[ 11.424348][ T277] veth0: renamed from veth-rt-1 [ 12.297478][ T286] veth0: renamed from veth-rt-2 [ 19.230650][ T67] ================================================================== [ 19.230956][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 19.231167][ T67] Read of size 8 at addr ffff888009c580f8 by task kworker/u16:1/67 [ 19.231362][ T67] [ 19.231435][ T67] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 19.231645][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 19.231820][ T67] Workqueue: netns cleanup_net [ 19.231966][ T67] Call Trace: [ 19.232074][ T67] [ 19.232144][ T67] dump_stack_lvl+0x82/0xd0 [ 19.232285][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 19.232461][ T67] ? cleanup_net+0xa5d/0xb90 [ 19.232600][ T67] print_report+0xb4/0x270 [ 19.232745][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 19.232883][ T67] kasan_report+0xbd/0xf0 [ 19.232989][ T67] ? cleanup_net+0xa5d/0xb90 [ 19.233126][ T67] cleanup_net+0xa5d/0xb90 [ 19.233264][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 19.233402][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 19.233539][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 19.233676][ T67] ? lock_acquire+0x32/0xc0 [ 19.233813][ T67] ? process_one_work+0xe0b/0x16d0 [ 19.233956][ T67] process_one_work+0xe55/0x16d0 [ 19.234099][ T67] ? __pfx___lock_release+0x10/0x10 [ 19.234234][ T67] ? __pfx_process_one_work+0x10/0x10 [ 19.234375][ T67] ? assign_work+0x16c/0x240 [ 19.234513][ T67] worker_thread+0x58c/0xce0 [ 19.234653][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 19.234825][ T67] ? __pfx_worker_thread+0x10/0x10 [ 19.234967][ T67] ? __pfx_worker_thread+0x10/0x10 [ 19.235106][ T67] kthread+0x28a/0x350 [ 19.235214][ T67] ? __pfx_kthread+0x10/0x10 [ 19.235349][ T67] ret_from_fork+0x31/0x70 [ 19.235498][ T67] ? __pfx_kthread+0x10/0x10 [ 19.235637][ T67] ret_from_fork_asm+0x1a/0x30 [ 19.235780][ T67] [ 19.235883][ T67] [ 19.235952][ T67] Allocated by task 262: [ 19.236068][ T67] kasan_save_stack+0x24/0x50 [ 19.236212][ T67] kasan_save_track+0x14/0x30 [ 19.236347][ T67] __kasan_slab_alloc+0x59/0x70 [ 19.236485][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 19.236622][ T67] copy_net_ns+0xc6/0x540 [ 19.236726][ T67] create_new_namespaces+0x35f/0x920 [ 19.236863][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 19.237004][ T67] ksys_unshare+0x2c4/0x6e0 [ 19.237145][ T67] __x64_sys_unshare+0x31/0x40 [ 19.237284][ T67] do_syscall_64+0xc1/0x1d0 [ 19.237423][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 19.237596][ T67] [ 19.237668][ T67] Freed by task 67: [ 19.237769][ T67] kasan_save_stack+0x24/0x50 [ 19.237907][ T67] kasan_save_track+0x14/0x30 [ 19.238041][ T67] kasan_save_free_info+0x3b/0x60 [ 19.238183][ T67] __kasan_slab_free+0x38/0x50 [ 19.238321][ T67] kmem_cache_free+0xf8/0x330 [ 19.238455][ T67] cleanup_net+0x5a8/0xb90 [ 19.238591][ T67] process_one_work+0xe55/0x16d0 [ 19.238729][ T67] worker_thread+0x58c/0xce0 [ 19.238864][ T67] kthread+0x28a/0x350 [ 19.238966][ T67] ret_from_fork+0x31/0x70 [ 19.239099][ T67] ret_from_fork_asm+0x1a/0x30 [ 19.239239][ T67] [ 19.239311][ T67] Last potentially related work creation: [ 19.239444][ T67] kasan_save_stack+0x24/0x50 [ 19.239583][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 19.239720][ T67] insert_work+0x34/0x230 [ 19.239827][ T67] __queue_work+0x5fd/0xa40 [ 19.239967][ T67] queue_delayed_work_on+0x8c/0xa0 [ 19.240103][ T67] __inet_insert_ifa+0x751/0xb10 [ 19.240266][ T67] inetdev_event+0xb18/0xcf0 [ 19.240403][ T67] notifier_call_chain+0xcd/0x150 [ 19.240549][ T67] __dev_notify_flags+0xe6/0x250 [ 19.240693][ T67] dev_change_flags+0xec/0x160 [ 19.240832][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 19.240978][ T67] rtnl_newlink+0x6de/0xa80 [ 19.241118][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 19.241262][ T67] netlink_rcv_skb+0x130/0x360 [ 19.241402][ T67] netlink_unicast+0x44b/0x710 [ 19.241547][ T67] netlink_sendmsg+0x723/0xbe0 [ 19.241683][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 19.241819][ T67] ___sys_sendmsg+0xee/0x170 [ 19.241957][ T67] __sys_sendmsg+0x109/0x1a0 [ 19.242105][ T67] do_syscall_64+0xc1/0x1d0 [ 19.242244][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 19.242421][ T67] [ 19.242489][ T67] The buggy address belongs to the object at ffff888009c58040 [ 19.242489][ T67] which belongs to the cache net_namespace of size 6528 [ 19.242855][ T67] The buggy address is located 184 bytes inside of [ 19.242855][ T67] freed 6528-byte region [ffff888009c58040, ffff888009c599c0) [ 19.243189][ T67] [ 19.243266][ T67] The buggy address belongs to the physical page: [ 19.243433][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9c58 [ 19.243678][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 19.243887][ T67] flags: 0x80000000000040(head|node=0|zone=1) [ 19.244061][ T67] page_type: f5(slab) [ 19.244169][ T67] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 19.244420][ T67] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 19.244662][ T67] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 19.244910][ T67] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 19.245159][ T67] head: 0080000000000003 ffffea0000271601 ffffffffffffffff 0000000000000000 [ 19.245409][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 19.245658][ T67] page dumped because: kasan: bad access detected [ 19.245832][ T67] [ 19.245903][ T67] Memory state around the buggy address: [ 19.246054][ T67] ffff888009c57f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.246265][ T67] ffff888009c58000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 19.246462][ T67] >ffff888009c58080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.246669][ T67] ^ [ 19.246867][ T67] ffff888009c58100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.247078][ T67] ffff888009c58180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.247277][ T67] ================================================================== [ 19.247504][ T67] Disabling lock debugging due to kernel taint