[ 12.179050][ T252] ip (252) used greatest stack depth: 24344 bytes left [ 27.662943][ T11] ================================================================== [ 27.664190][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 27.665601][ T11] Read of size 8 at addr ffff8880029980f8 by task kworker/u16:0/11 [ 27.666695][ T11] [ 27.666772][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 27.667072][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 27.667330][ T11] Workqueue: netns cleanup_net [ 27.667517][ T11] Call Trace: [ 27.667668][ T11] [ 27.667905][ T11] dump_stack_lvl+0x82/0xd0 [ 27.668225][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 27.668563][ T11] ? cleanup_net+0x932/0xa40 [ 27.668754][ T11] print_report+0xb4/0x270 [ 27.669052][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 27.669294][ T11] kasan_report+0xbd/0xf0 [ 27.669425][ T11] ? cleanup_net+0x932/0xa40 [ 27.669678][ T11] cleanup_net+0x932/0xa40 [ 27.670020][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 27.670273][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 27.670486][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 27.670794][ T11] ? lock_acquire+0x32/0xc0 [ 27.671032][ T11] ? process_one_work+0xe0b/0x16d0 [ 27.671196][ T11] process_one_work+0xe55/0x16d0 [ 27.671361][ T11] ? __pfx___lock_release+0x10/0x10 [ 27.671518][ T11] ? __pfx_process_one_work+0x10/0x10 [ 27.671684][ T11] ? assign_work+0x16c/0x240 [ 27.671854][ T11] worker_thread+0x58c/0xce0 [ 27.672220][ T11] ? __pfx_worker_thread+0x10/0x10 [ 27.672439][ T11] kthread+0x28a/0x350 [ 27.672587][ T11] ? __pfx_kthread+0x10/0x10 [ 27.672803][ T11] ret_from_fork+0x31/0x70 [ 27.673039][ T11] ? __pfx_kthread+0x10/0x10 [ 27.673298][ T11] ret_from_fork_asm+0x1a/0x30 [ 27.673525][ T11] [ 27.673703][ T11] [ 27.673850][ T11] Allocated by task 247: [ 27.674020][ T11] kasan_save_stack+0x24/0x50 [ 27.674257][ T11] kasan_save_track+0x14/0x30 [ 27.674475][ T11] __kasan_slab_alloc+0x59/0x70 [ 27.674694][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 27.674864][ T11] copy_net_ns+0xc6/0x340 [ 27.674993][ T11] create_new_namespaces+0x35f/0x920 [ 27.675191][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 27.675372][ T11] ksys_unshare+0x2a9/0x660 [ 27.675560][ T11] __x64_sys_unshare+0x31/0x40 [ 27.675717][ T11] do_syscall_64+0xc1/0x1d0 [ 27.675894][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 27.676142][ T11] [ 27.676221][ T11] Freed by task 11: [ 27.676370][ T11] kasan_save_stack+0x24/0x50 [ 27.676538][ T11] kasan_save_track+0x14/0x30 [ 27.676731][ T11] kasan_save_free_info+0x3b/0x60 [ 27.676905][ T11] __kasan_slab_free+0x38/0x50 [ 27.677094][ T11] kmem_cache_free+0xf8/0x330 [ 27.677292][ T11] cleanup_net+0x5a8/0xa40 [ 27.677460][ T11] process_one_work+0xe55/0x16d0 [ 27.677635][ T11] worker_thread+0x58c/0xce0 [ 27.677799][ T11] kthread+0x28a/0x350 [ 27.677917][ T11] ret_from_fork+0x31/0x70 [ 27.678127][ T11] ret_from_fork_asm+0x1a/0x30 [ 27.678382][ T11] [ 27.678519][ T11] Last potentially related work creation: [ 27.678780][ T11] kasan_save_stack+0x24/0x50 [ 27.679014][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 27.679262][ T11] insert_work+0x34/0x230 [ 27.679465][ T11] __queue_work+0x5fd/0xa40 [ 27.679715][ T11] queue_delayed_work_on+0x8c/0xa0 [ 27.679983][ T11] __inet_insert_ifa+0x751/0xb10 [ 27.680243][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 27.680459][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 27.680684][ T11] netlink_rcv_skb+0x130/0x360 [ 27.680892][ T11] netlink_unicast+0x44b/0x710 [ 27.681111][ T11] netlink_sendmsg+0x723/0xbe0 [ 27.681313][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 27.681728][ T11] ___sys_sendmsg+0xee/0x170 [ 27.682153][ T11] __sys_sendmsg+0x109/0x1a0 [ 27.682595][ T11] do_syscall_64+0xc1/0x1d0 [ 27.683022][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 27.683551][ T11] [ 27.683743][ T11] Second to last potentially related work creation: [ 27.684035][ T11] kasan_save_stack+0x24/0x50 [ 27.684233][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 27.684642][ T11] insert_work+0x34/0x230 [ 27.684937][ T11] __queue_work+0x5fd/0xa40 [ 27.685173][ T11] queue_delayed_work_on+0x8c/0xa0 [ 27.685393][ T11] __inet_insert_ifa+0x751/0xb10 [ 27.685601][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 27.685924][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 27.686342][ T11] netlink_rcv_skb+0x130/0x360 [ 27.686754][ T11] netlink_unicast+0x44b/0x710 [ 27.687137][ T11] netlink_sendmsg+0x723/0xbe0 [ 27.687391][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 27.687645][ T11] ___sys_sendmsg+0xee/0x170 [ 27.687946][ T11] __sys_sendmsg+0x109/0x1a0 [ 27.688240][ T11] do_syscall_64+0xc1/0x1d0 [ 27.688562][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 27.688998][ T11] [ 27.689163][ T11] The buggy address belongs to the object at ffff888002998040 [ 27.689163][ T11] which belongs to the cache net_namespace of size 6592 [ 27.689876][ T11] The buggy address is located 184 bytes inside of [ 27.689876][ T11] freed 6592-byte region [ffff888002998040, ffff888002999a00) [ 27.690325][ T11] [ 27.690542][ T11] The buggy address belongs to the physical page: [ 27.691105][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800299b6c0 pfn:0x2998 [ 27.692018][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 27.692705][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 27.693212][ T11] page_type: f5(slab) [ 27.693536][ T11] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 27.694085][ T11] raw: ffff88800299b6c0 0000000000040002 00000001f5000000 0000000000000000 [ 27.694626][ T11] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 27.695051][ T11] head: ffff88800299b6c0 0000000000040002 00000001f5000000 0000000000000000 [ 27.695398][ T11] head: 0080000000000003 ffffea00000a6601 ffffffffffffffff 0000000000000000 [ 27.695787][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 27.696182][ T11] page dumped because: kasan: bad access detected [ 27.696448][ T11] [ 27.696557][ T11] Memory state around the buggy address: [ 27.696757][ T11] ffff888002997f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.697054][ T11] ffff888002998000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 27.697353][ T11] >ffff888002998080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.697651][ T11] ^ [ 27.697940][ T11] ffff888002998100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.698236][ T11] ffff888002998180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.698528][ T11] ================================================================== [ 27.698838][ T11] Disabling lock debugging due to kernel taint