[ 12.434294][ T290] veth0: renamed from ioam-veth-alpha [ 12.528060][ T291] veth0: renamed from ioam-veth-betaL [ 12.603472][ T292] veth1: renamed from ioam-veth-betaR [ 12.686762][ T293] veth0: renamed from ioam-veth-gamma [ 98.089664][ T1258] ip (1258) used greatest stack depth: 23568 bytes left [ 221.535631][ T68] ================================================================== [ 221.535888][ T68] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 221.536106][ T68] Read of size 8 at addr ffff888009be00f8 by task kworker/u16:1/68 [ 221.536316][ T68] [ 221.536387][ T68] CPU: 3 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 221.536599][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 221.536778][ T68] Workqueue: netns cleanup_net [ 221.536928][ T68] Call Trace: [ 221.537035][ T68] [ 221.537111][ T68] dump_stack_lvl+0x82/0xd0 [ 221.537254][ T68] print_address_description.constprop.0+0x2c/0x3b0 [ 221.537431][ T68] ? cleanup_net+0xa5d/0xb90 [ 221.537572][ T68] print_report+0xb4/0x270 [ 221.537716][ T68] ? kasan_addr_to_slab+0x25/0x80 [ 221.537857][ T68] kasan_report+0xbd/0xf0 [ 221.537963][ T68] ? cleanup_net+0xa5d/0xb90 [ 221.538112][ T68] cleanup_net+0xa5d/0xb90 [ 221.538260][ T68] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 221.538405][ T68] ? __pfx_cleanup_net+0x10/0x10 [ 221.538547][ T68] ? trace_lock_acquire+0x148/0x1f0 [ 221.538687][ T68] ? lock_acquire+0x32/0xc0 [ 221.538824][ T68] ? process_one_work+0xe0b/0x16d0 [ 221.538962][ T68] process_one_work+0xe55/0x16d0 [ 221.539104][ T68] ? __pfx___lock_release+0x10/0x10 [ 221.539245][ T68] ? __pfx_process_one_work+0x10/0x10 [ 221.539387][ T68] ? assign_work+0x16c/0x240 [ 221.539527][ T68] worker_thread+0x58c/0xce0 [ 221.539667][ T68] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 221.539841][ T68] ? __pfx_worker_thread+0x10/0x10 [ 221.539980][ T68] ? __pfx_worker_thread+0x10/0x10 [ 221.540117][ T68] kthread+0x28a/0x350 [ 221.540225][ T68] ? __pfx_kthread+0x10/0x10 [ 221.540360][ T68] ret_from_fork+0x31/0x70 [ 221.540507][ T68] ? __pfx_kthread+0x10/0x10 [ 221.540649][ T68] ret_from_fork_asm+0x1a/0x30 [ 221.540792][ T68] [ 221.540899][ T68] [ 221.540971][ T68] Allocated by task 256: [ 221.541084][ T68] kasan_save_stack+0x24/0x50 [ 221.541232][ T68] kasan_save_track+0x14/0x30 [ 221.541374][ T68] __kasan_slab_alloc+0x59/0x70 [ 221.541512][ T68] kmem_cache_alloc_noprof+0x10b/0x350 [ 221.541657][ T68] copy_net_ns+0xc6/0x540 [ 221.541762][ T68] create_new_namespaces+0x35f/0x920 [ 221.541903][ T68] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 221.542042][ T68] ksys_unshare+0x2c4/0x6e0 [ 221.542184][ T68] __x64_sys_unshare+0x31/0x40 [ 221.542321][ T68] do_syscall_64+0xc1/0x1d0 [ 221.542463][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 221.542642][ T68] [ 221.542714][ T68] Freed by task 68: [ 221.542822][ T68] kasan_save_stack+0x24/0x50 [ 221.542966][ T68] kasan_save_track+0x14/0x30 [ 221.543110][ T68] kasan_save_free_info+0x3b/0x60 [ 221.543253][ T68] __kasan_slab_free+0x38/0x50 [ 221.543396][ T68] kmem_cache_free+0xf8/0x330 [ 221.543543][ T68] cleanup_net+0x5a8/0xb90 [ 221.543687][ T68] process_one_work+0xe55/0x16d0 [ 221.543834][ T68] worker_thread+0x58c/0xce0 [ 221.543971][ T68] kthread+0x28a/0x350 [ 221.544075][ T68] ret_from_fork+0x31/0x70 [ 221.544217][ T68] ret_from_fork_asm+0x1a/0x30 [ 221.544353][ T68] [ 221.544428][ T68] Last potentially related work creation: [ 221.544570][ T68] kasan_save_stack+0x24/0x50 [ 221.544717][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 221.544858][ T68] insert_work+0x34/0x230 [ 221.544967][ T68] __queue_work+0x5fd/0xa40 [ 221.545111][ T68] queue_delayed_work_on+0x8c/0xa0 [ 221.545252][ T68] __inet_insert_ifa+0x751/0xb10 [ 221.545396][ T68] inetdev_event+0xb18/0xcf0 [ 221.545551][ T68] notifier_call_chain+0xcd/0x150 [ 221.545696][ T68] __dev_notify_flags+0xe6/0x250 [ 221.545835][ T68] dev_change_flags+0xec/0x160 [ 221.545979][ T68] do_setlink.constprop.0+0x79d/0x2300 [ 221.546120][ T68] rtnl_newlink+0x6de/0xa80 [ 221.546261][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 221.546404][ T68] netlink_rcv_skb+0x130/0x360 [ 221.546550][ T68] netlink_unicast+0x44b/0x710 [ 221.546690][ T68] netlink_sendmsg+0x723/0xbe0 [ 221.546833][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 221.546976][ T68] ___sys_sendmsg+0xee/0x170 [ 221.547112][ T68] __sys_sendmsg+0x109/0x1a0 [ 221.547246][ T68] do_syscall_64+0xc1/0x1d0 [ 221.547387][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 221.547559][ T68] [ 221.547633][ T68] The buggy address belongs to the object at ffff888009be0040 [ 221.547633][ T68] which belongs to the cache net_namespace of size 6528 [ 221.547990][ T68] The buggy address is located 184 bytes inside of [ 221.547990][ T68] freed 6528-byte region [ffff888009be0040, ffff888009be19c0) [ 221.548353][ T68] [ 221.548424][ T68] The buggy address belongs to the physical page: [ 221.548601][ T68] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9be0 [ 221.548847][ T68] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 221.549064][ T68] flags: 0x80000000000040(head|node=0|zone=1) [ 221.549245][ T68] page_type: f5(slab) [ 221.549381][ T68] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 221.549641][ T68] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 221.549890][ T68] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 221.550139][ T68] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 221.550386][ T68] head: 0080000000000003 ffffea000026f801 ffffffffffffffff 0000000000000000 [ 221.550640][ T68] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 221.550886][ T68] page dumped because: kasan: bad access detected [ 221.551054][ T68] [ 221.551123][ T68] Memory state around the buggy address: [ 221.551260][ T68] ffff888009bdff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 221.551461][ T68] ffff888009be0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 221.551680][ T68] >ffff888009be0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 221.551887][ T68] ^ [ 221.552089][ T68] ffff888009be0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 221.552295][ T68] ffff888009be0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 221.552496][ T68] ================================================================== [ 221.552783][ T68] Disabling lock debugging due to kernel taint