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Diffstat (limited to 'fs/proc/base.c')
-rw-r--r--fs/proc/base.c116
1 files changed, 92 insertions, 24 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 7e9f07bf260d..5ab1849971b4 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -140,9 +140,13 @@ struct pid_entry {
#define REG(NAME, MODE, fops) \
NOD(NAME, (S_IFREG|(MODE)), NULL, &fops, {})
#define ONE(NAME, MODE, show) \
- NOD(NAME, (S_IFREG|(MODE)), \
+ NOD(NAME, (S_IFREG|(MODE)), \
NULL, &proc_single_file_operations, \
{ .proc_show = show } )
+#define ATTR(LSM, NAME, MODE) \
+ NOD(NAME, (S_IFREG|(MODE)), \
+ NULL, &proc_pid_attr_operations, \
+ { .lsm = LSM })
/*
* Count the number of hardlinks for the pid_entry table, excluding the .
@@ -456,7 +460,7 @@ static int proc_pid_schedstat(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *task)
{
if (unlikely(!sched_info_on()))
- seq_printf(m, "0 0 0\n");
+ seq_puts(m, "0 0 0\n");
else
seq_printf(m, "%llu %llu %lu\n",
(unsigned long long)task->se.sum_exec_runtime,
@@ -530,7 +534,7 @@ static const struct file_operations proc_lstats_operations = {
static int proc_oom_score(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *task)
{
- unsigned long totalpages = totalram_pages + total_swap_pages;
+ unsigned long totalpages = totalram_pages() + total_swap_pages;
unsigned long points = 0;
points = oom_badness(task, NULL, NULL, totalpages) *
@@ -581,8 +585,10 @@ static int proc_pid_limits(struct seq_file *m, struct pid_namespace *ns,
/*
* print the file header
*/
- seq_printf(m, "%-25s %-20s %-20s %-10s\n",
- "Limit", "Soft Limit", "Hard Limit", "Units");
+ seq_puts(m, "Limit "
+ "Soft Limit "
+ "Hard Limit "
+ "Units \n");
for (i = 0; i < RLIM_NLIMITS; i++) {
if (rlim[i].rlim_cur == RLIM_INFINITY)
@@ -1084,10 +1090,6 @@ static int __set_oom_adj(struct file *file, int oom_adj, bool legacy)
task_lock(p);
if (!p->vfork_done && process_shares_mm(p, mm)) {
- pr_info("updating oom_score_adj for %d (%s) from %d to %d because it shares mm with %d (%s). Report if this is unexpected.\n",
- task_pid_nr(p), p->comm,
- p->signal->oom_score_adj, oom_adj,
- task_pid_nr(task), task->comm);
p->signal->oom_score_adj = oom_adj;
if (!legacy && has_capability_noaudit(current, CAP_SYS_RESOURCE))
p->signal->oom_score_adj_min = (short)oom_adj;
@@ -1208,7 +1210,7 @@ static const struct file_operations proc_oom_score_adj_operations = {
.llseek = default_llseek,
};
-#ifdef CONFIG_AUDITSYSCALL
+#ifdef CONFIG_AUDIT
#define TMPBUFLEN 11
static ssize_t proc_loginuid_read(struct file * file, char __user * buf,
size_t count, loff_t *ppos)
@@ -2356,10 +2358,13 @@ static ssize_t timerslack_ns_write(struct file *file, const char __user *buf,
return -ESRCH;
if (p != current) {
- if (!capable(CAP_SYS_NICE)) {
+ rcu_read_lock();
+ if (!ns_capable(__task_cred(p)->user_ns, CAP_SYS_NICE)) {
+ rcu_read_unlock();
count = -EPERM;
goto out;
}
+ rcu_read_unlock();
err = security_task_setscheduler(p);
if (err) {
@@ -2392,11 +2397,14 @@ static int timerslack_ns_show(struct seq_file *m, void *v)
return -ESRCH;
if (p != current) {
-
- if (!capable(CAP_SYS_NICE)) {
+ rcu_read_lock();
+ if (!ns_capable(__task_cred(p)->user_ns, CAP_SYS_NICE)) {
+ rcu_read_unlock();
err = -EPERM;
goto out;
}
+ rcu_read_unlock();
+
err = security_task_getscheduler(p);
if (err)
goto out;
@@ -2517,7 +2525,7 @@ static ssize_t proc_pid_attr_read(struct file * file, char __user * buf,
if (!task)
return -ESRCH;
- length = security_getprocattr(task,
+ length = security_getprocattr(task, PROC_I(inode)->op.lsm,
(char*)file->f_path.dentry->d_name.name,
&p);
put_task_struct(task);
@@ -2566,7 +2574,9 @@ static ssize_t proc_pid_attr_write(struct file * file, const char __user * buf,
if (rv < 0)
goto out_free;
- rv = security_setprocattr(file->f_path.dentry->d_name.name, page, count);
+ rv = security_setprocattr(PROC_I(inode)->op.lsm,
+ file->f_path.dentry->d_name.name, page,
+ count);
mutex_unlock(&current->signal->cred_guard_mutex);
out_free:
kfree(page);
@@ -2580,13 +2590,53 @@ static const struct file_operations proc_pid_attr_operations = {
.llseek = generic_file_llseek,
};
+#define LSM_DIR_OPS(LSM) \
+static int proc_##LSM##_attr_dir_iterate(struct file *filp, \
+ struct dir_context *ctx) \
+{ \
+ return proc_pident_readdir(filp, ctx, \
+ LSM##_attr_dir_stuff, \
+ ARRAY_SIZE(LSM##_attr_dir_stuff)); \
+} \
+\
+static const struct file_operations proc_##LSM##_attr_dir_ops = { \
+ .read = generic_read_dir, \
+ .iterate = proc_##LSM##_attr_dir_iterate, \
+ .llseek = default_llseek, \
+}; \
+\
+static struct dentry *proc_##LSM##_attr_dir_lookup(struct inode *dir, \
+ struct dentry *dentry, unsigned int flags) \
+{ \
+ return proc_pident_lookup(dir, dentry, \
+ LSM##_attr_dir_stuff, \
+ ARRAY_SIZE(LSM##_attr_dir_stuff)); \
+} \
+\
+static const struct inode_operations proc_##LSM##_attr_dir_inode_ops = { \
+ .lookup = proc_##LSM##_attr_dir_lookup, \
+ .getattr = pid_getattr, \
+ .setattr = proc_setattr, \
+}
+
+#ifdef CONFIG_SECURITY_SMACK
+static const struct pid_entry smack_attr_dir_stuff[] = {
+ ATTR("smack", "current", 0666),
+};
+LSM_DIR_OPS(smack);
+#endif
+
static const struct pid_entry attr_dir_stuff[] = {
- REG("current", S_IRUGO|S_IWUGO, proc_pid_attr_operations),
- REG("prev", S_IRUGO, proc_pid_attr_operations),
- REG("exec", S_IRUGO|S_IWUGO, proc_pid_attr_operations),
- REG("fscreate", S_IRUGO|S_IWUGO, proc_pid_attr_operations),
- REG("keycreate", S_IRUGO|S_IWUGO, proc_pid_attr_operations),
- REG("sockcreate", S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+ ATTR(NULL, "current", 0666),
+ ATTR(NULL, "prev", 0444),
+ ATTR(NULL, "exec", 0666),
+ ATTR(NULL, "fscreate", 0666),
+ ATTR(NULL, "keycreate", 0666),
+ ATTR(NULL, "sockcreate", 0666),
+#ifdef CONFIG_SECURITY_SMACK
+ DIR("smack", 0555,
+ proc_smack_attr_dir_inode_ops, proc_smack_attr_dir_ops),
+#endif
};
static int proc_attr_dir_readdir(struct file *file, struct dir_context *ctx)
@@ -2905,6 +2955,21 @@ static int proc_pid_patch_state(struct seq_file *m, struct pid_namespace *ns,
}
#endif /* CONFIG_LIVEPATCH */
+#ifdef CONFIG_STACKLEAK_METRICS
+static int proc_stack_depth(struct seq_file *m, struct pid_namespace *ns,
+ struct pid *pid, struct task_struct *task)
+{
+ unsigned long prev_depth = THREAD_SIZE -
+ (task->prev_lowest_stack & (THREAD_SIZE - 1));
+ unsigned long depth = THREAD_SIZE -
+ (task->lowest_stack & (THREAD_SIZE - 1));
+
+ seq_printf(m, "previous stack depth: %lu\nstack depth: %lu\n",
+ prev_depth, depth);
+ return 0;
+}
+#endif /* CONFIG_STACKLEAK_METRICS */
+
/*
* Thread groups
*/
@@ -2979,7 +3044,7 @@ static const struct pid_entry tgid_base_stuff[] = {
ONE("oom_score", S_IRUGO, proc_oom_score),
REG("oom_adj", S_IRUGO|S_IWUSR, proc_oom_adj_operations),
REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
-#ifdef CONFIG_AUDITSYSCALL
+#ifdef CONFIG_AUDIT
REG("loginuid", S_IWUSR|S_IRUGO, proc_loginuid_operations),
REG("sessionid", S_IRUGO, proc_sessionid_operations),
#endif
@@ -3006,6 +3071,9 @@ static const struct pid_entry tgid_base_stuff[] = {
#ifdef CONFIG_LIVEPATCH
ONE("patch_state", S_IRUSR, proc_pid_patch_state),
#endif
+#ifdef CONFIG_STACKLEAK_METRICS
+ ONE("stack_depth", S_IRUGO, proc_stack_depth),
+#endif
};
static int proc_tgid_base_readdir(struct file *file, struct dir_context *ctx)
@@ -3139,7 +3207,7 @@ static struct dentry *proc_pid_instantiate(struct dentry * dentry,
return d_splice_alias(inode, dentry);
}
-struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
+struct dentry *proc_pid_lookup(struct dentry *dentry, unsigned int flags)
{
struct task_struct *task;
unsigned tgid;
@@ -3364,7 +3432,7 @@ static const struct pid_entry tid_base_stuff[] = {
ONE("oom_score", S_IRUGO, proc_oom_score),
REG("oom_adj", S_IRUGO|S_IWUSR, proc_oom_adj_operations),
REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
-#ifdef CONFIG_AUDITSYSCALL
+#ifdef CONFIG_AUDIT
REG("loginuid", S_IWUSR|S_IRUGO, proc_loginuid_operations),
REG("sessionid", S_IRUGO, proc_sessionid_operations),
#endif
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