diff options
| author | Bob Peterson <rpeterso@redhat.com> | 2013-02-01 12:03:02 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-02-27 09:21:11 -0800 |
| commit | 496064cd2a5ec740671a522e5fa154ce91dfb012 (patch) | |
| tree | 3fb128c55a447c322e0f8a7596b0de5a6c009987 | |
| parent | a56de15779ba561c66c9fa04e6339f9a044b2001 (diff) | |
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 <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/gfs2/bmap.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 1fd3ae237bdd..8f331e07177c 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -1240,6 +1240,10 @@ 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); |