netdev - [iproute PATCH v4 2/6] lib/fs: Fix format string in find_fs

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Message-Id: <20170824095150.5469-3-phil@nwl.cc>
Date:   Thu, 24 Aug 2017 11:51:46 +0200
From:   Phil Sutter <phil@....cc>
To:     Stephen Hemminger <stephen@...workplumber.org>
Cc:     netdev@...r.kernel.org
Subject: [iproute PATCH v4 2/6] lib/fs: Fix format string in find_fs_mount()

A field width of 4096 allows fscanf() to store that amount of characters
into the given buffer, though that doesn't include the terminating NULL
byte. Decrease the value by one to leave space for it.

Signed-off-by: Phil Sutter <phil@....cc>
---
 lib/fs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/fs.c b/lib/fs.c
index c59ac564581d0..1ff881ecfcd8c 100644
--- a/lib/fs.c
+++ b/lib/fs.c
@@ -45,7 +45,7 @@ static char *find_fs_mount(const char *fs_to_find)
 		return NULL;
 	}
 
-	while (fscanf(fp, "%*s %4096s %127s %*s %*d %*d\n",
+	while (fscanf(fp, "%*s %4095s %127s %*s %*d %*d\n",
 		      path, fstype) == 2) {
 		if (strcmp(fstype, fs_to_find) == 0) {
 			mnt = strdup(path);
-- 
2.13.1