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authorEric W. Biederman <ebiederm@xmission.com>2012-11-16 07:03:03 +0400
committerDavid S. Miller <davem@davemloft.net>2012-11-19 05:32:45 +0400
commit00f70de09c418bfb028d03f046e39c1d301db7b2 (patch)
tree64d7445491c57decffaf71df79e0671c8b7324b0
parent86937c05cb44654649a089744cd49ab0dc6873a8 (diff)
downloadlinux-00f70de09c418bfb028d03f046e39c1d301db7b2.tar.xz
net: Allow userns root to force the scm creds
If the user calling sendmsg has the appropriate privieleges in their user namespace allow them to set the uid, gid, and pid in the SCM_CREDENTIALS control message to any valid value. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/core/scm.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/net/core/scm.c b/net/core/scm.c
index ab570841a532..57fb1ee6649f 100644
--- a/net/core/scm.c
+++ b/net/core/scm.c
@@ -51,11 +51,11 @@ static __inline__ int scm_check_creds(struct ucred *creds)
if (!uid_valid(uid) || !gid_valid(gid))
return -EINVAL;
- if ((creds->pid == task_tgid_vnr(current) || capable(CAP_SYS_ADMIN)) &&
+ if ((creds->pid == task_tgid_vnr(current) || nsown_capable(CAP_SYS_ADMIN)) &&
((uid_eq(uid, cred->uid) || uid_eq(uid, cred->euid) ||
- uid_eq(uid, cred->suid)) || capable(CAP_SETUID)) &&
+ uid_eq(uid, cred->suid)) || nsown_capable(CAP_SETUID)) &&
((gid_eq(gid, cred->gid) || gid_eq(gid, cred->egid) ||
- gid_eq(gid, cred->sgid)) || capable(CAP_SETGID))) {
+ gid_eq(gid, cred->sgid)) || nsown_capable(CAP_SETGID))) {
return 0;
}
return -EPERM;