From: Steve French stfrench@microsoft.com
commit e80ddeb2f70ebd0786aa7cdba3e58bc931fa0bb5 upstream.
We were not checking to see if ioctl requests asked for more than 64K (ie when CIFSMaxBufSize was > 64K) so when setting larger CIFSMaxBufSize then ioctls would fail with invalid parameter errors. When requests ask for more than 64K in MaxOutputResponse then we need to ask for more than 1 credit.
Signed-off-by: Steve French stfrench@microsoft.com CC: Stable stable@vger.kernel.org Reviewed-by: Aurelien Aptel aaptel@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/cifs/smb2pdu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -2747,7 +2747,7 @@ SMB2_ioctl_init(struct cifs_tcon *tcon, * response size smaller. */ req->MaxOutputResponse = cpu_to_le32(max_response_size); - + req->sync_hdr.CreditCharge = cpu_to_le16(DIV_ROUND_UP(max_response_size, SMB2_MAX_BUFFER_SIZE)); if (is_fsctl) req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL); else