From 50b64e3b77d569c217a48e078cd565dbd6462ad0 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Tue, 2 Jun 2009 06:55:20 -0400 Subject: [PATCH] cifs: fix IPv6 address length check For IPv6 the userspace mount helper sends an address in the "ip=" option. This check fails if the length is > 35 characters. I have no idea where the magic 35 character limit came from, but it's clearly not enough for IPv6. Fix it by making it use the INET6_ADDRSTRLEN #define. While we're at it, use the same #define for the address length in SPNEGO upcalls. Reported-by: Charles R. Anderson Signed-off-by: Jeff Layton Signed-off-by: Steve French --- fs/cifs/cifs_spnego.c | 6 ++---- fs/cifs/connect.c | 4 +++- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/fs/cifs/cifs_spnego.c b/fs/cifs/cifs_spnego.c index 67bf93a40d2..4a4581cb2b5 100644 --- a/fs/cifs/cifs_spnego.c +++ b/fs/cifs/cifs_spnego.c @@ -23,6 +23,7 @@ #include #include #include +#include #include "cifsglob.h" #include "cifs_spnego.h" #include "cifs_debug.h" @@ -73,9 +74,6 @@ struct key_type cifs_spnego_key_type = { * strlen(";sec=ntlmsspi") */ #define MAX_MECH_STR_LEN 13 -/* max possible addr len eg FEDC:BA98:7654:3210:FEDC:BA98:7654:3210/128 */ -#define MAX_IPV6_ADDR_LEN 43 - /* strlen of "host=" */ #define HOST_KEY_LEN 5 @@ -102,7 +100,7 @@ cifs_get_spnego_key(struct cifsSesInfo *sesInfo) host=hostname sec=mechanism uid=0xFF user=username */ desc_len = MAX_VER_STR_LEN + HOST_KEY_LEN + strlen(hostname) + - IP_KEY_LEN + MAX_IPV6_ADDR_LEN + + IP_KEY_LEN + INET6_ADDRSTRLEN + MAX_MECH_STR_LEN + UID_KEY_LEN + (sizeof(uid_t) * 2) + USER_KEY_LEN + strlen(sesInfo->userName) + 1; diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 8ae563f028b..74b5a87e919 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -35,6 +35,7 @@ #include #include #include +#include #include #include "cifspdu.h" #include "cifsglob.h" @@ -960,7 +961,8 @@ cifs_parse_mount_options(char *options, const char *devname, } else if (strnicmp(data, "ip", 2) == 0) { if (!value || !*value) { vol->UNCip = NULL; - } else if (strnlen(value, 35) < 35) { + } else if (strnlen(value, INET6_ADDRSTRLEN) < + INET6_ADDRSTRLEN) { vol->UNCip = value; } else { printk(KERN_WARNING "CIFS: ip address " -- 2.20.1