[ 52.807339][ T11] ================================================================== [ 52.807663][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 52.807878][ T11] Read of size 8 at addr ffff88800c2980f8 by task kworker/u16:0/11 [ 52.808072][ T11] [ 52.808145][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 52.808357][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 52.808524][ T11] Workqueue: netns cleanup_net [ 52.808680][ T11] Call Trace: [ 52.808787][ T11] [ 52.808863][ T11] dump_stack_lvl+0x82/0xd0 [ 52.809008][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 52.809185][ T11] ? cleanup_net+0x932/0xa40 [ 52.809333][ T11] print_report+0xb4/0x270 [ 52.809470][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 52.809605][ T11] kasan_report+0xbd/0xf0 [ 52.809709][ T11] ? cleanup_net+0x932/0xa40 [ 52.809856][ T11] cleanup_net+0x932/0xa40 [ 52.809998][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 52.810146][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 52.810285][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 52.810430][ T11] ? lock_acquire+0x32/0xc0 [ 52.810568][ T11] ? process_one_work+0xe0b/0x16d0 [ 52.810714][ T11] process_one_work+0xe55/0x16d0 [ 52.810858][ T11] ? __pfx___lock_release+0x10/0x10 [ 52.811000][ T11] ? __pfx_process_one_work+0x10/0x10 [ 52.811145][ T11] ? assign_work+0x16c/0x240 [ 52.811288][ T11] worker_thread+0x58c/0xce0 [ 52.811429][ T11] ? __pfx_worker_thread+0x10/0x10 [ 52.811572][ T11] kthread+0x28a/0x350 [ 52.811682][ T11] ? __pfx_kthread+0x10/0x10 [ 52.811824][ T11] ret_from_fork+0x31/0x70 [ 52.811965][ T11] ? __pfx_kthread+0x10/0x10 [ 52.812109][ T11] ret_from_fork_asm+0x1a/0x30 [ 52.812256][ T11] [ 52.812365][ T11] [ 52.812437][ T11] Allocated by task 245: [ 52.812542][ T11] kasan_save_stack+0x24/0x50 [ 52.812684][ T11] kasan_save_track+0x14/0x30 [ 52.812819][ T11] __kasan_slab_alloc+0x59/0x70 [ 52.812957][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 52.813104][ T11] copy_net_ns+0xc6/0x340 [ 52.813211][ T11] create_new_namespaces+0x35f/0x920 [ 52.813355][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 52.813493][ T11] ksys_unshare+0x2a9/0x660 [ 52.813640][ T11] __x64_sys_unshare+0x31/0x40 [ 52.813781][ T11] do_syscall_64+0xc1/0x1d0 [ 52.813922][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 52.814099][ T11] [ 52.814171][ T11] Freed by task 11: [ 52.814275][ T11] kasan_save_stack+0x24/0x50 [ 52.814423][ T11] kasan_save_track+0x14/0x30 [ 52.814559][ T11] kasan_save_free_info+0x3b/0x60 [ 52.814703][ T11] __kasan_slab_free+0x38/0x50 [ 52.814852][ T11] kmem_cache_free+0xf8/0x330 [ 52.814991][ T11] cleanup_net+0x5a8/0xa40 [ 52.815128][ T11] process_one_work+0xe55/0x16d0 [ 52.815267][ T11] worker_thread+0x58c/0xce0 [ 52.815410][ T11] kthread+0x28a/0x350 [ 52.815518][ T11] ret_from_fork+0x31/0x70 [ 52.815659][ T11] ret_from_fork_asm+0x1a/0x30 [ 52.815800][ T11] [ 52.815872][ T11] Last potentially related work creation: [ 52.816017][ T11] kasan_save_stack+0x24/0x50 [ 52.816161][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 52.816301][ T11] insert_work+0x34/0x230 [ 52.816409][ T11] __queue_work+0x5fd/0xa40 [ 52.816548][ T11] queue_delayed_work_on+0x8c/0xa0 [ 52.816691][ T11] __inet_insert_ifa+0x751/0xb10 [ 52.816835][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 52.816980][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 52.817122][ T11] netlink_rcv_skb+0x130/0x360 [ 52.817261][ T11] netlink_unicast+0x44b/0x710 [ 52.817399][ T11] netlink_sendmsg+0x723/0xbe0 [ 52.817536][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 52.817671][ T11] ___sys_sendmsg+0xee/0x170 [ 52.817812][ T11] __sys_sendmsg+0x109/0x1a0 [ 52.817950][ T11] do_syscall_64+0xc1/0x1d0 [ 52.818088][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 52.818258][ T11] [ 52.818327][ T11] Second to last potentially related work creation: [ 52.818501][ T11] kasan_save_stack+0x24/0x50 [ 52.818644][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 52.818785][ T11] insert_work+0x34/0x230 [ 52.818892][ T11] __queue_work+0x5fd/0xa40 [ 52.819035][ T11] queue_delayed_work_on+0x8c/0xa0 [ 52.819176][ T11] __inet_insert_ifa+0x751/0xb10 [ 52.819316][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 52.819461][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 52.819603][ T11] netlink_rcv_skb+0x130/0x360 [ 52.819741][ T11] netlink_unicast+0x44b/0x710 [ 52.819885][ T11] netlink_sendmsg+0x723/0xbe0 [ 52.820025][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 52.820165][ T11] ___sys_sendmsg+0xee/0x170 [ 52.820304][ T11] __sys_sendmsg+0x109/0x1a0 [ 52.820437][ T11] do_syscall_64+0xc1/0x1d0 [ 52.820584][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 52.820756][ T11] [ 52.820831][ T11] The buggy address belongs to the object at ffff88800c298040 [ 52.820831][ T11] which belongs to the cache net_namespace of size 6080 [ 52.821192][ T11] The buggy address is located 184 bytes inside of [ 52.821192][ T11] freed 6080-byte region [ffff88800c298040, ffff88800c299800) [ 52.821532][ T11] [ 52.821606][ T11] The buggy address belongs to the physical page: [ 52.821780][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800c29cc00 pfn:0xc298 [ 52.822063][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 52.822275][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 52.822456][ T11] page_type: f5(slab) [ 52.822565][ T11] raw: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 52.822814][ T11] raw: ffff88800c29cc00 0000000000050003 00000001f5000000 0000000000000000 [ 52.823058][ T11] head: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 52.823308][ T11] head: ffff88800c29cc00 0000000000050003 00000001f5000000 0000000000000000 [ 52.823557][ T11] head: 0080000000000003 ffffea000030a601 ffffffffffffffff 0000000000000000 [ 52.823802][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 52.824051][ T11] page dumped because: kasan: bad access detected [ 52.824224][ T11] [ 52.824294][ T11] Memory state around the buggy address: [ 52.824436][ T11] ffff88800c297f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 52.824641][ T11] ffff88800c298000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 52.824843][ T11] >ffff88800c298080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.825047][ T11] ^ [ 52.825247][ T11] ffff88800c298100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.825447][ T11] ffff88800c298180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.825643][ T11] ================================================================== [ 52.825917][ T11] Disabling lock debugging due to kernel taint