[ 23.158721][ T11] ================================================================== [ 23.158986][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 23.159194][ T11] Read of size 8 at addr ffff8880026500f8 by task kworker/u16:0/11 [ 23.159397][ T11] [ 23.159509][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 23.159729][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 23.159922][ T11] Workqueue: netns cleanup_net [ 23.160095][ T11] Call Trace: [ 23.160206][ T11] [ 23.160282][ T11] dump_stack_lvl+0x82/0xd0 [ 23.160432][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 23.160626][ T11] ? cleanup_net+0x932/0xa40 [ 23.160767][ T11] print_report+0xb4/0x270 [ 23.160905][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 23.161048][ T11] kasan_report+0xbd/0xf0 [ 23.161157][ T11] ? cleanup_net+0x932/0xa40 [ 23.161296][ T11] cleanup_net+0x932/0xa40 [ 23.161451][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 23.161610][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 23.161749][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 23.161895][ T11] ? lock_acquire+0x32/0xc0 [ 23.162048][ T11] ? process_one_work+0xe0b/0x16d0 [ 23.162192][ T11] process_one_work+0xe55/0x16d0 [ 23.162344][ T11] ? __pfx___lock_release+0x10/0x10 [ 23.162486][ T11] ? __pfx_process_one_work+0x10/0x10 [ 23.162637][ T11] ? assign_work+0x16c/0x240 [ 23.162780][ T11] worker_thread+0x58c/0xce0 [ 23.162924][ T11] ? __pfx_worker_thread+0x10/0x10 [ 23.163062][ T11] kthread+0x28a/0x350 [ 23.163173][ T11] ? __pfx_kthread+0x10/0x10 [ 23.163312][ T11] ret_from_fork+0x31/0x70 [ 23.163452][ T11] ? __pfx_kthread+0x10/0x10 [ 23.163599][ T11] ret_from_fork_asm+0x1a/0x30 [ 23.163750][ T11] [ 23.163862][ T11] [ 23.163940][ T11] Allocated by task 225: [ 23.164045][ T11] kasan_save_stack+0x24/0x50 [ 23.164190][ T11] kasan_save_track+0x14/0x30 [ 23.164326][ T11] __kasan_slab_alloc+0x59/0x70 [ 23.164509][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 23.164665][ T11] copy_net_ns+0xc6/0x340 [ 23.164771][ T11] create_new_namespaces+0x35f/0x920 [ 23.164914][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 23.165056][ T11] ksys_unshare+0x2a9/0x660 [ 23.165196][ T11] __x64_sys_unshare+0x31/0x40 [ 23.165332][ T11] do_syscall_64+0xc1/0x1d0 [ 23.165504][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.165695][ T11] [ 23.165767][ T11] Freed by task 11: [ 23.165871][ T11] kasan_save_stack+0x24/0x50 [ 23.166017][ T11] kasan_save_track+0x14/0x30 [ 23.166156][ T11] kasan_save_free_info+0x3b/0x60 [ 23.166296][ T11] __kasan_slab_free+0x38/0x50 [ 23.166436][ T11] kmem_cache_free+0xf8/0x330 [ 23.166592][ T11] cleanup_net+0x5a8/0xa40 [ 23.166729][ T11] process_one_work+0xe55/0x16d0 [ 23.166882][ T11] worker_thread+0x58c/0xce0 [ 23.167019][ T11] kthread+0x28a/0x350 [ 23.167123][ T11] ret_from_fork+0x31/0x70 [ 23.167262][ T11] ret_from_fork_asm+0x1a/0x30 [ 23.167402][ T11] [ 23.167477][ T11] Last potentially related work creation: [ 23.167623][ T11] kasan_save_stack+0x24/0x50 [ 23.167766][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 23.167906][ T11] insert_work+0x34/0x230 [ 23.168012][ T11] __queue_work+0x5fd/0xa40 [ 23.168155][ T11] queue_delayed_work_on+0x8c/0xa0 [ 23.168298][ T11] __inet_insert_ifa+0x751/0xb10 [ 23.168442][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 23.168592][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 23.168735][ T11] netlink_rcv_skb+0x130/0x360 [ 23.168872][ T11] netlink_unicast+0x44b/0x710 [ 23.169009][ T11] netlink_sendmsg+0x723/0xbe0 [ 23.169147][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 23.169290][ T11] ___sys_sendmsg+0xee/0x170 [ 23.169432][ T11] __sys_sendmsg+0x109/0x1a0 [ 23.169586][ T11] do_syscall_64+0xc1/0x1d0 [ 23.169728][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.169907][ T11] [ 23.170002][ T11] The buggy address belongs to the object at ffff888002650040 [ 23.170002][ T11] which belongs to the cache net_namespace of size 5696 [ 23.170391][ T11] The buggy address is located 184 bytes inside of [ 23.170391][ T11] freed 5696-byte region [ffff888002650040, ffff888002651680) [ 23.170756][ T11] [ 23.170831][ T11] The buggy address belongs to the physical page: [ 23.171008][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888002652fc0 pfn:0x2650 [ 23.171297][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 23.171522][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 23.171733][ T11] page_type: f5(slab) [ 23.171849][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 23.172117][ T11] raw: ffff888002652fc0 0000000000050002 00000001f5000000 0000000000000000 [ 23.172370][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 23.172633][ T11] head: ffff888002652fc0 0000000000050002 00000001f5000000 0000000000000000 [ 23.172886][ T11] head: 0080000000000003 ffffea0000099401 ffffffffffffffff 0000000000000000 [ 23.173137][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 23.173393][ T11] page dumped because: kasan: bad access detected [ 23.173584][ T11] [ 23.173658][ T11] Memory state around the buggy address: [ 23.173802][ T11] ffff88800264ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.174013][ T11] ffff888002650000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.174219][ T11] >ffff888002650080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.174452][ T11] ^ [ 23.174668][ T11] ffff888002650100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.174877][ T11] ffff888002650180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.175085][ T11] ================================================================== [ 23.175381][ T11] Disabling lock debugging due to kernel taint