[ 10.952248][ T277] veth0: renamed from veth-rt-1 [ 11.843155][ T286] veth0: renamed from veth-rt-2 [ 18.605750][ T11] ================================================================== [ 18.605991][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 18.606202][ T11] Read of size 8 at addr ffff8880024480f8 by task kworker/u16:0/11 [ 18.606401][ T11] [ 18.606473][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 18.606680][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 18.606849][ T11] Workqueue: netns cleanup_net [ 18.606992][ T11] Call Trace: [ 18.607096][ T11] [ 18.607169][ T11] dump_stack_lvl+0x82/0xd0 [ 18.607310][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 18.607489][ T11] ? cleanup_net+0xa5d/0xb90 [ 18.607626][ T11] print_report+0xb4/0x270 [ 18.607764][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 18.607900][ T11] kasan_report+0xbd/0xf0 [ 18.608006][ T11] ? cleanup_net+0xa5d/0xb90 [ 18.608156][ T11] cleanup_net+0xa5d/0xb90 [ 18.608292][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 18.608429][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 18.608566][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 18.608708][ T11] ? lock_acquire+0x32/0xc0 [ 18.608848][ T11] ? process_one_work+0xe0b/0x16d0 [ 18.608992][ T11] process_one_work+0xe55/0x16d0 [ 18.609132][ T11] ? __pfx___lock_release+0x10/0x10 [ 18.609269][ T11] ? __pfx_process_one_work+0x10/0x10 [ 18.609411][ T11] ? assign_work+0x16c/0x240 [ 18.609551][ T11] worker_thread+0x58c/0xce0 [ 18.609695][ T11] ? __pfx_worker_thread+0x10/0x10 [ 18.609834][ T11] kthread+0x28a/0x350 [ 18.609941][ T11] ? __pfx_kthread+0x10/0x10 [ 18.610081][ T11] ret_from_fork+0x31/0x70 [ 18.610221][ T11] ? __pfx_kthread+0x10/0x10 [ 18.610363][ T11] ret_from_fork_asm+0x1a/0x30 [ 18.610506][ T11] [ 18.610614][ T11] [ 18.610685][ T11] Allocated by task 263: [ 18.610793][ T11] kasan_save_stack+0x24/0x50 [ 18.610933][ T11] kasan_save_track+0x14/0x30 [ 18.611070][ T11] __kasan_slab_alloc+0x59/0x70 [ 18.611208][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 18.611349][ T11] copy_net_ns+0xc6/0x540 [ 18.611453][ T11] create_new_namespaces+0x35f/0x920 [ 18.611593][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 18.611734][ T11] ksys_unshare+0x2c4/0x6e0 [ 18.611874][ T11] __x64_sys_unshare+0x31/0x40 [ 18.612014][ T11] do_syscall_64+0xc1/0x1d0 [ 18.612152][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.612333][ T11] [ 18.612403][ T11] Freed by task 11: [ 18.612504][ T11] kasan_save_stack+0x24/0x50 [ 18.612641][ T11] kasan_save_track+0x14/0x30 [ 18.612782][ T11] kasan_save_free_info+0x3b/0x60 [ 18.612923][ T11] __kasan_slab_free+0x38/0x50 [ 18.613060][ T11] kmem_cache_free+0xf8/0x330 [ 18.613195][ T11] cleanup_net+0x5a8/0xb90 [ 18.613332][ T11] process_one_work+0xe55/0x16d0 [ 18.613471][ T11] worker_thread+0x58c/0xce0 [ 18.613606][ T11] kthread+0x28a/0x350 [ 18.613710][ T11] ret_from_fork+0x31/0x70 [ 18.613846][ T11] ret_from_fork_asm+0x1a/0x30 [ 18.613989][ T11] [ 18.614058][ T11] Last potentially related work creation: [ 18.614193][ T11] kasan_save_stack+0x24/0x50 [ 18.614333][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 18.614471][ T11] insert_work+0x34/0x230 [ 18.614576][ T11] __queue_work+0x5fd/0xa40 [ 18.614711][ T11] queue_delayed_work_on+0x8c/0xa0 [ 18.614852][ T11] __inet_insert_ifa+0x751/0xb10 [ 18.614996][ T11] inetdev_event+0xb18/0xcf0 [ 18.615137][ T11] notifier_call_chain+0xcd/0x150 [ 18.615275][ T11] __dev_notify_flags+0xe6/0x250 [ 18.615428][ T11] dev_change_flags+0xec/0x160 [ 18.615568][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 18.615707][ T11] rtnl_newlink+0x6de/0xa80 [ 18.615846][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 18.615987][ T11] netlink_rcv_skb+0x130/0x360 [ 18.616128][ T11] netlink_unicast+0x44b/0x710 [ 18.616267][ T11] netlink_sendmsg+0x723/0xbe0 [ 18.616403][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 18.616543][ T11] ___sys_sendmsg+0xee/0x170 [ 18.616684][ T11] __sys_sendmsg+0x109/0x1a0 [ 18.616824][ T11] do_syscall_64+0xc1/0x1d0 [ 18.616964][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.617138][ T11] [ 18.617209][ T11] The buggy address belongs to the object at ffff888002448040 [ 18.617209][ T11] which belongs to the cache net_namespace of size 6528 [ 18.617573][ T11] The buggy address is located 184 bytes inside of [ 18.617573][ T11] freed 6528-byte region [ffff888002448040, ffff8880024499c0) [ 18.617904][ T11] [ 18.617974][ T11] The buggy address belongs to the physical page: [ 18.618145][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2448 [ 18.618389][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 18.618597][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 18.618770][ T11] page_type: f5(slab) [ 18.618879][ T11] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 18.619126][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 18.619376][ T11] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 18.619619][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 18.619858][ T11] head: 0080000000000003 ffffea0000091201 ffffffffffffffff 0000000000000000 [ 18.620104][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 18.620347][ T11] page dumped because: kasan: bad access detected [ 18.620517][ T11] [ 18.620595][ T11] Memory state around the buggy address: [ 18.620739][ T11] ffff888002447f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.620939][ T11] ffff888002448000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 18.621141][ T11] >ffff888002448080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.621341][ T11] ^ [ 18.621536][ T11] ffff888002448100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.621735][ T11] ffff888002448180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.621932][ T11] ================================================================== [ 18.622211][ T11] Disabling lock debugging due to kernel taint