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-rw-r--r--tapset/conversions.stp50
1 files changed, 33 insertions, 17 deletions
diff --git a/tapset/conversions.stp b/tapset/conversions.stp
index fdf00bd3..a218025b 100644
--- a/tapset/conversions.stp
+++ b/tapset/conversions.stp
@@ -1,5 +1,5 @@
// conversions tapset
-// Copyright (C) 2005-2008 Red Hat Inc.
+// Copyright (C) 2005-2009 Red Hat Inc.
// Copyright (C) 2007 Intel Corporation.
//
// This file is part of systemtap, and is free software. You can
@@ -79,15 +79,18 @@ deref_fault: /* branched to from kread() */
function user_string:string (addr:long) { return user_string2 (addr, "<unknown>") }
-function user_string2:string (addr:long, err_msg:string) %{ /* pure */
+function user_string2:string (addr:long, err_msg:string) %{ /* pure */ /* unprivileged */
+ assert_is_myproc();
if (_stp_strncpy_from_user (THIS->__retvalue,
(const char __user*) (uintptr_t) THIS->addr,
MAXSTRINGLEN) < 0)
strlcpy (THIS->__retvalue, THIS->err_msg, MAXSTRINGLEN);
%}
-function user_string_warn:string (addr:long) %{ /* pure */
- long rc = _stp_strncpy_from_user (THIS->__retvalue,
+function user_string_warn:string (addr:long) %{ /* pure */ /* unprivileged */
+ long rc;
+ assert_is_myproc();
+ rc = _stp_strncpy_from_user (THIS->__retvalue,
(const char __user*) (uintptr_t) THIS->addr, MAXSTRINGLEN);
if (rc < 0) {
// NB: using error_buffer to get local space for the warning, but we're
@@ -100,7 +103,8 @@ function user_string_warn:string (addr:long) %{ /* pure */
}
%}
-function user_string_quoted:string (addr:long) %{ /* pure */
+function user_string_quoted:string (addr:long) %{ /* pure */ /* unprivileged */
+ assert_is_myproc();
if (THIS->addr == 0)
strlcpy (THIS->__retvalue, "NULL", MAXSTRINGLEN);
else
@@ -113,8 +117,9 @@ function user_string_n:string (addr:long, n:long) {
return user_string_n2(addr, n, "<unknown>")
}
-function user_string_n2:string (addr:long, n:long, err_msg:string) %{ /* pure */
+function user_string_n2:string (addr:long, n:long, err_msg:string) %{ /* pure */ /* unprivileged */
long len = THIS->n + 1;
+ assert_is_myproc();
len = (len > MAXSTRINGLEN) ? MAXSTRINGLEN : len;
if (_stp_strncpy_from_user(THIS->__retvalue,
(char __user *) (uintptr_t) THIS->addr,
@@ -124,10 +129,11 @@ function user_string_n2:string (addr:long, n:long, err_msg:string) %{ /* pure */
THIS->__retvalue[len - 1] = '\0';
%}
-function user_string_n_warn:string (addr:long, n:long) %{ /* pure */
+function user_string_n_warn:string (addr:long, n:long) %{ /* pure */ /* unprivileged */
long len = THIS->n + 1;
long rc;
+ assert_is_myproc();
len = (len > MAXSTRINGLEN) ? MAXSTRINGLEN : len;
rc = _stp_strncpy_from_user(THIS->__retvalue,
(char __user *) (uintptr_t) THIS->addr, len);
@@ -143,8 +149,10 @@ function user_string_n_warn:string (addr:long, n:long) %{ /* pure */
THIS->__retvalue[len - 1] = '\0';
%}
-function user_string_n_quoted:string (addr:long, n:long) %{ /* pure */
- long len = THIS->n + 1;
+function user_string_n_quoted:string (addr:long, n:long) %{ /* pure */ /* unprivileged */
+ long len;
+ assert_is_myproc();
+ len = THIS->n + 1;
if (THIS->addr == 0)
strlcpy(THIS->__retvalue, "NULL", MAXSTRINGLEN);
else
@@ -155,7 +163,8 @@ function user_string_n_quoted:string (addr:long, n:long) %{ /* pure */
// When userspace data is not accessible, the following functions return 0
-function user_short:long (addr:long) %{ /* pure */
+function user_short:long (addr:long) %{ /* pure */ /* unprivileged */
+ assert_is_myproc();
if (!access_ok(VERIFY_READ, (short *) (intptr_t) THIS->addr, sizeof(short)))
goto fault;
if (__stp_get_user(THIS->__retvalue, (short *) (intptr_t) THIS->addr)) {
@@ -164,7 +173,8 @@ fault:
}
%}
-function user_short_warn:long (addr:long) %{ /* pure */
+function user_short_warn:long (addr:long) %{ /* pure */ /* unprivileged */
+ assert_is_myproc();
if (!access_ok(VERIFY_READ, (short *) (intptr_t) THIS->addr, sizeof(short)))
goto fault;
if (__stp_get_user(THIS->__retvalue, (short *) (intptr_t) THIS->addr)) {
@@ -176,7 +186,8 @@ fault:
}
%}
-function user_int:long (addr:long) %{ /* pure */
+function user_int:long (addr:long) %{ /* pure */ /* unprivileged */
+ assert_is_myproc();
if (!access_ok(VERIFY_READ, (int *) (intptr_t) THIS->addr, sizeof(int)))
goto fault;
if (__stp_get_user(THIS->__retvalue, (int *) (intptr_t) THIS->addr)) {
@@ -185,7 +196,8 @@ fault:
}
%}
-function user_int_warn:long (addr:long) %{ /* pure */
+function user_int_warn:long (addr:long) %{ /* pure */ /* unprivileged */
+ assert_is_myproc();
if (!access_ok(VERIFY_READ, (int *) (intptr_t) THIS->addr, sizeof(int)))
goto fault;
if (__stp_get_user(THIS->__retvalue, (int *) (intptr_t) THIS->addr)) {
@@ -197,7 +209,8 @@ fault:
}
%}
-function user_long:long (addr:long) %{ /* pure */
+function user_long:long (addr:long) %{ /* pure */ /* unprivileged */
+ assert_is_myproc();
if (!access_ok(VERIFY_READ, (long *) (intptr_t) THIS->addr, sizeof(long)))
goto fault;
if (__stp_get_user(THIS->__retvalue, (long *) (intptr_t) THIS->addr)) {
@@ -206,7 +219,8 @@ fault:
}
%}
-function user_long_warn:long (addr:long) %{ /* pure */
+function user_long_warn:long (addr:long) %{ /* pure */ /* unprivileged */
+ assert_is_myproc();
if (!access_ok(VERIFY_READ, (long *) (intptr_t) THIS->addr, sizeof(long)))
goto fault;
if (__stp_get_user(THIS->__retvalue, (long *) (intptr_t) THIS->addr)) {
@@ -218,7 +232,8 @@ fault:
}
%}
-function user_char:long (addr:long) %{ /* pure */
+function user_char:long (addr:long) %{ /* pure */ /* unprivileged */
+ assert_is_myproc();
if (!access_ok(VERIFY_READ, (char *) (intptr_t) THIS->addr, sizeof(char)))
goto fault;
if (__stp_get_user(THIS->__retvalue, (char *) (intptr_t) THIS->addr)) {
@@ -227,7 +242,8 @@ fault:
}
%}
-function user_char_warn:long (addr:long) %{ /* pure */
+function user_char_warn:long (addr:long) %{ /* pure */ /* unprivileged */
+ assert_is_myproc();
if (!access_ok(VERIFY_READ, (char *) (intptr_t) THIS->addr, sizeof(char)))
goto fault;
if (__stp_get_user(THIS->__retvalue, (char *) (intptr_t) THIS->addr)) {
generated by cgit (git 2.34.1) at 2025-08-04 23:21:19 +0000