[ 11.463772][ T283] veth0: renamed from veth-rt-1 [ 12.275516][ T291] veth0: renamed from veth-rt-2 [ 51.748629][ T11] ================================================================== [ 51.748848][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 51.749040][ T11] Read of size 8 at addr ffff88800a6e80f8 by task kworker/u16:0/11 [ 51.749223][ T11] [ 51.749288][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 51.749478][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 51.749636][ T11] Workqueue: netns cleanup_net [ 51.749771][ T11] Call Trace: [ 51.749868][ T11] [ 51.749938][ T11] dump_stack_lvl+0x82/0xd0 [ 51.750069][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 51.750228][ T11] ? cleanup_net+0xa5d/0xb90 [ 51.750356][ T11] print_report+0xb4/0x270 [ 51.750481][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 51.750608][ T11] kasan_report+0xbd/0xf0 [ 51.750706][ T11] ? cleanup_net+0xa5d/0xb90 [ 51.750836][ T11] cleanup_net+0xa5d/0xb90 [ 51.750963][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 51.751090][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 51.751215][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 51.751335][ T11] ? lock_acquire+0x32/0xc0 [ 51.751458][ T11] ? process_one_work+0xe0b/0x16d0 [ 51.751587][ T11] process_one_work+0xe55/0x16d0 [ 51.751715][ T11] ? __pfx___lock_release+0x10/0x10 [ 51.751843][ T11] ? __pfx_process_one_work+0x10/0x10 [ 51.751969][ T11] ? assign_work+0x16c/0x240 [ 51.752094][ T11] worker_thread+0x58c/0xce0 [ 51.752221][ T11] ? __pfx_worker_thread+0x10/0x10 [ 51.752348][ T11] kthread+0x28a/0x350 [ 51.752445][ T11] ? __pfx_kthread+0x10/0x10 [ 51.752572][ T11] ret_from_fork+0x31/0x70 [ 51.752698][ T11] ? __pfx_kthread+0x10/0x10 [ 51.752824][ T11] ret_from_fork_asm+0x1a/0x30 [ 51.752954][ T11] [ 51.753050][ T11] [ 51.753113][ T11] Allocated by task 268: [ 51.753209][ T11] kasan_save_stack+0x24/0x50 [ 51.753338][ T11] kasan_save_track+0x14/0x30 [ 51.753461][ T11] __kasan_slab_alloc+0x59/0x70 [ 51.753584][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 51.753710][ T11] copy_net_ns+0xc6/0x540 [ 51.753804][ T11] create_new_namespaces+0x35f/0x920 [ 51.753929][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 51.754051][ T11] ksys_unshare+0x2c4/0x6e0 [ 51.754175][ T11] __x64_sys_unshare+0x31/0x40 [ 51.754303][ T11] do_syscall_64+0xc1/0x1d0 [ 51.754432][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 51.754588][ T11] [ 51.754653][ T11] Freed by task 11: [ 51.754748][ T11] kasan_save_stack+0x24/0x50 [ 51.754875][ T11] kasan_save_track+0x14/0x30 [ 51.754999][ T11] kasan_save_free_info+0x3b/0x60 [ 51.755129][ T11] __kasan_slab_free+0x38/0x50 [ 51.755253][ T11] kmem_cache_free+0xf8/0x330 [ 51.755376][ T11] cleanup_net+0x5a8/0xb90 [ 51.755498][ T11] process_one_work+0xe55/0x16d0 [ 51.755621][ T11] worker_thread+0x58c/0xce0 [ 51.755744][ T11] kthread+0x28a/0x350 [ 51.755838][ T11] ret_from_fork+0x31/0x70 [ 51.755961][ T11] ret_from_fork_asm+0x1a/0x30 [ 51.756085][ T11] [ 51.756147][ T11] Last potentially related work creation: [ 51.756269][ T11] kasan_save_stack+0x24/0x50 [ 51.756396][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 51.756519][ T11] insert_work+0x34/0x230 [ 51.756612][ T11] __queue_work+0x5fd/0xa40 [ 51.756736][ T11] queue_delayed_work_on+0x8c/0xa0 [ 51.756858][ T11] __inet_insert_ifa+0x751/0xb10 [ 51.756984][ T11] inetdev_event+0xb18/0xcf0 [ 51.757106][ T11] notifier_call_chain+0xcd/0x150 [ 51.757231][ T11] __dev_notify_flags+0xe6/0x250 [ 51.757360][ T11] dev_change_flags+0xec/0x160 [ 51.757484][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 51.757610][ T11] rtnl_newlink+0x6de/0xa80 [ 51.757737][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 51.757864][ T11] netlink_rcv_skb+0x130/0x360 [ 51.757996][ T11] netlink_unicast+0x44b/0x710 [ 51.758121][ T11] netlink_sendmsg+0x723/0xbe0 [ 51.758247][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 51.758374][ T11] ___sys_sendmsg+0xee/0x170 [ 51.758515][ T11] __sys_sendmsg+0x109/0x1a0 [ 51.758641][ T11] do_syscall_64+0xc1/0x1d0 [ 51.758768][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 51.758923][ T11] [ 51.758987][ T11] The buggy address belongs to the object at ffff88800a6e8040 [ 51.758987][ T11] which belongs to the cache net_namespace of size 6528 [ 51.759318][ T11] The buggy address is located 184 bytes inside of [ 51.759318][ T11] freed 6528-byte region [ffff88800a6e8040, ffff88800a6e99c0) [ 51.759614][ T11] [ 51.759677][ T11] The buggy address belongs to the physical page: [ 51.759831][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa6e8 [ 51.760049][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 51.760241][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 51.760400][ T11] page_type: f5(slab) [ 51.760498][ T11] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 51.760725][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 51.760949][ T11] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 51.761175][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 51.761394][ T11] head: 0080000000000003 ffffea000029ba01 ffffffffffffffff 0000000000000000 [ 51.761609][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 51.761830][ T11] page dumped because: kasan: bad access detected [ 51.761985][ T11] [ 51.762047][ T11] Memory state around the buggy address: [ 51.762170][ T11] ffff88800a6e7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.762351][ T11] ffff88800a6e8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 51.762533][ T11] >ffff88800a6e8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.762715][ T11] ^ [ 51.762898][ T11] ffff88800a6e8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.763080][ T11] ffff88800a6e8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.763263][ T11] ================================================================== [ 51.763458][ T11] Disabling lock debugging due to kernel taint