audit: type=1400 audit(1512819902.033:7): avc: denied { map } for pid=3150 comm="syzkaller737163" path="/root/syzkaller737163190" 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+0x30fc/0x3230 net/xfrm/xfrm_state.c:1050 Read of size 4 at addr ffff8801c4e47760 by task syzkaller737163/3150 CPU: 1 PID: 3150 Comm: syzkaller737163 Not tainted 4.15.0-rc2+ #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+0x30fc/0x3230 net/xfrm/xfrm_state.c:1050 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1388 [inline] xfrm_tmpl_resolve+0x309/0xc00 net/xfrm/xfrm_policy.c:1432 xfrm_resolve_and_create_bundle+0x12c/0x2770 net/xfrm/xfrm_policy.c:1823 xfrm_lookup+0x156b/0x23e0 net/xfrm/xfrm_policy.c:2148 xfrm_lookup_route+0x39/0x1a0 net/xfrm/xfrm_policy.c:2266 ip_route_output_flow+0x7c/0xa0 net/ipv4/route.c:2559 udp_sendmsg+0x19b8/0x2cc0 net/ipv4/udp.c:999 udpv6_sendmsg+0x743/0x3380 net/ipv6/udp.c:1156 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:763 sock_sendmsg_nosec net/socket.c:632 [inline] sock_sendmsg+0xca/0x110 net/socket.c:642 SYSC_sendto+0x358/0x5a0 net/socket.c:1749 SyS_sendto+0x40/0x50 net/socket.c:1717 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x43ff59 RSP: 002b:00007ffc613cb828 EFLAGS: 00000217 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0100000000000000 RCX: 000000000043ff59 RDX: 0000000000000000 RSI: 000000002028a000 RDI: 0000000000000003 RBP: 00000000006ca018 R08: 0000000020999000 R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018c0 R13: 0000000000401950 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to the page: page:000000001d8f29b7 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x2fffc0000000000() raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff raw: 0000000000000000 0000000100000001 0000000000000000 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801c4e47600: 00 f1 f1 f1 f1 04 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 ffff8801c4e47680: f2 f2 f2 f2 f2 f8 f2 f2 f2 f2 f2 f2 f2 00 00 00 >ffff8801c4e47700: 00 f2 f2 f2 f2 00 00 00 00 00 00 00 f2 f2 f2 f2 ^ ffff8801c4e47780: f2 00 00 00 00 00 00 00 00 00 f2 f2 f2 f3 f3 f3 ffff8801c4e47800: f3 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================