================================================================== 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 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1597 [inline] BUG: KASAN: slab-out-of-bounds in kvm_read_guest_page+0x4b5/0x4d0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2261 Read of size 8 at addr ffff8880a17ad468 by task syz-executor.0/9425 CPU: 0 PID: 9425 Comm: syz-executor.0 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] gfn_to_memslot arch/x86/kvm/../../../virt/kvm/kvm_main.c:1597 [inline] kvm_read_guest_page+0x4b5/0x4d0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2261 kvm_read_guest+0x51/0xd0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2284 kvm_write_wall_clock arch/x86/kvm/x86.c:1721 [inline] kvm_set_msr_common+0xdf3/0x27c0 arch/x86/kvm/x86.c:2851 vmx_set_msr+0xa83/0x26a0 arch/x86/kvm/vmx/vmx.c:2183 __kvm_set_msr+0x15f/0x2d0 arch/x86/kvm/x86.c:1504 __msr_io arch/x86/kvm/x86.c:3262 [inline] msr_io+0x173/0x290 arch/x86/kvm/x86.c:3298 kvm_arch_vcpu_ioctl+0x1004/0x2c20 arch/x86/kvm/x86.c:4355 kvm_vcpu_ioctl+0x866/0xe60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3291 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 9425: 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 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+0x678/0x23e0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3604 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 7474: 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 kvfree+0x42/0x50 mm/util.c:603 __do_replace+0x6a3/0x8c0 net/ipv6/netfilter/ip6_tables.c:1104 compat_do_replace.isra.0+0x24f/0x380 net/ipv6/netfilter/ip6_tables.c:1532 compat_do_ip6t_set_ctl+0x119/0x160 net/ipv6/netfilter/ip6_tables.c:1557 compat_nf_sockopt net/netfilter/nf_sockopt.c:144 [inline] compat_nf_setsockopt+0x87/0x120 net/netfilter/nf_sockopt.c:156 compat_ipv6_setsockopt net/ipv6/ipv6_sockglue.c:986 [inline] compat_ipv6_setsockopt+0x1a1/0x210 net/ipv6/ipv6_sockglue.c:962 inet_csk_compat_setsockopt+0x8d/0x100 net/ipv4/inet_connection_sock.c:1085 compat_tcp_setsockopt+0x45/0x80 net/ipv4/tcp.c:3178 compat_sock_common_setsockopt+0xaa/0x120 net/core/sock.c:3183 __compat_sys_setsockopt+0x15d/0x310 net/compat.c:400 __do_compat_sys_socketcall net/compat.c:803 [inline] __se_compat_sys_socketcall net/compat.c:735 [inline] __ia32_compat_sys_socketcall+0x520/0x660 net/compat.c:735 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 ffff8880a17ad000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1128 bytes inside of 2048-byte region [ffff8880a17ad000, ffff8880a17ad800) The buggy address belongs to the page: page:ffffea000285eb40 refcount:1 mapcount:0 mapping:00000000507da8ca index:0x0 flags: 0xfffe0000000200(slab) raw: 00fffe0000000200 ffffea00025eb948 ffffea00018b9448 ffff8880aa000e00 raw: 0000000000000000 ffff8880a17ad000 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a17ad300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880a17ad380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880a17ad400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc ^ ffff8880a17ad480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a17ad500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================