diff options
Diffstat (limited to 'fs/proc/root.c')
| -rw-r--r-- | fs/proc/root.c | 25 |
1 files changed, 12 insertions, 13 deletions
diff --git a/fs/proc/root.c b/fs/proc/root.c index c6e9fac26ba..229e366598d 100644 --- a/fs/proc/root.c +++ b/fs/proc/root.c @@ -16,6 +16,7 @@ #include <linux/sched.h> #include <linux/module.h> #include <linux/bitops.h> +#include <linux/user_namespace.h> #include <linux/mount.h> #include <linux/pid_namespace.h> #include <linux/parser.h> @@ -108,6 +109,9 @@ static struct dentry *proc_mount(struct file_system_type *fs_type, } else { ns = task_active_pid_ns(current); options = data; + + if (!current_user_ns()->may_mount_proc) + return ERR_PTR(-EPERM); } sb = sget(fs_type, proc_test_super, proc_set_super, flags, ns); @@ -137,6 +141,8 @@ static void proc_kill_sb(struct super_block *sb) struct pid_namespace *ns; ns = (struct pid_namespace *)sb->s_fs_info; + if (ns->proc_self) + dput(ns->proc_self); kill_anon_super(sb); put_pid_ns(ns); } @@ -196,21 +202,14 @@ static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * dentr return proc_pid_lookup(dir, dentry, flags); } -static int proc_root_readdir(struct file * filp, - void * dirent, filldir_t filldir) +static int proc_root_readdir(struct file *file, struct dir_context *ctx) { - unsigned int nr = filp->f_pos; - int ret; - - if (nr < FIRST_PROCESS_ENTRY) { - int error = proc_readdir(filp, dirent, filldir); - if (error <= 0) - return error; - filp->f_pos = FIRST_PROCESS_ENTRY; + if (ctx->pos < FIRST_PROCESS_ENTRY) { + proc_readdir(file, ctx); + ctx->pos = FIRST_PROCESS_ENTRY; } - ret = proc_pid_readdir(filp, dirent, filldir); - return ret; + return proc_pid_readdir(file, ctx); } /* @@ -220,7 +219,7 @@ static int proc_root_readdir(struct file * filp, */ static const struct file_operations proc_root_operations = { .read = generic_read_dir, - .readdir = proc_root_readdir, + .iterate = proc_root_readdir, .llseek = default_llseek, }; |