cifs: set correct max-buffer-size for smb2_ioctl_init() (731b82bb) · Commits · 戴 / test

Fix two places where we need to adjust down the max response size for ioctl when it is used together with compounding. Signed-off-by:

Pavel Shilovsky <pshilov@microsoft.com> CC: Stable <stable@vger.kernel.org>

fs/cifs/smb2ops.c

+7 −2

Original line number	Diff line number	Diff line
		@@ -1523,7 +1523,9 @@ smb2_ioctl_query_info(const unsigned int xid,
		COMPOUND_FID, COMPOUND_FID,
		qi.info_type, true, buffer,
		qi.output_buffer_length,
		CIFSMaxBufSize);
		CIFSMaxBufSize -
		MAX_SMB2_CREATE_RESPONSE_SIZE -
		MAX_SMB2_CLOSE_RESPONSE_SIZE);
		}
		} else if (qi.flags == PASSTHRU_SET_INFO) {
		/* Can eventually relax perm check since server enforces too */
		@@ -2769,7 +2771,10 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,

		rc = SMB2_ioctl_init(tcon, &rqst[1], fid.persistent_fid,
		fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
		true /* is_fctl */, NULL, 0, CIFSMaxBufSize);
		true /* is_fctl */, NULL, 0,
		CIFSMaxBufSize -
		MAX_SMB2_CREATE_RESPONSE_SIZE -
		MAX_SMB2_CLOSE_RESPONSE_SIZE);
		if (rc)
		goto querty_exit;