From b0e77598f87107001a00b8a4ece9c95e4254ccc4 Mon Sep 17 00:00:00 2001 From: "Serge E. Hallyn" Date: Wed, 23 Mar 2011 16:43:24 -0700 Subject: userns: user namespaces: convert several capable() calls CAP_IPC_OWNER and CAP_IPC_LOCK can be checked against current_user_ns(), because the resource comes from current's own ipc namespace. setuid/setgid are to uids in own namespace, so again checks can be against current_user_ns(). Changelog: Jan 11: Use task_ns_capable() in place of sched_capable(). Jan 11: Use nsown_capable() as suggested by Bastian Blank. Jan 11: Clarify (hopefully) some logic in futex and sched.c Feb 15: use ns_capable for ipc, not nsown_capable Feb 23: let copy_ipcs handle setting ipc_ns->user_ns Feb 23: pass ns down rather than taking it from current [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Serge E. Hallyn Acked-by: "Eric W. Biederman" Acked-by: Daniel Lezcano Acked-by: David Howells Cc: James Morris Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- ipc/msg.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'ipc/msg.c') diff --git a/ipc/msg.c b/ipc/msg.c index 747b65507a91..0e732e92e22f 100644 --- a/ipc/msg.c +++ b/ipc/msg.c @@ -421,7 +421,7 @@ static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd, return -EFAULT; } - ipcp = ipcctl_pre_down(&msg_ids(ns), msqid, cmd, + ipcp = ipcctl_pre_down(ns, &msg_ids(ns), msqid, cmd, &msqid64.msg_perm, msqid64.msg_qbytes); if (IS_ERR(ipcp)) return PTR_ERR(ipcp); @@ -539,7 +539,7 @@ SYSCALL_DEFINE3(msgctl, int, msqid, int, cmd, struct msqid_ds __user *, buf) success_return = 0; } err = -EACCES; - if (ipcperms(&msq->q_perm, S_IRUGO)) + if (ipcperms(ns, &msq->q_perm, S_IRUGO)) goto out_unlock; err = security_msg_queue_msgctl(msq, cmd); @@ -664,7 +664,7 @@ long do_msgsnd(int msqid, long mtype, void __user *mtext, struct msg_sender s; err = -EACCES; - if (ipcperms(&msq->q_perm, S_IWUGO)) + if (ipcperms(ns, &msq->q_perm, S_IWUGO)) goto out_unlock_free; err = security_msg_queue_msgsnd(msq, msg, msgflg); @@ -774,7 +774,7 @@ long do_msgrcv(int msqid, long *pmtype, void __user *mtext, struct list_head *tmp; msg = ERR_PTR(-EACCES); - if (ipcperms(&msq->q_perm, S_IRUGO)) + if (ipcperms(ns, &msq->q_perm, S_IRUGO)) goto out_unlock; msg = ERR_PTR(-EAGAIN); -- cgit v1.2.3