1From e56d66a033b533f26872a20cb2052473962a0f2e Mon Sep 17 00:00:00 2001
2From: 4ugustus <wangdw.augustus@qq.com>
3Date: Tue, 8 Mar 2022 16:22:04 +0000
4Subject: [PATCH] fix the FPE in tiffcrop (#393)
5
6CVE: CVE-2022-0909
7Upstream-Status: Backport
8Signed-off-by: Ross Burton <ross.burton@arm.com>
9
10---
11 libtiff/tif_dir.c | 4 ++--
12 1 file changed, 2 insertions(+), 2 deletions(-)
13
14diff --git a/libtiff/tif_dir.c b/libtiff/tif_dir.c
15index a6c254f..77da6ea 100644
16--- a/libtiff/tif_dir.c
17+++ b/libtiff/tif_dir.c
18@@ -335,13 +335,13 @@ _TIFFVSetField(TIFF* tif, uint32_t tag, va_list ap)
19 		break;
20 	case TIFFTAG_XRESOLUTION:
21         dblval = va_arg(ap, double);
22-        if( dblval < 0 )
23+        if( dblval != dblval || dblval < 0 )
24             goto badvaluedouble;
25 		td->td_xresolution = _TIFFClampDoubleToFloat( dblval );
26 		break;
27 	case TIFFTAG_YRESOLUTION:
28         dblval = va_arg(ap, double);
29-        if( dblval < 0 )
30+        if( dblval != dblval || dblval < 0 )
31             goto badvaluedouble;
32 		td->td_yresolution = _TIFFClampDoubleToFloat( dblval );
33 		break;
34