[ 26.179627][ T11] ================================================================== [ 26.179883][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 26.180098][ T11] Read of size 8 at addr ffff888009b180f8 by task kworker/u16:0/11 [ 26.180298][ T11] [ 26.180370][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 26.180587][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 26.180759][ T11] Workqueue: netns cleanup_net [ 26.180903][ T11] Call Trace: [ 26.181011][ T11] [ 26.181085][ T11] dump_stack_lvl+0x82/0xd0 [ 26.181228][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 26.181401][ T11] ? cleanup_net+0x932/0xa40 [ 26.181541][ T11] print_report+0xb4/0x270 [ 26.181682][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 26.181817][ T11] kasan_report+0xbd/0xf0 [ 26.181920][ T11] ? cleanup_net+0x932/0xa40 [ 26.182058][ T11] cleanup_net+0x932/0xa40 [ 26.182193][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 26.182335][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 26.182469][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 26.182609][ T11] ? lock_acquire+0x32/0xc0 [ 26.182747][ T11] ? process_one_work+0xe0b/0x16d0 [ 26.182891][ T11] process_one_work+0xe55/0x16d0 [ 26.183031][ T11] ? __pfx___lock_release+0x10/0x10 [ 26.183169][ T11] ? __pfx_process_one_work+0x10/0x10 [ 26.183312][ T11] ? assign_work+0x16c/0x240 [ 26.183452][ T11] worker_thread+0x58c/0xce0 [ 26.183593][ T11] ? __pfx_worker_thread+0x10/0x10 [ 26.183736][ T11] kthread+0x28a/0x350 [ 26.183846][ T11] ? __pfx_kthread+0x10/0x10 [ 26.183983][ T11] ret_from_fork+0x31/0x70 [ 26.184120][ T11] ? __pfx_kthread+0x10/0x10 [ 26.184261][ T11] ret_from_fork_asm+0x1a/0x30 [ 26.184407][ T11] [ 26.184514][ T11] [ 26.184584][ T11] Allocated by task 249: [ 26.184694][ T11] kasan_save_stack+0x24/0x50 [ 26.184835][ T11] kasan_save_track+0x14/0x30 [ 26.184983][ T11] __kasan_slab_alloc+0x59/0x70 [ 26.185121][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 26.185259][ T11] copy_net_ns+0xc6/0x340 [ 26.185361][ T11] create_new_namespaces+0x35f/0x920 [ 26.185499][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 26.185636][ T11] ksys_unshare+0x2a9/0x660 [ 26.185773][ T11] __x64_sys_unshare+0x31/0x40 [ 26.185916][ T11] do_syscall_64+0xc1/0x1d0 [ 26.186058][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.186233][ T11] [ 26.186302][ T11] Freed by task 11: [ 26.186407][ T11] kasan_save_stack+0x24/0x50 [ 26.186544][ T11] kasan_save_track+0x14/0x30 [ 26.186682][ T11] kasan_save_free_info+0x3b/0x60 [ 26.186821][ T11] __kasan_slab_free+0x38/0x50 [ 26.186957][ T11] kmem_cache_free+0xf8/0x330 [ 26.187098][ T11] cleanup_net+0x5a8/0xa40 [ 26.187236][ T11] process_one_work+0xe55/0x16d0 [ 26.187374][ T11] worker_thread+0x58c/0xce0 [ 26.187512][ T11] kthread+0x28a/0x350 [ 26.187619][ T11] ret_from_fork+0x31/0x70 [ 26.187755][ T11] ret_from_fork_asm+0x1a/0x30 [ 26.187962][ T11] [ 26.188033][ T11] Last potentially related work creation: [ 26.188175][ T11] kasan_save_stack+0x24/0x50 [ 26.188318][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 26.188523][ T11] insert_work+0x34/0x230 [ 26.188628][ T11] __queue_work+0x5fd/0xa40 [ 26.188768][ T11] queue_delayed_work_on+0x8c/0xa0 [ 26.188910][ T11] __inet_insert_ifa+0x751/0xb10 [ 26.189050][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 26.189251][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 26.189400][ T11] netlink_rcv_skb+0x130/0x360 [ 26.189541][ T11] netlink_unicast+0x44b/0x710 [ 26.189682][ T11] netlink_sendmsg+0x723/0xbe0 [ 26.189882][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 26.190025][ T11] ___sys_sendmsg+0xee/0x170 [ 26.190165][ T11] __sys_sendmsg+0x109/0x1a0 [ 26.190304][ T11] do_syscall_64+0xc1/0x1d0 [ 26.190510][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.190686][ T11] [ 26.190761][ T11] Second to last potentially related work creation: [ 26.190933][ T11] kasan_save_stack+0x24/0x50 [ 26.191085][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 26.191225][ T11] insert_work+0x34/0x230 [ 26.191332][ T11] __queue_work+0x5fd/0xa40 [ 26.191478][ T11] queue_delayed_work_on+0x8c/0xa0 [ 26.191621][ T11] __inet_insert_ifa+0x751/0xb10 [ 26.191759][ T11] inetdev_event+0xb18/0xcf0 [ 26.191905][ T11] notifier_call_chain+0xcd/0x150 [ 26.192048][ T11] __dev_notify_flags+0xe6/0x250 [ 26.192188][ T11] dev_change_flags+0xec/0x160 [ 26.192328][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 26.192483][ T11] rtnl_newlink+0x6de/0xa80 [ 26.192623][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 26.192829][ T11] netlink_rcv_skb+0x130/0x360 [ 26.192966][ T11] netlink_unicast+0x44b/0x710 [ 26.193114][ T11] netlink_sendmsg+0x723/0xbe0 [ 26.193253][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 26.193392][ T11] ___sys_sendmsg+0xee/0x170 [ 26.193596][ T11] __sys_sendmsg+0x109/0x1a0 [ 26.193808][ T11] do_syscall_64+0xc1/0x1d0 [ 26.193948][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.194124][ T11] [ 26.194195][ T11] The buggy address belongs to the object at ffff888009b18040 [ 26.194195][ T11] which belongs to the cache net_namespace of size 6592 [ 26.194553][ T11] The buggy address is located 184 bytes inside of [ 26.194553][ T11] freed 6592-byte region [ffff888009b18040, ffff888009b19a00) [ 26.194886][ T11] [ 26.194959][ T11] The buggy address belongs to the physical page: [ 26.195124][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9b18 [ 26.195367][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 26.195569][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 26.195746][ T11] page_type: f5(slab) [ 26.195859][ T11] raw: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 26.196108][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 26.196357][ T11] head: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 26.196604][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 26.196849][ T11] head: 0080000000000003 ffffea000026c601 ffffffffffffffff 0000000000000000 [ 26.197088][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 26.197399][ T11] page dumped because: kasan: bad access detected [ 26.197568][ T11] [ 26.197637][ T11] Memory state around the buggy address: [ 26.197775][ T11] ffff888009b17f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.197982][ T11] ffff888009b18000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 26.198177][ T11] >ffff888009b18080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.198378][ T11] ^ [ 26.198637][ T11] ffff888009b18100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.198892][ T11] ffff888009b18180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.199093][ T11] ================================================================== [ 26.199315][ T11] Disabling lock debugging due to kernel taint