[ 18.209090][ T11] ================================================================== [ 18.209456][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 18.209775][ T11] Read of size 8 at addr ffff8880025900f8 by task kworker/u16:0/11 [ 18.210054][ T11] [ 18.210151][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 18.210470][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 18.210728][ T11] Workqueue: netns cleanup_net [ 18.210929][ T11] Call Trace: [ 18.211074][ T11] [ 18.211188][ T11] dump_stack_lvl+0x82/0xd0 [ 18.211387][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 18.211672][ T11] ? cleanup_net+0x932/0xa40 [ 18.211867][ T11] print_report+0xb4/0x270 [ 18.212061][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 18.212253][ T11] kasan_report+0xbd/0xf0 [ 18.212397][ T11] ? cleanup_net+0x932/0xa40 [ 18.212607][ T11] cleanup_net+0x932/0xa40 [ 18.212812][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 18.213021][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 18.213227][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 18.213433][ T11] ? lock_acquire+0x32/0xc0 [ 18.213639][ T11] ? process_one_work+0xe0b/0x16d0 [ 18.213848][ T11] process_one_work+0xe55/0x16d0 [ 18.214063][ T11] ? __pfx___lock_release+0x10/0x10 [ 18.214273][ T11] ? __pfx_process_one_work+0x10/0x10 [ 18.214481][ T11] ? assign_work+0x16c/0x240 [ 18.214690][ T11] worker_thread+0x58c/0xce0 [ 18.214896][ T11] ? __pfx_worker_thread+0x10/0x10 [ 18.215036][ T11] kthread+0x28a/0x350 [ 18.215141][ T11] ? __pfx_kthread+0x10/0x10 [ 18.215279][ T11] ret_from_fork+0x31/0x70 [ 18.215431][ T11] ? __pfx_kthread+0x10/0x10 [ 18.215597][ T11] ret_from_fork_asm+0x1a/0x30 [ 18.215769][ T11] [ 18.215879][ T11] [ 18.215951][ T11] Allocated by task 224: [ 18.216060][ T11] kasan_save_stack+0x24/0x50 [ 18.216206][ T11] kasan_save_track+0x14/0x30 [ 18.216362][ T11] __kasan_slab_alloc+0x59/0x70 [ 18.216539][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 18.216714][ T11] copy_net_ns+0xc6/0x340 [ 18.216820][ T11] create_new_namespaces+0x35f/0x920 [ 18.216981][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 18.217151][ T11] ksys_unshare+0x2a9/0x660 [ 18.217335][ T11] __x64_sys_unshare+0x31/0x40 [ 18.217528][ T11] do_syscall_64+0xc1/0x1d0 [ 18.217712][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.217891][ T11] [ 18.217977][ T11] Freed by task 11: [ 18.218109][ T11] kasan_save_stack+0x24/0x50 [ 18.218255][ T11] kasan_save_track+0x14/0x30 [ 18.218437][ T11] kasan_save_free_info+0x3b/0x60 [ 18.218579][ T11] __kasan_slab_free+0x38/0x50 [ 18.218741][ T11] kmem_cache_free+0xf8/0x330 [ 18.218923][ T11] cleanup_net+0x5a8/0xa40 [ 18.219087][ T11] process_one_work+0xe55/0x16d0 [ 18.219234][ T11] worker_thread+0x58c/0xce0 [ 18.219428][ T11] kthread+0x28a/0x350 [ 18.219535][ T11] ret_from_fork+0x31/0x70 [ 18.219671][ T11] ret_from_fork_asm+0x1a/0x30 [ 18.219812][ T11] [ 18.219886][ T11] Last potentially related work creation: [ 18.220028][ T11] kasan_save_stack+0x24/0x50 [ 18.220171][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 18.220311][ T11] insert_work+0x34/0x230 [ 18.220426][ T11] __queue_work+0x5fd/0xa40 [ 18.220568][ T11] queue_delayed_work_on+0x8c/0xa0 [ 18.220717][ T11] __inet_insert_ifa+0x751/0xb10 [ 18.220856][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 18.220996][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 18.221137][ T11] netlink_rcv_skb+0x130/0x360 [ 18.221281][ T11] netlink_unicast+0x44b/0x710 [ 18.221430][ T11] netlink_sendmsg+0x723/0xbe0 [ 18.221580][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 18.221723][ T11] ___sys_sendmsg+0xee/0x170 [ 18.221873][ T11] __sys_sendmsg+0x109/0x1a0 [ 18.222011][ T11] do_syscall_64+0xc1/0x1d0 [ 18.222152][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.222328][ T11] [ 18.222417][ T11] The buggy address belongs to the object at ffff888002590040 [ 18.222417][ T11] which belongs to the cache net_namespace of size 5696 [ 18.222867][ T11] The buggy address is located 184 bytes inside of [ 18.222867][ T11] freed 5696-byte region [ffff888002590040, ffff888002591680) [ 18.223193][ T11] [ 18.223262][ T11] The buggy address belongs to the physical page: [ 18.223436][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888002592fc0 pfn:0x2590 [ 18.223722][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 18.223926][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 18.224104][ T11] page_type: f5(slab) [ 18.224211][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 18.224469][ T11] raw: ffff888002592fc0 0000000000050002 00000001f5000000 0000000000000000 [ 18.224710][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 18.224954][ T11] head: ffff888002592fc0 0000000000050002 00000001f5000000 0000000000000000 [ 18.225196][ T11] head: 0080000000000003 ffffea0000096401 ffffffffffffffff 0000000000000000 [ 18.225455][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 18.225696][ T11] page dumped because: kasan: bad access detected [ 18.225866][ T11] [ 18.225935][ T11] Memory state around the buggy address: [ 18.226069][ T11] ffff88800258ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.226275][ T11] ffff888002590000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 18.226515][ T11] >ffff888002590080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.226743][ T11] ^ [ 18.226976][ T11] ffff888002590100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.227211][ T11] ffff888002590180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.227420][ T11] ================================================================== [ 18.227698][ T11] Disabling lock debugging due to kernel taint