device syz0 left promiscuous mode ================================================================== BUG: KASAN: stack-out-of-bounds in xfrm_state_find+0x305b/0x3190 net/xfrm/xfrm_state.c:1051 Read of size 4 at addr ffff8801c55e7960 by task syz-executor4/13634 CPU: 0 PID: 13634 Comm: syz-executor4 Not tainted 4.14.0-rc2+ #20 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 device syz0 entered promiscuous mode 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+0x305b/0x3190 net/xfrm/xfrm_state.c:1051 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1388 [inline] xfrm_tmpl_resolve+0x2fb/0xbd0 net/xfrm/xfrm_policy.c:1432 xfrm_resolve_and_create_bundle+0x186/0x24b0 net/xfrm/xfrm_policy.c:1830 xfrm_lookup+0xf0a/0x2540 net/xfrm/xfrm_policy.c:2141 xfrm_lookup_route+0x39/0x1a0 net/xfrm/xfrm_policy.c:2259 ip_route_output_flow+0x7c/0xa0 net/ipv4/route.c:2549 raw_sendmsg+0xc4f/0x38c0 net/ipv4/raw.c:633 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:762 sock_sendmsg_nosec net/socket.c:633 [inline] sock_sendmsg+0xca/0x110 net/socket.c:643 SYSC_sendto+0x358/0x5a0 net/socket.c:1750 SyS_sendto+0x40/0x50 net/socket.c:1718 do_syscall_32_irqs_on arch/x86/entry/common.c:329 [inline] do_fast_syscall_32+0x3f2/0xf05 arch/x86/entry/common.c:391 entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124 RIP: 0023:0xf7ff4c79 RSP: 002b:00000000f77f005c EFLAGS: 00000296 ORIG_RAX: 0000000000000171 RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000020007f0f RDX: 0000000000000002 RSI: 0000000000000000 RDI: 000000002000e000 RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to the page: page:ffffea00071579c0 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x200000000000000() raw: 0200000000000000 0000000000000000 0000000000000000 00000000ffffffff raw: 0000000000000000 0000000100000001 0000000000000000 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801c55e7800: f2 00 f2 f2 f2 f2 f2 f2 f2 00 00 00 f2 f2 f2 f2 ffff8801c55e7880: f2 00 00 00 00 f2 f2 f2 f2 00 00 00 00 00 00 f2 >ffff8801c55e7900: f2 f2 f2 f2 f2 00 00 00 00 00 00 00 f2 f2 f2 f2 ^ ffff8801c55e7980: f2 00 00 00 00 00 00 00 00 00 f2 f2 f2 f3 f3 f3 ffff8801c55e7a00: f3 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 ==================================================================