[ 9.677838][ T257] ip (257) used greatest stack depth: 23984 bytes left [ 11.248218][ T282] ip (282) used greatest stack depth: 23952 bytes left [ 12.143445][ T297] ip (297) used greatest stack depth: 22760 bytes left [ 13.753976][ T66] ================================================================== [ 13.754192][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 13.754383][ T66] Read of size 8 at addr ffff888009d180f8 by task kworker/u16:1/66 [ 13.754560][ T66] [ 13.754624][ T66] CPU: 2 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 13.754810][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.754965][ T66] Workqueue: netns cleanup_net [ 13.755098][ T66] Call Trace: [ 13.755193][ T66] [ 13.755260][ T66] dump_stack_lvl+0x82/0xd0 [ 13.755387][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 13.755543][ T66] ? cleanup_net+0xa5d/0xb90 [ 13.755669][ T66] print_report+0xb4/0x270 [ 13.755794][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 13.755918][ T66] kasan_report+0xbd/0xf0 [ 13.756013][ T66] ? cleanup_net+0xa5d/0xb90 [ 13.756139][ T66] cleanup_net+0xa5d/0xb90 [ 13.756264][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.756391][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 13.756518][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 13.756643][ T66] ? lock_acquire+0x32/0xc0 [ 13.756768][ T66] ? process_one_work+0xe0b/0x16d0 [ 13.756896][ T66] process_one_work+0xe55/0x16d0 [ 13.757019][ T66] ? __pfx___lock_release+0x10/0x10 [ 13.757143][ T66] ? __pfx_process_one_work+0x10/0x10 [ 13.757269][ T66] ? assign_work+0x16c/0x240 [ 13.757393][ T66] worker_thread+0x58c/0xce0 [ 13.757522][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 13.757678][ T66] ? __pfx_worker_thread+0x10/0x10 [ 13.757802][ T66] ? __pfx_worker_thread+0x10/0x10 [ 13.757925][ T66] kthread+0x28a/0x350 [ 13.758021][ T66] ? __pfx_kthread+0x10/0x10 [ 13.758147][ T66] ret_from_fork+0x31/0x70 [ 13.758270][ T66] ? __pfx_kthread+0x10/0x10 [ 13.758393][ T66] ret_from_fork_asm+0x1a/0x30 [ 13.758524][ T66] [ 13.758619][ T66] [ 13.758684][ T66] Allocated by task 256: [ 13.758779][ T66] kasan_save_stack+0x24/0x50 [ 13.758904][ T66] kasan_save_track+0x14/0x30 [ 13.759026][ T66] __kasan_slab_alloc+0x59/0x70 [ 13.759148][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 13.759274][ T66] copy_net_ns+0xc6/0x540 [ 13.759366][ T66] create_new_namespaces+0x35f/0x920 [ 13.759491][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 13.759613][ T66] ksys_unshare+0x2c4/0x6e0 [ 13.759736][ T66] __x64_sys_unshare+0x31/0x40 [ 13.759857][ T66] do_syscall_64+0xc1/0x1d0 [ 13.759982][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.760136][ T66] [ 13.760198][ T66] Freed by task 66: [ 13.760290][ T66] kasan_save_stack+0x24/0x50 [ 13.760413][ T66] kasan_save_track+0x14/0x30 [ 13.760534][ T66] kasan_save_free_info+0x3b/0x60 [ 13.760657][ T66] __kasan_slab_free+0x38/0x50 [ 13.760779][ T66] kmem_cache_free+0xf8/0x330 [ 13.760902][ T66] cleanup_net+0x5a8/0xb90 [ 13.761023][ T66] process_one_work+0xe55/0x16d0 [ 13.761148][ T66] worker_thread+0x58c/0xce0 [ 13.761270][ T66] kthread+0x28a/0x350 [ 13.761362][ T66] ret_from_fork+0x31/0x70 [ 13.761489][ T66] ret_from_fork_asm+0x1a/0x30 [ 13.761611][ T66] [ 13.761675][ T66] Last potentially related work creation: [ 13.761796][ T66] kasan_save_stack+0x24/0x50 [ 13.761926][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 13.762063][ T66] insert_work+0x34/0x230 [ 13.762159][ T66] __queue_work+0x5fd/0xa40 [ 13.762282][ T66] queue_delayed_work_on+0x8c/0xa0 [ 13.762405][ T66] __inet_insert_ifa+0x751/0xb10 [ 13.762536][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 13.762659][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 13.762782][ T66] netlink_rcv_skb+0x130/0x360 [ 13.762907][ T66] netlink_unicast+0x44b/0x710 [ 13.763033][ T66] netlink_sendmsg+0x723/0xbe0 [ 13.763158][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 13.763282][ T66] ___sys_sendmsg+0xee/0x170 [ 13.763406][ T66] __sys_sendmsg+0x109/0x1a0 [ 13.763530][ T66] do_syscall_64+0xc1/0x1d0 [ 13.763655][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.763808][ T66] [ 13.763871][ T66] Second to last potentially related work creation: [ 13.764018][ T66] kasan_save_stack+0x24/0x50 [ 13.764144][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 13.764267][ T66] insert_work+0x34/0x230 [ 13.764361][ T66] __queue_work+0x5fd/0xa40 [ 13.764484][ T66] queue_delayed_work_on+0x8c/0xa0 [ 13.764611][ T66] __inet_insert_ifa+0x751/0xb10 [ 13.764736][ T66] inetdev_event+0xb18/0xcf0 [ 13.764857][ T66] notifier_call_chain+0xcd/0x150 [ 13.764980][ T66] __dev_notify_flags+0xe6/0x250 [ 13.765105][ T66] dev_change_flags+0xec/0x160 [ 13.765232][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 13.765357][ T66] rtnl_newlink+0x6de/0xa80 [ 13.765479][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 13.765603][ T66] netlink_rcv_skb+0x130/0x360 [ 13.765729][ T66] netlink_unicast+0x44b/0x710 [ 13.765854][ T66] netlink_sendmsg+0x723/0xbe0 [ 13.765978][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 13.766104][ T66] ___sys_sendmsg+0xee/0x170 [ 13.766227][ T66] __sys_sendmsg+0x109/0x1a0 [ 13.766349][ T66] do_syscall_64+0xc1/0x1d0 [ 13.766470][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.766625][ T66] [ 13.766688][ T66] The buggy address belongs to the object at ffff888009d18040 [ 13.766688][ T66] which belongs to the cache net_namespace of size 6528 [ 13.767005][ T66] The buggy address is located 184 bytes inside of [ 13.767005][ T66] freed 6528-byte region [ffff888009d18040, ffff888009d199c0) [ 13.767300][ T66] [ 13.767365][ T66] The buggy address belongs to the physical page: [ 13.767514][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009d1b640 pfn:0x9d18 [ 13.767774][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 13.767959][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 13.768117][ T66] page_type: f5(slab) [ 13.768215][ T66] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.768437][ T66] raw: ffff888009d1b640 0000000000040002 00000001f5000000 0000000000000000 [ 13.768655][ T66] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.768877][ T66] head: ffff888009d1b640 0000000000040002 00000001f5000000 0000000000000000 [ 13.769097][ T66] head: 0080000000000003 ffffea0000274601 ffffffffffffffff 0000000000000000 [ 13.769313][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 13.769528][ T66] page dumped because: kasan: bad access detected [ 13.769678][ T66] [ 13.769739][ T66] Memory state around the buggy address: [ 13.769858][ T66] ffff888009d17f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.770035][ T66] ffff888009d18000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.770210][ T66] >ffff888009d18080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.770381][ T66] ^ [ 13.770557][ T66] ffff888009d18100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.770733][ T66] ffff888009d18180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.770907][ T66] ================================================================== [ 13.771149][ T66] Disabling lock debugging due to kernel taint