From f5f9cd078adc085bc74cc5465a975beac8d4c5d3 Mon Sep 17 00:00:00 2001 From: Bob Peterson Date: Fri, 1 Feb 2013 12:03:02 -0500 Subject: [PATCH] GFS2: Get a block reservation before resizing a file commit d2b47cfb26fe06002b8011707baac71a9ae8166f upstream. 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 Signed-off-by: Steven Whitehouse Signed-off-by: Greg Kroah-Hartman --- fs/gfs2/bmap.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index a68e91bcef3d..9a3945a7f48f 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -1286,6 +1286,10 @@ 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); -- 2.39.5