[ 11.505970][ T271] ip (271) used greatest stack depth: 23280 bytes left [ 22.003458][ T383] netem: version 1.3 [ 67.406670][ T1229] mptcp_connect (1229) used greatest stack depth: 23136 bytes left [ 293.942622][ T11] ================================================================== [ 293.942904][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 293.943093][ T11] Read of size 8 at addr ffff888004e2e5f8 by task kworker/u16:0/11 [ 293.943269][ T11] [ 293.943337][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 293.943526][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 293.943678][ T11] Workqueue: netns cleanup_net [ 293.943803][ T11] Call Trace: [ 293.943897][ T11] [ 293.943965][ T11] dump_stack_lvl+0x82/0xd0 [ 293.944095][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 293.944265][ T11] ? cleanup_net+0x932/0xa40 [ 293.944388][ T11] print_report+0xb4/0x270 [ 293.944511][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 293.944634][ T11] kasan_report+0xbd/0xf0 [ 293.944729][ T11] ? cleanup_net+0x932/0xa40 [ 293.944852][ T11] cleanup_net+0x932/0xa40 [ 293.944974][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 293.945100][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 293.945220][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 293.945341][ T11] ? lock_acquire+0x32/0xc0 [ 293.945464][ T11] ? process_one_work+0xe0b/0x16d0 [ 293.945589][ T11] process_one_work+0xe55/0x16d0 [ 293.945714][ T11] ? __pfx___lock_release+0x10/0x10 [ 293.945837][ T11] ? __pfx_process_one_work+0x10/0x10 [ 293.945962][ T11] ? assign_work+0x16c/0x240 [ 293.946086][ T11] worker_thread+0x58c/0xce0 [ 293.946212][ T11] ? __pfx_worker_thread+0x10/0x10 [ 293.946334][ T11] kthread+0x28a/0x350 [ 293.946429][ T11] ? __pfx_kthread+0x10/0x10 [ 293.946552][ T11] ret_from_fork+0x31/0x70 [ 293.946673][ T11] ? __pfx_kthread+0x10/0x10 [ 293.946796][ T11] ret_from_fork_asm+0x1a/0x30 [ 293.946923][ T11] [ 293.947024][ T11] [ 293.947087][ T11] Allocated by task 313: [ 293.947179][ T11] kasan_save_stack+0x24/0x50 [ 293.947303][ T11] kasan_save_track+0x14/0x30 [ 293.947422][ T11] __kasan_slab_alloc+0x59/0x70 [ 293.947543][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 293.947666][ T11] copy_net_ns+0xc6/0x340 [ 293.947761][ T11] create_new_namespaces+0x35f/0x920 [ 293.947884][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 293.948007][ T11] ksys_unshare+0x2a9/0x660 [ 293.948129][ T11] __x64_sys_unshare+0x31/0x40 [ 293.948255][ T11] do_syscall_64+0xc1/0x1d0 [ 293.948378][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 293.948531][ T11] [ 293.948593][ T11] Freed by task 11: [ 293.948685][ T11] kasan_save_stack+0x24/0x50 [ 293.948808][ T11] kasan_save_track+0x14/0x30 [ 293.948936][ T11] kasan_save_free_info+0x3b/0x60 [ 293.949057][ T11] __kasan_slab_free+0x38/0x50 [ 293.949179][ T11] kmem_cache_free+0xf8/0x330 [ 293.949301][ T11] cleanup_net+0x5a8/0xa40 [ 293.949423][ T11] process_one_work+0xe55/0x16d0 [ 293.949545][ T11] worker_thread+0x58c/0xce0 [ 293.949663][ T11] kthread+0x28a/0x350 [ 293.949754][ T11] ret_from_fork+0x31/0x70 [ 293.949872][ T11] ret_from_fork_asm+0x1a/0x30 [ 293.949997][ T11] [ 293.950058][ T11] Last potentially related work creation: [ 293.950178][ T11] kasan_save_stack+0x24/0x50 [ 293.950301][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 293.950429][ T11] insert_work+0x34/0x230 [ 293.950530][ T11] __queue_work+0x5fd/0xa40 [ 293.950656][ T11] queue_delayed_work_on+0x8c/0xa0 [ 293.950782][ T11] __inet_insert_ifa+0x751/0xb10 [ 293.950907][ T11] inetdev_event+0xb18/0xcf0 [ 293.951032][ T11] notifier_call_chain+0xcd/0x150 [ 293.951154][ T11] __dev_notify_flags+0xe6/0x250 [ 293.951274][ T11] dev_change_flags+0xec/0x160 [ 293.951397][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 293.951523][ T11] rtnl_newlink+0x6de/0xa80 [ 293.951644][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 293.951771][ T11] netlink_rcv_skb+0x130/0x360 [ 293.951896][ T11] netlink_unicast+0x44b/0x710 [ 293.952021][ T11] netlink_sendmsg+0x723/0xbe0 [ 293.952142][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 293.952272][ T11] ___sys_sendmsg+0xee/0x170 [ 293.952396][ T11] __sys_sendmsg+0x109/0x1a0 [ 293.952517][ T11] do_syscall_64+0xc1/0x1d0 [ 293.952641][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 293.952794][ T11] [ 293.952854][ T11] The buggy address belongs to the object at ffff888004e2e540 [ 293.952854][ T11] which belongs to the cache net_namespace of size 6080 [ 293.953172][ T11] The buggy address is located 184 bytes inside of [ 293.953172][ T11] freed 6080-byte region [ffff888004e2e540, ffff888004e2fd00) [ 293.953459][ T11] [ 293.953520][ T11] The buggy address belongs to the physical page: [ 293.953667][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4e28 [ 293.953883][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 293.954133][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 293.954306][ T11] page_type: f5(slab) [ 293.954406][ T11] raw: 0080000000000040 ffff888001927240 ffff88800192c0a8 ffff88800192c0a8 [ 293.954696][ T11] raw: 0000000000000000 0000000000050005 00000001f5000000 0000000000000000 [ 293.954912][ T11] head: 0080000000000040 ffff888001927240 ffff88800192c0a8 ffff88800192c0a8 [ 293.955201][ T11] head: 0000000000000000 0000000000050005 00000001f5000000 0000000000000000 [ 293.955417][ T11] head: 0080000000000003 ffffea0000138a01 ffffffffffffffff 0000000000000000 [ 293.955636][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 293.955928][ T11] page dumped because: kasan: bad access detected [ 293.956081][ T11] [ 293.956142][ T11] Memory state around the buggy address: [ 293.956320][ T11] ffff888004e2e480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 293.956498][ T11] ffff888004e2e500: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 293.956677][ T11] >ffff888004e2e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 293.956911][ T11] ^ [ 293.957083][ T11] ffff888004e2e600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 293.957256][ T11] ffff888004e2e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 293.957492][ T11] ================================================================== [ 293.957719][ T11] Disabling lock debugging due to kernel taint