[ 36.453960][ T439] netperf (439) used greatest stack depth: 23952 bytes left [ 43.837515][ T67] ================================================================== [ 43.837785][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 43.837983][ T67] Read of size 8 at addr ffff88800d1e80f8 by task kworker/u16:1/67 [ 43.838172][ T67] [ 43.838238][ T67] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 43.838441][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 43.838605][ T67] Workqueue: netns cleanup_net [ 43.838747][ T67] Call Trace: [ 43.838852][ T67] [ 43.838927][ T67] dump_stack_lvl+0x82/0xd0 [ 43.839065][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 43.839229][ T67] ? cleanup_net+0xa5d/0xb90 [ 43.839358][ T67] print_report+0xb4/0x270 [ 43.839492][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 43.839624][ T67] kasan_report+0xbd/0xf0 [ 43.839723][ T67] ? cleanup_net+0xa5d/0xb90 [ 43.839847][ T67] cleanup_net+0xa5d/0xb90 [ 43.839976][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.840102][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 43.840225][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 43.840350][ T67] ? lock_acquire+0x32/0xc0 [ 43.840472][ T67] ? process_one_work+0xe0b/0x16d0 [ 43.840596][ T67] process_one_work+0xe55/0x16d0 [ 43.840724][ T67] ? __pfx___lock_release+0x10/0x10 [ 43.840849][ T67] ? __pfx_process_one_work+0x10/0x10 [ 43.840975][ T67] ? assign_work+0x16c/0x240 [ 43.841100][ T67] worker_thread+0x58c/0xce0 [ 43.841226][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 43.841392][ T67] ? __pfx_worker_thread+0x10/0x10 [ 43.841520][ T67] ? __pfx_worker_thread+0x10/0x10 [ 43.841648][ T67] kthread+0x28a/0x350 [ 43.841748][ T67] ? __pfx_kthread+0x10/0x10 [ 43.841876][ T67] ret_from_fork+0x31/0x70 [ 43.842008][ T67] ? __pfx_kthread+0x10/0x10 [ 43.842140][ T67] ret_from_fork_asm+0x1a/0x30 [ 43.842273][ T67] [ 43.842371][ T67] [ 43.842439][ T67] Allocated by task 257: [ 43.842538][ T67] kasan_save_stack+0x24/0x50 [ 43.842664][ T67] kasan_save_track+0x14/0x30 [ 43.842791][ T67] __kasan_slab_alloc+0x59/0x70 [ 43.842913][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 43.843042][ T67] copy_net_ns+0xc6/0x540 [ 43.843143][ T67] create_new_namespaces+0x35f/0x920 [ 43.843272][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 43.843397][ T67] ksys_unshare+0x2c4/0x6e0 [ 43.843526][ T67] __x64_sys_unshare+0x31/0x40 [ 43.843656][ T67] do_syscall_64+0xc1/0x1d0 [ 43.843781][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 43.843951][ T67] [ 43.844018][ T67] Freed by task 67: [ 43.844116][ T67] kasan_save_stack+0x24/0x50 [ 43.844239][ T67] kasan_save_track+0x14/0x30 [ 43.844363][ T67] kasan_save_free_info+0x3b/0x60 [ 43.844496][ T67] __kasan_slab_free+0x38/0x50 [ 43.844628][ T67] kmem_cache_free+0xf8/0x330 [ 43.844755][ T67] cleanup_net+0x5a8/0xb90 [ 43.844884][ T67] process_one_work+0xe55/0x16d0 [ 43.845019][ T67] worker_thread+0x58c/0xce0 [ 43.845162][ T67] kthread+0x28a/0x350 [ 43.845261][ T67] ret_from_fork+0x31/0x70 [ 43.845388][ T67] ret_from_fork_asm+0x1a/0x30 [ 43.845510][ T67] [ 43.845576][ T67] Last potentially related work creation: [ 43.845701][ T67] kasan_save_stack+0x24/0x50 [ 43.845838][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 43.845974][ T67] insert_work+0x34/0x230 [ 43.846074][ T67] __queue_work+0x5fd/0xa40 [ 43.846203][ T67] queue_delayed_work_on+0x8c/0xa0 [ 43.846328][ T67] __inet_insert_ifa+0x751/0xb10 [ 43.846454][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 43.846590][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 43.846715][ T67] netlink_rcv_skb+0x130/0x360 [ 43.846844][ T67] netlink_unicast+0x44b/0x710 [ 43.846989][ T67] netlink_sendmsg+0x723/0xbe0 [ 43.847116][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 43.847246][ T67] ___sys_sendmsg+0xee/0x170 [ 43.847378][ T67] __sys_sendmsg+0x109/0x1a0 [ 43.847510][ T67] do_syscall_64+0xc1/0x1d0 [ 43.847658][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 43.847831][ T67] [ 43.847899][ T67] The buggy address belongs to the object at ffff88800d1e8040 [ 43.847899][ T67] which belongs to the cache net_namespace of size 6528 [ 43.848258][ T67] The buggy address is located 184 bytes inside of [ 43.848258][ T67] freed 6528-byte region [ffff88800d1e8040, ffff88800d1e99c0) [ 43.848563][ T67] [ 43.848641][ T67] The buggy address belongs to the physical page: [ 43.848792][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800d1ed140 pfn:0xd1e8 [ 43.849064][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 43.849261][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 43.849420][ T67] page_type: f5(slab) [ 43.849519][ T67] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 43.849752][ T67] raw: ffff88800d1ed140 0000000000040003 00000001f5000000 0000000000000000 [ 43.849985][ T67] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 43.850219][ T67] head: ffff88800d1ed140 0000000000040003 00000001f5000000 0000000000000000 [ 43.850450][ T67] head: 0080000000000003 ffffea0000347a01 ffffffffffffffff 0000000000000000 [ 43.850670][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 43.850894][ T67] page dumped because: kasan: bad access detected [ 43.851052][ T67] [ 43.851118][ T67] Memory state around the buggy address: [ 43.851238][ T67] ffff88800d1e7f80: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 43.851434][ T67] ffff88800d1e8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 43.851614][ T67] >ffff88800d1e8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.851802][ T67] ^ [ 43.851980][ T67] ffff88800d1e8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.852161][ T67] ffff88800d1e8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.852344][ T67] ================================================================== [ 43.852557][ T67] Disabling lock debugging due to kernel taint