1 files changed, 30 insertions, 18 deletions

diff --git a/fs/proc/array.c b/fs/proc/array.c
index bb1d3619ca12..004077f1a7bf 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -85,6 +85,7 @@
 #include <linux/delayacct.h>
 #include <linux/seq_file.h>
 #include <linux/pid_namespace.h>
+#include <linux/prctl.h>
 #include <linux/ptrace.h>
 #include <linux/tracehook.h>
 #include <linux/string_helpers.h>
@@ -342,6 +343,30 @@ static inline void task_seccomp(struct seq_file *m, struct task_struct *p)
 #ifdef CONFIG_SECCOMP
         seq_put_decimal_ull(m, "\nSeccomp:\t", p->seccomp.mode);
 #endif
+        seq_printf(m, "\nSpeculation_Store_Bypass:\t");
+        switch (arch_prctl_spec_ctrl_get(p, PR_SPEC_STORE_BYPASS)) {
+        case -EINVAL:
+                seq_printf(m, "unknown");
+                break;
+        case PR_SPEC_NOT_AFFECTED:
+                seq_printf(m, "not vulnerable");
+                break;
+        case PR_SPEC_PRCTL | PR_SPEC_FORCE_DISABLE:
+                seq_printf(m, "thread force mitigated");
+                break;
+        case PR_SPEC_PRCTL | PR_SPEC_DISABLE:
+                seq_printf(m, "thread mitigated");
+                break;
+        case PR_SPEC_PRCTL | PR_SPEC_ENABLE:
+                seq_printf(m, "thread vulnerable");
+                break;
+        case PR_SPEC_DISABLE:
+                seq_printf(m, "globally mitigated");
+                break;
+        default:
+                seq_printf(m, "vulnerable");
+                break;
+        }
         seq_putc(m, '\n');
 }
 
@@ -684,25 +709,22 @@ out:
 
 static int children_seq_show(struct seq_file *seq, void *v)
 {
-        struct inode *inode = seq->private;
-        pid_t pid;
-
-        pid = pid_nr_ns(v, inode->i_sb->s_fs_info);
-        seq_printf(seq, "%d ", pid);
+        struct inode *inode = file_inode(seq->file);
 
+        seq_printf(seq, "%d ", pid_nr_ns(v, proc_pid_ns(inode)));
         return 0;
 }
 
 static void *children_seq_start(struct seq_file *seq, loff_t *pos)
 {
-        return get_children_pid(seq->private, NULL, *pos);
+        return get_children_pid(file_inode(seq->file), NULL, *pos);
 }
 
 static void *children_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 {
         struct pid *pid;
 
-        pid = get_children_pid(seq->private, v, *pos + 1);
+        pid = get_children_pid(file_inode(seq->file), v, *pos + 1);
         put_pid(v);
 
         ++*pos;
@@ -723,17 +745,7 @@ static const struct seq_operations children_seq_ops = {
 
 static int children_seq_open(struct inode *inode, struct file *file)
 {
-        struct seq_file *m;
-        int ret;
-
-        ret = seq_open(file, &children_seq_ops);
-        if (ret)
-                return ret;
-
-        m = file->private_data;
-        m->private = inode;
-
-        return ret;
+        return seq_open(file, &children_seq_ops);
 }
 
 const struct file_operations proc_tid_children_operations = {