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[PATCH] ipcns: fix !CONFIG_IPC_NS behavior

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When CONFIG_IPC_NS=n, clone(CLONE_NEWIPC) claims success, but did not actually
clone a new IPC namespace.

Fix this to return -EINVAL so the caller knows his request was denied.

Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Serge E. Hallyn 2007-03-26 21:32:31 -08:00 committed by Linus Torvalds
parent d1985ad1da
commit a28d193cbf
2 changed files with 10 additions and 6 deletions
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9
include/linux/ipc.h
View File

@ -92,19 +92,16 @@ extern struct ipc_namespace init_ipc_ns;
#ifdef CONFIG_SYSVIPC
#define INIT_IPC_NS(ns) .ns = &init_ipc_ns,
extern int copy_ipcs(unsigned long flags, struct task_struct *tsk);
#else
#define INIT_IPC_NS(ns)
static inline int copy_ipcs(unsigned long flags, struct task_struct *tsk)
{ return 0; }
#endif
#ifdef CONFIG_IPC_NS
extern void free_ipc_ns(struct kref *kref);
extern int copy_ipcs(unsigned long flags, struct task_struct *tsk);
extern int unshare_ipcs(unsigned long flags, struct ipc_namespace **ns);
#else
static inline int copy_ipcs(unsigned long flags, struct task_struct *tsk)
{
return 0;
}
#endif
static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns)

7
ipc/util.c
View File

@ -144,6 +144,13 @@ void free_ipc_ns(struct kref *kref)
shm_exit_ns(ns);
kfree(ns);
}
#else
int copy_ipcs(unsigned long flags, struct task_struct *tsk)
{
if (flags & CLONE_NEWIPC)
return -EINVAL;
return 0;
}
#endif
/**