diff options
Diffstat (limited to 'fs/proc/inode.c')
| -rw-r--r-- | fs/proc/inode.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/fs/proc/inode.c b/fs/proc/inode.c index 42305ddcbaa0..c1b72388e571 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -457,17 +457,30 @@ struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de) return inode; } -int proc_fill_super(struct super_block *s) +int proc_fill_super(struct super_block *s, void *data, int silent) { + struct pid_namespace *ns = get_pid_ns(s->s_fs_info); struct inode *root_inode; int ret; + if (!proc_parse_options(data, ns)) + return -EINVAL; + + /* User space would break if executables or devices appear on proc */ + s->s_iflags |= SB_I_USERNS_VISIBLE | SB_I_NOEXEC | SB_I_NODEV; s->s_flags |= MS_NODIRATIME | MS_NOSUID | MS_NOEXEC; s->s_blocksize = 1024; s->s_blocksize_bits = 10; s->s_magic = PROC_SUPER_MAGIC; s->s_op = &proc_sops; s->s_time_gran = 1; + + /* + * procfs isn't actually a stacking filesystem; however, there is + * too much magic going on inside it to permit stacking things on + * top of it + */ + s->s_stack_depth = FILESYSTEM_MAX_STACK_DEPTH; pde_get(&proc_root); root_inode = proc_get_inode(s, &proc_root); |