[ 10.299675][ T254] ip (254) used greatest stack depth: 23808 bytes left [ 14.059365][ T65] ================================================================== [ 14.059621][ T65] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 14.059844][ T65] Read of size 8 at addr ffff888009d400f8 by task kworker/u16:1/65 [ 14.060058][ T65] [ 14.060133][ T65] CPU: 3 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 14.060349][ T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 14.060524][ T65] Workqueue: netns cleanup_net [ 14.060669][ T65] Call Trace: [ 14.060777][ T65] [ 14.060855][ T65] dump_stack_lvl+0x82/0xd0 [ 14.061006][ T65] print_address_description.constprop.0+0x2c/0x3b0 [ 14.061185][ T65] ? cleanup_net+0xa5d/0xb90 [ 14.061334][ T65] print_report+0xb4/0x270 [ 14.061476][ T65] ? kasan_addr_to_slab+0x25/0x80 [ 14.061618][ T65] kasan_report+0xbd/0xf0 [ 14.061724][ T65] ? cleanup_net+0xa5d/0xb90 [ 14.061866][ T65] cleanup_net+0xa5d/0xb90 [ 14.062006][ T65] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 14.062146][ T65] ? __pfx_cleanup_net+0x10/0x10 [ 14.062282][ T65] ? trace_lock_acquire+0x148/0x1f0 [ 14.062420][ T65] ? lock_acquire+0x32/0xc0 [ 14.062559][ T65] ? process_one_work+0xe0b/0x16d0 [ 14.062700][ T65] process_one_work+0xe55/0x16d0 [ 14.062841][ T65] ? __pfx___lock_release+0x10/0x10 [ 14.062982][ T65] ? __pfx_process_one_work+0x10/0x10 [ 14.063123][ T65] ? assign_work+0x16c/0x240 [ 14.063259][ T65] worker_thread+0x58c/0xce0 [ 14.063397][ T65] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 14.063566][ T65] ? __pfx_worker_thread+0x10/0x10 [ 14.063702][ T65] ? __pfx_worker_thread+0x10/0x10 [ 14.063839][ T65] kthread+0x28a/0x350 [ 14.063948][ T65] ? __pfx_kthread+0x10/0x10 [ 14.064089][ T65] ret_from_fork+0x31/0x70 [ 14.064232][ T65] ? __pfx_kthread+0x10/0x10 [ 14.064368][ T65] ret_from_fork_asm+0x1a/0x30 [ 14.064512][ T65] [ 14.064616][ T65] [ 14.064689][ T65] Allocated by task 253: [ 14.064796][ T65] kasan_save_stack+0x24/0x50 [ 14.064938][ T65] kasan_save_track+0x14/0x30 [ 14.065075][ T65] __kasan_slab_alloc+0x59/0x70 [ 14.065210][ T65] kmem_cache_alloc_noprof+0x10b/0x350 [ 14.065353][ T65] copy_net_ns+0xc6/0x540 [ 14.065456][ T65] create_new_namespaces+0x35f/0x920 [ 14.065596][ T65] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 14.065732][ T65] ksys_unshare+0x2c4/0x6e0 [ 14.065871][ T65] __x64_sys_unshare+0x31/0x40 [ 14.066007][ T65] do_syscall_64+0xc1/0x1d0 [ 14.066145][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.066317][ T65] [ 14.066389][ T65] Freed by task 65: [ 14.066490][ T65] kasan_save_stack+0x24/0x50 [ 14.066628][ T65] kasan_save_track+0x14/0x30 [ 14.066762][ T65] kasan_save_free_info+0x3b/0x60 [ 14.066899][ T65] __kasan_slab_free+0x38/0x50 [ 14.067035][ T65] kmem_cache_free+0xf8/0x330 [ 14.067172][ T65] cleanup_net+0x5a8/0xb90 [ 14.067306][ T65] process_one_work+0xe55/0x16d0 [ 14.067442][ T65] worker_thread+0x58c/0xce0 [ 14.067577][ T65] kthread+0x28a/0x350 [ 14.067682][ T65] ret_from_fork+0x31/0x70 [ 14.067818][ T65] ret_from_fork_asm+0x1a/0x30 [ 14.067952][ T65] [ 14.068021][ T65] Last potentially related work creation: [ 14.068157][ T65] kasan_save_stack+0x24/0x50 [ 14.068297][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 14.068432][ T65] insert_work+0x34/0x230 [ 14.068535][ T65] __queue_work+0x5fd/0xa40 [ 14.068673][ T65] queue_delayed_work_on+0x8c/0xa0 [ 14.068810][ T65] __inet_insert_ifa+0x751/0xb10 [ 14.068949][ T65] inet_rtm_newaddr+0x833/0xbd0 [ 14.069085][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 14.069226][ T65] netlink_rcv_skb+0x130/0x360 [ 14.069369][ T65] netlink_unicast+0x44b/0x710 [ 14.069508][ T65] netlink_sendmsg+0x723/0xbe0 [ 14.069645][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 14.069784][ T65] ___sys_sendmsg+0xee/0x170 [ 14.069921][ T65] __sys_sendmsg+0x109/0x1a0 [ 14.070056][ T65] do_syscall_64+0xc1/0x1d0 [ 14.070193][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.070364][ T65] [ 14.070434][ T65] Second to last potentially related work creation: [ 14.070604][ T65] kasan_save_stack+0x24/0x50 [ 14.070745][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 14.070885][ T65] insert_work+0x34/0x230 [ 14.070990][ T65] __queue_work+0x5fd/0xa40 [ 14.071127][ T65] queue_delayed_work_on+0x8c/0xa0 [ 14.071272][ T65] __inet_insert_ifa+0x751/0xb10 [ 14.071412][ T65] inetdev_event+0xb18/0xcf0 [ 14.071549][ T65] notifier_call_chain+0xcd/0x150 [ 14.071684][ T65] __dev_notify_flags+0xe6/0x250 [ 14.071820][ T65] dev_change_flags+0xec/0x160 [ 14.071958][ T65] do_setlink.constprop.0+0x79d/0x2300 [ 14.072095][ T65] rtnl_newlink+0x6de/0xa80 [ 14.072233][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 14.072367][ T65] netlink_rcv_skb+0x130/0x360 [ 14.072504][ T65] netlink_unicast+0x44b/0x710 [ 14.072643][ T65] netlink_sendmsg+0x723/0xbe0 [ 14.072779][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 14.072922][ T65] ___sys_sendmsg+0xee/0x170 [ 14.073065][ T65] __sys_sendmsg+0x109/0x1a0 [ 14.073210][ T65] do_syscall_64+0xc1/0x1d0 [ 14.073351][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.073524][ T65] [ 14.073596][ T65] The buggy address belongs to the object at ffff888009d40040 [ 14.073596][ T65] which belongs to the cache net_namespace of size 6528 [ 14.073972][ T65] The buggy address is located 184 bytes inside of [ 14.073972][ T65] freed 6528-byte region [ffff888009d40040, ffff888009d419c0) [ 14.074313][ T65] [ 14.074385][ T65] The buggy address belongs to the physical page: [ 14.074555][ T65] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009d45140 pfn:0x9d40 [ 14.074841][ T65] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 14.075057][ T65] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 14.075237][ T65] page_type: f5(slab) [ 14.075350][ T65] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.075600][ T65] raw: ffff888009d45140 0000000000040003 00000001f5000000 0000000000000000 [ 14.075845][ T65] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.076097][ T65] head: ffff888009d45140 0000000000040003 00000001f5000000 0000000000000000 [ 14.076341][ T65] head: 0080000000000003 ffffea0000275001 ffffffffffffffff 0000000000000000 [ 14.076587][ T65] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 14.076831][ T65] page dumped because: kasan: bad access detected [ 14.077008][ T65] [ 14.077085][ T65] Memory state around the buggy address: [ 14.077223][ T65] ffff888009d3ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.077428][ T65] ffff888009d40000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 14.077630][ T65] >ffff888009d40080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.077835][ T65] ^ [ 14.078043][ T65] ffff888009d40100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.078243][ T65] ffff888009d40180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.078442][ T65] ================================================================== [ 14.078677][ T65] Disabling lock debugging due to kernel taint