[ 15.850588][ T67] ================================================================== [ 15.850860][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 15.851101][ T67] Read of size 8 at addr ffff88800a971bf8 by task kworker/u16:1/67 [ 15.851333][ T67] [ 15.851414][ T67] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 15.851655][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.851856][ T67] Workqueue: netns cleanup_net [ 15.852021][ T67] Call Trace: [ 15.852142][ T67] [ 15.852225][ T67] dump_stack_lvl+0x82/0xd0 [ 15.852391][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 15.852594][ T67] ? cleanup_net+0xa5d/0xb90 [ 15.852757][ T67] print_report+0xb4/0x270 [ 15.852915][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 15.853075][ T67] kasan_report+0xbd/0xf0 [ 15.853197][ T67] ? cleanup_net+0xa5d/0xb90 [ 15.853356][ T67] cleanup_net+0xa5d/0xb90 [ 15.853513][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 15.853679][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 15.853835][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 15.853995][ T67] ? lock_acquire+0x32/0xc0 [ 15.854151][ T67] ? process_one_work+0xe0b/0x16d0 [ 15.854311][ T67] process_one_work+0xe55/0x16d0 [ 15.854471][ T67] ? __pfx___lock_release+0x10/0x10 [ 15.854632][ T67] ? __pfx_process_one_work+0x10/0x10 [ 15.854794][ T67] ? assign_work+0x16c/0x240 [ 15.854954][ T67] worker_thread+0x58c/0xce0 [ 15.855120][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 15.855319][ T67] ? __pfx_worker_thread+0x10/0x10 [ 15.855477][ T67] ? __pfx_worker_thread+0x10/0x10 [ 15.855643][ T67] kthread+0x28a/0x350 [ 15.855768][ T67] ? __pfx_kthread+0x10/0x10 [ 15.855924][ T67] ret_from_fork+0x31/0x70 [ 15.856082][ T67] ? __pfx_kthread+0x10/0x10 [ 15.856240][ T67] ret_from_fork_asm+0x1a/0x30 [ 15.856408][ T67] [ 15.856527][ T67] [ 15.856608][ T67] Allocated by task 255: [ 15.856731][ T67] kasan_save_stack+0x24/0x50 [ 15.856895][ T67] kasan_save_track+0x14/0x30 [ 15.857052][ T67] __kasan_slab_alloc+0x59/0x70 [ 15.857209][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 15.857369][ T67] copy_net_ns+0xc6/0x540 [ 15.857490][ T67] create_new_namespaces+0x35f/0x920 [ 15.857654][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 15.857812][ T67] ksys_unshare+0x2c4/0x6e0 [ 15.857974][ T67] __x64_sys_unshare+0x31/0x40 [ 15.858134][ T67] do_syscall_64+0xc1/0x1d0 [ 15.858299][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.858497][ T67] [ 15.858577][ T67] Freed by task 67: [ 15.858696][ T67] kasan_save_stack+0x24/0x50 [ 15.858870][ T67] kasan_save_track+0x14/0x30 [ 15.859027][ T67] kasan_save_free_info+0x3b/0x60 [ 15.859184][ T67] __kasan_slab_free+0x38/0x50 [ 15.859350][ T67] kmem_cache_free+0xf8/0x330 [ 15.859507][ T67] cleanup_net+0x5a8/0xb90 [ 15.859665][ T67] process_one_work+0xe55/0x16d0 [ 15.859824][ T67] worker_thread+0x58c/0xce0 [ 15.859980][ T67] kthread+0x28a/0x350 [ 15.860099][ T67] ret_from_fork+0x31/0x70 [ 15.860254][ T67] ret_from_fork_asm+0x1a/0x30 [ 15.860410][ T67] [ 15.860491][ T67] Last potentially related work creation: [ 15.860649][ T67] kasan_save_stack+0x24/0x50 [ 15.860808][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 15.860967][ T67] insert_work+0x34/0x230 [ 15.861089][ T67] __queue_work+0x5fd/0xa40 [ 15.861248][ T67] queue_delayed_work_on+0x8c/0xa0 [ 15.861405][ T67] __inet_insert_ifa+0x751/0xb10 [ 15.861564][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 15.861723][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 15.861883][ T67] netlink_rcv_skb+0x130/0x360 [ 15.862043][ T67] netlink_unicast+0x44b/0x710 [ 15.862200][ T67] netlink_sendmsg+0x723/0xbe0 [ 15.862357][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 15.862516][ T67] ___sys_sendmsg+0xee/0x170 [ 15.862679][ T67] __sys_sendmsg+0x109/0x1a0 [ 15.862844][ T67] do_syscall_64+0xc1/0x1d0 [ 15.863004][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.863206][ T67] [ 15.863286][ T67] Second to last potentially related work creation: [ 15.863477][ T67] kasan_save_stack+0x24/0x50 [ 15.863635][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 15.863792][ T67] insert_work+0x34/0x230 [ 15.863913][ T67] __queue_work+0x5fd/0xa40 [ 15.864071][ T67] queue_delayed_work_on+0x8c/0xa0 [ 15.864229][ T67] __inet_insert_ifa+0x751/0xb10 [ 15.864386][ T67] inetdev_event+0xb18/0xcf0 [ 15.864557][ T67] notifier_call_chain+0xcd/0x150 [ 15.864718][ T67] __dev_notify_flags+0xe6/0x250 [ 15.864877][ T67] dev_change_flags+0xec/0x160 [ 15.865035][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 15.865195][ T67] rtnl_newlink+0x6de/0xa80 [ 15.865351][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 15.865510][ T67] netlink_rcv_skb+0x130/0x360 [ 15.865668][ T67] netlink_unicast+0x44b/0x710 [ 15.865825][ T67] netlink_sendmsg+0x723/0xbe0 [ 15.865982][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 15.866137][ T67] ___sys_sendmsg+0xee/0x170 [ 15.866295][ T67] __sys_sendmsg+0x109/0x1a0 [ 15.866453][ T67] do_syscall_64+0xc1/0x1d0 [ 15.866613][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.866812][ T67] [ 15.866893][ T67] The buggy address belongs to the object at ffff88800a971b40 [ 15.866893][ T67] which belongs to the cache net_namespace of size 6528 [ 15.867321][ T67] The buggy address is located 184 bytes inside of [ 15.867321][ T67] freed 6528-byte region [ffff88800a971b40, ffff88800a9734c0) [ 15.867699][ T67] [ 15.867784][ T67] The buggy address belongs to the physical page: [ 15.867977][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a973640 pfn:0xa970 [ 15.868296][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 15.868533][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 15.868733][ T67] page_type: f5(slab) [ 15.868863][ T67] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 15.869140][ T67] raw: ffff88800a973640 0000000000040002 00000001f5000000 0000000000000000 [ 15.869414][ T67] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 15.869693][ T67] head: ffff88800a973640 0000000000040002 00000001f5000000 0000000000000000 [ 15.869970][ T67] head: 0080000000000003 ffffea00002a5c01 ffffffffffffffff 0000000000000000 [ 15.870245][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 15.870518][ T67] page dumped because: kasan: bad access detected [ 15.870710][ T67] [ 15.870788][ T67] Memory state around the buggy address: [ 15.870942][ T67] ffff88800a971a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.871266][ T67] ffff88800a971b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 15.871448][ T67] >ffff88800a971b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.871628][ T67] ^ [ 15.871806][ T67] ffff88800a971c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.871982][ T67] ffff88800a971c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.872155][ T67] ================================================================== [ 15.872352][ T67] Disabling lock debugging due to kernel taint