[ 11.902955][ T65] ================================================================== [ 11.903183][ T65] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 11.903377][ T65] Read of size 8 at addr ffff88800b9900f8 by task kworker/u16:1/65 [ 11.903563][ T65] [ 11.903630][ T65] CPU: 0 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 11.903844][ T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.904008][ T65] Workqueue: netns cleanup_net [ 11.904144][ T65] Call Trace: [ 11.904240][ T65] [ 11.904311][ T65] dump_stack_lvl+0x82/0xd0 [ 11.904448][ T65] print_address_description.constprop.0+0x2c/0x3b0 [ 11.904615][ T65] ? cleanup_net+0xa5d/0xb90 [ 11.904748][ T65] print_report+0xb4/0x270 [ 11.904875][ T65] ? kasan_addr_to_slab+0x25/0x80 [ 11.905002][ T65] kasan_report+0xbd/0xf0 [ 11.905101][ T65] ? cleanup_net+0xa5d/0xb90 [ 11.905232][ T65] cleanup_net+0xa5d/0xb90 [ 11.905376][ T65] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.905512][ T65] ? __pfx_cleanup_net+0x10/0x10 [ 11.905640][ T65] ? trace_lock_acquire+0x148/0x1f0 [ 11.905768][ T65] ? lock_acquire+0x32/0xc0 [ 11.905900][ T65] ? process_one_work+0xe0b/0x16d0 [ 11.906029][ T65] process_one_work+0xe55/0x16d0 [ 11.906153][ T65] ? __pfx___lock_release+0x10/0x10 [ 11.906286][ T65] ? __pfx_process_one_work+0x10/0x10 [ 11.906418][ T65] ? assign_work+0x16c/0x240 [ 11.906545][ T65] worker_thread+0x58c/0xce0 [ 11.906671][ T65] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 11.906835][ T65] ? __pfx_worker_thread+0x10/0x10 [ 11.906962][ T65] ? __pfx_worker_thread+0x10/0x10 [ 11.907094][ T65] kthread+0x28a/0x350 [ 11.907196][ T65] ? __pfx_kthread+0x10/0x10 [ 11.907325][ T65] ret_from_fork+0x31/0x70 [ 11.907457][ T65] ? __pfx_kthread+0x10/0x10 [ 11.907587][ T65] ret_from_fork_asm+0x1a/0x30 [ 11.907724][ T65] [ 11.907822][ T65] [ 11.907891][ T65] Allocated by task 255: [ 11.907987][ T65] kasan_save_stack+0x24/0x50 [ 11.908120][ T65] kasan_save_track+0x14/0x30 [ 11.908248][ T65] __kasan_slab_alloc+0x59/0x70 [ 11.908379][ T65] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.908505][ T65] copy_net_ns+0xc6/0x540 [ 11.908602][ T65] create_new_namespaces+0x35f/0x920 [ 11.908728][ T65] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 11.908858][ T65] ksys_unshare+0x2c4/0x6e0 [ 11.909000][ T65] __x64_sys_unshare+0x31/0x40 [ 11.909127][ T65] do_syscall_64+0xc1/0x1d0 [ 11.909256][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.909420][ T65] [ 11.909492][ T65] Freed by task 65: [ 11.909588][ T65] kasan_save_stack+0x24/0x50 [ 11.909727][ T65] kasan_save_track+0x14/0x30 [ 11.909852][ T65] kasan_save_free_info+0x3b/0x60 [ 11.909974][ T65] __kasan_slab_free+0x38/0x50 [ 11.910103][ T65] kmem_cache_free+0xf8/0x330 [ 11.910225][ T65] cleanup_net+0x5a8/0xb90 [ 11.910351][ T65] process_one_work+0xe55/0x16d0 [ 11.910483][ T65] worker_thread+0x58c/0xce0 [ 11.910608][ T65] kthread+0x28a/0x350 [ 11.910707][ T65] ret_from_fork+0x31/0x70 [ 11.910830][ T65] ret_from_fork_asm+0x1a/0x30 [ 11.910959][ T65] [ 11.911027][ T65] Last potentially related work creation: [ 11.911155][ T65] kasan_save_stack+0x24/0x50 [ 11.911283][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 11.911407][ T65] insert_work+0x34/0x230 [ 11.911504][ T65] __queue_work+0x5fd/0xa40 [ 11.911632][ T65] queue_delayed_work_on+0x8c/0xa0 [ 11.911759][ T65] __inet_insert_ifa+0x751/0xb10 [ 11.911890][ T65] inet_rtm_newaddr+0x833/0xbd0 [ 11.912016][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 11.912146][ T65] netlink_rcv_skb+0x130/0x360 [ 11.912278][ T65] netlink_unicast+0x44b/0x710 [ 11.912404][ T65] netlink_sendmsg+0x723/0xbe0 [ 11.912534][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 11.912662][ T65] ___sys_sendmsg+0xee/0x170 [ 11.912784][ T65] __sys_sendmsg+0x109/0x1a0 [ 11.912917][ T65] do_syscall_64+0xc1/0x1d0 [ 11.913043][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.913204][ T65] [ 11.913280][ T65] Second to last potentially related work creation: [ 11.913432][ T65] kasan_save_stack+0x24/0x50 [ 11.913562][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 11.913693][ T65] insert_work+0x34/0x230 [ 11.913790][ T65] __queue_work+0x5fd/0xa40 [ 11.913922][ T65] queue_delayed_work_on+0x8c/0xa0 [ 11.914052][ T65] __inet_insert_ifa+0x751/0xb10 [ 11.914180][ T65] inetdev_event+0xb18/0xcf0 [ 11.914315][ T65] notifier_call_chain+0xcd/0x150 [ 11.914445][ T65] __dev_notify_flags+0xe6/0x250 [ 11.914577][ T65] dev_change_flags+0xec/0x160 [ 11.914705][ T65] do_setlink.constprop.0+0x79d/0x2300 [ 11.914834][ T65] rtnl_newlink+0x6de/0xa80 [ 11.914961][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 11.915092][ T65] netlink_rcv_skb+0x130/0x360 [ 11.915218][ T65] netlink_unicast+0x44b/0x710 [ 11.915352][ T65] netlink_sendmsg+0x723/0xbe0 [ 11.915482][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 11.915613][ T65] ___sys_sendmsg+0xee/0x170 [ 11.915738][ T65] __sys_sendmsg+0x109/0x1a0 [ 11.915866][ T65] do_syscall_64+0xc1/0x1d0 [ 11.915995][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.916156][ T65] [ 11.916228][ T65] The buggy address belongs to the object at ffff88800b990040 [ 11.916228][ T65] which belongs to the cache net_namespace of size 6528 [ 11.916555][ T65] The buggy address is located 184 bytes inside of [ 11.916555][ T65] freed 6528-byte region [ffff88800b990040, ffff88800b9919c0) [ 11.916870][ T65] [ 11.916937][ T65] The buggy address belongs to the physical page: [ 11.917103][ T65] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b993640 pfn:0xb990 [ 11.917373][ T65] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.917572][ T65] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.917743][ T65] page_type: f5(slab) [ 11.917840][ T65] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.918061][ T65] raw: ffff88800b993640 0000000000040002 00000001f5000000 0000000000000000 [ 11.918286][ T65] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.918520][ T65] head: ffff88800b993640 0000000000040002 00000001f5000000 0000000000000000 [ 11.918743][ T65] head: 0080000000000003 ffffea00002e6401 ffffffffffffffff 0000000000000000 [ 11.918966][ T65] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.919184][ T65] page dumped because: kasan: bad access detected [ 11.919344][ T65] [ 11.919409][ T65] Memory state around the buggy address: [ 11.919529][ T65] ffff88800b98ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.919711][ T65] ffff88800b990000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.919890][ T65] >ffff88800b990080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.920077][ T65] ^ [ 11.920268][ T65] ffff88800b990100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.920451][ T65] ffff88800b990180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.920634][ T65] ================================================================== [ 11.920840][ T65] Disabling lock debugging due to kernel taint