[ 16.878768][ T11] ================================================================== [ 16.879034][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 16.879227][ T11] Read of size 8 at addr ffff8880093e80f8 by task kworker/u16:0/11 [ 16.879405][ T11] [ 16.879468][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 16.879713][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.879918][ T11] Workqueue: netns cleanup_net [ 16.880087][ T11] Call Trace: [ 16.880213][ T11] [ 16.880306][ T11] dump_stack_lvl+0x82/0xd0 [ 16.880475][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 16.880682][ T11] ? cleanup_net+0x932/0xa40 [ 16.880842][ T11] print_report+0xb4/0x270 [ 16.881004][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 16.881166][ T11] kasan_report+0xbd/0xf0 [ 16.881287][ T11] ? cleanup_net+0x932/0xa40 [ 16.881447][ T11] cleanup_net+0x932/0xa40 [ 16.881608][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 16.881777][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 16.881939][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 16.882103][ T11] ? lock_acquire+0x32/0xc0 [ 16.882263][ T11] ? process_one_work+0xe0b/0x16d0 [ 16.882427][ T11] process_one_work+0xe55/0x16d0 [ 16.882590][ T11] ? __pfx___lock_release+0x10/0x10 [ 16.882751][ T11] ? __pfx_process_one_work+0x10/0x10 [ 16.882910][ T11] ? assign_work+0x16c/0x240 [ 16.883072][ T11] worker_thread+0x58c/0xce0 [ 16.883235][ T11] ? __pfx_worker_thread+0x10/0x10 [ 16.883396][ T11] kthread+0x28a/0x350 [ 16.883519][ T11] ? __pfx_kthread+0x10/0x10 [ 16.883686][ T11] ret_from_fork+0x31/0x70 [ 16.883845][ T11] ? __pfx_kthread+0x10/0x10 [ 16.884005][ T11] ret_from_fork_asm+0x1a/0x30 [ 16.884172][ T11] [ 16.884292][ T11] [ 16.884375][ T11] Allocated by task 225: [ 16.884494][ T11] kasan_save_stack+0x24/0x50 [ 16.884659][ T11] kasan_save_track+0x14/0x30 [ 16.884814][ T11] __kasan_slab_alloc+0x59/0x70 [ 16.884973][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 16.885136][ T11] copy_net_ns+0xc6/0x340 [ 16.885259][ T11] create_new_namespaces+0x35f/0x920 [ 16.885418][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 16.885578][ T11] ksys_unshare+0x2a9/0x660 [ 16.885740][ T11] __x64_sys_unshare+0x31/0x40 [ 16.885902][ T11] do_syscall_64+0xc1/0x1d0 [ 16.886080][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.886278][ T11] [ 16.886361][ T11] Freed by task 11: [ 16.886485][ T11] kasan_save_stack+0x24/0x50 [ 16.886645][ T11] kasan_save_track+0x14/0x30 [ 16.886805][ T11] kasan_save_free_info+0x3b/0x60 [ 16.886964][ T11] __kasan_slab_free+0x38/0x50 [ 16.887122][ T11] kmem_cache_free+0xf8/0x330 [ 16.887283][ T11] cleanup_net+0x5a8/0xa40 [ 16.887443][ T11] process_one_work+0xe55/0x16d0 [ 16.887667][ T11] worker_thread+0x58c/0xce0 [ 16.887827][ T11] kthread+0x28a/0x350 [ 16.887949][ T11] ret_from_fork+0x31/0x70 [ 16.888109][ T11] ret_from_fork_asm+0x1a/0x30 [ 16.888331][ T11] [ 16.888413][ T11] Last potentially related work creation: [ 16.888575][ T11] kasan_save_stack+0x24/0x50 [ 16.888737][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 16.888967][ T11] insert_work+0x34/0x230 [ 16.889089][ T11] __queue_work+0x5fd/0xa40 [ 16.889250][ T11] queue_delayed_work_on+0x8c/0xa0 [ 16.889409][ T11] __inet_insert_ifa+0x751/0xb10 [ 16.889571][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 16.889802][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 16.889965][ T11] netlink_rcv_skb+0x130/0x360 [ 16.890124][ T11] netlink_unicast+0x44b/0x710 [ 16.890283][ T11] netlink_sendmsg+0x723/0xbe0 [ 16.890503][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 16.890666][ T11] ___sys_sendmsg+0xee/0x170 [ 16.890829][ T11] __sys_sendmsg+0x109/0x1a0 [ 16.890988][ T11] do_syscall_64+0xc1/0x1d0 [ 16.891225][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.891427][ T11] [ 16.891514][ T11] The buggy address belongs to the object at ffff8880093e8040 [ 16.891514][ T11] which belongs to the cache net_namespace of size 5696 [ 16.891993][ T11] The buggy address is located 184 bytes inside of [ 16.891993][ T11] freed 5696-byte region [ffff8880093e8040, ffff8880093e9680) [ 16.892381][ T11] [ 16.892522][ T11] The buggy address belongs to the physical page: [ 16.892716][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880093eafc0 pfn:0x93e8 [ 16.893037][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 16.893346][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 16.893553][ T11] page_type: f5(slab) [ 16.893677][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 16.894032][ T11] raw: ffff8880093eafc0 0000000000050002 00000001f5000000 0000000000000000 [ 16.894316][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 16.894668][ T11] head: ffff8880093eafc0 0000000000050002 00000001f5000000 0000000000000000 [ 16.894945][ T11] head: 0080000000000003 ffffea000024fa01 ffffffffffffffff 0000000000000000 [ 16.895223][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 16.895503][ T11] page dumped because: kasan: bad access detected [ 16.895697][ T11] [ 16.895777][ T11] Memory state around the buggy address: [ 16.896005][ T11] ffff8880093e7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.896243][ T11] ffff8880093e8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 16.896469][ T11] >ffff8880093e8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.896757][ T11] ^ [ 16.896981][ T11] ffff8880093e8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.897214][ T11] ffff8880093e8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.897442][ T11] ================================================================== [ 16.897704][ T11] Disabling lock debugging due to kernel taint