[ 11.567931][ T65] ================================================================== [ 11.568151][ T65] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 11.568338][ T65] Read of size 8 at addr ffff8880089e00f8 by task kworker/u16:1/65 [ 11.568519][ T65] [ 11.568584][ T65] CPU: 3 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 11.568774][ T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.568931][ T65] Workqueue: netns cleanup_net [ 11.569060][ T65] Call Trace: [ 11.569155][ T65] [ 11.569220][ T65] dump_stack_lvl+0x82/0xd0 [ 11.569354][ T65] print_address_description.constprop.0+0x2c/0x3b0 [ 11.569510][ T65] ? cleanup_net+0xa5d/0xb90 [ 11.569636][ T65] print_report+0xb4/0x270 [ 11.569761][ T65] ? kasan_addr_to_slab+0x25/0x80 [ 11.569887][ T65] kasan_report+0xbd/0xf0 [ 11.569982][ T65] ? cleanup_net+0xa5d/0xb90 [ 11.570107][ T65] cleanup_net+0xa5d/0xb90 [ 11.570228][ T65] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.570358][ T65] ? __pfx_cleanup_net+0x10/0x10 [ 11.570480][ T65] ? trace_lock_acquire+0x148/0x1f0 [ 11.570604][ T65] ? lock_acquire+0x32/0xc0 [ 11.570726][ T65] ? process_one_work+0xe0b/0x16d0 [ 11.570853][ T65] process_one_work+0xe55/0x16d0 [ 11.570978][ T65] ? __pfx___lock_release+0x10/0x10 [ 11.571103][ T65] ? __pfx_process_one_work+0x10/0x10 [ 11.571228][ T65] ? assign_work+0x16c/0x240 [ 11.571351][ T65] worker_thread+0x58c/0xce0 [ 11.571473][ T65] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 11.571626][ T65] ? __pfx_worker_thread+0x10/0x10 [ 11.571749][ T65] ? __pfx_worker_thread+0x10/0x10 [ 11.571872][ T65] kthread+0x28a/0x350 [ 11.571967][ T65] ? __pfx_kthread+0x10/0x10 [ 11.572092][ T65] ret_from_fork+0x31/0x70 [ 11.572214][ T65] ? __pfx_kthread+0x10/0x10 [ 11.572347][ T65] ret_from_fork_asm+0x1a/0x30 [ 11.572475][ T65] [ 11.572568][ T65] [ 11.572634][ T65] Allocated by task 256: [ 11.572728][ T65] kasan_save_stack+0x24/0x50 [ 11.572857][ T65] kasan_save_track+0x14/0x30 [ 11.572979][ T65] __kasan_slab_alloc+0x59/0x70 [ 11.573104][ T65] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.573229][ T65] copy_net_ns+0xc6/0x540 [ 11.573324][ T65] create_new_namespaces+0x35f/0x920 [ 11.573452][ T65] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 11.573576][ T65] ksys_unshare+0x2c4/0x6e0 [ 11.573701][ T65] __x64_sys_unshare+0x31/0x40 [ 11.573826][ T65] do_syscall_64+0xc1/0x1d0 [ 11.573951][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.574107][ T65] [ 11.574174][ T65] Freed by task 65: [ 11.574268][ T65] kasan_save_stack+0x24/0x50 [ 11.574393][ T65] kasan_save_track+0x14/0x30 [ 11.574514][ T65] kasan_save_free_info+0x3b/0x60 [ 11.574637][ T65] __kasan_slab_free+0x38/0x50 [ 11.574761][ T65] kmem_cache_free+0xf8/0x330 [ 11.574885][ T65] cleanup_net+0x5a8/0xb90 [ 11.575008][ T65] process_one_work+0xe55/0x16d0 [ 11.575131][ T65] worker_thread+0x58c/0xce0 [ 11.575248][ T65] kthread+0x28a/0x350 [ 11.575341][ T65] ret_from_fork+0x31/0x70 [ 11.575464][ T65] ret_from_fork_asm+0x1a/0x30 [ 11.575589][ T65] [ 11.575651][ T65] Last potentially related work creation: [ 11.575783][ T65] kasan_save_stack+0x24/0x50 [ 11.575911][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 11.576035][ T65] insert_work+0x34/0x230 [ 11.576128][ T65] __queue_work+0x5fd/0xa40 [ 11.576253][ T65] queue_delayed_work_on+0x8c/0xa0 [ 11.576377][ T65] __inet_insert_ifa+0x751/0xb10 [ 11.576504][ T65] inet_rtm_newaddr+0x833/0xbd0 [ 11.576629][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 11.576755][ T65] netlink_rcv_skb+0x130/0x360 [ 11.576881][ T65] netlink_unicast+0x44b/0x710 [ 11.577007][ T65] netlink_sendmsg+0x723/0xbe0 [ 11.577127][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 11.577254][ T65] ___sys_sendmsg+0xee/0x170 [ 11.577380][ T65] __sys_sendmsg+0x109/0x1a0 [ 11.577500][ T65] do_syscall_64+0xc1/0x1d0 [ 11.577622][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.577778][ T65] [ 11.577844][ T65] Second to last potentially related work creation: [ 11.577992][ T65] kasan_save_stack+0x24/0x50 [ 11.578124][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 11.578259][ T65] insert_work+0x34/0x230 [ 11.578354][ T65] __queue_work+0x5fd/0xa40 [ 11.578476][ T65] queue_delayed_work_on+0x8c/0xa0 [ 11.578603][ T65] __inet_insert_ifa+0x751/0xb10 [ 11.578729][ T65] inetdev_event+0xb18/0xcf0 [ 11.578853][ T65] notifier_call_chain+0xcd/0x150 [ 11.578975][ T65] __dev_notify_flags+0xe6/0x250 [ 11.579096][ T65] dev_change_flags+0xec/0x160 [ 11.579221][ T65] do_setlink.constprop.0+0x79d/0x2300 [ 11.579346][ T65] rtnl_newlink+0x6de/0xa80 [ 11.579469][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 11.579594][ T65] netlink_rcv_skb+0x130/0x360 [ 11.579718][ T65] netlink_unicast+0x44b/0x710 [ 11.579843][ T65] netlink_sendmsg+0x723/0xbe0 [ 11.579964][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 11.580087][ T65] ___sys_sendmsg+0xee/0x170 [ 11.580212][ T65] __sys_sendmsg+0x109/0x1a0 [ 11.580338][ T65] do_syscall_64+0xc1/0x1d0 [ 11.580462][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.580616][ T65] [ 11.580680][ T65] The buggy address belongs to the object at ffff8880089e0040 [ 11.580680][ T65] which belongs to the cache net_namespace of size 6528 [ 11.581005][ T65] The buggy address is located 184 bytes inside of [ 11.581005][ T65] freed 6528-byte region [ffff8880089e0040, ffff8880089e19c0) [ 11.581298][ T65] [ 11.581363][ T65] The buggy address belongs to the physical page: [ 11.581513][ T65] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880089e3640 pfn:0x89e0 [ 11.581768][ T65] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.581953][ T65] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.582110][ T65] page_type: f5(slab) [ 11.582208][ T65] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.582426][ T65] raw: ffff8880089e3640 0000000000040002 00000001f5000000 0000000000000000 [ 11.582643][ T65] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.582861][ T65] head: ffff8880089e3640 0000000000040002 00000001f5000000 0000000000000000 [ 11.583078][ T65] head: 0080000000000003 ffffea0000227801 ffffffffffffffff 0000000000000000 [ 11.583295][ T65] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.583514][ T65] page dumped because: kasan: bad access detected [ 11.583664][ T65] [ 11.583726][ T65] Memory state around the buggy address: [ 11.583845][ T65] ffff8880089dff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.584021][ T65] ffff8880089e0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.584196][ T65] >ffff8880089e0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.584377][ T65] ^ [ 11.584560][ T65] ffff8880089e0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.584736][ T65] ffff8880089e0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.584912][ T65] ================================================================== [ 11.585112][ T65] Disabling lock debugging due to kernel taint