[ 10.710991][ T259] ip (259) used greatest stack depth: 23328 bytes left [ 16.393163][ T11] ================================================================== [ 16.393395][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 16.393588][ T11] Read of size 8 at addr ffff888004d49bf8 by task kworker/u16:0/11 [ 16.393769][ T11] [ 16.393836][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 16.394025][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.394197][ T11] Workqueue: netns cleanup_net [ 16.394343][ T11] Call Trace: [ 16.394438][ T11] [ 16.394504][ T11] dump_stack_lvl+0x82/0xd0 [ 16.394632][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 16.394790][ T11] ? cleanup_net+0xa5d/0xb90 [ 16.394918][ T11] print_report+0xb4/0x270 [ 16.395041][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 16.395166][ T11] kasan_report+0xbd/0xf0 [ 16.395263][ T11] ? cleanup_net+0xa5d/0xb90 [ 16.395389][ T11] cleanup_net+0xa5d/0xb90 [ 16.395511][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 16.395640][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 16.395762][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 16.395887][ T11] ? lock_acquire+0x32/0xc0 [ 16.396010][ T11] ? process_one_work+0xe0b/0x16d0 [ 16.396136][ T11] process_one_work+0xe55/0x16d0 [ 16.396263][ T11] ? __pfx___lock_release+0x10/0x10 [ 16.396390][ T11] ? __pfx_process_one_work+0x10/0x10 [ 16.396517][ T11] ? assign_work+0x16c/0x240 [ 16.396640][ T11] worker_thread+0x58c/0xce0 [ 16.396767][ T11] ? __pfx_worker_thread+0x10/0x10 [ 16.396893][ T11] kthread+0x28a/0x350 [ 16.396991][ T11] ? __pfx_kthread+0x10/0x10 [ 16.397129][ T11] ret_from_fork+0x31/0x70 [ 16.397256][ T11] ? __pfx_kthread+0x10/0x10 [ 16.397384][ T11] ret_from_fork_asm+0x1a/0x30 [ 16.397516][ T11] [ 16.397612][ T11] [ 16.397677][ T11] Allocated by task 257: [ 16.397772][ T11] kasan_save_stack+0x24/0x50 [ 16.397900][ T11] kasan_save_track+0x14/0x30 [ 16.398022][ T11] __kasan_slab_alloc+0x59/0x70 [ 16.398152][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 16.398281][ T11] copy_net_ns+0xc6/0x540 [ 16.398379][ T11] create_new_namespaces+0x35f/0x920 [ 16.398507][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 16.398634][ T11] ksys_unshare+0x2c4/0x6e0 [ 16.398758][ T11] __x64_sys_unshare+0x31/0x40 [ 16.398882][ T11] do_syscall_64+0xc1/0x1d0 [ 16.399005][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.399170][ T11] [ 16.399237][ T11] Freed by task 11: [ 16.399335][ T11] kasan_save_stack+0x24/0x50 [ 16.399464][ T11] kasan_save_track+0x14/0x30 [ 16.399587][ T11] kasan_save_free_info+0x3b/0x60 [ 16.399709][ T11] __kasan_slab_free+0x38/0x50 [ 16.399832][ T11] kmem_cache_free+0xf8/0x330 [ 16.399955][ T11] cleanup_net+0x5a8/0xb90 [ 16.400081][ T11] process_one_work+0xe55/0x16d0 [ 16.400205][ T11] worker_thread+0x58c/0xce0 [ 16.400328][ T11] kthread+0x28a/0x350 [ 16.400422][ T11] ret_from_fork+0x31/0x70 [ 16.400543][ T11] ret_from_fork_asm+0x1a/0x30 [ 16.400666][ T11] [ 16.400729][ T11] Last potentially related work creation: [ 16.400858][ T11] kasan_save_stack+0x24/0x50 [ 16.400984][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 16.401113][ T11] insert_work+0x34/0x230 [ 16.401207][ T11] __queue_work+0x5fd/0xa40 [ 16.401333][ T11] queue_delayed_work_on+0x8c/0xa0 [ 16.401462][ T11] __inet_insert_ifa+0x751/0xb10 [ 16.401588][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 16.401712][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 16.401836][ T11] netlink_rcv_skb+0x130/0x360 [ 16.401960][ T11] netlink_unicast+0x44b/0x710 [ 16.402090][ T11] netlink_sendmsg+0x723/0xbe0 [ 16.402230][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 16.402356][ T11] ___sys_sendmsg+0xee/0x170 [ 16.402483][ T11] __sys_sendmsg+0x109/0x1a0 [ 16.402607][ T11] do_syscall_64+0xc1/0x1d0 [ 16.402734][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.402893][ T11] [ 16.402958][ T11] Second to last potentially related work creation: [ 16.403116][ T11] kasan_save_stack+0x24/0x50 [ 16.403249][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 16.403380][ T11] insert_work+0x34/0x230 [ 16.403478][ T11] __queue_work+0x5fd/0xa40 [ 16.403602][ T11] queue_delayed_work_on+0x8c/0xa0 [ 16.403726][ T11] __inet_insert_ifa+0x751/0xb10 [ 16.403852][ T11] inetdev_event+0xb18/0xcf0 [ 16.403985][ T11] notifier_call_chain+0xcd/0x150 [ 16.404111][ T11] __dev_notify_flags+0xe6/0x250 [ 16.404238][ T11] dev_change_flags+0xec/0x160 [ 16.404366][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 16.404495][ T11] rtnl_newlink+0x6de/0xa80 [ 16.404619][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 16.404743][ T11] netlink_rcv_skb+0x130/0x360 [ 16.404868][ T11] netlink_unicast+0x44b/0x710 [ 16.404994][ T11] netlink_sendmsg+0x723/0xbe0 [ 16.405120][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 16.405248][ T11] ___sys_sendmsg+0xee/0x170 [ 16.405374][ T11] __sys_sendmsg+0x109/0x1a0 [ 16.405499][ T11] do_syscall_64+0xc1/0x1d0 [ 16.405625][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.405781][ T11] [ 16.405845][ T11] The buggy address belongs to the object at ffff888004d49b40 [ 16.405845][ T11] which belongs to the cache net_namespace of size 6528 [ 16.406170][ T11] The buggy address is located 184 bytes inside of [ 16.406170][ T11] freed 6528-byte region [ffff888004d49b40, ffff888004d4b4c0) [ 16.406468][ T11] [ 16.406533][ T11] The buggy address belongs to the physical page: [ 16.406690][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004d4b640 pfn:0x4d48 [ 16.406943][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 16.407140][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 16.407300][ T11] page_type: f5(slab) [ 16.407400][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 16.407623][ T11] raw: ffff888004d4b640 0000000000040002 00000001f5000000 0000000000000000 [ 16.407842][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 16.408063][ T11] head: ffff888004d4b640 0000000000040002 00000001f5000000 0000000000000000 [ 16.408285][ T11] head: 0080000000000003 ffffea0000135201 ffffffffffffffff 0000000000000000 [ 16.408504][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 16.408719][ T11] page dumped because: kasan: bad access detected [ 16.408871][ T11] [ 16.408934][ T11] Memory state around the buggy address: [ 16.409060][ T11] ffff888004d49a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.409246][ T11] ffff888004d49b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 16.409428][ T11] >ffff888004d49b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.409605][ T11] ^ [ 16.409782][ T11] ffff888004d49c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.409967][ T11] ffff888004d49c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.410144][ T11] ================================================================== [ 16.410349][ T11] Disabling lock debugging due to kernel taint