From: Jan-Marek Glogowski <glogow@fbihome.de>
Date: Tue, 20 Sep 2011 18:33:22 +0000 (-0400)
Subject: idmapd: Fix decoding of octal encoded fields
X-Git-Tag: nfs-utils-1-2-5-rc3~2
X-Git-Url: https://git.decadent.org.uk/gitweb/?p=nfs-utils.git;a=commitdiff_plain;h=076b91078411b6a2c99c8d85bc10ded5c64a7019

idmapd: Fix decoding of octal encoded fields

The decoded octal will always be positive and (char) -1 is negative. Any
field containing an encoded octal will be rejected.

As the encoded value should be an unsigned char, fix the check to reject
all values > (unsigned char) -1 = UCHAR_MAX, as this indicate an error
in the encoding.

Signed-off-by: Jan-Marek Glogowski <glogow@fbihome.de>
Signed-off-by: Steve Dickson <steved@redhat.com>
---

diff --git a/utils/idmapd/idmapd.c b/utils/idmapd/idmapd.c
index 76a56ef..19d9114 100644
--- a/utils/idmapd/idmapd.c
+++ b/utils/idmapd/idmapd.c
@@ -925,9 +925,9 @@ getfield(char **bpp, char *fld, size_t fldsz)
 		if (*bp == '\\') {
 			if ((n = sscanf(bp, "\\%03o", &val)) != 1)
 				return (-1);
-			if (val > (char)-1)
+			if (val > UCHAR_MAX)
 				return (-1);
-			*fld++ = (char)val;
+			*fld++ = val;
 			bp += 4;
 		} else {
 			*fld++ = *bp;