[ 11.583818][ T263] ip (263) used greatest stack depth: 23992 bytes left [ 52.717136][ T66] ================================================================== [ 52.717349][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 52.717542][ T66] Read of size 8 at addr ffff88800a7280f8 by task kworker/u16:1/66 [ 52.717720][ T66] [ 52.717785][ T66] CPU: 3 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 52.717976][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 52.718132][ T66] Workqueue: netns cleanup_net [ 52.718266][ T66] Call Trace: [ 52.718365][ T66] [ 52.718434][ T66] dump_stack_lvl+0x82/0xd0 [ 52.718569][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 52.718727][ T66] ? cleanup_net+0x932/0xa40 [ 52.718857][ T66] print_report+0xb4/0x270 [ 52.718984][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 52.719115][ T66] kasan_report+0xbd/0xf0 [ 52.719213][ T66] ? cleanup_net+0x932/0xa40 [ 52.719354][ T66] cleanup_net+0x932/0xa40 [ 52.719483][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 52.719610][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 52.719733][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 52.719859][ T66] ? lock_acquire+0x32/0xc0 [ 52.719986][ T66] ? process_one_work+0xe0b/0x16d0 [ 52.720118][ T66] process_one_work+0xe55/0x16d0 [ 52.720249][ T66] ? __pfx___lock_release+0x10/0x10 [ 52.720376][ T66] ? __pfx_process_one_work+0x10/0x10 [ 52.720505][ T66] ? assign_work+0x16c/0x240 [ 52.720631][ T66] worker_thread+0x58c/0xce0 [ 52.720758][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 52.720915][ T66] ? __pfx_worker_thread+0x10/0x10 [ 52.721042][ T66] ? __pfx_worker_thread+0x10/0x10 [ 52.721172][ T66] kthread+0x28a/0x350 [ 52.721269][ T66] ? __pfx_kthread+0x10/0x10 [ 52.721395][ T66] ret_from_fork+0x31/0x70 [ 52.721521][ T66] ? __pfx_kthread+0x10/0x10 [ 52.721646][ T66] ret_from_fork_asm+0x1a/0x30 [ 52.721778][ T66] [ 52.721876][ T66] [ 52.721940][ T66] Allocated by task 245: [ 52.722035][ T66] kasan_save_stack+0x24/0x50 [ 52.722162][ T66] kasan_save_track+0x14/0x30 [ 52.722284][ T66] __kasan_slab_alloc+0x59/0x70 [ 52.722406][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 52.722531][ T66] copy_net_ns+0xc6/0x340 [ 52.722624][ T66] create_new_namespaces+0x35f/0x920 [ 52.722753][ T66] unshare_nsproxy_namespaces+0x8d/0x130 [ 52.722880][ T66] ksys_unshare+0x2a9/0x660 [ 52.723006][ T66] __x64_sys_unshare+0x31/0x40 [ 52.723131][ T66] do_syscall_64+0xc1/0x1d0 [ 52.723265][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 52.723423][ T66] [ 52.723486][ T66] Freed by task 66: [ 52.723583][ T66] kasan_save_stack+0x24/0x50 [ 52.723710][ T66] kasan_save_track+0x14/0x30 [ 52.723832][ T66] kasan_save_free_info+0x3b/0x60 [ 52.723957][ T66] __kasan_slab_free+0x38/0x50 [ 52.724082][ T66] kmem_cache_free+0xf8/0x330 [ 52.724207][ T66] cleanup_net+0x5a8/0xa40 [ 52.724328][ T66] process_one_work+0xe55/0x16d0 [ 52.724451][ T66] worker_thread+0x58c/0xce0 [ 52.724571][ T66] kthread+0x28a/0x350 [ 52.724668][ T66] ret_from_fork+0x31/0x70 [ 52.724791][ T66] ret_from_fork_asm+0x1a/0x30 [ 52.724913][ T66] [ 52.724978][ T66] Last potentially related work creation: [ 52.725105][ T66] kasan_save_stack+0x24/0x50 [ 52.725234][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 52.725361][ T66] insert_work+0x34/0x230 [ 52.725459][ T66] __queue_work+0x5fd/0xa40 [ 52.725584][ T66] queue_delayed_work_on+0x8c/0xa0 [ 52.725710][ T66] __inet_insert_ifa+0x751/0xb10 [ 52.725836][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 52.725961][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 52.726088][ T66] netlink_rcv_skb+0x130/0x360 [ 52.726216][ T66] netlink_unicast+0x44b/0x710 [ 52.726342][ T66] netlink_sendmsg+0x723/0xbe0 [ 52.726467][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 52.726594][ T66] ___sys_sendmsg+0xee/0x170 [ 52.726723][ T66] __sys_sendmsg+0x109/0x1a0 [ 52.726847][ T66] do_syscall_64+0xc1/0x1d0 [ 52.726971][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 52.727128][ T66] [ 52.727195][ T66] Second to last potentially related work creation: [ 52.727353][ T66] kasan_save_stack+0x24/0x50 [ 52.727480][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 52.727606][ T66] insert_work+0x34/0x230 [ 52.727704][ T66] __queue_work+0x5fd/0xa40 [ 52.727829][ T66] queue_delayed_work_on+0x8c/0xa0 [ 52.727956][ T66] __inet_insert_ifa+0x751/0xb10 [ 52.728084][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 52.728213][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 52.728337][ T66] netlink_rcv_skb+0x130/0x360 [ 52.728461][ T66] netlink_unicast+0x44b/0x710 [ 52.728594][ T66] netlink_sendmsg+0x723/0xbe0 [ 52.728720][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 52.728846][ T66] ___sys_sendmsg+0xee/0x170 [ 52.728971][ T66] __sys_sendmsg+0x109/0x1a0 [ 52.729097][ T66] do_syscall_64+0xc1/0x1d0 [ 52.729221][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 52.729388][ T66] [ 52.729452][ T66] The buggy address belongs to the object at ffff88800a728040 [ 52.729452][ T66] which belongs to the cache net_namespace of size 6080 [ 52.729783][ T66] The buggy address is located 184 bytes inside of [ 52.729783][ T66] freed 6080-byte region [ffff88800a728040, ffff88800a729800) [ 52.730097][ T66] [ 52.730162][ T66] The buggy address belongs to the physical page: [ 52.730313][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a72cc00 pfn:0xa728 [ 52.730566][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 52.730753][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 52.730917][ T66] page_type: f5(slab) [ 52.731016][ T66] raw: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 52.731237][ T66] raw: ffff88800a72cc00 0000000000050003 00000001f5000000 0000000000000000 [ 52.731457][ T66] head: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 52.731677][ T66] head: ffff88800a72cc00 0000000000050003 00000001f5000000 0000000000000000 [ 52.731899][ T66] head: 0080000000000003 ffffea000029ca01 ffffffffffffffff 0000000000000000 [ 52.732118][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 52.732335][ T66] page dumped because: kasan: bad access detected [ 52.732489][ T66] [ 52.732553][ T66] Memory state around the buggy address: [ 52.732680][ T66] ffff88800a727f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 52.732863][ T66] ffff88800a728000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 52.733044][ T66] >ffff88800a728080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.733224][ T66] ^ [ 52.733402][ T66] ffff88800a728100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.733585][ T66] ffff88800a728180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.733759][ T66] ================================================================== [ 52.733956][ T66] Disabling lock debugging due to kernel taint