befs: check return of sb_min_blocksize

Confirm sb_min_blocksize() succeeded before continuing.

Link: http://lkml.kernel.org/r/1465700235-22881-1-git-send-email-luisbg@osg.samsung.com
Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index c734f21fd581..453bb68da219 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -756,6 +756,7 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
         long ret = -EINVAL;
         const unsigned long sb_block = 0;
         const off_t x86_sb_off = 512;
+        int blocksize;
 
         save_mount_options(sb, data);
 
@@ -788,7 +789,11 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
          * least 1k to get the second 512 bytes of the volume.
          * -WD 10-26-01
          */ 
-        sb_min_blocksize(sb, 1024);
+        blocksize = sb_min_blocksize(sb, 1024);
+        if (!blocksize) {
+                befs_error(sb, "unable to set blocksize");
+                goto unacquire_priv_sbp;
+        }
 
         if (!(bh = sb_bread(sb, sb_block))) {
                 if (!silent)