mirror of https://github.com/dynup/kpatch
70 lines
2.1 KiB
Diff
70 lines
2.1 KiB
Diff
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diff -Nupr src.orig/fs/proc/array.c src/fs/proc/array.c
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--- src.orig/fs/proc/array.c 2020-09-03 11:48:30.496726119 -0400
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+++ src/fs/proc/array.c 2020-09-03 11:49:11.696855012 -0400
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@@ -395,13 +395,20 @@ static inline void task_seccomp(struct s
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seq_putc(m, '\n');
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}
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+#include <linux/livepatch.h>
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static inline void task_context_switch_counts(struct seq_file *m,
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struct task_struct *p)
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{
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+ int *newpid;
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+
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seq_printf(m, "voluntary_ctxt_switches:\t%lu\n"
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"nonvoluntary_ctxt_switches:\t%lu\n",
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p->nvcsw,
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p->nivcsw);
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+
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+ newpid = klp_shadow_get(p, 0);
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+ if (newpid)
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+ seq_printf(m, "newpid:\t%d\n", *newpid);
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}
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static void task_cpus_allowed(struct seq_file *m, struct task_struct *task)
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diff -Nupr src.orig/kernel/exit.c src/kernel/exit.c
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--- src.orig/kernel/exit.c 2020-09-03 11:48:30.717726811 -0400
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+++ src/kernel/exit.c 2020-09-03 11:49:11.696855012 -0400
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@@ -791,6 +791,7 @@ static void check_stack_usage(void)
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static inline void check_stack_usage(void) {}
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#endif
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+#include <linux/livepatch.h>
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void do_exit(long code)
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{
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struct task_struct *tsk = current;
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@@ -888,6 +889,8 @@ void do_exit(long code)
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check_stack_usage();
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exit_thread();
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+ klp_shadow_free(tsk, 0, NULL);
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+
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/*
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* Flush inherited counters to the parent - before the parent
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* gets woken up by child-exit notifications.
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diff -Nupr src.orig/kernel/fork.c src/kernel/fork.c
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--- src.orig/kernel/fork.c 2020-09-03 11:48:30.717726811 -0400
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+++ src/kernel/fork.c 2020-09-03 11:49:11.697855015 -0400
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@@ -1784,6 +1784,7 @@ struct task_struct *fork_idle(int cpu)
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* It copies the process, and if successful kick-starts
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* it and waits for it to finish using the VM if required.
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*/
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+#include <linux/livepatch.h>
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long do_fork(unsigned long clone_flags,
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unsigned long stack_start,
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unsigned long stack_size,
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@@ -1821,6 +1822,13 @@ long do_fork(unsigned long clone_flags,
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if (!IS_ERR(p)) {
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struct completion vfork;
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struct pid *pid;
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+ int *newpid;
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+ static int ctr = 0;
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+
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+ newpid = klp_shadow_get_or_alloc(p, 0, sizeof(*newpid), GFP_KERNEL,
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+ NULL, NULL);
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+ if (newpid)
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+ *newpid = ctr++;
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trace_sched_process_fork(current, p);
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