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|
Disabled due to https://github.com/dynup/kpatch/issues/940
---
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 0ceb3b6..1b44c7f 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -370,12 +370,19 @@ static inline void task_seccomp(struct seq_file *m, struct task_struct *p)
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 --git a/kernel/exit.c b/kernel/exit.c
index deaa53a..01f5776 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -760,6 +760,7 @@ static void check_stack_usage(void)
static inline void check_stack_usage(void) {}
#endif
+#include <linux/livepatch.h>
void __noreturn do_exit(long code)
{
struct task_struct *tsk = current;
@@ -865,6 +866,8 @@ 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 --git a/kernel/fork.c b/kernel/fork.c
index 3311231..2c12c1a 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2093,6 +2093,7 @@ struct task_struct *fork_idle(int cpu)
* It copies the process, and if successful kick-starts
* it and waits for it to finish using the VM if required.
*/
+#include <linux/livepatch.h>
long _do_fork(unsigned long clone_flags,
unsigned long stack_start,
unsigned long stack_size,
@@ -2105,6 +2106,8 @@ long _do_fork(unsigned long clone_flags,
struct task_struct *p;
int trace = 0;
long nr;
+ int *newpid;
+ static int ctr = 0;
/*
* Determine whether and which event to report to ptracer. When
@@ -2131,6 +2134,11 @@ long _do_fork(unsigned long clone_flags,
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.
|
