[ 12.124892][ T266] ip (266) used greatest stack depth: 23152 bytes left [ 15.465060][ T306] netem: version 1.3 [ 128.128211][ T11] ================================================================== [ 128.128465][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 128.128662][ T11] Read of size 8 at addr ffff8880051d80f8 by task kworker/u16:0/11 [ 128.128860][ T11] [ 128.128925][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 128.129123][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 128.129312][ T11] Workqueue: netns cleanup_net [ 128.129457][ T11] Call Trace: [ 128.129562][ T11] [ 128.129655][ T11] dump_stack_lvl+0x82/0xd0 [ 128.129802][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 128.129974][ T11] ? cleanup_net+0x932/0xa40 [ 128.130121][ T11] print_report+0xb4/0x270 [ 128.130266][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 128.130393][ T11] kasan_report+0xbd/0xf0 [ 128.130490][ T11] ? cleanup_net+0x932/0xa40 [ 128.130637][ T11] cleanup_net+0x932/0xa40 [ 128.130790][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 128.130931][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 128.131058][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 128.131194][ T11] ? lock_acquire+0x32/0xc0 [ 128.131324][ T11] ? process_one_work+0xe0b/0x16d0 [ 128.131469][ T11] process_one_work+0xe55/0x16d0 [ 128.131620][ T11] ? __pfx___lock_release+0x10/0x10 [ 128.131746][ T11] ? __pfx_process_one_work+0x10/0x10 [ 128.131891][ T11] ? assign_work+0x16c/0x240 [ 128.132020][ T11] worker_thread+0x58c/0xce0 [ 128.132166][ T11] ? __pfx_worker_thread+0x10/0x10 [ 128.132291][ T11] kthread+0x28a/0x350 [ 128.132415][ T11] ? __pfx_kthread+0x10/0x10 [ 128.132565][ T11] ret_from_fork+0x31/0x70 [ 128.132706][ T11] ? __pfx_kthread+0x10/0x10 [ 128.132833][ T11] ret_from_fork_asm+0x1a/0x30 [ 128.132967][ T11] [ 128.133075][ T11] [ 128.133148][ T11] Allocated by task 246: [ 128.133275][ T11] kasan_save_stack+0x24/0x50 [ 128.133407][ T11] kasan_save_track+0x14/0x30 [ 128.133531][ T11] __kasan_slab_alloc+0x59/0x70 [ 128.133688][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 128.133821][ T11] copy_net_ns+0xc6/0x340 [ 128.133927][ T11] create_new_namespaces+0x35f/0x920 [ 128.134080][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 128.134218][ T11] ksys_unshare+0x2a9/0x660 [ 128.134349][ T11] __x64_sys_unshare+0x31/0x40 [ 128.134486][ T11] do_syscall_64+0xc1/0x1d0 [ 128.134627][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 128.134798][ T11] [ 128.134869][ T11] Freed by task 11: [ 128.134961][ T11] kasan_save_stack+0x24/0x50 [ 128.135106][ T11] kasan_save_track+0x14/0x30 [ 128.135262][ T11] kasan_save_free_info+0x3b/0x60 [ 128.135394][ T11] __kasan_slab_free+0x38/0x50 [ 128.135530][ T11] kmem_cache_free+0xf8/0x330 [ 128.135670][ T11] cleanup_net+0x5a8/0xa40 [ 128.135818][ T11] process_one_work+0xe55/0x16d0 [ 128.135960][ T11] worker_thread+0x58c/0xce0 [ 128.136111][ T11] kthread+0x28a/0x350 [ 128.136229][ T11] ret_from_fork+0x31/0x70 [ 128.136378][ T11] ret_from_fork_asm+0x1a/0x30 [ 128.136533][ T11] [ 128.136606][ T11] Last potentially related work creation: [ 128.136754][ T11] kasan_save_stack+0x24/0x50 [ 128.136906][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 128.137052][ T11] insert_work+0x34/0x230 [ 128.137160][ T11] __queue_work+0x5fd/0xa40 [ 128.137300][ T11] queue_delayed_work_on+0x8c/0xa0 [ 128.137425][ T11] __inet_insert_ifa+0x751/0xb10 [ 128.137554][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 128.137692][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 128.137825][ T11] netlink_rcv_skb+0x130/0x360 [ 128.137972][ T11] netlink_unicast+0x44b/0x710 [ 128.138113][ T11] netlink_sendmsg+0x723/0xbe0 [ 128.138244][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 128.138392][ T11] ___sys_sendmsg+0xee/0x170 [ 128.138534][ T11] __sys_sendmsg+0x109/0x1a0 [ 128.138671][ T11] do_syscall_64+0xc1/0x1d0 [ 128.138818][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 128.138998][ T11] [ 128.139070][ T11] Second to last potentially related work creation: [ 128.139252][ T11] kasan_save_stack+0x24/0x50 [ 128.139409][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 128.139551][ T11] insert_work+0x34/0x230 [ 128.139663][ T11] __queue_work+0x5fd/0xa40 [ 128.139814][ T11] queue_delayed_work_on+0x8c/0xa0 [ 128.139963][ T11] __inet_insert_ifa+0x751/0xb10 [ 128.140112][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 128.140258][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 128.140406][ T11] netlink_rcv_skb+0x130/0x360 [ 128.140555][ T11] netlink_unicast+0x44b/0x710 [ 128.140704][ T11] netlink_sendmsg+0x723/0xbe0 [ 128.140846][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 128.140989][ T11] ___sys_sendmsg+0xee/0x170 [ 128.141139][ T11] __sys_sendmsg+0x109/0x1a0 [ 128.141286][ T11] do_syscall_64+0xc1/0x1d0 [ 128.141429][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 128.141611][ T11] [ 128.141685][ T11] The buggy address belongs to the object at ffff8880051d8040 [ 128.141685][ T11] which belongs to the cache net_namespace of size 6080 [ 128.142085][ T11] The buggy address is located 184 bytes inside of [ 128.142085][ T11] freed 6080-byte region [ffff8880051d8040, ffff8880051d9800) [ 128.142450][ T11] [ 128.142530][ T11] The buggy address belongs to the physical page: [ 128.142704][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880051dcc00 pfn:0x51d8 [ 128.142979][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 128.143202][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 128.143363][ T11] page_type: f5(slab) [ 128.143464][ T11] raw: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 128.143715][ T11] raw: ffff8880051dcc00 0000000000050003 00000001f5000000 0000000000000000 [ 128.143940][ T11] head: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 128.144188][ T11] head: ffff8880051dcc00 0000000000050003 00000001f5000000 0000000000000000 [ 128.144430][ T11] head: 0080000000000003 ffffea0000147601 ffffffffffffffff 0000000000000000 [ 128.144734][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 128.144975][ T11] page dumped because: kasan: bad access detected [ 128.145145][ T11] [ 128.145223][ T11] Memory state around the buggy address: [ 128.145345][ T11] ffff8880051d7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 128.145527][ T11] ffff8880051d8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 128.145730][ T11] >ffff8880051d8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 128.145926][ T11] ^ [ 128.146122][ T11] ffff8880051d8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 128.146362][ T11] ffff8880051d8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 128.146549][ T11] ================================================================== [ 128.146817][ T11] Disabling lock debugging due to kernel taint