ocfs2: check new file size on fallocate call

When changing a file size with fallocate() the new size isn't being
checked.  In particular, the FSIZE ulimit isn't being checked, which makes
fstest generic/228 fail.  Simply adding a call to inode_newsize_ok() fixes
this issue.

Link: https://lkml.kernel.org/r/20230529152645.32680-1-lhenriques@suse.de
Signed-off-by: Luís Henriques <lhenriques@suse.de>
Reviewed-by: Mark Fasheh <mark@fasheh.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index efb09de..b173c36 100644 (file)
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2100,14 +2100,20 @@ static long ocfs2_fallocate(struct file *file, int mode, loff_t offset,
        struct ocfs2_space_resv sr;
        int change_size = 1;
        int cmd = OCFS2_IOC_RESVSP64;
+       int ret = 0;
 
        if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
                return -EOPNOTSUPP;
        if (!ocfs2_writes_unwritten_extents(osb))
                return -EOPNOTSUPP;
 
-       if (mode & FALLOC_FL_KEEP_SIZE)
+       if (mode & FALLOC_FL_KEEP_SIZE) {
                change_size = 0;
+       } else {
+               ret = inode_newsize_ok(inode, offset + len);
+               if (ret)
+                       return ret;
+       }
 
        if (mode & FALLOC_FL_PUNCH_HOLE)
                cmd = OCFS2_IOC_UNRESVSP64;