[ 19.931087][ T11] ================================================================== [ 19.931331][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 19.931534][ T11] Read of size 8 at addr ffff88800c251bf8 by task kworker/u16:0/11 [ 19.931726][ T11] [ 19.931796][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 19.931998][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 19.932169][ T11] Workqueue: netns cleanup_net [ 19.932308][ T11] Call Trace: [ 19.932412][ T11] [ 19.932497][ T11] dump_stack_lvl+0x82/0xd0 [ 19.932639][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 19.932812][ T11] ? cleanup_net+0xa5d/0xb90 [ 19.932951][ T11] print_report+0xb4/0x270 [ 19.933095][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 19.933231][ T11] kasan_report+0xbd/0xf0 [ 19.933340][ T11] ? cleanup_net+0xa5d/0xb90 [ 19.933480][ T11] cleanup_net+0xa5d/0xb90 [ 19.933615][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 19.933756][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 19.933895][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 19.934033][ T11] ? lock_acquire+0x32/0xc0 [ 19.934171][ T11] ? process_one_work+0xe0b/0x16d0 [ 19.934310][ T11] process_one_work+0xe55/0x16d0 [ 19.934450][ T11] ? __pfx___lock_release+0x10/0x10 [ 19.934590][ T11] ? __pfx_process_one_work+0x10/0x10 [ 19.934727][ T11] ? assign_work+0x16c/0x240 [ 19.934861][ T11] worker_thread+0x58c/0xce0 [ 19.934999][ T11] ? __pfx_worker_thread+0x10/0x10 [ 19.935130][ T11] kthread+0x28a/0x350 [ 19.935236][ T11] ? __pfx_kthread+0x10/0x10 [ 19.935373][ T11] ret_from_fork+0x31/0x70 [ 19.935509][ T11] ? __pfx_kthread+0x10/0x10 [ 19.935645][ T11] ret_from_fork_asm+0x1a/0x30 [ 19.935788][ T11] [ 19.935891][ T11] [ 19.935957][ T11] Allocated by task 257: [ 19.936063][ T11] kasan_save_stack+0x24/0x50 [ 19.936198][ T11] kasan_save_track+0x14/0x30 [ 19.936331][ T11] __kasan_slab_alloc+0x59/0x70 [ 19.936461][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 19.936600][ T11] copy_net_ns+0xc6/0x540 [ 19.936702][ T11] create_new_namespaces+0x35f/0x920 [ 19.936840][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 19.936973][ T11] ksys_unshare+0x2c4/0x6e0 [ 19.937127][ T11] __x64_sys_unshare+0x31/0x40 [ 19.937264][ T11] do_syscall_64+0xc1/0x1d0 [ 19.937401][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 19.937572][ T11] [ 19.937640][ T11] Freed by task 11: [ 19.937743][ T11] kasan_save_stack+0x24/0x50 [ 19.937883][ T11] kasan_save_track+0x14/0x30 [ 19.938020][ T11] kasan_save_free_info+0x3b/0x60 [ 19.938153][ T11] __kasan_slab_free+0x38/0x50 [ 19.938299][ T11] kmem_cache_free+0xf8/0x330 [ 19.938434][ T11] cleanup_net+0x5a8/0xb90 [ 19.938567][ T11] process_one_work+0xe55/0x16d0 [ 19.938712][ T11] worker_thread+0x58c/0xce0 [ 19.938847][ T11] kthread+0x28a/0x350 [ 19.938957][ T11] ret_from_fork+0x31/0x70 [ 19.939116][ T11] ret_from_fork_asm+0x1a/0x30 [ 19.939253][ T11] [ 19.939323][ T11] Last potentially related work creation: [ 19.939461][ T11] kasan_save_stack+0x24/0x50 [ 19.939601][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 19.939740][ T11] insert_work+0x34/0x230 [ 19.939843][ T11] __queue_work+0x5fd/0xa40 [ 19.939981][ T11] queue_delayed_work_on+0x8c/0xa0 [ 19.940121][ T11] __inet_insert_ifa+0x751/0xb10 [ 19.940270][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 19.940406][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 19.940543][ T11] netlink_rcv_skb+0x130/0x360 [ 19.940680][ T11] netlink_unicast+0x44b/0x710 [ 19.940815][ T11] netlink_sendmsg+0x723/0xbe0 [ 19.940953][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 19.941089][ T11] ___sys_sendmsg+0xee/0x170 [ 19.941226][ T11] __sys_sendmsg+0x109/0x1a0 [ 19.941364][ T11] do_syscall_64+0xc1/0x1d0 [ 19.941498][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 19.941667][ T11] [ 19.941736][ T11] Second to last potentially related work creation: [ 19.941900][ T11] kasan_save_stack+0x24/0x50 [ 19.942031][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 19.942169][ T11] insert_work+0x34/0x230 [ 19.942273][ T11] __queue_work+0x5fd/0xa40 [ 19.942425][ T11] queue_delayed_work_on+0x8c/0xa0 [ 19.942560][ T11] __inet_insert_ifa+0x751/0xb10 [ 19.942704][ T11] inetdev_event+0xb18/0xcf0 [ 19.942843][ T11] notifier_call_chain+0xcd/0x150 [ 19.942981][ T11] __dev_notify_flags+0xe6/0x250 [ 19.943117][ T11] dev_change_flags+0xec/0x160 [ 19.943252][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 19.943390][ T11] rtnl_newlink+0x6de/0xa80 [ 19.943534][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 19.943672][ T11] netlink_rcv_skb+0x130/0x360 [ 19.943808][ T11] netlink_unicast+0x44b/0x710 [ 19.943945][ T11] netlink_sendmsg+0x723/0xbe0 [ 19.944084][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 19.944214][ T11] ___sys_sendmsg+0xee/0x170 [ 19.944355][ T11] __sys_sendmsg+0x109/0x1a0 [ 19.944494][ T11] do_syscall_64+0xc1/0x1d0 [ 19.944629][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 19.944794][ T11] [ 19.944863][ T11] The buggy address belongs to the object at ffff88800c251b40 [ 19.944863][ T11] which belongs to the cache net_namespace of size 6528 [ 19.945223][ T11] The buggy address is located 184 bytes inside of [ 19.945223][ T11] freed 6528-byte region [ffff88800c251b40, ffff88800c2534c0) [ 19.945547][ T11] [ 19.945617][ T11] The buggy address belongs to the physical page: [ 19.945785][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800c253640 pfn:0xc250 [ 19.946060][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 19.946267][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 19.946440][ T11] page_type: f5(slab) [ 19.946551][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 19.946797][ T11] raw: ffff88800c253640 0000000000040002 00000001f5000000 0000000000000000 [ 19.947037][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 19.947281][ T11] head: ffff88800c253640 0000000000040002 00000001f5000000 0000000000000000 [ 19.947519][ T11] head: 0080000000000003 ffffea0000309401 ffffffffffffffff 0000000000000000 [ 19.947769][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 19.948005][ T11] page dumped because: kasan: bad access detected [ 19.948169][ T11] [ 19.948239][ T11] Memory state around the buggy address: [ 19.948372][ T11] ffff88800c251a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.948571][ T11] ffff88800c251b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 19.948770][ T11] >ffff88800c251b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.948991][ T11] ^ [ 19.949213][ T11] ffff88800c251c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.949411][ T11] ffff88800c251c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.949610][ T11] ================================================================== [ 19.949854][ T11] Disabling lock debugging due to kernel taint