[ 16.646289][ T11] ================================================================== [ 16.646692][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 16.646981][ T11] Read of size 8 at addr ffff88800b9b00f8 by task kworker/u16:0/11 [ 16.647248][ T11] [ 16.647354][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 16.647647][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.647886][ T11] Workqueue: netns cleanup_net [ 16.648096][ T11] Call Trace: [ 16.648263][ T11] [ 16.648369][ T11] dump_stack_lvl+0x82/0xd0 [ 16.648595][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 16.648835][ T11] ? cleanup_net+0x932/0xa40 [ 16.649037][ T11] print_report+0xb4/0x270 [ 16.649232][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 16.649429][ T11] kasan_report+0xbd/0xf0 [ 16.649582][ T11] ? cleanup_net+0x932/0xa40 [ 16.649775][ T11] cleanup_net+0x932/0xa40 [ 16.649962][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 16.650155][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 16.650351][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 16.650551][ T11] ? lock_acquire+0x32/0xc0 [ 16.650731][ T11] ? process_one_work+0xe0b/0x16d0 [ 16.650933][ T11] process_one_work+0xe55/0x16d0 [ 16.651138][ T11] ? __pfx___lock_release+0x10/0x10 [ 16.651332][ T11] ? __pfx_process_one_work+0x10/0x10 [ 16.651520][ T11] ? assign_work+0x16c/0x240 [ 16.651711][ T11] worker_thread+0x58c/0xce0 [ 16.651903][ T11] ? __pfx_worker_thread+0x10/0x10 [ 16.652081][ T11] kthread+0x28a/0x350 [ 16.652224][ T11] ? __pfx_kthread+0x10/0x10 [ 16.652402][ T11] ret_from_fork+0x31/0x70 [ 16.652592][ T11] ? __pfx_kthread+0x10/0x10 [ 16.652772][ T11] ret_from_fork_asm+0x1a/0x30 [ 16.652970][ T11] [ 16.653145][ T11] [ 16.653241][ T11] Allocated by task 223: [ 16.653391][ T11] kasan_save_stack+0x24/0x50 [ 16.653615][ T11] kasan_save_track+0x14/0x30 [ 16.653795][ T11] __kasan_slab_alloc+0x59/0x70 [ 16.653974][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 16.654173][ T11] copy_net_ns+0xc6/0x340 [ 16.654327][ T11] create_new_namespaces+0x35f/0x920 [ 16.654522][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 16.654709][ T11] ksys_unshare+0x2a9/0x660 [ 16.654907][ T11] __x64_sys_unshare+0x31/0x40 [ 16.655102][ T11] do_syscall_64+0xc1/0x1d0 [ 16.655285][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.655531][ T11] [ 16.655629][ T11] Freed by task 11: [ 16.655778][ T11] kasan_save_stack+0x24/0x50 [ 16.655993][ T11] kasan_save_track+0x14/0x30 [ 16.656183][ T11] kasan_save_free_info+0x3b/0x60 [ 16.656359][ T11] __kasan_slab_free+0x38/0x50 [ 16.656591][ T11] kmem_cache_free+0xf8/0x330 [ 16.656729][ T11] cleanup_net+0x5a8/0xa40 [ 16.656926][ T11] process_one_work+0xe55/0x16d0 [ 16.657127][ T11] worker_thread+0x58c/0xce0 [ 16.657303][ T11] kthread+0x28a/0x350 [ 16.657406][ T11] ret_from_fork+0x31/0x70 [ 16.657545][ T11] ret_from_fork_asm+0x1a/0x30 [ 16.657676][ T11] [ 16.657753][ T11] Last potentially related work creation: [ 16.657887][ T11] kasan_save_stack+0x24/0x50 [ 16.658021][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 16.658154][ T11] insert_work+0x34/0x230 [ 16.658251][ T11] __queue_work+0x5fd/0xa40 [ 16.658380][ T11] queue_delayed_work_on+0x8c/0xa0 [ 16.658508][ T11] __inet_insert_ifa+0x751/0xb10 [ 16.658638][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 16.658794][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 16.658932][ T11] netlink_rcv_skb+0x130/0x360 [ 16.659060][ T11] netlink_unicast+0x44b/0x710 [ 16.659187][ T11] netlink_sendmsg+0x723/0xbe0 [ 16.659310][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 16.659440][ T11] ___sys_sendmsg+0xee/0x170 [ 16.659567][ T11] __sys_sendmsg+0x109/0x1a0 [ 16.659692][ T11] do_syscall_64+0xc1/0x1d0 [ 16.659883][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.660132][ T11] [ 16.660240][ T11] The buggy address belongs to the object at ffff88800b9b0040 [ 16.660240][ T11] which belongs to the cache net_namespace of size 5696 [ 16.660769][ T11] The buggy address is located 184 bytes inside of [ 16.660769][ T11] freed 5696-byte region [ffff88800b9b0040, ffff88800b9b1680) [ 16.661221][ T11] [ 16.661293][ T11] The buggy address belongs to the physical page: [ 16.661454][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b9b2fc0 pfn:0xb9b0 [ 16.661781][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 16.661983][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 16.662148][ T11] page_type: f5(slab) [ 16.662248][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 16.662476][ T11] raw: ffff88800b9b2fc0 0000000000050002 00000001f5000000 0000000000000000 [ 16.662729][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 16.663051][ T11] head: ffff88800b9b2fc0 0000000000050002 00000001f5000000 0000000000000000 [ 16.663287][ T11] head: 0080000000000003 ffffea00002e6c01 ffffffffffffffff 0000000000000000 [ 16.663532][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 16.663760][ T11] page dumped because: kasan: bad access detected [ 16.663925][ T11] [ 16.663991][ T11] Memory state around the buggy address: [ 16.664118][ T11] ffff88800b9aff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.664305][ T11] ffff88800b9b0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 16.664486][ T11] >ffff88800b9b0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.664667][ T11] ^ [ 16.664874][ T11] ffff88800b9b0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.665076][ T11] ffff88800b9b0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.665277][ T11] ================================================================== [ 16.665586][ T11] Disabling lock debugging due to kernel taint