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[CIFS] possible memory corruption on mount 

CIFS cleanup_volume_info_contents() looks like having a memory
corruption problem.
When UNCip is set to "&vol->UNC[2]" in cifs_parse_mount_options(), it
should not be kfree()-ed in cleanup_volume_info_contents().

Introduced in commit b946845a9d

Signed-off-by: J.R. Okajima <hooanon05@yahoo.co.jp>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
CC: Stable <stable@kernel.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French 2011-08-18 04:41:55 +00:00
parent fa71f44706
commit 13589c437d
1 changed files with 2 additions and 1 deletions
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3
fs/cifs/connect.c
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@ -2878,7 +2878,8 @@ cleanup_volume_info_contents(struct smb_vol *volume_info)
kfree(volume_info->username);
kzfree(volume_info->password);
kfree(volume_info->UNC);
kfree(volume_info->UNCip);
if (volume_info->UNCip != volume_info->UNC + 2)
kfree(volume_info->UNCip);
kfree(volume_info->domainname);
kfree(volume_info->iocharset);
kfree(volume_info->prepath);