audit: type=1400 audit(1514140920.198:7): avc: denied { map } for pid=3152 comm="syzkaller532199" path="/root/syzkaller532199226" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 ================================================================== BUG: KASAN: stack-out-of-bounds in xfrm_state_find+0x30de/0x3210 net/xfrm/xfrm_state.c:1050 Read of size 4 at addr ffff8801bb8075a0 by task syzkaller532199/3152 CPU: 1 PID: 3152 Comm: syzkaller532199 Not tainted 4.15.0-rc5+ #147 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+0x194/0x257 lib/dump_stack.c:53 print_address_description+0x73/0x250 mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report+0x25b/0x340 mm/kasan/report.c:409 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:429 xfrm_state_find+0x30de/0x3210 net/xfrm/xfrm_state.c:1050 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1388 [inline] xfrm_tmpl_resolve+0x30e/0xc10 net/xfrm/xfrm_policy.c:1432 xfrm_resolve_and_create_bundle+0x123/0x25f0 net/xfrm/xfrm_policy.c:1821 xfrm_lookup+0x1574/0x23f0 net/xfrm/xfrm_policy.c:2146 xfrm_lookup_route+0x39/0x1a0 net/xfrm/xfrm_policy.c:2264 ip_route_output_flow+0x7c/0xa0 net/ipv4/route.c:2559 udp_sendmsg+0x19d3/0x2cf0 net/ipv4/udp.c:1019 udpv6_sendmsg+0x762/0x33a0 net/ipv6/udp.c:1186 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:763 sock_sendmsg_nosec net/socket.c:636 [inline] sock_sendmsg+0xca/0x110 net/socket.c:646 SYSC_sendto+0x361/0x5c0 net/socket.c:1727 SyS_sendto+0x40/0x50 net/socket.c:1695 do_syscall_32_irqs_on arch/x86/entry/common.c:327 [inline] do_fast_syscall_32+0x3ee/0xf9d arch/x86/entry/common.c:389 entry_SYSENTER_compat+0x54/0x63 arch/x86/entry/entry_64_compat.S:125 RIP: 0023:0xf7faac79 RSP: 002b:00000000ffa8613c EFLAGS: 00000282 ORIG_RAX: 0000000000000171 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000002028a000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020999000 RBP: 000000000000001c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to the page: page:000000007a6cdafd count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x2fffc0000000000() raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff raw: 0000000000000000 ffffea0006ee01e0 0000000000000000 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801bb807480: f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2 f2 f8 f2 f2 ffff8801bb807500: f2 f2 f2 f2 f2 00 00 00 00 f2 f2 f2 f2 00 00 00 >ffff8801bb807580: 00 00 00 00 f2 f2 f2 f2 f2 00 00 00 00 00 00 00 ^ ffff8801bb807600: 00 00 f2 f2 f2 00 00 00 00 00 00 00 00 00 00 00 ffff8801bb807680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================