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authorBob Peterson <rpeterso@redhat.com>2013-02-01 12:03:02 -0500
committerSteven Whitehouse <swhiteho@redhat.com>2013-02-01 20:37:33 +0000
commitd2b47cfb26fe06002b8011707baac71a9ae8166f (patch)
treebe4f83991b3945536e5cb336cba3b47262ff633d
parent4506a519f2a76775e6c236f44d50e9f79a7d3434 (diff)
downloadop-kernel-dev-d2b47cfb26fe06002b8011707baac71a9ae8166f.zip
op-kernel-dev-d2b47cfb26fe06002b8011707baac71a9ae8166f.tar.gz
GFS2: Get a block reservation before resizing a file
This patch allocates a block reservation structure before growing or shrinking a file. Without this structure, the grow or shink code can reference the bad pointer. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
-rw-r--r--fs/gfs2/bmap.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index d29d779..df686d1 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -1288,6 +1288,10 @@ int gfs2_setattr_size(struct inode *inode, u64 newsize)
inode_dio_wait(inode);
+ ret = gfs2_rs_alloc(GFS2_I(inode));
+ if (ret)
+ return ret;
+
oldsize = inode->i_size;
if (newsize >= oldsize)
return do_grow(inode, newsize);
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