[ 14.451472][ T280] ip (280) used greatest stack depth: 23856 bytes left [ 23.894357][ T69] ================================================================== [ 23.894595][ T69] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 23.894798][ T69] Read of size 8 at addr ffff8880094200f8 by task kworker/u16:1/69 [ 23.894992][ T69] [ 23.895065][ T69] CPU: 1 UID: 0 PID: 69 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 23.895273][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 23.895440][ T69] Workqueue: netns cleanup_net [ 23.895578][ T69] Call Trace: [ 23.895678][ T69] [ 23.895749][ T69] dump_stack_lvl+0x82/0xd0 [ 23.895892][ T69] print_address_description.constprop.0+0x2c/0x3b0 [ 23.896063][ T69] ? cleanup_net+0x932/0xa40 [ 23.896198][ T69] print_report+0xb4/0x270 [ 23.896329][ T69] ? kasan_addr_to_slab+0x25/0x80 [ 23.896471][ T69] kasan_report+0xbd/0xf0 [ 23.896574][ T69] ? cleanup_net+0x932/0xa40 [ 23.896718][ T69] cleanup_net+0x932/0xa40 [ 23.896856][ T69] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 23.896994][ T69] ? __pfx_cleanup_net+0x10/0x10 [ 23.897126][ T69] ? trace_lock_acquire+0x148/0x1f0 [ 23.897258][ T69] ? lock_acquire+0x32/0xc0 [ 23.897387][ T69] ? process_one_work+0xe0b/0x16d0 [ 23.897525][ T69] process_one_work+0xe55/0x16d0 [ 23.897660][ T69] ? __pfx___lock_release+0x10/0x10 [ 23.897795][ T69] ? __pfx_process_one_work+0x10/0x10 [ 23.897930][ T69] ? assign_work+0x16c/0x240 [ 23.898069][ T69] worker_thread+0x58c/0xce0 [ 23.898204][ T69] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 23.898373][ T69] ? __pfx_worker_thread+0x10/0x10 [ 23.898507][ T69] ? __pfx_worker_thread+0x10/0x10 [ 23.898640][ T69] kthread+0x28a/0x350 [ 23.898748][ T69] ? __pfx_kthread+0x10/0x10 [ 23.898887][ T69] ret_from_fork+0x31/0x70 [ 23.899025][ T69] ? __pfx_kthread+0x10/0x10 [ 23.899161][ T69] ret_from_fork_asm+0x1a/0x30 [ 23.899303][ T69] [ 23.899407][ T69] [ 23.899474][ T69] Allocated by task 250: [ 23.899575][ T69] kasan_save_stack+0x24/0x50 [ 23.899705][ T69] kasan_save_track+0x14/0x30 [ 23.899838][ T69] __kasan_slab_alloc+0x59/0x70 [ 23.899990][ T69] kmem_cache_alloc_noprof+0x10b/0x350 [ 23.900121][ T69] copy_net_ns+0xc6/0x340 [ 23.900221][ T69] create_new_namespaces+0x35f/0x920 [ 23.900353][ T69] unshare_nsproxy_namespaces+0x8d/0x130 [ 23.900484][ T69] ksys_unshare+0x2a9/0x660 [ 23.900618][ T69] __x64_sys_unshare+0x31/0x40 [ 23.900748][ T69] do_syscall_64+0xc1/0x1d0 [ 23.900886][ T69] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.901050][ T69] [ 23.901116][ T69] Freed by task 69: [ 23.901216][ T69] kasan_save_stack+0x24/0x50 [ 23.901348][ T69] kasan_save_track+0x14/0x30 [ 23.901477][ T69] kasan_save_free_info+0x3b/0x60 [ 23.901609][ T69] __kasan_slab_free+0x38/0x50 [ 23.901738][ T69] kmem_cache_free+0xf8/0x330 [ 23.901873][ T69] cleanup_net+0x5a8/0xa40 [ 23.902001][ T69] process_one_work+0xe55/0x16d0 [ 23.902127][ T69] worker_thread+0x58c/0xce0 [ 23.902256][ T69] kthread+0x28a/0x350 [ 23.902354][ T69] ret_from_fork+0x31/0x70 [ 23.902485][ T69] ret_from_fork_asm+0x1a/0x30 [ 23.902613][ T69] [ 23.902679][ T69] Last potentially related work creation: [ 23.902808][ T69] kasan_save_stack+0x24/0x50 [ 23.902947][ T69] __kasan_record_aux_stack+0x8e/0xa0 [ 23.903079][ T69] insert_work+0x34/0x230 [ 23.903179][ T69] __queue_work+0x5fd/0xa40 [ 23.903309][ T69] queue_delayed_work_on+0x8c/0xa0 [ 23.903441][ T69] __inet_insert_ifa+0x751/0xb10 [ 23.903574][ T69] inet_rtm_newaddr+0x833/0xbd0 [ 23.903705][ T69] rtnetlink_rcv_msg+0x712/0xc10 [ 23.903842][ T69] netlink_rcv_skb+0x130/0x360 [ 23.903978][ T69] netlink_unicast+0x44b/0x710 [ 23.904109][ T69] netlink_sendmsg+0x723/0xbe0 [ 23.904241][ T69] ____sys_sendmsg+0x7ac/0xa10 [ 23.904375][ T69] ___sys_sendmsg+0xee/0x170 [ 23.904509][ T69] __sys_sendmsg+0x109/0x1a0 [ 23.904640][ T69] do_syscall_64+0xc1/0x1d0 [ 23.904772][ T69] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.904939][ T69] [ 23.905007][ T69] Second to last potentially related work creation: [ 23.905169][ T69] kasan_save_stack+0x24/0x50 [ 23.905302][ T69] __kasan_record_aux_stack+0x8e/0xa0 [ 23.905434][ T69] insert_work+0x34/0x230 [ 23.905535][ T69] __queue_work+0x5fd/0xa40 [ 23.905667][ T69] queue_delayed_work_on+0x8c/0xa0 [ 23.905805][ T69] __inet_insert_ifa+0x751/0xb10 [ 23.905939][ T69] inet_rtm_newaddr+0x833/0xbd0 [ 23.906070][ T69] rtnetlink_rcv_msg+0x712/0xc10 [ 23.906204][ T69] netlink_rcv_skb+0x130/0x360 [ 23.906336][ T69] netlink_unicast+0x44b/0x710 [ 23.906468][ T69] netlink_sendmsg+0x723/0xbe0 [ 23.906612][ T69] ____sys_sendmsg+0x7ac/0xa10 [ 23.906813][ T69] ___sys_sendmsg+0xee/0x170 [ 23.906943][ T69] __sys_sendmsg+0x109/0x1a0 [ 23.907079][ T69] do_syscall_64+0xc1/0x1d0 [ 23.907211][ T69] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.907440][ T69] [ 23.907507][ T69] The buggy address belongs to the object at ffff888009420040 [ 23.907507][ T69] which belongs to the cache net_namespace of size 6592 [ 23.907911][ T69] The buggy address is located 184 bytes inside of [ 23.907911][ T69] freed 6592-byte region [ffff888009420040, ffff888009421a00) [ 23.908225][ T69] [ 23.908292][ T69] The buggy address belongs to the physical page: [ 23.908514][ T69] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009425200 pfn:0x9420 [ 23.908774][ T69] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 23.908970][ T69] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 23.909205][ T69] page_type: f5(slab) [ 23.909309][ T69] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 23.909543][ T69] raw: ffff888009425200 0000000000040003 00000001f5000000 0000000000000000 [ 23.909837][ T69] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 23.910070][ T69] head: ffff888009425200 0000000000040003 00000001f5000000 0000000000000000 [ 23.910359][ T69] head: 0080000000000003 ffffea0000250801 ffffffffffffffff 0000000000000000 [ 23.910584][ T69] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 23.910875][ T69] page dumped because: kasan: bad access detected [ 23.911037][ T69] [ 23.911104][ T69] Memory state around the buggy address: [ 23.911233][ T69] ffff88800941ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.911481][ T69] ffff888009420000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.911666][ T69] >ffff888009420080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.911857][ T69] ^ [ 23.912101][ T69] ffff888009420100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.912288][ T69] ffff888009420180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.912532][ T69] ================================================================== [ 23.912814][ T69] Disabling lock debugging due to kernel taint