[ 17.255369][ T298] ip (298) used greatest stack depth: 23568 bytes left [ 92.894568][ T11] ================================================================== [ 92.894890][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 92.895166][ T11] Read of size 8 at addr ffff888008e700f8 by task kworker/u16:0/11 [ 92.895412][ T11] [ 92.895503][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 92.895789][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 92.896025][ T11] Workqueue: netns cleanup_net [ 92.896226][ T11] Call Trace: [ 92.896368][ T11] [ 92.896473][ T11] dump_stack_lvl+0x82/0xd0 [ 92.896667][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 92.896917][ T11] ? cleanup_net+0xa5d/0xb90 [ 92.897114][ T11] print_report+0xb4/0x270 [ 92.897299][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 92.897485][ T11] kasan_report+0xbd/0xf0 [ 92.897627][ T11] ? cleanup_net+0xa5d/0xb90 [ 92.897847][ T11] cleanup_net+0xa5d/0xb90 [ 92.898029][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 92.898218][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 92.898409][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 92.898604][ T11] ? lock_acquire+0x32/0xc0 [ 92.898790][ T11] ? process_one_work+0xe0b/0x16d0 [ 92.898985][ T11] process_one_work+0xe55/0x16d0 [ 92.899175][ T11] ? __pfx___lock_release+0x10/0x10 [ 92.899362][ T11] ? __pfx_process_one_work+0x10/0x10 [ 92.899577][ T11] ? assign_work+0x16c/0x240 [ 92.899771][ T11] worker_thread+0x58c/0xce0 [ 92.899966][ T11] ? __pfx_worker_thread+0x10/0x10 [ 92.900149][ T11] kthread+0x28a/0x350 [ 92.900290][ T11] ? __pfx_kthread+0x10/0x10 [ 92.900478][ T11] ret_from_fork+0x31/0x70 [ 92.900683][ T11] ? __pfx_kthread+0x10/0x10 [ 92.900882][ T11] ret_from_fork_asm+0x1a/0x30 [ 92.901089][ T11] [ 92.901246][ T11] [ 92.901346][ T11] Allocated by task 263: [ 92.901498][ T11] kasan_save_stack+0x24/0x50 [ 92.901700][ T11] kasan_save_track+0x14/0x30 [ 92.901885][ T11] __kasan_slab_alloc+0x59/0x70 [ 92.902068][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 92.902255][ T11] copy_net_ns+0xc6/0x540 [ 92.902399][ T11] create_new_namespaces+0x35f/0x920 [ 92.902585][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 92.902769][ T11] ksys_unshare+0x2c4/0x6e0 [ 92.902981][ T11] __x64_sys_unshare+0x31/0x40 [ 92.903167][ T11] do_syscall_64+0xc1/0x1d0 [ 92.903358][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 92.903592][ T11] [ 92.903691][ T11] Freed by task 11: [ 92.903830][ T11] kasan_save_stack+0x24/0x50 [ 92.904019][ T11] kasan_save_track+0x14/0x30 [ 92.904216][ T11] kasan_save_free_info+0x3b/0x60 [ 92.904403][ T11] __kasan_slab_free+0x38/0x50 [ 92.904588][ T11] kmem_cache_free+0xf8/0x330 [ 92.904775][ T11] cleanup_net+0x5a8/0xb90 [ 92.904957][ T11] process_one_work+0xe55/0x16d0 [ 92.905141][ T11] worker_thread+0x58c/0xce0 [ 92.905326][ T11] kthread+0x28a/0x350 [ 92.905465][ T11] ret_from_fork+0x31/0x70 [ 92.905649][ T11] ret_from_fork_asm+0x1a/0x30 [ 92.905830][ T11] [ 92.905924][ T11] Last potentially related work creation: [ 92.906055][ T11] kasan_save_stack+0x24/0x50 [ 92.906189][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 92.906344][ T11] insert_work+0x34/0x230 [ 92.906466][ T11] __queue_work+0x5fd/0xa40 [ 92.906627][ T11] queue_delayed_work_on+0x8c/0xa0 [ 92.906820][ T11] __inet_insert_ifa+0x751/0xb10 [ 92.907021][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 92.907211][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 92.907403][ T11] netlink_rcv_skb+0x130/0x360 [ 92.907595][ T11] netlink_unicast+0x44b/0x710 [ 92.907780][ T11] netlink_sendmsg+0x723/0xbe0 [ 92.907969][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 92.908164][ T11] ___sys_sendmsg+0xee/0x170 [ 92.908356][ T11] __sys_sendmsg+0x109/0x1a0 [ 92.908548][ T11] do_syscall_64+0xc1/0x1d0 [ 92.908733][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 92.908968][ T11] [ 92.909069][ T11] Second to last potentially related work creation: [ 92.909335][ T11] kasan_save_stack+0x24/0x50 [ 92.909525][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 92.909712][ T11] insert_work+0x34/0x230 [ 92.909874][ T11] __queue_work+0x5fd/0xa40 [ 92.910085][ T11] queue_delayed_work_on+0x8c/0xa0 [ 92.910306][ T11] __inet_insert_ifa+0x751/0xb10 [ 92.910506][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 92.910705][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 92.910902][ T11] netlink_rcv_skb+0x130/0x360 [ 92.911100][ T11] netlink_unicast+0x44b/0x710 [ 92.911299][ T11] netlink_sendmsg+0x723/0xbe0 [ 92.911496][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 92.911691][ T11] ___sys_sendmsg+0xee/0x170 [ 92.911894][ T11] __sys_sendmsg+0x109/0x1a0 [ 92.912096][ T11] do_syscall_64+0xc1/0x1d0 [ 92.912334][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 92.912563][ T11] [ 92.912666][ T11] The buggy address belongs to the object at ffff888008e70040 [ 92.912666][ T11] which belongs to the cache net_namespace of size 6528 [ 92.913223][ T11] The buggy address is located 184 bytes inside of [ 92.913223][ T11] freed 6528-byte region [ffff888008e70040, ffff888008e719c0) [ 92.913729][ T11] [ 92.913830][ T11] The buggy address belongs to the physical page: [ 92.914066][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888008e75140 pfn:0x8e70 [ 92.914496][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 92.914795][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 92.915047][ T11] page_type: f5(slab) [ 92.915206][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 92.915591][ T11] raw: ffff888008e75140 0000000000040003 00000001f5000000 0000000000000000 [ 92.915938][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 92.916288][ T11] head: ffff888008e75140 0000000000040003 00000001f5000000 0000000000000000 [ 92.916620][ T11] head: 0080000000000003 ffffea0000239c01 ffffffffffffffff 0000000000000000 [ 92.916895][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 92.917115][ T11] page dumped because: kasan: bad access detected [ 92.917345][ T11] [ 92.917421][ T11] Memory state around the buggy address: [ 92.917566][ T11] ffff888008e6ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 92.917831][ T11] ffff888008e70000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 92.918135][ T11] >ffff888008e70080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 92.918420][ T11] ^ [ 92.918701][ T11] ffff888008e70100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 92.918987][ T11] ffff888008e70180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 92.919267][ T11] ================================================================== [ 92.919828][ T11] Disabling lock debugging due to kernel taint [ 149.380059][ T1397] mpls_gso: MPLS GSO support