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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 ffff88805fcc6468 by task syz-executor.3/18917

CPU: 0 PID: 18917 Comm: syz-executor.3 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:374
 __kasan_report.cold+0x35/0x4d mm/kasan/report.c:503
 kasan_report+0x33/0x50 mm/kasan/common.c:648
 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_write_guest_page arch/x86/kvm/../../../virt/kvm/kvm_main.c:2372 [inline]
 kvm_vcpu_write_guest+0x48/0xd0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2408
 enter_smm+0xa12/0x1740 arch/x86/kvm/x86.c:7959
 inject_pending_event arch/x86/kvm/x86.c:7735 [inline]
 vcpu_enter_guest+0x1f2a/0x59d0 arch/x86/kvm/x86.c:8289
 vcpu_run arch/x86/kvm/x86.c:8533 [inline]
 kvm_arch_vcpu_ioctl_run+0x3fb/0x16a0 arch/x86/kvm/x86.c:8755
 kvm_vcpu_ioctl+0x493/0xe60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3138
 kvm_vcpu_compat_ioctl+0x1ab/0x350 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3334
 __do_compat_sys_ioctl fs/ioctl.c:857 [inline]
 __se_compat_sys_ioctl fs/ioctl.c:808 [inline]
 __ia32_compat_sys_ioctl+0x23d/0x2b0 fs/ioctl.c:808
 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline]
 do_fast_syscall_32+0x270/0xe90 arch/x86/entry/common.c:396
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139

Allocated by task 18925:
 save_stack+0x1b/0x80 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 __kasan_kmalloc mm/kasan/common.c:518 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:491
 kmalloc_node include/linux/slab.h:578 [inline]
 kvmalloc_node+0x61/0xf0 mm/util.c:574
 kvmalloc include/linux/mm.h:733 [inline]
 kvzalloc include/linux/mm.h:741 [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+0x2ef/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
 kvm_vm_compat_ioctl+0x125/0x240 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3798
 __do_compat_sys_ioctl fs/ioctl.c:857 [inline]
 __se_compat_sys_ioctl fs/ioctl.c:808 [inline]
 __ia32_compat_sys_ioctl+0x23d/0x2b0 fs/ioctl.c:808
 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline]
 do_fast_syscall_32+0x270/0xe90 arch/x86/entry/common.c:396
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139

Freed by task 17816:
 save_stack+0x1b/0x80 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 kasan_set_free_info mm/kasan/common.c:340 [inline]
 __kasan_slab_free+0xf7/0x140 mm/kasan/common.c:479
 __cache_free mm/slab.c:3426 [inline]
 kfree+0x109/0x2b0 mm/slab.c:3757
 skb_free_head+0x8b/0xa0 net/core/skbuff.c:590
 skb_release_data+0x42e/0x8b0 net/core/skbuff.c:610
 skb_release_all+0x46/0x60 net/core/skbuff.c:664
 __kfree_skb net/core/skbuff.c:678 [inline]
 consume_skb net/core/skbuff.c:837 [inline]
 consume_skb+0xf3/0x400 net/core/skbuff.c:831
 netlink_broadcast_filtered+0x34f/0xd40 net/netlink/af_netlink.c:1513
 netlink_broadcast net/netlink/af_netlink.c:1535 [inline]
 nlmsg_multicast include/net/netlink.h:968 [inline]
 nlmsg_notify+0x90/0x250 net/netlink/af_netlink.c:2512
 rtnl_notify net/core/rtnetlink.c:737 [inline]
 rtmsg_ifinfo_send net/core/rtnetlink.c:3719 [inline]
 rtmsg_ifinfo_event.part.0+0xb6/0xe0 net/core/rtnetlink.c:3734
 rtmsg_ifinfo_event net/core/rtnetlink.c:3742 [inline]
 rtmsg_ifinfo+0x7f/0xa0 net/core/rtnetlink.c:3740
 netdev_state_change net/core/dev.c:1385 [inline]
 netdev_state_change+0x121/0x140 net/core/dev.c:1376
 do_setlink+0x15f0/0x3680 net/core/rtnetlink.c:2828
 rtnl_group_changelink net/core/rtnetlink.c:3117 [inline]
 __rtnl_newlink+0xc96/0x1590 net/core/rtnetlink.c:3271
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3391
 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5454
 netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2469
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6bf/0x7e0 net/socket.c:2362
 ___sys_sendmsg+0x100/0x170 net/socket.c:2416
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2449
 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline]
 do_fast_syscall_32+0x270/0xe90 arch/x86/entry/common.c:396
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139

The buggy address belongs to the object at ffff88805fcc6000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1128 bytes inside of
 2048-byte region [ffff88805fcc6000, ffff88805fcc6800)
The buggy address belongs to the page:
page:ffffea00017f3180 refcount:1 mapcount:0 mapping:0000000060d31fc3 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea000244bb88 ffffea00014d6948 ffff8880aa000e00
raw: 0000000000000000 ffff88805fcc6000 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88805fcc6300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88805fcc6380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88805fcc6400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc
                                                          ^
 ffff88805fcc6480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88805fcc6500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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