IPVS: ftp: loaded support on port[0] = 21 L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. ================================================================== BUG: KASAN: slab-out-of-bounds in search_memslots include/linux/kvm_host.h:1051 [inline] BUG: KASAN: slab-out-of-bounds in __gfn_to_memslot include/linux/kvm_host.h:1063 [inline] BUG: KASAN: slab-out-of-bounds in __kvm_gfn_to_hva_cache_init+0x5fb/0x670 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2443 Read of size 8 at addr ffff8880a6092468 by task syz-executor842/7204 CPU: 1 PID: 7204 Comm: syz-executor842 Not tainted 5.6.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xd3/0x315 mm/kasan/report.c:382 __kasan_report.cold+0x35/0x4d mm/kasan/report.c:511 kasan_report+0x33/0x50 mm/kasan/common.c:625 search_memslots include/linux/kvm_host.h:1051 [inline] __gfn_to_memslot include/linux/kvm_host.h:1063 [inline] __kvm_gfn_to_hva_cache_init+0x5fb/0x670 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2443 kvm_lapic_set_vapic_addr+0x88/0x180 arch/x86/kvm/lapic.c:2665 kvm_arch_vcpu_ioctl+0xf0d/0x2c20 arch/x86/kvm/x86.c:4385 kvm_vcpu_ioctl+0x866/0xe60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3291 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0x11a/0x180 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:770 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x440a59 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffc05830798 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004a21f0 RCX: 0000000000440a59 RDX: 0000000020000080 RSI: 000000004008ae93 RDI: 0000000000000005 RBP: 00007ffc058307a0 R08: 0000000120080522 R09: 0000000120080522 R10: 0000000120080522 R11: 0000000000000246 R12: 00000000004a21f0 R13: 0000000000401ff0 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 7204: save_stack+0x1b/0x40 mm/kasan/common.c:49 set_track mm/kasan/common.c:57 [inline] __kasan_kmalloc mm/kasan/common.c:495 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:468 kmalloc_node include/linux/slab.h:578 [inline] kvmalloc_node+0x61/0xf0 mm/util.c:574 kvmalloc include/linux/mm.h:739 [inline] kvzalloc include/linux/mm.h:747 [inline] kvm_dup_memslots arch/x86/kvm/../../../virt/kvm/kvm_main.c:1101 [inline] kvm_set_memslot+0x115/0x1530 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1118 __kvm_set_memory_region+0xcf7/0x1320 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1300 __x86_set_memory_region+0x2a3/0x5a0 arch/x86/kvm/x86.c:9845 alloc_apic_access_page arch/x86/kvm/vmx/vmx.c:3544 [inline] vmx_create_vcpu+0x2107/0x2b40 arch/x86/kvm/vmx/vmx.c:6772 kvm_arch_vcpu_create+0x6ef/0xb80 arch/x86/kvm/x86.c:9365 kvm_vm_ioctl_create_vcpu arch/x86/kvm/../../../virt/kvm/kvm_main.c:3030 [inline] kvm_vm_ioctl+0x15f7/0x23e0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3585 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0x11a/0x180 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:770 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8880a6092000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1128 bytes inside of 2048-byte region [ffff8880a6092000, ffff8880a6092800) The buggy address belongs to the page: page:ffffea0002982480 refcount:1 mapcount:0 mapping:00000000e5782c39 index:0x0 flags: 0xfffe0000000200(slab) raw: 00fffe0000000200 ffffea000279d608 ffffea00027fdd88 ffff8880aa000e00 raw: 0000000000000000 ffff8880a6092000 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a6092300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880a6092380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880a6092400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc ^ ffff8880a6092480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a6092500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================