[ 24.493255][ T382] netem: version 1.3 [ 45.211536][ T784] mptcp_connect (784) used greatest stack depth: 24152 bytes left [ 72.163246][ T1229] mptcp_connect (1229) used greatest stack depth: 23592 bytes left [ 316.770792][ T66] ================================================================== [ 316.771052][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 316.771269][ T66] Read of size 8 at addr ffff88800a67e5f8 by task kworker/u16:1/66 [ 316.771483][ T66] [ 316.771561][ T66] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 316.771783][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 316.771963][ T66] Workqueue: netns cleanup_net [ 316.772116][ T66] Call Trace: [ 316.772229][ T66] [ 316.772302][ T66] dump_stack_lvl+0x82/0xd0 [ 316.772455][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 316.772637][ T66] ? cleanup_net+0x932/0xa40 [ 316.772786][ T66] print_report+0xb4/0x270 [ 316.772936][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 316.773080][ T66] kasan_report+0xbd/0xf0 [ 316.773193][ T66] ? cleanup_net+0x932/0xa40 [ 316.773341][ T66] cleanup_net+0x932/0xa40 [ 316.773483][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 316.773644][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 316.773789][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 316.773939][ T66] ? lock_acquire+0x32/0xc0 [ 316.774081][ T66] ? process_one_work+0xe0b/0x16d0 [ 316.774235][ T66] process_one_work+0xe55/0x16d0 [ 316.774383][ T66] ? __pfx___lock_release+0x10/0x10 [ 316.774529][ T66] ? __pfx_process_one_work+0x10/0x10 [ 316.774677][ T66] ? assign_work+0x16c/0x240 [ 316.774826][ T66] worker_thread+0x58c/0xce0 [ 316.774970][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 316.775153][ T66] ? __pfx_worker_thread+0x10/0x10 [ 316.775301][ T66] ? __pfx_worker_thread+0x10/0x10 [ 316.775446][ T66] kthread+0x28a/0x350 [ 316.775563][ T66] ? __pfx_kthread+0x10/0x10 [ 316.775712][ T66] ret_from_fork+0x31/0x70 [ 316.775854][ T66] ? __pfx_kthread+0x10/0x10 [ 316.776002][ T66] ret_from_fork_asm+0x1a/0x30 [ 316.776156][ T66] [ 316.776269][ T66] [ 316.776344][ T66] Allocated by task 313: [ 316.776454][ T66] kasan_save_stack+0x24/0x50 [ 316.776600][ T66] kasan_save_track+0x14/0x30 [ 316.776746][ T66] __kasan_slab_alloc+0x59/0x70 [ 316.776892][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 316.777050][ T66] copy_net_ns+0xc6/0x340 [ 316.777163][ T66] create_new_namespaces+0x35f/0x920 [ 316.777311][ T66] unshare_nsproxy_namespaces+0x8d/0x130 [ 316.777455][ T66] ksys_unshare+0x2a9/0x660 [ 316.777605][ T66] __x64_sys_unshare+0x31/0x40 [ 316.777754][ T66] do_syscall_64+0xc1/0x1d0 [ 316.777903][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 316.778088][ T66] [ 316.778163][ T66] Freed by task 66: [ 316.778274][ T66] kasan_save_stack+0x24/0x50 [ 316.778422][ T66] kasan_save_track+0x14/0x30 [ 316.778576][ T66] kasan_save_free_info+0x3b/0x60 [ 316.778728][ T66] __kasan_slab_free+0x38/0x50 [ 316.778887][ T66] kmem_cache_free+0xf8/0x330 [ 316.779035][ T66] cleanup_net+0x5a8/0xa40 [ 316.779176][ T66] process_one_work+0xe55/0x16d0 [ 316.779323][ T66] worker_thread+0x58c/0xce0 [ 316.779467][ T66] kthread+0x28a/0x350 [ 316.779576][ T66] ret_from_fork+0x31/0x70 [ 316.779721][ T66] ret_from_fork_asm+0x1a/0x30 [ 316.779866][ T66] [ 316.779940][ T66] Last potentially related work creation: [ 316.780091][ T66] kasan_save_stack+0x24/0x50 [ 316.780244][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 316.780389][ T66] insert_work+0x34/0x230 [ 316.780498][ T66] __queue_work+0x5fd/0xa40 [ 316.780662][ T66] queue_delayed_work_on+0x8c/0xa0 [ 316.780806][ T66] __inet_insert_ifa+0x751/0xb10 [ 316.780958][ T66] inetdev_event+0xb18/0xcf0 [ 316.781123][ T66] notifier_call_chain+0xcd/0x150 [ 316.781276][ T66] __dev_notify_flags+0xe6/0x250 [ 316.781427][ T66] dev_change_flags+0xec/0x160 [ 316.781581][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 316.781734][ T66] rtnl_newlink+0x6de/0xa80 [ 316.781880][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 316.782029][ T66] netlink_rcv_skb+0x130/0x360 [ 316.782176][ T66] netlink_unicast+0x44b/0x710 [ 316.782333][ T66] netlink_sendmsg+0x723/0xbe0 [ 316.782474][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 316.782621][ T66] ___sys_sendmsg+0xee/0x170 [ 316.782767][ T66] __sys_sendmsg+0x109/0x1a0 [ 316.782912][ T66] do_syscall_64+0xc1/0x1d0 [ 316.783068][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 316.783245][ T66] [ 316.783323][ T66] The buggy address belongs to the object at ffff88800a67e540 [ 316.783323][ T66] which belongs to the cache net_namespace of size 6080 [ 316.783706][ T66] The buggy address is located 184 bytes inside of [ 316.783706][ T66] freed 6080-byte region [ffff88800a67e540, ffff88800a67fd00) [ 316.784060][ T66] [ 316.784128][ T66] The buggy address belongs to the physical page: [ 316.784306][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa678 [ 316.784566][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 316.784788][ T66] flags: 0x80000000000040(head|node=0|zone=1) [ 316.784975][ T66] page_type: f5(slab) [ 316.785088][ T66] raw: 0080000000000040 ffff888001927240 ffff88800192c0a8 ffff88800192c0a8 [ 316.785345][ T66] raw: 0000000000000000 0000000000050005 00000001f5000000 0000000000000000 [ 316.785814][ T66] head: 0080000000000040 ffff888001927240 ffff88800192c0a8 ffff88800192c0a8 [ 316.786069][ T66] head: 0000000000000000 0000000000050005 00000001f5000000 0000000000000000 [ 316.786320][ T66] head: 0080000000000003 ffffea0000299e01 ffffffffffffffff 0000000000000000 [ 316.786575][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 316.786831][ T66] page dumped because: kasan: bad access detected [ 316.787137][ T66] [ 316.787214][ T66] Memory state around the buggy address: [ 316.787352][ T66] ffff88800a67e480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 316.787566][ T66] ffff88800a67e500: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 316.787772][ T66] >ffff88800a67e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 316.787986][ T66] ^ [ 316.788200][ T66] ffff88800a67e600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 316.788412][ T66] ffff88800a67e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 316.788621][ T66] ================================================================== [ 316.788850][ T66] Disabling lock debugging due to kernel taint