[ 36.982218][ T11] ================================================================== [ 36.982521][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 36.982730][ T11] Read of size 8 at addr ffff888004ee80f8 by task kworker/u16:0/11 [ 36.982913][ T11] [ 36.982979][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 36.983168][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 36.983327][ T11] Workqueue: netns cleanup_net [ 36.983464][ T11] Call Trace: [ 36.983563][ T11] [ 36.983632][ T11] dump_stack_lvl+0x82/0xd0 [ 36.983766][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 36.983926][ T11] ? cleanup_net+0xa5d/0xb90 [ 36.984055][ T11] print_report+0xb4/0x270 [ 36.984183][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 36.984309][ T11] kasan_report+0xbd/0xf0 [ 36.984406][ T11] ? cleanup_net+0xa5d/0xb90 [ 36.984539][ T11] cleanup_net+0xa5d/0xb90 [ 36.984664][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 36.984804][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 36.984932][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 36.985059][ T11] ? lock_acquire+0x32/0xc0 [ 36.985185][ T11] ? process_one_work+0xe0b/0x16d0 [ 36.985314][ T11] process_one_work+0xe55/0x16d0 [ 36.985446][ T11] ? __pfx___lock_release+0x10/0x10 [ 36.985572][ T11] ? __pfx_process_one_work+0x10/0x10 [ 36.985699][ T11] ? assign_work+0x16c/0x240 [ 36.985829][ T11] worker_thread+0x58c/0xce0 [ 36.985956][ T11] ? __pfx_worker_thread+0x10/0x10 [ 36.986082][ T11] kthread+0x28a/0x350 [ 36.986182][ T11] ? __pfx_kthread+0x10/0x10 [ 36.986317][ T11] ret_from_fork+0x31/0x70 [ 36.986445][ T11] ? __pfx_kthread+0x10/0x10 [ 36.986574][ T11] ret_from_fork_asm+0x1a/0x30 [ 36.986707][ T11] [ 36.986805][ T11] [ 36.986870][ T11] Allocated by task 252: [ 36.986966][ T11] kasan_save_stack+0x24/0x50 [ 36.987096][ T11] kasan_save_track+0x14/0x30 [ 36.987221][ T11] __kasan_slab_alloc+0x59/0x70 [ 36.987350][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 36.987478][ T11] copy_net_ns+0xc6/0x540 [ 36.987574][ T11] create_new_namespaces+0x35f/0x920 [ 36.987700][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 36.987827][ T11] ksys_unshare+0x2c4/0x6e0 [ 36.987954][ T11] __x64_sys_unshare+0x31/0x40 [ 36.988079][ T11] do_syscall_64+0xc1/0x1d0 [ 36.988207][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 36.988369][ T11] [ 36.988436][ T11] Freed by task 11: [ 36.988530][ T11] kasan_save_stack+0x24/0x50 [ 36.988655][ T11] kasan_save_track+0x14/0x30 [ 36.988779][ T11] kasan_save_free_info+0x3b/0x60 [ 36.988908][ T11] __kasan_slab_free+0x38/0x50 [ 36.989030][ T11] kmem_cache_free+0xf8/0x330 [ 36.989155][ T11] cleanup_net+0x5a8/0xb90 [ 36.989283][ T11] process_one_work+0xe55/0x16d0 [ 36.989408][ T11] worker_thread+0x58c/0xce0 [ 36.989533][ T11] kthread+0x28a/0x350 [ 36.989627][ T11] ret_from_fork+0x31/0x70 [ 36.989749][ T11] ret_from_fork_asm+0x1a/0x30 [ 36.989873][ T11] [ 36.989938][ T11] Last potentially related work creation: [ 36.990062][ T11] kasan_save_stack+0x24/0x50 [ 36.990195][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 36.990321][ T11] insert_work+0x34/0x230 [ 36.990419][ T11] __queue_work+0x5fd/0xa40 [ 36.990545][ T11] queue_delayed_work_on+0x8c/0xa0 [ 36.990671][ T11] __inet_insert_ifa+0x751/0xb10 [ 36.990799][ T11] inetdev_event+0xb18/0xcf0 [ 36.990924][ T11] notifier_call_chain+0xcd/0x150 [ 36.991051][ T11] __dev_notify_flags+0xe6/0x250 [ 36.991181][ T11] dev_change_flags+0xec/0x160 [ 36.991307][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 36.991435][ T11] rtnl_newlink+0x6de/0xa80 [ 36.991559][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 36.991684][ T11] netlink_rcv_skb+0x130/0x360 [ 36.991816][ T11] netlink_unicast+0x44b/0x710 [ 36.991944][ T11] netlink_sendmsg+0x723/0xbe0 [ 36.992070][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 36.992202][ T11] ___sys_sendmsg+0xee/0x170 [ 36.992417][ T11] __sys_sendmsg+0x109/0x1a0 [ 36.992548][ T11] do_syscall_64+0xc1/0x1d0 [ 36.992675][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 36.992831][ T11] [ 36.992898][ T11] The buggy address belongs to the object at ffff888004ee8040 [ 36.992898][ T11] which belongs to the cache net_namespace of size 6528 [ 36.993234][ T11] The buggy address is located 184 bytes inside of [ 36.993234][ T11] freed 6528-byte region [ffff888004ee8040, ffff888004ee99c0) [ 36.993536][ T11] [ 36.993601][ T11] The buggy address belongs to the physical page: [ 36.993753][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004eed140 pfn:0x4ee8 [ 36.994005][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 36.994199][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 36.994363][ T11] page_type: f5(slab) [ 36.994467][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 36.994689][ T11] raw: ffff888004eed140 0000000000040003 00000001f5000000 0000000000000000 [ 36.994920][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 36.995143][ T11] head: ffff888004eed140 0000000000040003 00000001f5000000 0000000000000000 [ 36.995364][ T11] head: 0080000000000003 ffffea000013ba01 ffffffffffffffff 0000000000000000 [ 36.995588][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 36.995807][ T11] page dumped because: kasan: bad access detected [ 36.995964][ T11] [ 36.996028][ T11] Memory state around the buggy address: [ 36.996150][ T11] ffff888004ee7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.996334][ T11] ffff888004ee8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.996516][ T11] >ffff888004ee8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.996703][ T11] ^ [ 36.996882][ T11] ffff888004ee8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.997065][ T11] ffff888004ee8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.997244][ T11] ================================================================== [ 36.997478][ T11] Disabling lock debugging due to kernel taint