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diff -Nupr src.orig/fs/proc/array.c src/fs/proc/array.c
--- src.orig/fs/proc/array.c 2023-01-12 11:20:07.182710551 -0500
+++ src/fs/proc/array.c 2023-01-12 11:21:10.821087869 -0500
@@ -397,12 +397,19 @@ static inline void task_seccomp(struct s
seq_putc(m, '\n');
}
+#include <linux/livepatch.h>
static inline void task_context_switch_counts(struct seq_file *m,
struct task_struct *p)
{
+ int *newpid;
+
seq_put_decimal_ull(m, "voluntary_ctxt_switches:\t", p->nvcsw);
seq_put_decimal_ull(m, "\nnonvoluntary_ctxt_switches:\t", p->nivcsw);
seq_putc(m, '\n');
+
+ newpid = klp_shadow_get(p, 0);
+ if (newpid)
+ seq_printf(m, "newpid:\t%d\n", *newpid);
}
static void task_cpus_allowed(struct seq_file *m, struct task_struct *task)
diff -Nupr src.orig/kernel/exit.c src/kernel/exit.c
--- src.orig/kernel/exit.c 2023-01-12 11:20:05.408700033 -0500
+++ src/kernel/exit.c 2023-01-12 11:21:10.822087875 -0500
@@ -802,6 +802,7 @@ static void synchronize_group_exit(struc
spin_unlock_irq(&sighand->siglock);
}
+#include <linux/livepatch.h>
void __noreturn do_exit(long code)
{
struct task_struct *tsk = current;
@@ -867,6 +868,8 @@ void __noreturn do_exit(long code)
exit_task_work(tsk);
exit_thread(tsk);
+ klp_shadow_free(tsk, 0, NULL);
+
/*
* Flush inherited counters to the parent - before the parent
* gets woken up by child-exit notifications.
diff -Nupr src.orig/kernel/fork.c src/kernel/fork.c
--- src.orig/kernel/fork.c 2023-01-12 11:20:05.408700033 -0500
+++ src/kernel/fork.c 2023-01-12 11:21:10.824087886 -0500
@@ -2637,6 +2637,7 @@ struct task_struct *create_io_thread(int
*
* args->exit_signal is expected to be checked for sanity by the caller.
*/
+#include <linux/livepatch.h>
pid_t kernel_clone(struct kernel_clone_args *args)
{
u64 clone_flags = args->flags;
@@ -2645,6 +2646,8 @@ pid_t kernel_clone(struct kernel_clone_a
struct task_struct *p;
int trace = 0;
pid_t nr;
+ int *newpid;
+ static int ctr = 0;
/*
* For legacy clone() calls, CLONE_PIDFD uses the parent_tid argument
@@ -2684,6 +2687,11 @@ pid_t kernel_clone(struct kernel_clone_a
if (IS_ERR(p))
return PTR_ERR(p);
+ newpid = klp_shadow_get_or_alloc(p, 0, sizeof(*newpid), GFP_KERNEL,
+ NULL, NULL);
+ if (newpid)
+ *newpid = ctr++;
+
/*
* Do this prior waking up the new thread - the thread pointer
* might get invalid after that point, if the thread exits quickly.
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