[ 12.399677][ T267] ip (267) used greatest stack depth: 24224 bytes left [ 24.267193][ T380] netem: version 1.3 [ 70.282526][ T1228] mptcp_connect (1228) used greatest stack depth: 23680 bytes left [ 287.116585][ T11] ================================================================== [ 287.116868][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 287.117071][ T11] Read of size 8 at addr ffff8880126ee5f8 by task kworker/u16:0/11 [ 287.117252][ T11] [ 287.117317][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 287.117507][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 287.117666][ T11] Workqueue: netns cleanup_net [ 287.117796][ T11] Call Trace: [ 287.117888][ T11] [ 287.117952][ T11] dump_stack_lvl+0x82/0xd0 [ 287.118077][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 287.118237][ T11] ? cleanup_net+0x932/0xa40 [ 287.118415][ T11] print_report+0xb4/0x270 [ 287.118601][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 287.118730][ T11] kasan_report+0xbd/0xf0 [ 287.118827][ T11] ? cleanup_net+0x932/0xa40 [ 287.118954][ T11] cleanup_net+0x932/0xa40 [ 287.119077][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 287.119203][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 287.119329][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 287.119452][ T11] ? lock_acquire+0x32/0xc0 [ 287.119575][ T11] ? process_one_work+0xe0b/0x16d0 [ 287.119699][ T11] process_one_work+0xe55/0x16d0 [ 287.119825][ T11] ? __pfx___lock_release+0x10/0x10 [ 287.119949][ T11] ? __pfx_process_one_work+0x10/0x10 [ 287.120074][ T11] ? assign_work+0x16c/0x240 [ 287.120196][ T11] worker_thread+0x58c/0xce0 [ 287.120325][ T11] ? __pfx_worker_thread+0x10/0x10 [ 287.120444][ T11] kthread+0x28a/0x350 [ 287.120538][ T11] ? __pfx_kthread+0x10/0x10 [ 287.120659][ T11] ret_from_fork+0x31/0x70 [ 287.120782][ T11] ? __pfx_kthread+0x10/0x10 [ 287.120905][ T11] ret_from_fork_asm+0x1a/0x30 [ 287.121034][ T11] [ 287.121128][ T11] [ 287.121191][ T11] Allocated by task 310: [ 287.121287][ T11] kasan_save_stack+0x24/0x50 [ 287.121413][ T11] kasan_save_track+0x14/0x30 [ 287.121532][ T11] __kasan_slab_alloc+0x59/0x70 [ 287.121653][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 287.121777][ T11] copy_net_ns+0xc6/0x340 [ 287.121872][ T11] create_new_namespaces+0x35f/0x920 [ 287.121997][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 287.122123][ T11] ksys_unshare+0x2a9/0x660 [ 287.122248][ T11] __x64_sys_unshare+0x31/0x40 [ 287.122371][ T11] do_syscall_64+0xc1/0x1d0 [ 287.122497][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.122647][ T11] [ 287.122716][ T11] Freed by task 11: [ 287.122807][ T11] kasan_save_stack+0x24/0x50 [ 287.122929][ T11] kasan_save_track+0x14/0x30 [ 287.123048][ T11] kasan_save_free_info+0x3b/0x60 [ 287.123169][ T11] __kasan_slab_free+0x38/0x50 [ 287.123291][ T11] kmem_cache_free+0xf8/0x330 [ 287.123413][ T11] cleanup_net+0x5a8/0xa40 [ 287.123534][ T11] process_one_work+0xe55/0x16d0 [ 287.123660][ T11] worker_thread+0x58c/0xce0 [ 287.123782][ T11] kthread+0x28a/0x350 [ 287.123874][ T11] ret_from_fork+0x31/0x70 [ 287.123996][ T11] ret_from_fork_asm+0x1a/0x30 [ 287.124122][ T11] [ 287.124184][ T11] Last potentially related work creation: [ 287.124308][ T11] kasan_save_stack+0x24/0x50 [ 287.124431][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 287.124559][ T11] insert_work+0x34/0x230 [ 287.124653][ T11] __queue_work+0x5fd/0xa40 [ 287.124775][ T11] queue_delayed_work_on+0x8c/0xa0 [ 287.124897][ T11] __inet_insert_ifa+0x751/0xb10 [ 287.125023][ T11] inetdev_event+0xb18/0xcf0 [ 287.125145][ T11] notifier_call_chain+0xcd/0x150 [ 287.125269][ T11] __dev_notify_flags+0xe6/0x250 [ 287.125394][ T11] dev_change_flags+0xec/0x160 [ 287.125521][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 287.125647][ T11] rtnl_newlink+0x6de/0xa80 [ 287.125773][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 287.125896][ T11] netlink_rcv_skb+0x130/0x360 [ 287.126020][ T11] netlink_unicast+0x44b/0x710 [ 287.126141][ T11] netlink_sendmsg+0x723/0xbe0 [ 287.126271][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 287.126393][ T11] ___sys_sendmsg+0xee/0x170 [ 287.126518][ T11] __sys_sendmsg+0x109/0x1a0 [ 287.126640][ T11] do_syscall_64+0xc1/0x1d0 [ 287.126785][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.126945][ T11] [ 287.127034][ T11] The buggy address belongs to the object at ffff8880126ee540 [ 287.127034][ T11] which belongs to the cache net_namespace of size 6080 [ 287.127356][ T11] The buggy address is located 184 bytes inside of [ 287.127356][ T11] freed 6080-byte region [ffff8880126ee540, ffff8880126efd00) [ 287.127651][ T11] [ 287.127714][ T11] The buggy address belongs to the physical page: [ 287.127862][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x126e8 [ 287.128079][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 287.128267][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 287.128422][ T11] page_type: f5(slab) [ 287.128524][ T11] raw: 0080000000000040 ffff888001927240 ffff88800192c0a8 ffff88800192c0a8 [ 287.128741][ T11] raw: 0000000000000000 0000000000050005 00000001f5000000 0000000000000000 [ 287.128955][ T11] head: 0080000000000040 ffff888001927240 ffff88800192c0a8 ffff88800192c0a8 [ 287.129175][ T11] head: 0000000000000000 0000000000050005 00000001f5000000 0000000000000000 [ 287.129404][ T11] head: 0080000000000003 ffffea000049ba01 ffffffffffffffff 0000000000000000 [ 287.129617][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 287.129829][ T11] page dumped because: kasan: bad access detected [ 287.129985][ T11] [ 287.130046][ T11] Memory state around the buggy address: [ 287.130170][ T11] ffff8880126ee480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 287.130347][ T11] ffff8880126ee500: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 287.130516][ T11] >ffff8880126ee580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 287.130692][ T11] ^ [ 287.130870][ T11] ffff8880126ee600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 287.131043][ T11] ffff8880126ee680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 287.131216][ T11] ================================================================== [ 287.131623][ T11] Disabling lock debugging due to kernel taint