From 29bb3158cf6a5ad7b3521d1229552f375107a58c Mon Sep 17 00:00:00 2001 From: Daniel N Pettersson Date: Thu, 27 Apr 2017 11:32:36 +0200 Subject: cifs: fix IPv6 link local, with scope id, address parsing When the IP address is gotten from the UNC, use only the address part of the UNC. Else all after the percent sign in an IPv6 link local address is interpreted as a scope id. This includes the slash and share name. A scope id is expected to be an integer and any trailing characters makes the conversion to integer fail. Example of mount command that fails: mount -i -t cifs //fe80::6a05:caff:fe3e:8ffc%2/test /mnt/t -o sec=none Signed-off-by: Daniel N Pettersson Signed-off-by: Steve French --- fs/cifs/connect.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'fs/cifs/connect.c') diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 0f2781677ccc..fef6156eb6c8 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -1945,9 +1945,14 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, } if (!got_ip) { + int len; + const char *slash; + /* No ip= option specified? Try to get it from UNC */ - if (!cifs_convert_address(dstaddr, &vol->UNC[2], - strlen(&vol->UNC[2]))) { + /* Use the address part of the UNC. */ + slash = strchr(&vol->UNC[2], '\\'); + len = slash - &vol->UNC[2]; + if (!cifs_convert_address(dstaddr, &vol->UNC[2], len)) { pr_err("Unable to determine destination address.\n"); goto cifs_parse_mount_err; } -- cgit v1.2.3-55-g7522