mdadm/0009-mdadm-Specify-enough-length-when-write-to-buffer.patch

From ff9239ee3177630d62c7a58408992af7a779763c Mon Sep 17 00:00:00 2001
From: Xiao Ni <xni@redhat.com>
Date: Fri, 17 Mar 2017 19:55:43 +0800
Subject: [PATCH] mdadm: Specify enough length when write to buffer
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

In Detail.c the buffer path in function Detail is defined as path[200],
in fact the max lenth of content which needs to write to the buffer is
287. Because the length of dname of struct dirent is 255.
During building it reports error:
error: ‘%s’ directive writing up to 255 bytes into a region of size 189
[-Werror=format-overflow=]

In function examine_super0 there is a buffer nb with length 5.
But it need to show a int type argument. The lenght of max
number of int is 10. So the buffer length should be 11.

In human_size function the length of buf is 30. During building
there is a error:
output between 20 and 47 bytes into a destination of size 30.
Change the length to 47.

Signed-off-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@gmail.com>
---
 Detail.c | 2 +-
 super0.c | 2 +-
 util.c   | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/Detail.c b/Detail.c
index 509b0d4..cb33794 100644
--- a/Detail.c
+++ b/Detail.c
@@ -575,7 +575,7 @@ This is pretty boring
 			printf("  Member Arrays :");
 
 			while (dir && (de = readdir(dir)) != NULL) {
-				char path[200];
+				char path[287];
 				char vbuf[1024];
 				int nlen = strlen(sra->sys_name);
 				dev_t devid;
diff --git a/super0.c b/super0.c
index 938cfd9..f5b4507 100644
--- a/super0.c
+++ b/super0.c
@@ -231,7 +231,7 @@ static void examine_super0(struct supertype *st, char *homehost)
 	     d++) {
 		mdp_disk_t *dp;
 		char *dv;
-		char nb[5];
+		char nb[11];
 		int wonly, failfast;
 		if (d>=0) dp = &sb->disks[d];
 		else dp = &sb->this_disk;
diff --git a/util.c b/util.c
index f100972..32bd909 100644
--- a/util.c
+++ b/util.c
@@ -811,7 +811,7 @@ unsigned long calc_csum(void *super, int bytes)
 #ifndef MDASSEMBLE
 char *human_size(long long bytes)
 {
-	static char buf[30];
+	static char buf[47];
 
 	/* We convert bytes to either centi-M{ega,ibi}bytes or
 	 * centi-G{igi,ibi}bytes, with appropriate rounding,
-- 
2.10.2