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authorJ. Bruce Fields <bfields@citi.umich.edu>2008-08-21 00:10:23 +0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2008-10-08 02:17:47 +0400
commitea31a4437c59219bf3ea946d58984b01a45a289c (patch)
treed386f91c39461c7505e614f0b281f0e7e9b99298 /fs/nfs/nfs4namespace.c
parentf0c929251e01a7a86b6254c775cb6b65c6457f10 (diff)
downloadlinux-ea31a4437c59219bf3ea946d58984b01a45a289c.tar.xz
nfs: Fix misparsing of nfsv4 fs_locations attribute
The code incorrectly assumes here that the server name (or ip address) is null-terminated. This can cause referrals to fail in some cases. Also support ipv6 addresses. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4namespace.c')
-rw-r--r--fs/nfs/nfs4namespace.c44
1 files changed, 18 insertions, 26 deletions
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index 6bcc5696f911..30befc39b3c6 100644
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -93,50 +93,42 @@ static int nfs4_validate_fspath(const struct vfsmount *mnt_parent,
return 0;
}
-/*
- * Check if the string represents a "valid" IPv4 address
- */
-static inline int valid_ipaddr4(const char *buf)
-{
- int rc, count, in[4];
-
- rc = sscanf(buf, "%d.%d.%d.%d", &in[0], &in[1], &in[2], &in[3]);
- if (rc != 4)
- return -EINVAL;
- for (count = 0; count < 4; count++) {
- if (in[count] > 255)
- return -EINVAL;
- }
- return 0;
-}
-
static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,
char *page, char *page2,
const struct nfs4_fs_location *location)
{
struct vfsmount *mnt = ERR_PTR(-ENOENT);
char *mnt_path;
+ int page2len;
unsigned int s;
mnt_path = nfs4_pathname_string(&location->rootpath, page2, PAGE_SIZE);
if (IS_ERR(mnt_path))
return mnt;
mountdata->mnt_path = mnt_path;
+ page2 += strlen(mnt_path) + 1;
+ page2len = PAGE_SIZE - strlen(mnt_path) - 1;
for (s = 0; s < location->nservers; s++) {
- struct sockaddr_in addr = {
- .sin_family = AF_INET,
- .sin_port = htons(NFS_PORT),
- };
+ const struct nfs4_string *buf = &location->servers[s];
+ struct sockaddr_storage addr;
- if (location->servers[s].len <= 0 ||
- valid_ipaddr4(location->servers[s].data) < 0)
+ if (buf->len <= 0 || buf->len >= PAGE_SIZE)
continue;
- mountdata->hostname = location->servers[s].data;
- addr.sin_addr.s_addr = in_aton(mountdata->hostname),
mountdata->addr = (struct sockaddr *)&addr;
- mountdata->addrlen = sizeof(addr);
+
+ if (memchr(buf->data, IPV6_SCOPE_DELIMITER, buf->len))
+ continue;
+ nfs_parse_ip_address(buf->data, buf->len,
+ mountdata->addr, &mountdata->addrlen);
+ if (mountdata->addr->sa_family == AF_UNSPEC)
+ continue;
+ nfs_set_port(mountdata->addr, NFS_PORT);
+
+ strncpy(page2, buf->data, page2len);
+ page2[page2len] = '\0';
+ mountdata->hostname = page2;
snprintf(page, PAGE_SIZE, "%s:%s",
mountdata->hostname,