[ 48.667108][ T67] ================================================================== [ 48.667334][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 48.667531][ T67] Read of size 8 at addr ffff8880094d9bf8 by task kworker/u16:1/67 [ 48.667716][ T67] [ 48.667781][ T67] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 48.667972][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 48.668134][ T67] Workqueue: netns cleanup_net [ 48.668264][ T67] Call Trace: [ 48.668358][ T67] [ 48.668426][ T67] dump_stack_lvl+0x82/0xd0 [ 48.668555][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 48.668714][ T67] ? cleanup_net+0xa5d/0xb90 [ 48.668840][ T67] print_report+0xb4/0x270 [ 48.668966][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 48.669089][ T67] kasan_report+0xbd/0xf0 [ 48.669184][ T67] ? cleanup_net+0xa5d/0xb90 [ 48.669312][ T67] cleanup_net+0xa5d/0xb90 [ 48.669438][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 48.669566][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 48.669701][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 48.669826][ T67] ? lock_acquire+0x32/0xc0 [ 48.669950][ T67] ? process_one_work+0xe0b/0x16d0 [ 48.670076][ T67] process_one_work+0xe55/0x16d0 [ 48.670201][ T67] ? __pfx___lock_release+0x10/0x10 [ 48.670326][ T67] ? __pfx_process_one_work+0x10/0x10 [ 48.670456][ T67] ? assign_work+0x16c/0x240 [ 48.670579][ T67] worker_thread+0x58c/0xce0 [ 48.670701][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 48.670856][ T67] ? __pfx_worker_thread+0x10/0x10 [ 48.670989][ T67] ? __pfx_worker_thread+0x10/0x10 [ 48.671113][ T67] kthread+0x28a/0x350 [ 48.671211][ T67] ? __pfx_kthread+0x10/0x10 [ 48.671337][ T67] ret_from_fork+0x31/0x70 [ 48.671462][ T67] ? __pfx_kthread+0x10/0x10 [ 48.671590][ T67] ret_from_fork_asm+0x1a/0x30 [ 48.671720][ T67] [ 48.671815][ T67] [ 48.671881][ T67] Allocated by task 328: [ 48.671975][ T67] kasan_save_stack+0x24/0x50 [ 48.672098][ T67] kasan_save_track+0x14/0x30 [ 48.672221][ T67] __kasan_slab_alloc+0x59/0x70 [ 48.672344][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 48.672472][ T67] copy_net_ns+0xc6/0x540 [ 48.672566][ T67] create_new_namespaces+0x35f/0x920 [ 48.672694][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 48.672819][ T67] ksys_unshare+0x2c4/0x6e0 [ 48.672944][ T67] __x64_sys_unshare+0x31/0x40 [ 48.673064][ T67] do_syscall_64+0xc1/0x1d0 [ 48.673190][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 48.673348][ T67] [ 48.673415][ T67] Freed by task 67: [ 48.673512][ T67] kasan_save_stack+0x24/0x50 [ 48.673636][ T67] kasan_save_track+0x14/0x30 [ 48.673755][ T67] kasan_save_free_info+0x3b/0x60 [ 48.673883][ T67] __kasan_slab_free+0x38/0x50 [ 48.674003][ T67] kmem_cache_free+0xf8/0x330 [ 48.674126][ T67] cleanup_net+0x5a8/0xb90 [ 48.674249][ T67] process_one_work+0xe55/0x16d0 [ 48.674371][ T67] worker_thread+0x58c/0xce0 [ 48.674492][ T67] kthread+0x28a/0x350 [ 48.674592][ T67] ret_from_fork+0x31/0x70 [ 48.674715][ T67] ret_from_fork_asm+0x1a/0x30 [ 48.674840][ T67] [ 48.674909][ T67] Last potentially related work creation: [ 48.675033][ T67] kasan_save_stack+0x24/0x50 [ 48.675159][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 48.675282][ T67] insert_work+0x34/0x230 [ 48.675377][ T67] __queue_work+0x5fd/0xa40 [ 48.675500][ T67] queue_delayed_work_on+0x8c/0xa0 [ 48.675630][ T67] __inet_insert_ifa+0x751/0xb10 [ 48.675759][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 48.675882][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 48.676011][ T67] netlink_rcv_skb+0x130/0x360 [ 48.676139][ T67] netlink_unicast+0x44b/0x710 [ 48.676263][ T67] netlink_sendmsg+0x723/0xbe0 [ 48.676391][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 48.676520][ T67] ___sys_sendmsg+0xee/0x170 [ 48.676653][ T67] __sys_sendmsg+0x109/0x1a0 [ 48.676778][ T67] do_syscall_64+0xc1/0x1d0 [ 48.676904][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 48.677066][ T67] [ 48.677128][ T67] Second to last potentially related work creation: [ 48.677282][ T67] kasan_save_stack+0x24/0x50 [ 48.677406][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 48.677533][ T67] insert_work+0x34/0x230 [ 48.677630][ T67] __queue_work+0x5fd/0xa40 [ 48.677753][ T67] queue_delayed_work_on+0x8c/0xa0 [ 48.677878][ T67] __inet_insert_ifa+0x751/0xb10 [ 48.678007][ T67] inetdev_event+0xb18/0xcf0 [ 48.678132][ T67] notifier_call_chain+0xcd/0x150 [ 48.678256][ T67] __dev_notify_flags+0xe6/0x250 [ 48.678380][ T67] dev_change_flags+0xec/0x160 [ 48.678506][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 48.678630][ T67] rtnl_newlink+0x6de/0xa80 [ 48.678753][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 48.678876][ T67] netlink_rcv_skb+0x130/0x360 [ 48.678999][ T67] netlink_unicast+0x44b/0x710 [ 48.679121][ T67] netlink_sendmsg+0x723/0xbe0 [ 48.679243][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 48.679370][ T67] ___sys_sendmsg+0xee/0x170 [ 48.679493][ T67] __sys_sendmsg+0x109/0x1a0 [ 48.679614][ T67] do_syscall_64+0xc1/0x1d0 [ 48.679737][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 48.679894][ T67] [ 48.679960][ T67] The buggy address belongs to the object at ffff8880094d9b40 [ 48.679960][ T67] which belongs to the cache net_namespace of size 6528 [ 48.680282][ T67] The buggy address is located 184 bytes inside of [ 48.680282][ T67] freed 6528-byte region [ffff8880094d9b40, ffff8880094db4c0) [ 48.680576][ T67] [ 48.680640][ T67] The buggy address belongs to the physical page: [ 48.680789][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880094db640 pfn:0x94d8 [ 48.681040][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 48.681227][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 48.681385][ T67] page_type: f5(slab) [ 48.681486][ T67] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 48.681709][ T67] raw: ffff8880094db640 0000000000040002 00000001f5000000 0000000000000000 [ 48.681926][ T67] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 48.682141][ T67] head: ffff8880094db640 0000000000040002 00000001f5000000 0000000000000000 [ 48.682358][ T67] head: 0080000000000003 ffffea0000253601 ffffffffffffffff 0000000000000000 [ 48.682574][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 48.682788][ T67] page dumped because: kasan: bad access detected [ 48.682937][ T67] [ 48.683000][ T67] Memory state around the buggy address: [ 48.683127][ T67] ffff8880094d9a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 48.683305][ T67] ffff8880094d9b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 48.683480][ T67] >ffff8880094d9b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.683655][ T67] ^ [ 48.683830][ T67] ffff8880094d9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.684003][ T67] ffff8880094d9c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.684178][ T67] ================================================================== [ 48.684369][ T67] Disabling lock debugging due to kernel taint