[ 23.163817][ T11] ================================================================== [ 23.164068][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 23.164292][ T11] Read of size 8 at addr ffff88800cc680f8 by task kworker/u16:0/11 [ 23.164496][ T11] [ 23.164574][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 23.164790][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 23.164970][ T11] Workqueue: netns cleanup_net [ 23.165119][ T11] Call Trace: [ 23.165229][ T11] [ 23.165309][ T11] dump_stack_lvl+0x82/0xd0 [ 23.165466][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 23.165650][ T11] ? cleanup_net+0xa5d/0xb90 [ 23.165795][ T11] print_report+0xb4/0x270 [ 23.165939][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 23.166082][ T11] kasan_report+0xbd/0xf0 [ 23.166190][ T11] ? cleanup_net+0xa5d/0xb90 [ 23.166334][ T11] cleanup_net+0xa5d/0xb90 [ 23.166477][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 23.166629][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 23.166772][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 23.166923][ T11] ? lock_acquire+0x32/0xc0 [ 23.167072][ T11] ? process_one_work+0xe0b/0x16d0 [ 23.167218][ T11] process_one_work+0xe55/0x16d0 [ 23.167374][ T11] ? __pfx___lock_release+0x10/0x10 [ 23.167523][ T11] ? __pfx_process_one_work+0x10/0x10 [ 23.167670][ T11] ? assign_work+0x16c/0x240 [ 23.167815][ T11] worker_thread+0x58c/0xce0 [ 23.167960][ T11] ? __pfx_worker_thread+0x10/0x10 [ 23.168107][ T11] kthread+0x28a/0x350 [ 23.168222][ T11] ? __pfx_kthread+0x10/0x10 [ 23.168366][ T11] ret_from_fork+0x31/0x70 [ 23.168509][ T11] ? __pfx_kthread+0x10/0x10 [ 23.168653][ T11] ret_from_fork_asm+0x1a/0x30 [ 23.168798][ T11] [ 23.168907][ T11] [ 23.168983][ T11] Allocated by task 266: [ 23.169092][ T11] kasan_save_stack+0x24/0x50 [ 23.169237][ T11] kasan_save_track+0x14/0x30 [ 23.169378][ T11] __kasan_slab_alloc+0x59/0x70 [ 23.169522][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 23.169673][ T11] copy_net_ns+0xc6/0x540 [ 23.169780][ T11] create_new_namespaces+0x35f/0x920 [ 23.169923][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 23.170068][ T11] ksys_unshare+0x2c4/0x6e0 [ 23.170210][ T11] __x64_sys_unshare+0x31/0x40 [ 23.170357][ T11] do_syscall_64+0xc1/0x1d0 [ 23.170506][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.170688][ T11] [ 23.170763][ T11] Freed by task 11: [ 23.170872][ T11] kasan_save_stack+0x24/0x50 [ 23.171017][ T11] kasan_save_track+0x14/0x30 [ 23.171158][ T11] kasan_save_free_info+0x3b/0x60 [ 23.171302][ T11] __kasan_slab_free+0x38/0x50 [ 23.171445][ T11] kmem_cache_free+0xf8/0x330 [ 23.171591][ T11] cleanup_net+0x5a8/0xb90 [ 23.171732][ T11] process_one_work+0xe55/0x16d0 [ 23.171906][ T11] worker_thread+0x58c/0xce0 [ 23.172052][ T11] kthread+0x28a/0x350 [ 23.172162][ T11] ret_from_fork+0x31/0x70 [ 23.172303][ T11] ret_from_fork_asm+0x1a/0x30 [ 23.172442][ T11] [ 23.172515][ T11] Last potentially related work creation: [ 23.172658][ T11] kasan_save_stack+0x24/0x50 [ 23.172801][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 23.172951][ T11] insert_work+0x34/0x230 [ 23.173058][ T11] __queue_work+0x5fd/0xa40 [ 23.173199][ T11] queue_delayed_work_on+0x8c/0xa0 [ 23.173340][ T11] __inet_insert_ifa+0x751/0xb10 [ 23.173484][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 23.173629][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 23.173771][ T11] netlink_rcv_skb+0x130/0x360 [ 23.173915][ T11] netlink_unicast+0x44b/0x710 [ 23.174066][ T11] netlink_sendmsg+0x723/0xbe0 [ 23.174208][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 23.174352][ T11] ___sys_sendmsg+0xee/0x170 [ 23.174494][ T11] __sys_sendmsg+0x109/0x1a0 [ 23.174635][ T11] do_syscall_64+0xc1/0x1d0 [ 23.174776][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.174955][ T11] [ 23.175027][ T11] Second to last potentially related work creation: [ 23.175207][ T11] kasan_save_stack+0x24/0x50 [ 23.175350][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 23.175502][ T11] insert_work+0x34/0x230 [ 23.175617][ T11] __queue_work+0x5fd/0xa40 [ 23.175756][ T11] queue_delayed_work_on+0x8c/0xa0 [ 23.175899][ T11] __inet_insert_ifa+0x751/0xb10 [ 23.176040][ T11] inetdev_event+0xb18/0xcf0 [ 23.176181][ T11] notifier_call_chain+0xcd/0x150 [ 23.176331][ T11] __dev_notify_flags+0xe6/0x250 [ 23.176476][ T11] dev_change_flags+0xec/0x160 [ 23.176617][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 23.176759][ T11] rtnl_newlink+0x6de/0xa80 [ 23.176900][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 23.177045][ T11] netlink_rcv_skb+0x130/0x360 [ 23.177186][ T11] netlink_unicast+0x44b/0x710 [ 23.177330][ T11] netlink_sendmsg+0x723/0xbe0 [ 23.177481][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 23.177623][ T11] ___sys_sendmsg+0xee/0x170 [ 23.177766][ T11] __sys_sendmsg+0x109/0x1a0 [ 23.177909][ T11] do_syscall_64+0xc1/0x1d0 [ 23.178057][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.178235][ T11] [ 23.178308][ T11] The buggy address belongs to the object at ffff88800cc68040 [ 23.178308][ T11] which belongs to the cache net_namespace of size 6528 [ 23.178688][ T11] The buggy address is located 184 bytes inside of [ 23.178688][ T11] freed 6528-byte region [ffff88800cc68040, ffff88800cc699c0) [ 23.179028][ T11] [ 23.179102][ T11] The buggy address belongs to the physical page: [ 23.179279][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800cc6d140 pfn:0xcc68 [ 23.179568][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 23.179786][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 23.179968][ T11] page_type: f5(slab) [ 23.180082][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 23.180336][ T11] raw: ffff88800cc6d140 0000000000040003 00000001f5000000 0000000000000000 [ 23.180592][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 23.180846][ T11] head: ffff88800cc6d140 0000000000040003 00000001f5000000 0000000000000000 [ 23.181099][ T11] head: 0080000000000003 ffffea0000331a01 ffffffffffffffff 0000000000000000 [ 23.181344][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 23.181595][ T11] page dumped because: kasan: bad access detected [ 23.181768][ T11] [ 23.181841][ T11] Memory state around the buggy address: [ 23.181979][ T11] ffff88800cc67f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.182190][ T11] ffff88800cc68000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.182396][ T11] >ffff88800cc68080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.182602][ T11] ^ [ 23.182807][ T11] ffff88800cc68100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.183010][ T11] ffff88800cc68180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.183214][ T11] ================================================================== [ 23.183482][ T11] Disabling lock debugging due to kernel taint