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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_vcpu_gfn_to_memslot+0x50e/0x540 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1603
Read of size 8 at addr ffff888051c3b468 by task syz-executor.2/16251

CPU: 1 PID: 16251 Comm: syz-executor.2 Not tainted 5.7.0-rc1-next-20200415-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_vcpu_gfn_to_memslot+0x50e/0x540 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1603
 kvm_vcpu_read_guest_page+0x27/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2270
 kvm_read_guest_page_mmu+0xf0/0x160 arch/x86/kvm/x86.c:686
 load_pdptrs+0xb0/0x290 arch/x86/kvm/x86.c:714
 __set_sregs+0x923/0x1100 arch/x86/kvm/x86.c:9065
 kvm_arch_vcpu_ioctl_set_sregs+0x21/0x40 arch/x86/kvm/x86.c:9112
 kvm_vcpu_ioctl+0x281/0xe60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3195
 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: 0033:0x45ca29
Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fafc991dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e8640 RCX: 000000000045ca29
RDX: 0000000020000780 RSI: 000000004138ae84 RDI: 0000000000000005
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000003e0 R14: 00000000004c693b R15: 00007fafc991e6d4

Allocated by task 16251:
 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:757 [inline]
 kvzalloc include/linux/mm.h:765 [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
 kvm_set_memory_region+0x29/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1321
 kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1333 [inline]
 kvm_vm_ioctl+0x678/0x2400 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3604
 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 27:
 save_stack+0x1b/0x40 mm/kasan/common.c:49
 set_track mm/kasan/common.c:57 [inline]
 kasan_set_free_info mm/kasan/common.c:317 [inline]
 __kasan_slab_free+0xf7/0x140 mm/kasan/common.c:456
 __cache_free mm/slab.c:3426 [inline]
 kfree+0x109/0x2b0 mm/slab.c:3757
 skb_free_head+0x8b/0xa0 net/core/skbuff.c:590
 pskb_expand_head+0x2b1/0x1020 net/core/skbuff.c:1660
 netlink_trim+0x1ea/0x240 net/netlink/af_netlink.c:1285
 netlink_broadcast_filtered+0x5f/0xd40 net/netlink/af_netlink.c:1490
 netlink_broadcast+0x35/0x40 net/netlink/af_netlink.c:1535
 nlmsg_multicast include/net/netlink.h:968 [inline]
 kauditd_send_multicast_skb+0x376/0x3e0 kernel/audit.c:799
 kauditd_send_queue+0x54/0x210 kernel/audit.c:724
 kauditd_thread+0x7f1/0xb80 kernel/audit.c:855
 kthread+0x388/0x470 kernel/kthread.c:268
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

The buggy address belongs to the object at ffff888051c3b000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1128 bytes inside of
 2048-byte region [ffff888051c3b000, ffff888051c3b800)
The buggy address belongs to the page:
page:ffffea0001470ec0 refcount:1 mapcount:0 mapping:00000000fa93ac57 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea00016cf108 ffffea0002855a88 ffff8880aa000e00
raw: 0000000000000000 ffff888051c3b000 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888051c3b300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888051c3b380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888051c3b400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc
                                                          ^
 ffff888051c3b480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888051c3b500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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