 [ 31.694661][ T67] kasan_save_free_info+0x3b/0x60 [ 31.694801][ T67] __kasan_slab_free+0x38/0x50 [ 31.694939][ T67] kmem_cache_free+0xf8/0x330 [ 31.695078][ T67] cleanup_net+0x5a8/0xa40 [ 31.695217][ T67] process_one_work+0xe55/0x16d0 [ 31.695359][ T67] worker_thread+0x58c/0xce0 [ 31.695496][ T67] kthread+0x28a/0x350 [ 31.695602][ T67] ret_from_fork+0x31/0x70 [ 31.695738][ T67] ret_from_fork_asm+0x1a/0x30 [ 31.695877][ T67] [ 31.695948][ T67] Last potentially related work creation: [ 31.696087][ T67] kasan_save_stack+0x24/0x50 [ 31.696228][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 31.696368][ T67] insert_work+0x34/0x230 [ 31.696473][ T67] __queue_work+0x5fd/0xa40 [ 31.696611][ T67] queue_delayed_work_on+0x8c/0xa0 [ 31.696750][ T67] __inet_insert_ifa+0x751/0xb10 [ 31.696891][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 31.697035][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 31.697179][ T67] netlink_rcv_skb+0x130/0x360 [ 31.697321][ T67] netlink_unicast+0x44b/0x710 [ 31.697462][ T67] netlink_sendmsg+0x723/0xbe0 [ 31.697600][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 31.697742][ T67] ___sys_sendmsg+0xee/0x170 [ 31.697885][ T67] __sys_sendmsg+0x109/0x1a0 [ 31.698022][ T67] do_syscall_64+0xc1/0x1d0 [ 31.698162][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 31.698336][ T67] [ 31.698407][ T67] Second to last potentially related work creation: [ 31.698579][ T67] kasan_save_stack+0x24/0x50 [ 31.698720][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 31.698862][ T67] insert_work+0x34/0x230 [ 31.698969][ T67] __queue_work+0x5fd/0xa40 [ 31.699108][ T67] queue_delayed_work_on+0x8c/0xa0 [ 31.699249][ T67] __inet_insert_ifa+0x751/0xb10 [ 31.699388][ T67] inetdev_event+0xb18/0xcf0 [ 31.699533][ T67] notifier_call_chain+0xcd/0x150 [ 31.699673][ T67] __dev_notify_flags+0xe6/0x250 [ 31.699816][ T67] dev_change_flags+0xec/0x160 [ 31.699955][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 31.700097][ T67] rtnl_newlink+0x6de/0xa80 [ 31.700236][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 31.700376][ T67] netlink_rcv_skb+0x130/0x360 [ 31.700518][ T67] netlink_unicast+0x44b/0x710 [ 31.700659][ T67] netlink_sendmsg+0x723/0xbe0 [ 31.700797][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 31.700937][ T67] ___sys_sendmsg+0xee/0x170 [ 31.701076][ T67] __sys_sendmsg+0x109/0x1a0 [ 31.701213][ T67] do_syscall_64+0xc1/0x1d0 [ 31.701351][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 31.701522][ T67] [ 31.701593][ T67] The buggy address belongs to the object at ffff888009408040 [ 31.701593][ T67] which belongs to the cache net_namespace of size 6592 [ 31.701966][ T67] The buggy address is located 184 bytes inside of [ 31.701966][ T67] freed 6592-byte region [ffff888009408040, ffff888009409a00) [ 31.702301][ T67] [ 31.702372][ T67] The buggy address belongs to the physical page: [ 31.702539][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9408 [ 31.702787][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 31.702994][ T67] flags: 0x80000000000040(head|node=0|zone=1) [ 31.703170][ T67] page_type: f5(slab) [ 31.703280][ T67] raw: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 31.703532][ T67] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 31.703778][ T67] head: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 31.704023][ T67] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 31.704268][ T67] head: 0080000000000003 ffffea0000250201 ffffffffffffffff 0000000000000000 [ 31.704510][ T67] head: ffff888000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 31.704754][ T67] page dumped because: kasan: bad access detected [ 31.704924][ T67] [ 31.704994][ T67] Memory state around the buggy address: [ 31.705128][ T67] ffff888009407f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 31.705333][ T67] ffff888009408000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.705552][ T67] >ffff888009408080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.705753][ T67] ^ [ 31.705955][ T67] ffff888009408100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.706157][ T67] ffff888009408180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.706357][ T67] ================================================================== [ 31.706621][ T67] Disabling lock debugging due to kernel taint