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no need to protect against put_user_ns(NULL)

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it's a no-op

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2019-05-12 12:42:58 -04:00
parent 1f58bb18f6
commit f7a9945184
3 changed files with 3 additions and 6 deletions
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3
arch/x86/kernel/cpu/resctrl/rdtgroup.c
View File

@ -2108,8 +2108,7 @@ static int rdt_init_fs_context(struct fs_context *fc)
ctx->kfc.magic = RDTGROUP_SUPER_MAGIC;
fc->fs_private = &ctx->kfc;
fc->ops = &rdt_fs_context_ops;
if (fc->user_ns)
put_user_ns(fc->user_ns);
put_user_ns(fc->user_ns);
fc->user_ns = get_user_ns(&init_user_ns);
fc->global = true;
return 0;

3
fs/sysfs/mount.c
View File

@ -72,8 +72,7 @@ static int sysfs_init_fs_context(struct fs_context *fc)
fc->fs_private = kfc;
fc->ops = &sysfs_fs_context_ops;
if (netns) {
if (fc->user_ns)
put_user_ns(fc->user_ns);
put_user_ns(fc->user_ns);
fc->user_ns = get_user_ns(netns->user_ns);
}
fc->global = true;

3
kernel/cgroup/cgroup.c
View File

@ -2184,8 +2184,7 @@ static int cgroup_init_fs_context(struct fs_context *fc)
fc->ops = &cgroup_fs_context_ops;
else
fc->ops = &cgroup1_fs_context_ops;
if (fc->user_ns)
put_user_ns(fc->user_ns);
put_user_ns(fc->user_ns);
fc->user_ns = get_user_ns(ctx->ns->user_ns);
fc->global = true;
return 0;