[ 15.045458][ T297] GACT probability NOT on [ 15.282130][ T301] drop_monitor: Initializing network drop monitor service [ 29.249698][ T66] ================================================================== [ 29.249930][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 29.250140][ T66] Read of size 8 at addr ffff88800bcf00f8 by task kworker/u16:1/66 [ 29.250339][ T66] [ 29.250410][ T66] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 29.250621][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 29.250798][ T66] Workqueue: netns cleanup_net [ 29.250944][ T66] Call Trace: [ 29.251050][ T66] [ 29.251122][ T66] dump_stack_lvl+0x82/0xd0 [ 29.251269][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 29.251448][ T66] ? cleanup_net+0xa5d/0xb90 [ 29.251595][ T66] print_report+0xb4/0x270 [ 29.251731][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 29.251874][ T66] kasan_report+0xbd/0xf0 [ 29.251981][ T66] ? cleanup_net+0xa5d/0xb90 [ 29.252123][ T66] cleanup_net+0xa5d/0xb90 [ 29.252275][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.252420][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 29.252570][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 29.252712][ T66] ? lock_acquire+0x32/0xc0 [ 29.252854][ T66] ? process_one_work+0xe0b/0x16d0 [ 29.252992][ T66] process_one_work+0xe55/0x16d0 [ 29.253134][ T66] ? __pfx___lock_release+0x10/0x10 [ 29.253280][ T66] ? __pfx_process_one_work+0x10/0x10 [ 29.253424][ T66] ? assign_work+0x16c/0x240 [ 29.253565][ T66] worker_thread+0x58c/0xce0 [ 29.253706][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 29.253882][ T66] ? __pfx_worker_thread+0x10/0x10 [ 29.254024][ T66] ? __pfx_worker_thread+0x10/0x10 [ 29.254162][ T66] kthread+0x28a/0x350 [ 29.254268][ T66] ? __pfx_kthread+0x10/0x10 [ 29.254407][ T66] ret_from_fork+0x31/0x70 [ 29.254545][ T66] ? __pfx_kthread+0x10/0x10 [ 29.254683][ T66] ret_from_fork_asm+0x1a/0x30 [ 29.254830][ T66] [ 29.254936][ T66] [ 29.255011][ T66] Allocated by task 268: [ 29.255117][ T66] kasan_save_stack+0x24/0x50 [ 29.255256][ T66] kasan_save_track+0x14/0x30 [ 29.255392][ T66] __kasan_slab_alloc+0x59/0x70 [ 29.255530][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 29.255677][ T66] copy_net_ns+0xc6/0x540 [ 29.255781][ T66] create_new_namespaces+0x35f/0x920 [ 29.255923][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 29.256063][ T66] ksys_unshare+0x2c4/0x6e0 [ 29.256207][ T66] __x64_sys_unshare+0x31/0x40 [ 29.256349][ T66] do_syscall_64+0xc1/0x1d0 [ 29.256490][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.256663][ T66] [ 29.256736][ T66] Freed by task 66: [ 29.256843][ T66] kasan_save_stack+0x24/0x50 [ 29.256983][ T66] kasan_save_track+0x14/0x30 [ 29.257122][ T66] kasan_save_free_info+0x3b/0x60 [ 29.257261][ T66] __kasan_slab_free+0x38/0x50 [ 29.257400][ T66] kmem_cache_free+0xf8/0x330 [ 29.257543][ T66] cleanup_net+0x5a8/0xb90 [ 29.257682][ T66] process_one_work+0xe55/0x16d0 [ 29.257825][ T66] worker_thread+0x58c/0xce0 [ 29.257963][ T66] kthread+0x28a/0x350 [ 29.258070][ T66] ret_from_fork+0x31/0x70 [ 29.258211][ T66] ret_from_fork_asm+0x1a/0x30 [ 29.258348][ T66] [ 29.258420][ T66] Last potentially related work creation: [ 29.258561][ T66] kasan_save_stack+0x24/0x50 [ 29.258703][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 29.258848][ T66] insert_work+0x34/0x230 [ 29.258955][ T66] __queue_work+0x5fd/0xa40 [ 29.259097][ T66] queue_delayed_work_on+0x8c/0xa0 [ 29.259241][ T66] __inet_insert_ifa+0x751/0xb10 [ 29.259382][ T66] inetdev_event+0xb18/0xcf0 [ 29.259520][ T66] notifier_call_chain+0xcd/0x150 [ 29.259665][ T66] __dev_notify_flags+0xe6/0x250 [ 29.259811][ T66] dev_change_flags+0xec/0x160 [ 29.259959][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 29.260099][ T66] rtnl_newlink+0x6de/0xa80 [ 29.260239][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 29.260382][ T66] netlink_rcv_skb+0x130/0x360 [ 29.260611][ T66] netlink_unicast+0x44b/0x710 [ 29.260753][ T66] netlink_sendmsg+0x723/0xbe0 [ 29.260894][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 29.261036][ T66] ___sys_sendmsg+0xee/0x170 [ 29.261173][ T66] __sys_sendmsg+0x109/0x1a0 [ 29.261314][ T66] do_syscall_64+0xc1/0x1d0 [ 29.261454][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.261626][ T66] [ 29.261698][ T66] The buggy address belongs to the object at ffff88800bcf0040 [ 29.261698][ T66] which belongs to the cache net_namespace of size 6528 [ 29.262067][ T66] The buggy address is located 184 bytes inside of [ 29.262067][ T66] freed 6528-byte region [ffff88800bcf0040, ffff88800bcf19c0) [ 29.262409][ T66] [ 29.262479][ T66] The buggy address belongs to the physical page: [ 29.262646][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800bcf3640 pfn:0xbcf0 [ 29.262927][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 29.263139][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 29.263313][ T66] page_type: f5(slab) [ 29.263425][ T66] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 29.263672][ T66] raw: ffff88800bcf3640 0000000000040002 00000001f5000000 0000000000000000 [ 29.263912][ T66] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 29.264154][ T66] head: ffff88800bcf3640 0000000000040002 00000001f5000000 0000000000000000 [ 29.264393][ T66] head: 0080000000000003 ffffea00002f3c01 ffffffffffffffff 0000000000000000 [ 29.264633][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 29.264873][ T66] page dumped because: kasan: bad access detected [ 29.265043][ T66] [ 29.265115][ T66] Memory state around the buggy address: [ 29.265249][ T66] ffff88800bceff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.265451][ T66] ffff88800bcf0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.265651][ T66] >ffff88800bcf0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.265856][ T66] ^ [ 29.266056][ T66] ffff88800bcf0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.266259][ T66] ffff88800bcf0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.266457][ T66] ================================================================== [ 29.266680][ T66] Disabling lock debugging due to kernel taint