[ 8.473535][ T199] make (199) used greatest stack depth: 24448 bytes left [ 10.138082][ T259] ip (259) used greatest stack depth: 24120 bytes left [ 12.141208][ T11] ================================================================== [ 12.141443][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 12.141647][ T11] Read of size 8 at addr ffff88800c3880f8 by task kworker/u16:0/11 [ 12.141845][ T11] [ 12.141915][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 12.142120][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 12.142295][ T11] Workqueue: netns cleanup_net [ 12.142435][ T11] Call Trace: [ 12.142537][ T11] [ 12.142609][ T11] dump_stack_lvl+0x82/0xd0 [ 12.142750][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 12.142924][ T11] ? cleanup_net+0xa5d/0xb90 [ 12.143059][ T11] print_report+0xb4/0x270 [ 12.143195][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 12.143331][ T11] kasan_report+0xbd/0xf0 [ 12.143435][ T11] ? cleanup_net+0xa5d/0xb90 [ 12.143576][ T11] cleanup_net+0xa5d/0xb90 [ 12.143714][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 12.143856][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 12.143990][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 12.144129][ T11] ? lock_acquire+0x32/0xc0 [ 12.144266][ T11] ? process_one_work+0xe0b/0x16d0 [ 12.144404][ T11] process_one_work+0xe55/0x16d0 [ 12.144544][ T11] ? __pfx___lock_release+0x10/0x10 [ 12.144683][ T11] ? __pfx_process_one_work+0x10/0x10 [ 12.144824][ T11] ? assign_work+0x16c/0x240 [ 12.144960][ T11] worker_thread+0x58c/0xce0 [ 12.145099][ T11] ? __pfx_worker_thread+0x10/0x10 [ 12.145233][ T11] kthread+0x28a/0x350 [ 12.145336][ T11] ? __pfx_kthread+0x10/0x10 [ 12.145469][ T11] ret_from_fork+0x31/0x70 [ 12.145604][ T11] ? __pfx_kthread+0x10/0x10 [ 12.145742][ T11] ret_from_fork_asm+0x1a/0x30 [ 12.145882][ T11] [ 12.145984][ T11] [ 12.146054][ T11] Allocated by task 258: [ 12.146156][ T11] kasan_save_stack+0x24/0x50 [ 12.146297][ T11] kasan_save_track+0x14/0x30 [ 12.146431][ T11] __kasan_slab_alloc+0x59/0x70 [ 12.146566][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 12.146707][ T11] copy_net_ns+0xc6/0x540 [ 12.146809][ T11] create_new_namespaces+0x35f/0x920 [ 12.146948][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 12.147082][ T11] ksys_unshare+0x2c4/0x6e0 [ 12.147218][ T11] __x64_sys_unshare+0x31/0x40 [ 12.147355][ T11] do_syscall_64+0xc1/0x1d0 [ 12.147490][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 12.147660][ T11] [ 12.147732][ T11] Freed by task 11: [ 12.147834][ T11] kasan_save_stack+0x24/0x50 [ 12.147968][ T11] kasan_save_track+0x14/0x30 [ 12.148102][ T11] kasan_save_free_info+0x3b/0x60 [ 12.148238][ T11] __kasan_slab_free+0x38/0x50 [ 12.148373][ T11] kmem_cache_free+0xf8/0x330 [ 12.148508][ T11] cleanup_net+0x5a8/0xb90 [ 12.148640][ T11] process_one_work+0xe55/0x16d0 [ 12.148771][ T11] worker_thread+0x58c/0xce0 [ 12.148906][ T11] kthread+0x28a/0x350 [ 12.149011][ T11] ret_from_fork+0x31/0x70 [ 12.149143][ T11] ret_from_fork_asm+0x1a/0x30 [ 12.149277][ T11] [ 12.149346][ T11] Last potentially related work creation: [ 12.149487][ T11] kasan_save_stack+0x24/0x50 [ 12.149633][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 12.149773][ T11] insert_work+0x34/0x230 [ 12.149880][ T11] __queue_work+0x5fd/0xa40 [ 12.150018][ T11] queue_delayed_work_on+0x8c/0xa0 [ 12.150154][ T11] __inet_insert_ifa+0x751/0xb10 [ 12.150294][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 12.150434][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 12.150574][ T11] netlink_rcv_skb+0x130/0x360 [ 12.150714][ T11] netlink_unicast+0x44b/0x710 [ 12.150857][ T11] netlink_sendmsg+0x723/0xbe0 [ 12.150995][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 12.151135][ T11] ___sys_sendmsg+0xee/0x170 [ 12.151271][ T11] __sys_sendmsg+0x109/0x1a0 [ 12.151410][ T11] do_syscall_64+0xc1/0x1d0 [ 12.151548][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 12.151720][ T11] [ 12.151793][ T11] Second to last potentially related work creation: [ 12.151959][ T11] kasan_save_stack+0x24/0x50 [ 12.152095][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 12.152233][ T11] insert_work+0x34/0x230 [ 12.152338][ T11] __queue_work+0x5fd/0xa40 [ 12.152477][ T11] queue_delayed_work_on+0x8c/0xa0 [ 12.152614][ T11] __inet_insert_ifa+0x751/0xb10 [ 12.152753][ T11] inetdev_event+0xb18/0xcf0 [ 12.152892][ T11] notifier_call_chain+0xcd/0x150 [ 12.153032][ T11] __dev_notify_flags+0xe6/0x250 [ 12.153171][ T11] dev_change_flags+0xec/0x160 [ 12.153308][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 12.153446][ T11] rtnl_newlink+0x6de/0xa80 [ 12.153580][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 12.153716][ T11] netlink_rcv_skb+0x130/0x360 [ 12.153853][ T11] netlink_unicast+0x44b/0x710 [ 12.153989][ T11] netlink_sendmsg+0x723/0xbe0 [ 12.154123][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 12.154262][ T11] ___sys_sendmsg+0xee/0x170 [ 12.154401][ T11] __sys_sendmsg+0x109/0x1a0 [ 12.154539][ T11] do_syscall_64+0xc1/0x1d0 [ 12.154669][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 12.154838][ T11] [ 12.154909][ T11] The buggy address belongs to the object at ffff88800c388040 [ 12.154909][ T11] which belongs to the cache net_namespace of size 6528 [ 12.155269][ T11] The buggy address is located 184 bytes inside of [ 12.155269][ T11] freed 6528-byte region [ffff88800c388040, ffff88800c3899c0) [ 12.155596][ T11] [ 12.155668][ T11] The buggy address belongs to the physical page: [ 12.155840][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800c38b640 pfn:0xc388 [ 12.156117][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 12.156323][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 12.156496][ T11] page_type: f5(slab) [ 12.156607][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 12.156854][ T11] raw: ffff88800c38b640 0000000000040002 00000001f5000000 0000000000000000 [ 12.157091][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 12.157329][ T11] head: ffff88800c38b640 0000000000040002 00000001f5000000 0000000000000000 [ 12.157569][ T11] head: 0080000000000003 ffffea000030e201 ffffffffffffffff 0000000000000000 [ 12.157807][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 12.158045][ T11] page dumped because: kasan: bad access detected [ 12.158211][ T11] [ 12.158280][ T11] Memory state around the buggy address: [ 12.158412][ T11] ffff88800c387f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.158611][ T11] ffff88800c388000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 12.158813][ T11] >ffff88800c388080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.159008][ T11] ^ [ 12.159203][ T11] ffff88800c388100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.159404][ T11] ffff88800c388180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.159601][ T11] ================================================================== [ 12.159815][ T11] Disabling lock debugging due to kernel taint