[ 20.161480][ T66] ================================================================== [ 20.161828][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 20.162086][ T66] Read of size 8 at addr ffff88800b8a1bf8 by task kworker/u16:1/66 [ 20.162287][ T66] [ 20.162363][ T66] CPU: 2 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 20.162573][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 20.162748][ T66] Workqueue: netns cleanup_net [ 20.162897][ T66] Call Trace: [ 20.163001][ T66] [ 20.163077][ T66] dump_stack_lvl+0x82/0xd0 [ 20.163223][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 20.163398][ T66] ? cleanup_net+0xa5d/0xb90 [ 20.163536][ T66] print_report+0xb4/0x270 [ 20.163674][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 20.163811][ T66] kasan_report+0xbd/0xf0 [ 20.163922][ T66] ? cleanup_net+0xa5d/0xb90 [ 20.164063][ T66] cleanup_net+0xa5d/0xb90 [ 20.164200][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 20.164343][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 20.164479][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 20.164616][ T66] ? lock_acquire+0x32/0xc0 [ 20.164756][ T66] ? process_one_work+0xe0b/0x16d0 [ 20.164901][ T66] process_one_work+0xe55/0x16d0 [ 20.165041][ T66] ? __pfx___lock_release+0x10/0x10 [ 20.165182][ T66] ? __pfx_process_one_work+0x10/0x10 [ 20.165323][ T66] ? assign_work+0x16c/0x240 [ 20.165462][ T66] worker_thread+0x58c/0xce0 [ 20.165601][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 20.165773][ T66] ? __pfx_worker_thread+0x10/0x10 [ 20.165916][ T66] ? __pfx_worker_thread+0x10/0x10 [ 20.166059][ T66] kthread+0x28a/0x350 [ 20.166166][ T66] ? __pfx_kthread+0x10/0x10 [ 20.166306][ T66] ret_from_fork+0x31/0x70 [ 20.166444][ T66] ? __pfx_kthread+0x10/0x10 [ 20.166584][ T66] ret_from_fork_asm+0x1a/0x30 [ 20.166734][ T66] [ 20.166838][ T66] [ 20.166908][ T66] Allocated by task 257: [ 20.167011][ T66] kasan_save_stack+0x24/0x50 [ 20.167156][ T66] kasan_save_track+0x14/0x30 [ 20.167292][ T66] __kasan_slab_alloc+0x59/0x70 [ 20.167428][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 20.167566][ T66] copy_net_ns+0xc6/0x540 [ 20.167681][ T66] create_new_namespaces+0x35f/0x920 [ 20.167822][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 20.167959][ T66] ksys_unshare+0x2c4/0x6e0 [ 20.168100][ T66] __x64_sys_unshare+0x31/0x40 [ 20.168237][ T66] do_syscall_64+0xc1/0x1d0 [ 20.168378][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.168553][ T66] [ 20.168625][ T66] Freed by task 66: [ 20.168728][ T66] kasan_save_stack+0x24/0x50 [ 20.168863][ T66] kasan_save_track+0x14/0x30 [ 20.168997][ T66] kasan_save_free_info+0x3b/0x60 [ 20.169143][ T66] __kasan_slab_free+0x38/0x50 [ 20.169280][ T66] kmem_cache_free+0xf8/0x330 [ 20.169419][ T66] cleanup_net+0x5a8/0xb90 [ 20.169551][ T66] process_one_work+0xe55/0x16d0 [ 20.169689][ T66] worker_thread+0x58c/0xce0 [ 20.169825][ T66] kthread+0x28a/0x350 [ 20.169936][ T66] ret_from_fork+0x31/0x70 [ 20.170070][ T66] ret_from_fork_asm+0x1a/0x30 [ 20.170206][ T66] [ 20.170276][ T66] Last potentially related work creation: [ 20.170419][ T66] kasan_save_stack+0x24/0x50 [ 20.170563][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 20.170707][ T66] insert_work+0x34/0x230 [ 20.170813][ T66] __queue_work+0x5fd/0xa40 [ 20.170952][ T66] queue_delayed_work_on+0x8c/0xa0 [ 20.171090][ T66] __inet_insert_ifa+0x751/0xb10 [ 20.171230][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 20.171367][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 20.171509][ T66] netlink_rcv_skb+0x130/0x360 [ 20.171648][ T66] netlink_unicast+0x44b/0x710 [ 20.171787][ T66] netlink_sendmsg+0x723/0xbe0 [ 20.171922][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 20.172061][ T66] ___sys_sendmsg+0xee/0x170 [ 20.172200][ T66] __sys_sendmsg+0x109/0x1a0 [ 20.172338][ T66] do_syscall_64+0xc1/0x1d0 [ 20.172470][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.172646][ T66] [ 20.172717][ T66] Second to last potentially related work creation: [ 20.172887][ T66] kasan_save_stack+0x24/0x50 [ 20.173028][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 20.173167][ T66] insert_work+0x34/0x230 [ 20.173272][ T66] __queue_work+0x5fd/0xa40 [ 20.173406][ T66] queue_delayed_work_on+0x8c/0xa0 [ 20.173542][ T66] __inet_insert_ifa+0x751/0xb10 [ 20.173681][ T66] inetdev_event+0xb18/0xcf0 [ 20.173816][ T66] notifier_call_chain+0xcd/0x150 [ 20.173952][ T66] __dev_notify_flags+0xe6/0x250 [ 20.174087][ T66] dev_change_flags+0xec/0x160 [ 20.174223][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 20.174365][ T66] rtnl_newlink+0x6de/0xa80 [ 20.174505][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 20.174646][ T66] netlink_rcv_skb+0x130/0x360 [ 20.174784][ T66] netlink_unicast+0x44b/0x710 [ 20.174923][ T66] netlink_sendmsg+0x723/0xbe0 [ 20.175062][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 20.175199][ T66] ___sys_sendmsg+0xee/0x170 [ 20.175337][ T66] __sys_sendmsg+0x109/0x1a0 [ 20.175478][ T66] do_syscall_64+0xc1/0x1d0 [ 20.175619][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.175790][ T66] [ 20.175860][ T66] The buggy address belongs to the object at ffff88800b8a1b40 [ 20.175860][ T66] which belongs to the cache net_namespace of size 6528 [ 20.176230][ T66] The buggy address is located 184 bytes inside of [ 20.176230][ T66] freed 6528-byte region [ffff88800b8a1b40, ffff88800b8a34c0) [ 20.176563][ T66] [ 20.176634][ T66] The buggy address belongs to the physical page: [ 20.176801][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b8a5140 pfn:0xb8a0 [ 20.177079][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 20.177286][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 20.177467][ T66] page_type: f5(slab) [ 20.177580][ T66] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 20.177834][ T66] raw: ffff88800b8a5140 0000000000040003 00000001f5000000 0000000000000000 [ 20.178082][ T66] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 20.178327][ T66] head: ffff88800b8a5140 0000000000040003 00000001f5000000 0000000000000000 [ 20.178572][ T66] head: 0080000000000003 ffffea00002e2801 ffffffffffffffff 0000000000000000 [ 20.178811][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 20.179054][ T66] page dumped because: kasan: bad access detected [ 20.179226][ T66] [ 20.179297][ T66] Memory state around the buggy address: [ 20.179431][ T66] ffff88800b8a1a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.179634][ T66] ffff88800b8a1b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 20.179839][ T66] >ffff88800b8a1b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.180038][ T66] ^ [ 20.180240][ T66] ffff88800b8a1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.180440][ T66] ffff88800b8a1c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.180641][ T66] ================================================================== [ 20.180904][ T66] Disabling lock debugging due to kernel taint