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fix: kvm instrumentation for CentOS >= 4.18.0-147
[lttng-modules.git]
/
probes
/
lttng-probe-user.c
diff --git
a/probes/lttng-probe-user.c
b/probes/lttng-probe-user.c
index e92107d94cfbd1948eb3773deb6c55a228f48505..ed566ddb424b123a02f8ec1ba496517801a7eb2d 100644
(file)
--- a/
probes/lttng-probe-user.c
+++ b/
probes/lttng-probe-user.c
@@
-20,6
+20,7
@@
#include <linux/uaccess.h>
#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/module.h>
+#include <wrapper/uaccess.h>
#include <probes/lttng-probe-user.h>
/*
#include <probes/lttng-probe-user.h>
/*
@@
-31,15
+32,19
@@
long lttng_strlen_user_inatomic(const char *addr)
{
long count = 0;
long lttng_strlen_user_inatomic(const char *addr)
{
long count = 0;
- mm_segment_t old_fs
= get_fs()
;
+ mm_segment_t old_fs;
+ if (!addr)
+ return 0;
+
+ old_fs = get_fs();
set_fs(KERNEL_DS);
pagefault_disable();
for (;;) {
char v;
unsigned long ret;
set_fs(KERNEL_DS);
pagefault_disable();
for (;;) {
char v;
unsigned long ret;
- if (unlikely(!access_ok(VERIFY_READ,
+ if (unlikely(!
lttng_
access_ok(VERIFY_READ,
(__force const char __user *) addr,
sizeof(v))))
break;
(__force const char __user *) addr,
sizeof(v))))
break;
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