From 46cf047a945c7a53cb2dc9353a87a9a4e3e778cd Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 12 May 2019 18:10:24 -0400 Subject: procfs: set ->user_ns before calling ->get_tree() here it's even simpler than in mqueue - pid_ns_prepare_proc() does everything needed anyway. Signed-off-by: Al Viro --- fs/proc/root.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'fs/proc') diff --git a/fs/proc/root.c b/fs/proc/root.c index 8b145e7b9661..74c2c6ab10bd 100644 --- a/fs/proc/root.c +++ b/fs/proc/root.c @@ -157,8 +157,6 @@ static int proc_get_tree(struct fs_context *fc) { struct proc_fs_context *ctx = fc->fs_private; - put_user_ns(fc->user_ns); - fc->user_ns = get_user_ns(ctx->pid_ns->user_ns); fc->s_fs_info = ctx->pid_ns; return vfs_get_super(fc, vfs_get_keyed_super, proc_fill_super); } @@ -167,8 +165,7 @@ static void proc_fs_context_free(struct fs_context *fc) { struct proc_fs_context *ctx = fc->fs_private; - if (ctx->pid_ns) - put_pid_ns(ctx->pid_ns); + put_pid_ns(ctx->pid_ns); kfree(ctx); } @@ -188,6 +185,8 @@ static int proc_init_fs_context(struct fs_context *fc) return -ENOMEM; ctx->pid_ns = get_pid_ns(task_active_pid_ns(current)); + put_user_ns(fc->user_ns); + fc->user_ns = get_user_ns(ctx->pid_ns->user_ns); fc->fs_private = ctx; fc->ops = &proc_fs_context_ops; return 0; -- cgit v1.2.3-55-g7522