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Diffstat (limited to 'kernel/fork.c')
-rw-r--r--kernel/fork.c22
1 files changed, 18 insertions, 4 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index 208dd99f13b..d6cc5655850 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1608,13 +1608,15 @@ asmlinkage long sys_unshare(unsigned long unshare_flags)
struct sem_undo_list *new_ulist = NULL;
struct nsproxy *new_nsproxy = NULL, *old_nsproxy = NULL;
struct uts_namespace *uts, *new_uts = NULL;
+ struct ipc_namespace *ipc, *new_ipc = NULL;
check_unshare_flags(&unshare_flags);
/* Return -EINVAL for all unsupported flags */
err = -EINVAL;
if (unshare_flags & ~(CLONE_THREAD|CLONE_FS|CLONE_NEWNS|CLONE_SIGHAND|
- CLONE_VM|CLONE_FILES|CLONE_SYSVSEM|CLONE_NEWUTS))
+ CLONE_VM|CLONE_FILES|CLONE_SYSVSEM|
+ CLONE_NEWUTS|CLONE_NEWIPC))
goto bad_unshare_out;
if ((err = unshare_thread(unshare_flags)))
@@ -1633,18 +1635,20 @@ asmlinkage long sys_unshare(unsigned long unshare_flags)
goto bad_unshare_cleanup_fd;
if ((err = unshare_utsname(unshare_flags, &new_uts)))
goto bad_unshare_cleanup_semundo;
+ if ((err = unshare_ipcs(unshare_flags, &new_ipc)))
+ goto bad_unshare_cleanup_uts;
- if (new_ns || new_uts) {
+ if (new_ns || new_uts || new_ipc) {
old_nsproxy = current->nsproxy;
new_nsproxy = dup_namespaces(old_nsproxy);
if (!new_nsproxy) {
err = -ENOMEM;
- goto bad_unshare_cleanup_uts;
+ goto bad_unshare_cleanup_ipc;
}
}
if (new_fs || new_ns || new_sigh || new_mm || new_fd || new_ulist ||
- new_uts) {
+ new_uts || new_ipc) {
task_lock(current);
@@ -1692,12 +1696,22 @@ asmlinkage long sys_unshare(unsigned long unshare_flags)
new_uts = uts;
}
+ if (new_ipc) {
+ ipc = current->nsproxy->ipc_ns;
+ current->nsproxy->ipc_ns = new_ipc;
+ new_ipc = ipc;
+ }
+
task_unlock(current);
}
if (new_nsproxy)
put_nsproxy(new_nsproxy);
+bad_unshare_cleanup_ipc:
+ if (new_ipc)
+ put_ipc_ns(new_ipc);
+
bad_unshare_cleanup_uts:
if (new_uts)
put_uts_ns(new_uts);