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copy_mnt_ns(): use the regular mechanism for freeing empty mnt_ns on failure

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Now that free_mnt_ns() works prior to mnt_ns_tree_add(), there's no need for
an open-coded analogue free_mnt_ns() there - yes, we do avoid one call_rcu()
use per failing call of clone() or unshare(), if they fail due to OOM in that
particular spot, but it's not really worth bothering.

Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2025-08-26 17:04:44 -04:00
parent 1b966c4471
commit 7bb4c851dc
1 changed files with 1 additions and 3 deletions
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4
fs/namespace.c
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@ -4184,10 +4184,8 @@ struct mnt_namespace *copy_mnt_ns(unsigned long flags, struct mnt_namespace *ns,
copy_flags |= CL_SLAVE;
new = copy_tree(old, old->mnt.mnt_root, copy_flags);
if (IS_ERR(new)) {
emptied_ns = new_ns;
namespace_unlock();
ns_free_inum(&new_ns->ns);
dec_mnt_namespaces(new_ns->ucounts);
mnt_ns_release(new_ns);
return ERR_CAST(new);
}
if (user_ns != ns->user_ns) {