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CIFS: check new file size when extending file by fallocate

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xfstests generic/228 checks if fallocate respect RLIMIT_FSIZE.
After fallocate mode 0 extending enabled, we can hit this failure.
Fix this by check the new file size with vfs helper, return
error if file size is larger then RLIMIT_FSIZE(ulimit -f).

This patch has been tested by LTP/xfstests aginst samba and
Windows server.

Acked-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Murphy Zhou <jencce.kernel@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org>
This commit is contained in:
Murphy Zhou 2020-03-18 20:43:38 +08:00 committed by Steve French
parent 8895c66f2b
commit ef4a632ccc
1 changed files with 4 additions and 0 deletions
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4
fs/cifs/smb2ops.c
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@ -3255,6 +3255,10 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
* Extending the file
*/
if ((keep_size == false) && i_size_read(inode) < off + len) {
rc = inode_newsize_ok(inode, off + len);
if (rc)
goto out;
if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0)
smb2_set_sparse(xid, tcon, cfile, inode, false);