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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 gfn_to_memslot+0x275/0x470 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1597
Read of size 8 at addr ffff8880a3c81468 by task syz-executor.2/21862

CPU: 1 PID: 21862 Comm: syz-executor.2 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+0x1e9/0x30e lib/dump_stack.c:118
 print_address_description+0x74/0x5c0 mm/kasan/report.c:382
 __kasan_report+0x103/0x1a0 mm/kasan/report.c:511
 kasan_report+0x4d/0x80 mm/kasan/common.c:625

Allocated by task 21862:
 save_stack mm/kasan/common.c:49 [inline]
 set_track mm/kasan/common.c:57 [inline]
 __kasan_kmalloc+0x114/0x160 mm/kasan/common.c:495
 kmalloc_node include/linux/slab.h:578 [inline]
 kvmalloc_node+0x81/0x100 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+0x124/0x15b0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1118
 __kvm_set_memory_region+0x1388/0x16c0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1300
 kvm_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1321 [inline]
 kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1333 [inline]
 kvm_vm_ioctl+0x930/0x2530 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3604
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl fs/ioctl.c:763 [inline]
 __do_sys_ioctl fs/ioctl.c:772 [inline]
 __se_sys_ioctl+0xf9/0x160 fs/ioctl.c:770
 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3

Freed by task 9:
 save_stack mm/kasan/common.c:49 [inline]
 set_track mm/kasan/common.c:57 [inline]
 kasan_set_free_info mm/kasan/common.c:317 [inline]
 __kasan_slab_free+0x125/0x190 mm/kasan/common.c:456
 __cache_free mm/slab.c:3426 [inline]
 kfree+0x10a/0x220 mm/slab.c:3757
 skb_release_all net/core/skbuff.c:664 [inline]
 __kfree_skb+0x56/0x1c0 net/core/skbuff.c:678
 dccp_rcv_established+0x29b/0x310 net/dccp/input.c:376
 dccp_v4_do_rcv+0xc5/0x190 net/dccp/ipv4.c:655
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __sk_receive_skb+0x39a/0x940 net/core/sock.c:519
 ip_protocol_deliver_rcu+0x390/0x750 net/ipv4/ip_input.c:204
 ip_local_deliver_finish net/ipv4/ip_input.c:231 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x311/0x490 net/ipv4/ip_input.c:252
 __netif_receive_skb_one_core net/core/dev.c:5187 [inline]
 __netif_receive_skb+0x136/0x370 net/core/dev.c:5301
 process_backlog+0x4e8/0x950 net/core/dev.c:6133
 napi_poll net/core/dev.c:6571 [inline]
 net_rx_action+0x62f/0x1140 net/core/dev.c:6639
 __do_softirq+0x268/0x80c kernel/softirq.c:292

The buggy address belongs to the object at ffff8880a3c81000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1128 bytes inside of
 2048-byte region [ffff8880a3c81000, ffff8880a3c81800)
The buggy address belongs to the page:
page:ffffea00028f2040 refcount:1 mapcount:0 mapping:000000006a1c3df8 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea000251dd88 ffffea000231de88 ffff8880aa400e00
raw: 0000000000000000 ffff8880a3c81000 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880a3c81300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880a3c81380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880a3c81400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc
                                                          ^
 ffff8880a3c81480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880a3c81500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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