[GFS2] possible null pointer dereference fixup

gfs2_alloc_get may fail so we have to check it to prevent
NULL pointer dereference.

Signed-off-by: Cyrill Gorcunov <gorcunov@gamil.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/fs/gfs2/eattr.c b/fs/gfs2/eattr.c
index 76ead1acfcc7..288d5e6ad93a 100644
--- a/fs/gfs2/eattr.c
+++ b/fs/gfs2/eattr.c
@@ -318,6 +318,8 @@ static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
         int error;
 
         al = gfs2_alloc_get(ip);
+        if (!al)
+                return -ENOMEM;
 
         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
         if (error)
@@ -681,6 +683,8 @@ static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
         int error;
 
         al = gfs2_alloc_get(ip);
+        if (!al)
+                return -ENOMEM;
 
         error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
         if (error)
@@ -1464,6 +1468,8 @@ int gfs2_ea_dealloc(struct gfs2_inode *ip)
         int error;
 
         al = gfs2_alloc_get(ip);
+        if (!al)
+                return -ENOMEM;
 
         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
         if (error)