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---
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 kpartx/kpartx.c |   23 ++++++++++++++++-------
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 1 file changed, 16 insertions(+), 7 deletions(-)
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Index: multipath-tools-130222/kpartx/kpartx.c
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===================================================================
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--- multipath-tools-130222.orig/kpartx/kpartx.c
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+++ multipath-tools-130222/kpartx/kpartx.c
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@@ -114,10 +114,13 @@ set_delimiter (char * device, char * del
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 {
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 	char * p = device;
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-	while (*(p++) != 0x0)
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+	if (*p == 0x0)
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+		return;
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+
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+	while (*(++p) != 0x0)
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 		continue;
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-	if (isdigit(*(p - 2)))
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+	if (isdigit(*(p - 1)))
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 		*delimiter = 'p';
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 }
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@@ -136,15 +139,17 @@ strip_slash (char * device)
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 static int
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 find_devname_offset (char * device)
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 {
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-	char *p, *q = NULL;
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+	char *p, *q;
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-	p = device;
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+	q = p = device;
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-	while (*p++)
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+	while (*p) {
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 		if (*p == '/')
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-			q = p;
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+			q = p + 1;
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+		p++;
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+	}
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-	return (int)(q - device) + 1;
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+	return (int)(q - device);
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 }
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 static char *
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@@ -343,6 +348,10 @@ main(int argc, char **argv){
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 		}
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 		device = loopdev;
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 	}
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+	else if (!S_ISBLK(buf.st_mode)) {
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+		fprintf(stderr, "invalid device: %s\n", device);
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+		exit(1);
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+	}
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 	off = find_devname_offset(device);
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