From: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx> When reading kuids from the wire map them into the initial user namespace, and validate the mapping succeded. When reading kgids from the wire map them into the initial user namespace, and validate the mapping succeded. Cc: "J. Bruce Fields" <bfields@xxxxxxxxxxxx> Cc: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx> Signed-off-by: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx> --- net/sunrpc/svcauth_unix.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c index bdea0a1..a1852e1 100644 --- a/net/sunrpc/svcauth_unix.c +++ b/net/sunrpc/svcauth_unix.c @@ -821,8 +821,10 @@ svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp) argv->iov_base = (void*)((__be32*)argv->iov_base + slen); /* skip machname */ argv->iov_len -= slen*4; - cred->cr_uid = svc_getnl(argv); /* uid */ - cred->cr_gid = svc_getnl(argv); /* gid */ + cred->cr_uid = make_kuid(&init_user_ns, svc_getnl(argv)); /* uid */ + cred->cr_gid = make_kgid(&init_user_ns, svc_getnl(argv)); /* gid */ + if (!uid_valid(cred->cr_uid) || !gid_valid(cred->cr_gid)) + goto badcred; slen = svc_getnl(argv); /* gids length */ if (slen > 16 || (len -= (slen + 2)*4) < 0) goto badcred; -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
