Commit 4fe9e963 authored by Sachin Prabhu's avatar Sachin Prabhu Committed by Steve French
Browse files

Cleanup handling of NULL value passed for a mount option 



Allow blank user= and ip= mount option. Also clean up redundant
checks for NULL values since the token parser will not actually
match mount options with NULL values unless explicitly specified.

Signed-off-by: default avatarSachin Prabhu <sprabhu@redhat.com>
Reported-by: default avatarChris Clayton <chris2553@googlemail.com>
Acked-by: default avatarJeff Layton <jlayton@samba.org>
Tested-by: default avatarChris Clayton <chris2553@googlemail.com>
Signed-off-by: default avatarSteve French <sfrench@us.ibm.com>
parent f68e556e

fs/cifs/connect.c

+19 −61
Original line number Diff line number Diff line
@@ -109,6 +109,8 @@ enum { 


	/* Options which could be blank */

	Opt_blank_pass,

	Opt_blank_user,

	Opt_blank_ip,



	Opt_err

};
@@ -183,11 +185,15 @@ static const match_table_t cifs_mount_option_tokens = { 
	{ Opt_wsize, "wsize=%s" },

	{ Opt_actimeo, "actimeo=%s" },



	{ Opt_blank_user, "user=" },

	{ Opt_blank_user, "username=" },

	{ Opt_user, "user=%s" },

	{ Opt_user, "username=%s" },

	{ Opt_blank_pass, "pass=" },

	{ Opt_pass, "pass=%s" },

	{ Opt_pass, "password=%s" },

	{ Opt_blank_ip, "ip=" },

	{ Opt_blank_ip, "addr=" },

	{ Opt_ip, "ip=%s" },

	{ Opt_ip, "addr=%s" },

	{ Opt_unc, "unc=%s" },
@@ -1534,15 +1540,17 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, 


		/* String Arguments */



		case Opt_blank_user:

			/* null user, ie. anonymous authentication */

			vol->nullauth = 1;

			vol->username = NULL;

			break;

		case Opt_user:

			string = match_strdup(args);

			if (string == NULL)

				goto out_nomem;



			if (!*string) {

				/* null user, ie. anonymous authentication */

				vol->nullauth = 1;

			} else if (strnlen(string, MAX_USERNAME_SIZE) >

			if (strnlen(string, MAX_USERNAME_SIZE) >

							MAX_USERNAME_SIZE) {

				printk(KERN_WARNING "CIFS: username too long\n");

				goto cifs_parse_mount_err;
@@ -1611,14 +1619,15 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, 
			}

			vol->password[j] = '\0';

			break;

		case Opt_blank_ip:

			vol->UNCip = NULL;

			break;

		case Opt_ip:

			string = match_strdup(args);

			if (string == NULL)

				goto out_nomem;



			if (!*string) {

				vol->UNCip = NULL;

			} else if (strnlen(string, INET6_ADDRSTRLEN) >

			if (strnlen(string, INET6_ADDRSTRLEN) >

						INET6_ADDRSTRLEN) {

				printk(KERN_WARNING "CIFS: ip address "

						    "too long\n");
@@ -1636,12 +1645,6 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, 
			if (string == NULL)

				goto out_nomem;



			if (!*string) {

				printk(KERN_WARNING "CIFS: invalid path to "

						    "network resource\n");

				goto cifs_parse_mount_err;

			}



			temp_len = strnlen(string, 300);

			if (temp_len  == 300) {

				printk(KERN_WARNING "CIFS: UNC name too long\n");
@@ -1670,11 +1673,7 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, 
			if (string == NULL)

				goto out_nomem;



			if (!*string) {

				printk(KERN_WARNING "CIFS: invalid domain"

						    " name\n");

				goto cifs_parse_mount_err;

			} else if (strnlen(string, 256) == 256) {

			if (strnlen(string, 256) == 256) {

				printk(KERN_WARNING "CIFS: domain name too"

						    " long\n");

				goto cifs_parse_mount_err;
@@ -1693,11 +1692,7 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, 
			if (string == NULL)

				goto out_nomem;



			if (!*string) {

				printk(KERN_WARNING "CIFS: srcaddr value not"

						    " specified\n");

				goto cifs_parse_mount_err;

			} else if (!cifs_convert_address(

			if (!cifs_convert_address(

					(struct sockaddr *)&vol->srcaddr,

					string, strlen(string))) {

				printk(KERN_WARNING "CIFS:  Could not parse"
@@ -1710,11 +1705,6 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, 
			if (string == NULL)

				goto out_nomem;



			if (!*string) {

				printk(KERN_WARNING "CIFS: Invalid path"

						    " prefix\n");

				goto cifs_parse_mount_err;

			}

			temp_len = strnlen(string, 1024);

			if (string[0] != '/')

				temp_len++; /* missing leading slash */
@@ -1742,11 +1732,7 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, 
			if (string == NULL)

				goto out_nomem;



			if (!*string) {

				printk(KERN_WARNING "CIFS: Invalid iocharset"

						    " specified\n");

				goto cifs_parse_mount_err;

			} else if (strnlen(string, 1024) >= 65) {

			if (strnlen(string, 1024) >= 65) {

				printk(KERN_WARNING "CIFS: iocharset name "

						    "too long.\n");

				goto cifs_parse_mount_err;
@@ -1771,11 +1757,6 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, 
			if (string == NULL)

				goto out_nomem;



			if (!*string) {

				printk(KERN_WARNING "CIFS: No socket option"

						    " specified\n");

				goto cifs_parse_mount_err;

			}

			if (strnicmp(string, "TCP_NODELAY", 11) == 0)

				vol->sockopt_tcp_nodelay = 1;

			break;
@@ -1784,12 +1765,6 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, 
			if (string == NULL)

				goto out_nomem;



			if (!*string) {

				printk(KERN_WARNING "CIFS: Invalid (empty)"

						    " netbiosname\n");

				break;

			}



			memset(vol->source_rfc1001_name, 0x20,

				RFC1001_NAME_LEN);

			/*
@@ -1817,11 +1792,6 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, 
			if (string == NULL)

				goto out_nomem;



			if (!*string) {

				printk(KERN_WARNING "CIFS: Empty server"

					" netbiosname specified\n");

				break;

			}

			/* last byte, type, is 0x20 for servr type */

			memset(vol->target_rfc1001_name, 0x20,

				RFC1001_NAME_LEN_WITH_NULL);
@@ -1848,12 +1818,6 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, 
			if (string == NULL)

				goto out_nomem;



			if (!*string) {

				cERROR(1, "no protocol version specified"

					  " after vers= mount option");

				goto cifs_parse_mount_err;

			}



			if (strnicmp(string, "cifs", 4) == 0 ||

			    strnicmp(string, "1", 1) == 0) {

				/* This is the default */
@@ -1868,12 +1832,6 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, 
			if (string == NULL)

				goto out_nomem;



			if (!*string) {

				printk(KERN_WARNING "CIFS: no security flavor"

						    " specified\n");

				break;

			}



			if (cifs_parse_security_flavors(string, vol) != 0)

				goto cifs_parse_mount_err;

			break;

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