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-rw-r--r--fs/proc/array.c15
-rw-r--r--fs/proc/base.c93
-rw-r--r--fs/proc/inode.c4
-rw-r--r--fs/proc/proc_sysctl.c4
-rw-r--r--fs/proc/root.c2
5 files changed, 102 insertions, 16 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index f9bd395b3473..dc4c5a7b9ece 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -81,6 +81,7 @@
#include <linux/pid_namespace.h>
#include <linux/ptrace.h>
#include <linux/tracehook.h>
+#include <linux/user_namespace.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
@@ -161,6 +162,7 @@ static inline const char *get_task_state(struct task_struct *tsk)
static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *p)
{
+ struct user_namespace *user_ns = current_user_ns();
struct group_info *group_info;
int g;
struct fdtable *fdt = NULL;
@@ -189,8 +191,14 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
task_tgid_nr_ns(p, ns),
pid_nr_ns(pid, ns),
ppid, tpid,
- cred->uid, cred->euid, cred->suid, cred->fsuid,
- cred->gid, cred->egid, cred->sgid, cred->fsgid);
+ from_kuid_munged(user_ns, cred->uid),
+ from_kuid_munged(user_ns, cred->euid),
+ from_kuid_munged(user_ns, cred->suid),
+ from_kuid_munged(user_ns, cred->fsuid),
+ from_kgid_munged(user_ns, cred->gid),
+ from_kgid_munged(user_ns, cred->egid),
+ from_kgid_munged(user_ns, cred->sgid),
+ from_kgid_munged(user_ns, cred->fsgid));
task_lock(p);
if (p->files)
@@ -205,7 +213,8 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
task_unlock(p);
for (g = 0; g < min(group_info->ngroups, NGROUPS_SMALL); g++)
- seq_printf(m, "%d ", GROUP_AT(group_info, g));
+ seq_printf(m, "%d ",
+ from_kgid_munged(user_ns, GROUP_AT(group_info, g)));
put_cred(cred);
seq_putc(m, '\n');
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 57b8159f26f3..d2d3108a611c 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -81,6 +81,7 @@
#include <linux/oom.h>
#include <linux/elf.h>
#include <linux/pid_namespace.h>
+#include <linux/user_namespace.h>
#include <linux/fs_struct.h>
#include <linux/slab.h>
#include <linux/flex_array.h>
@@ -1561,8 +1562,8 @@ int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
generic_fillattr(inode, stat);
rcu_read_lock();
- stat->uid = 0;
- stat->gid = 0;
+ stat->uid = GLOBAL_ROOT_UID;
+ stat->gid = GLOBAL_ROOT_GID;
task = pid_task(proc_pid(inode), PIDTYPE_PID);
if (task) {
if (!has_pid_permissions(pid, task, 2)) {
@@ -1622,8 +1623,8 @@ int pid_revalidate(struct dentry *dentry, struct nameidata *nd)
inode->i_gid = cred->egid;
rcu_read_unlock();
} else {
- inode->i_uid = 0;
- inode->i_gid = 0;
+ inode->i_uid = GLOBAL_ROOT_UID;
+ inode->i_gid = GLOBAL_ROOT_GID;
}
inode->i_mode &= ~(S_ISUID | S_ISGID);
security_task_to_inode(task, inode);
@@ -1815,8 +1816,8 @@ static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd)
inode->i_gid = cred->egid;
rcu_read_unlock();
} else {
- inode->i_uid = 0;
- inode->i_gid = 0;
+ inode->i_uid = GLOBAL_ROOT_UID;
+ inode->i_gid = GLOBAL_ROOT_GID;
}
i_mode = S_IFLNK;
@@ -2045,8 +2046,8 @@ static int map_files_d_revalidate(struct dentry *dentry, struct nameidata *nd)
inode->i_gid = cred->egid;
rcu_read_unlock();
} else {
- inode->i_uid = 0;
- inode->i_gid = 0;
+ inode->i_uid = GLOBAL_ROOT_UID;
+ inode->i_gid = GLOBAL_ROOT_GID;
}
security_task_to_inode(task, inode);
status = 1;
@@ -2924,6 +2925,74 @@ static int proc_tgid_io_accounting(struct task_struct *task, char *buffer)
}
#endif /* CONFIG_TASK_IO_ACCOUNTING */
+#ifdef CONFIG_USER_NS
+static int proc_id_map_open(struct inode *inode, struct file *file,
+ struct seq_operations *seq_ops)
+{
+ struct user_namespace *ns = NULL;
+ struct task_struct *task;
+ struct seq_file *seq;
+ int ret = -EINVAL;
+
+ task = get_proc_task(inode);
+ if (task) {
+ rcu_read_lock();
+ ns = get_user_ns(task_cred_xxx(task, user_ns));
+ rcu_read_unlock();
+ put_task_struct(task);
+ }
+ if (!ns)
+ goto err;
+
+ ret = seq_open(file, seq_ops);
+ if (ret)
+ goto err_put_ns;
+
+ seq = file->private_data;
+ seq->private = ns;
+
+ return 0;
+err_put_ns:
+ put_user_ns(ns);
+err:
+ return ret;
+}
+
+static int proc_id_map_release(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq = file->private_data;
+ struct user_namespace *ns = seq->private;
+ put_user_ns(ns);
+ return seq_release(inode, file);
+}
+
+static int proc_uid_map_open(struct inode *inode, struct file *file)
+{
+ return proc_id_map_open(inode, file, &proc_uid_seq_operations);
+}
+
+static int proc_gid_map_open(struct inode *inode, struct file *file)
+{
+ return proc_id_map_open(inode, file, &proc_gid_seq_operations);
+}
+
+static const struct file_operations proc_uid_map_operations = {
+ .open = proc_uid_map_open,
+ .write = proc_uid_map_write,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = proc_id_map_release,
+};
+
+static const struct file_operations proc_gid_map_operations = {
+ .open = proc_gid_map_open,
+ .write = proc_gid_map_write,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = proc_id_map_release,
+};
+#endif /* CONFIG_USER_NS */
+
static int proc_pid_personality(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *task)
{
@@ -3026,6 +3095,10 @@ static const struct pid_entry tgid_base_stuff[] = {
#ifdef CONFIG_HARDWALL
INF("hardwall", S_IRUGO, proc_pid_hardwall),
#endif
+#ifdef CONFIG_USER_NS
+ REG("uid_map", S_IRUGO|S_IWUSR, proc_uid_map_operations),
+ REG("gid_map", S_IRUGO|S_IWUSR, proc_gid_map_operations),
+#endif
};
static int proc_tgid_base_readdir(struct file * filp,
@@ -3381,6 +3454,10 @@ static const struct pid_entry tid_base_stuff[] = {
#ifdef CONFIG_HARDWALL
INF("hardwall", S_IRUGO, proc_pid_hardwall),
#endif
+#ifdef CONFIG_USER_NS
+ REG("uid_map", S_IRUGO|S_IWUSR, proc_uid_map_operations),
+ REG("gid_map", S_IRUGO|S_IWUSR, proc_gid_map_operations),
+#endif
};
static int proc_tid_base_readdir(struct file * filp,
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 205c92280838..554ecc54799f 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -108,8 +108,8 @@ static int proc_show_options(struct seq_file *seq, struct dentry *root)
struct super_block *sb = root->d_sb;
struct pid_namespace *pid = sb->s_fs_info;
- if (pid->pid_gid)
- seq_printf(seq, ",gid=%lu", (unsigned long)pid->pid_gid);
+ if (!gid_eq(pid->pid_gid, GLOBAL_ROOT_GID))
+ seq_printf(seq, ",gid=%u", from_kgid_munged(&init_user_ns, pid->pid_gid));
if (pid->hide_pid != 0)
seq_printf(seq, ",hidepid=%u", pid->hide_pid);
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 21d836f40292..3476bca8f7af 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -371,9 +371,9 @@ void register_sysctl_root(struct ctl_table_root *root)
static int test_perm(int mode, int op)
{
- if (!current_euid())
+ if (uid_eq(current_euid(), GLOBAL_ROOT_UID))
mode >>= 6;
- else if (in_egroup_p(0))
+ else if (in_egroup_p(GLOBAL_ROOT_GID))
mode >>= 3;
if ((op & ~mode & (MAY_READ|MAY_WRITE|MAY_EXEC)) == 0)
return 0;
diff --git a/fs/proc/root.c b/fs/proc/root.c
index eed44bfc85db..7c30fce037c0 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -67,7 +67,7 @@ static int proc_parse_options(char *options, struct pid_namespace *pid)
case Opt_gid:
if (match_int(&args[0], &option))
return 0;
- pid->pid_gid = option;
+ pid->pid_gid = make_kgid(current_user_ns(), option);
break;
case Opt_hidepid:
if (match_int(&args[0], &option))
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-08 02:13:01 +0000