[ 12.132612][ T11] ================================================================== [ 12.132842][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 12.133039][ T11] Read of size 8 at addr ffff8880051780f8 by task kworker/u16:0/11 [ 12.133227][ T11] [ 12.133294][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 12.133491][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 12.133648][ T11] Workqueue: netns cleanup_net [ 12.133784][ T11] Call Trace: [ 12.133881][ T11] [ 12.133953][ T11] dump_stack_lvl+0x82/0xd0 [ 12.134088][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 12.134245][ T11] ? cleanup_net+0xa5d/0xb90 [ 12.134370][ T11] print_report+0xb4/0x270 [ 12.134494][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 12.134617][ T11] kasan_report+0xbd/0xf0 [ 12.134713][ T11] ? cleanup_net+0xa5d/0xb90 [ 12.134838][ T11] cleanup_net+0xa5d/0xb90 [ 12.134963][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 12.135088][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 12.135216][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 12.135344][ T11] ? lock_acquire+0x32/0xc0 [ 12.135468][ T11] ? process_one_work+0xe0b/0x16d0 [ 12.135594][ T11] process_one_work+0xe55/0x16d0 [ 12.135720][ T11] ? __pfx___lock_release+0x10/0x10 [ 12.135852][ T11] ? __pfx_process_one_work+0x10/0x10 [ 12.135980][ T11] ? assign_work+0x16c/0x240 [ 12.136103][ T11] worker_thread+0x58c/0xce0 [ 12.136230][ T11] ? __pfx_worker_thread+0x10/0x10 [ 12.136354][ T11] kthread+0x28a/0x350 [ 12.136450][ T11] ? __pfx_kthread+0x10/0x10 [ 12.136576][ T11] ret_from_fork+0x31/0x70 [ 12.136700][ T11] ? __pfx_kthread+0x10/0x10 [ 12.136822][ T11] ret_from_fork_asm+0x1a/0x30 [ 12.136947][ T11] [ 12.137040][ T11] [ 12.137104][ T11] Allocated by task 257: [ 12.137199][ T11] kasan_save_stack+0x24/0x50 [ 12.137325][ T11] kasan_save_track+0x14/0x30 [ 12.137446][ T11] __kasan_slab_alloc+0x59/0x70 [ 12.137565][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 12.137692][ T11] copy_net_ns+0xc6/0x540 [ 12.137787][ T11] create_new_namespaces+0x35f/0x920 [ 12.137914][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 12.138040][ T11] ksys_unshare+0x2c4/0x6e0 [ 12.138166][ T11] __x64_sys_unshare+0x31/0x40 [ 12.138289][ T11] do_syscall_64+0xc1/0x1d0 [ 12.138416][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 12.138570][ T11] [ 12.138633][ T11] Freed by task 11: [ 12.138726][ T11] kasan_save_stack+0x24/0x50 [ 12.138853][ T11] kasan_save_track+0x14/0x30 [ 12.138974][ T11] kasan_save_free_info+0x3b/0x60 [ 12.139096][ T11] __kasan_slab_free+0x38/0x50 [ 12.139217][ T11] kmem_cache_free+0xf8/0x330 [ 12.139340][ T11] cleanup_net+0x5a8/0xb90 [ 12.139462][ T11] process_one_work+0xe55/0x16d0 [ 12.139581][ T11] worker_thread+0x58c/0xce0 [ 12.139703][ T11] kthread+0x28a/0x350 [ 12.139799][ T11] ret_from_fork+0x31/0x70 [ 12.139922][ T11] ret_from_fork_asm+0x1a/0x30 [ 12.140042][ T11] [ 12.140104][ T11] Last potentially related work creation: [ 12.140229][ T11] kasan_save_stack+0x24/0x50 [ 12.140355][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 12.140484][ T11] insert_work+0x34/0x230 [ 12.140580][ T11] __queue_work+0x5fd/0xa40 [ 12.140710][ T11] queue_delayed_work_on+0x8c/0xa0 [ 12.140836][ T11] __inet_insert_ifa+0x751/0xb10 [ 12.140970][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 12.141095][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 12.141220][ T11] netlink_rcv_skb+0x130/0x360 [ 12.141360][ T11] netlink_unicast+0x44b/0x710 [ 12.141488][ T11] netlink_sendmsg+0x723/0xbe0 [ 12.141620][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 12.141745][ T11] ___sys_sendmsg+0xee/0x170 [ 12.141879][ T11] __sys_sendmsg+0x109/0x1a0 [ 12.142016][ T11] do_syscall_64+0xc1/0x1d0 [ 12.142146][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 12.142309][ T11] [ 12.142380][ T11] Second to last potentially related work creation: [ 12.142541][ T11] kasan_save_stack+0x24/0x50 [ 12.142676][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 12.142800][ T11] insert_work+0x34/0x230 [ 12.142901][ T11] __queue_work+0x5fd/0xa40 [ 12.143026][ T11] queue_delayed_work_on+0x8c/0xa0 [ 12.143156][ T11] __inet_insert_ifa+0x751/0xb10 [ 12.143284][ T11] inetdev_event+0xb18/0xcf0 [ 12.143410][ T11] notifier_call_chain+0xcd/0x150 [ 12.143532][ T11] __dev_notify_flags+0xe6/0x250 [ 12.143664][ T11] dev_change_flags+0xec/0x160 [ 12.143790][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 12.143922][ T11] rtnl_newlink+0x6de/0xa80 [ 12.144051][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 12.144176][ T11] netlink_rcv_skb+0x130/0x360 [ 12.144303][ T11] netlink_unicast+0x44b/0x710 [ 12.144432][ T11] netlink_sendmsg+0x723/0xbe0 [ 12.144556][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 12.144686][ T11] ___sys_sendmsg+0xee/0x170 [ 12.144812][ T11] __sys_sendmsg+0x109/0x1a0 [ 12.144942][ T11] do_syscall_64+0xc1/0x1d0 [ 12.145071][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 12.145232][ T11] [ 12.145299][ T11] The buggy address belongs to the object at ffff888005178040 [ 12.145299][ T11] which belongs to the cache net_namespace of size 6528 [ 12.145641][ T11] The buggy address is located 184 bytes inside of [ 12.145641][ T11] freed 6528-byte region [ffff888005178040, ffff8880051799c0) [ 12.145955][ T11] [ 12.146020][ T11] The buggy address belongs to the physical page: [ 12.146176][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800517b640 pfn:0x5178 [ 12.146430][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 12.146624][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 12.146789][ T11] page_type: f5(slab) [ 12.146899][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 12.147126][ T11] raw: ffff88800517b640 0000000000040002 00000001f5000000 0000000000000000 [ 12.147355][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 12.147581][ T11] head: ffff88800517b640 0000000000040002 00000001f5000000 0000000000000000 [ 12.147796][ T11] head: 0080000000000003 ffffea0000145e01 ffffffffffffffff 0000000000000000 [ 12.148019][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 12.148243][ T11] page dumped because: kasan: bad access detected [ 12.148400][ T11] [ 12.148467][ T11] Memory state around the buggy address: [ 12.148593][ T11] ffff888005177f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.148773][ T11] ffff888005178000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 12.148954][ T11] >ffff888005178080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.149135][ T11] ^ [ 12.149318][ T11] ffff888005178100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.149500][ T11] ffff888005178180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.149679][ T11] ================================================================== [ 12.149887][ T11] Disabling lock debugging due to kernel taint