[ 10.327166][ T260] ip (260) used greatest stack depth: 24464 bytes left [ 34.698730][ T439] netperf (439) used greatest stack depth: 24424 bytes left [ 41.384935][ T488] ip (488) used greatest stack depth: 23488 bytes left [ 41.836780][ T11] ================================================================== [ 41.837035][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 41.837241][ T11] Read of size 8 at addr ffff888015bb00f8 by task kworker/u16:0/11 [ 41.837436][ T11] [ 41.837502][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 41.837687][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 41.837844][ T11] Workqueue: netns cleanup_net [ 41.837979][ T11] Call Trace: [ 41.838083][ T11] [ 41.838148][ T11] dump_stack_lvl+0x82/0xd0 [ 41.838285][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 41.838461][ T11] ? cleanup_net+0xa5d/0xb90 [ 41.838591][ T11] print_report+0xb4/0x270 [ 41.838717][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 41.838840][ T11] kasan_report+0xbd/0xf0 [ 41.838935][ T11] ? cleanup_net+0xa5d/0xb90 [ 41.839063][ T11] cleanup_net+0xa5d/0xb90 [ 41.839193][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 41.839328][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 41.839452][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 41.839586][ T11] ? lock_acquire+0x32/0xc0 [ 41.839710][ T11] ? process_one_work+0xe0b/0x16d0 [ 41.839836][ T11] process_one_work+0xe55/0x16d0 [ 41.839967][ T11] ? __pfx___lock_release+0x10/0x10 [ 41.840091][ T11] ? __pfx_process_one_work+0x10/0x10 [ 41.840218][ T11] ? assign_work+0x16c/0x240 [ 41.840344][ T11] worker_thread+0x58c/0xce0 [ 41.840473][ T11] ? __pfx_worker_thread+0x10/0x10 [ 41.840599][ T11] kthread+0x28a/0x350 [ 41.840697][ T11] ? __pfx_kthread+0x10/0x10 [ 41.840827][ T11] ret_from_fork+0x31/0x70 [ 41.840948][ T11] ? __pfx_kthread+0x10/0x10 [ 41.841080][ T11] ret_from_fork_asm+0x1a/0x30 [ 41.841208][ T11] [ 41.841306][ T11] [ 41.841371][ T11] Allocated by task 256: [ 41.841464][ T11] kasan_save_stack+0x24/0x50 [ 41.841592][ T11] kasan_save_track+0x14/0x30 [ 41.841725][ T11] __kasan_slab_alloc+0x59/0x70 [ 41.841851][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 41.841975][ T11] copy_net_ns+0xc6/0x540 [ 41.842067][ T11] create_new_namespaces+0x35f/0x920 [ 41.842191][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 41.842316][ T11] ksys_unshare+0x2c4/0x6e0 [ 41.842453][ T11] __x64_sys_unshare+0x31/0x40 [ 41.842579][ T11] do_syscall_64+0xc1/0x1d0 [ 41.842705][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 41.842860][ T11] [ 41.842934][ T11] Freed by task 11: [ 41.843027][ T11] kasan_save_stack+0x24/0x50 [ 41.843155][ T11] kasan_save_track+0x14/0x30 [ 41.843282][ T11] kasan_save_free_info+0x3b/0x60 [ 41.843412][ T11] __kasan_slab_free+0x38/0x50 [ 41.843549][ T11] kmem_cache_free+0xf8/0x330 [ 41.843674][ T11] cleanup_net+0x5a8/0xb90 [ 41.843807][ T11] process_one_work+0xe55/0x16d0 [ 41.843940][ T11] worker_thread+0x58c/0xce0 [ 41.844062][ T11] kthread+0x28a/0x350 [ 41.844155][ T11] ret_from_fork+0x31/0x70 [ 41.844285][ T11] ret_from_fork_asm+0x1a/0x30 [ 41.844407][ T11] [ 41.844470][ T11] Last potentially related work creation: [ 41.844600][ T11] kasan_save_stack+0x24/0x50 [ 41.844735][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 41.844864][ T11] insert_work+0x34/0x230 [ 41.844964][ T11] __queue_work+0x5fd/0xa40 [ 41.845099][ T11] queue_delayed_work_on+0x8c/0xa0 [ 41.845235][ T11] __inet_insert_ifa+0x751/0xb10 [ 41.845382][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 41.845522][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 41.845665][ T11] netlink_rcv_skb+0x130/0x360 [ 41.845807][ T11] netlink_unicast+0x44b/0x710 [ 41.845947][ T11] netlink_sendmsg+0x723/0xbe0 [ 41.846088][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 41.846230][ T11] ___sys_sendmsg+0xee/0x170 [ 41.846382][ T11] __sys_sendmsg+0x109/0x1a0 [ 41.846515][ T11] do_syscall_64+0xc1/0x1d0 [ 41.846643][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 41.846800][ T11] [ 41.846862][ T11] The buggy address belongs to the object at ffff888015bb0040 [ 41.846862][ T11] which belongs to the cache net_namespace of size 6528 [ 41.847206][ T11] The buggy address is located 184 bytes inside of [ 41.847206][ T11] freed 6528-byte region [ffff888015bb0040, ffff888015bb19c0) [ 41.847529][ T11] [ 41.847603][ T11] The buggy address belongs to the physical page: [ 41.847775][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888015bb5140 pfn:0x15bb0 [ 41.848052][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 41.848258][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 41.848439][ T11] page_type: f5(slab) [ 41.848551][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 41.848802][ T11] raw: ffff888015bb5140 0000000000040003 00000001f5000000 0000000000000000 [ 41.849050][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 41.849297][ T11] head: ffff888015bb5140 0000000000040003 00000001f5000000 0000000000000000 [ 41.849546][ T11] head: 0080000000000003 ffffea000056ec01 ffffffffffffffff 0000000000000000 [ 41.849792][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 41.850037][ T11] page dumped because: kasan: bad access detected [ 41.850209][ T11] [ 41.850279][ T11] Memory state around the buggy address: [ 41.850417][ T11] ffff888015baff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 41.850623][ T11] ffff888015bb0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 41.850832][ T11] >ffff888015bb0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.851022][ T11] ^ [ 41.851201][ T11] ffff888015bb0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.851384][ T11] ffff888015bb0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.851558][ T11] ================================================================== [ 41.851765][ T11] Disabling lock debugging due to kernel taint