audit: type=1400 audit(1583689857.235:36): avc: denied { map } for pid=7344 comm="syz-executor611" path="/root/syz-executor611707297" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
netlink: 20 bytes leftover after parsing attributes in process `syz-executor611'.
audit: type=1400 audit(1583689857.235:37): avc: denied { create } for pid=7344 comm="syz-executor611" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1
audit: type=1400 audit(1583689857.235:38): avc: denied { write } for pid=7344 comm="syz-executor611" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1
==================================================================
BUG: KASAN: global-out-of-bounds in nfnetlink_parse_nat net/netfilter/nf_nat_core.c:747 [inline]
BUG: KASAN: global-out-of-bounds in nfnetlink_parse_nat_setup+0x364/0x370 net/netfilter/nf_nat_core.c:784
Read of size 8 at addr ffffffff873c8e38 by task syz-executor611/7344
CPU: 1 PID: 7344 Comm: syz-executor611 Not tainted 4.14.172-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x13e/0x194 lib/dump_stack.c:58
print_address_description.cold+0x5/0x1e2 mm/kasan/report.c:252
kasan_report_error mm/kasan/report.c:351 [inline]
kasan_report mm/kasan/report.c:409 [inline]
kasan_report.cold+0xa9/0x2ae mm/kasan/report.c:393
nfnetlink_parse_nat net/netfilter/nf_nat_core.c:747 [inline]
nfnetlink_parse_nat_setup+0x364/0x370 net/netfilter/nf_nat_core.c:784
ctnetlink_parse_nat_setup+0x70/0x490 net/netfilter/nf_conntrack_netlink.c:1421
ctnetlink_setup_nat net/netfilter/nf_conntrack_netlink.c:1491 [inline]
ctnetlink_create_conntrack+0x437/0x1040 net/netfilter/nf_conntrack_netlink.c:1840
ctnetlink_new_conntrack+0x460/0xc30 net/netfilter/nf_conntrack_netlink.c:1964
nfnetlink_rcv_msg+0xa08/0xc00 net/netfilter/nfnetlink.c:214
netlink_rcv_skb+0x127/0x370 net/netlink/af_netlink.c:2432
nfnetlink_rcv+0x1ab/0x1650 net/netfilter/nfnetlink.c:515
netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline]
netlink_unicast+0x437/0x620 net/netlink/af_netlink.c:1312
netlink_sendmsg+0x733/0xbe0 net/netlink/af_netlink.c:1877
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xc5/0x100 net/socket.c:656
___sys_sendmsg+0x70a/0x840 net/socket.c:2062
__sys_sendmsg+0xa3/0x120 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x27/0x40 net/socket.c:2103
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4401a9
RSP: 002b:00007fff4821d358 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401a9
RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a30
R13: 0000000000401ac0 R14: 0000000000000000 R15: 0000000000000000
The buggy address belongs to the variable:
nft_bitwise_policy+0xb8/0xc0
Memory state around the buggy address:
ffffffff873c8d00: 00 00 00 00 00 00 00 00 00 00 00 fa fa fa fa fa
ffffffff873c8d80: 00 00 00 00 00 00 00 00 00 00 00 00 fa fa fa fa
>ffffffff873c8e00: 00 02 fa fa fa fa fa fa 00 00 00 00 00 00 00 00
^
ffffffff873c8e80: 00 00 00 fa fa fa fa fa 00 00 00 00 00 00 00 00
ffffffff873c8f00: 00 00 00 00 fa fa fa fa 00 00 00 04 fa fa fa fa
==================================================================