| From | Greg Kroah-Hartman <> | Subject | [ 059/150] GFS2: Get a block reservation before resizing a file | Date | Tue, 26 Feb 2013 15:55:16 -0800 |
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3.8-stable review patch. If anyone has any objections, please let me know.
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From: Bob Peterson <rpeterso@redhat.com>
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>
--- fs/gfs2/bmap.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -1286,6 +1286,10 @@ int gfs2_setattr_size(struct inode *inod 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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