bcache: Fix a format string overflow

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Kent Overstreet <koverstreet@google.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/md/bcache/util.c b/drivers/md/bcache/util.c
index a9619d880354..da3a99e85b1e 100644
--- a/drivers/md/bcache/util.c
+++ b/drivers/md/bcache/util.c
@@ -76,7 +76,7 @@ STRTO_H(strtoull, unsigned long long)
 ssize_t bch_hprint(char *buf, int64_t v)
 {
         static const char units[] = "?kMGTPEZY";
-        char dec[3] = "";
+        char dec[4] = "";
         int u, t = 0;
 
         for (u = 0; v >= 1024 || v <= -1024; u++) {
@@ -88,7 +88,7 @@ ssize_t bch_hprint(char *buf, int64_t v)
                 return sprintf(buf, "%llu", v);
 
         if (v < 100 && v > -100)
-                sprintf(dec, ".%i", t / 100);
+                snprintf(dec, sizeof(dec), ".%i", t / 100);
 
         return sprintf(buf, "%lli%s%c", v, dec, units[u]);
 }