random: sshd: uninitialized urandom read (32 bytes read, 122 bits of entropy available) ================================================================== BUG: KASAN: stack-out-of-bounds in xfrm_state_find+0x1291/0x2550 net/xfrm/xfrm_state.c:799 Read of size 4 at addr ffff8801d250fad8 by task syzkaller039574/3313 CPU: 1 PID: 3313 Comm: syzkaller039574 Not tainted 4.4.107-g610c835 #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 fc42d2339519d358 ffff8801d250f128 ffffffff81d0457d ffffea00074943c0 ffff8801d250fad8 0000000000000000 ffff8801d250fad8 ffff8800b50dbe30 ffff8801d250f160 ffffffff814fbb23 ffff8801d250fad8 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x124 lib/dump_stack.c:51 [] print_address_description+0x73/0x260 mm/kasan/report.c:252 [] kasan_report_error mm/kasan/report.c:351 [inline] [] kasan_report+0x285/0x370 mm/kasan/report.c:408 [] __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:428 [] xfrm_state_find+0x1291/0x2550 net/xfrm/xfrm_state.c:799 [] xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1444 [inline] [] xfrm_tmpl_resolve+0x298/0xab0 net/xfrm/xfrm_policy.c:1488 [] xfrm_resolve_and_create_bundle+0xd7/0x1da0 net/xfrm/xfrm_policy.c:1836 [] xfrm_lookup+0x991/0xc10 net/xfrm/xfrm_policy.c:2190 [] xfrm_lookup_route+0x39/0x1a0 net/xfrm/xfrm_policy.c:2312 [] ip_route_output_flow+0x7f/0xa0 net/ipv4/route.c:2424 [] udp_sendmsg+0x1009/0x1c30 net/ipv4/udp.c:1038 [] inet_sendmsg+0x2bc/0x4c0 net/ipv4/af_inet.c:755 [] sock_sendmsg_nosec net/socket.c:625 [inline] [] sock_sendmsg+0xca/0x110 net/socket.c:635 [] SYSC_sendto+0x2c8/0x340 net/socket.c:1665 [] SyS_sendto+0x40/0x50 net/socket.c:1633 [] do_syscall_32_irqs_on arch/x86/entry/common.c:390 [inline] [] do_fast_syscall_32+0x314/0x890 arch/x86/entry/common.c:457 [] sysenter_flags_fixed+0xd/0x17 The buggy address belongs to the page: page:ffffea00074943c0 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x8000000000000000() page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d250f980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801d250fa00: f1 f1 f1 f1 00 f2 f2 f2 f2 f2 f2 f2 00 00 00 f2 >ffff8801d250fa80: f2 f2 f2 f2 00 00 00 00 00 00 00 f2 f2 f2 f2 f2 ^ ffff8801d250fb00: 00 00 00 00 00 00 00 00 00 f2 f2 f2 00 00 00 00 ffff8801d250fb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================