Commit 55299115 authored by Paul Chaignon's avatar Paul Chaignon

Tests for dereferences of pointers to external pointers

parent 471f1ea1
...@@ -383,6 +383,52 @@ int trace_entry(struct pt_regs *ctx, struct request *req) { ...@@ -383,6 +383,52 @@ int trace_entry(struct pt_regs *ctx, struct request *req) {
b = BPF(text=text) b = BPF(text=text)
fn = b.load_func("trace_entry", BPF.KPROBE) fn = b.load_func("trace_entry", BPF.KPROBE)
def test_probe_read_nested_deref(self):
text = """
#include <net/inet_sock.h>
int test(struct pt_regs *ctx, struct sock *sk) {
struct sock *ptr1;
struct sock **ptr2 = &ptr1;
*ptr2 = sk;
return ((struct sock *)(*ptr2))->sk_daddr;
}
"""
b = BPF(text=text)
fn = b.load_func("test", BPF.KPROBE)
def test_probe_read_nested_deref2(self):
text = """
#include <net/inet_sock.h>
int test(struct pt_regs *ctx, struct sock *sk) {
struct sock *ptr1;
struct sock **ptr2 = &ptr1;
struct sock ***ptr3 = &ptr2;
*ptr2 = sk;
*ptr3 = ptr2;
return ((struct sock *)(**ptr3))->sk_daddr;
}
"""
b = BPF(text=text)
fn = b.load_func("test", BPF.KPROBE)
def test_probe_read_nested_deref_func(self):
text = """
#include <net/inet_sock.h>
static int subtest(struct sock ***skp) {
return ((struct sock *)(**skp))->sk_daddr;
}
int test(struct pt_regs *ctx, struct sock *sk) {
struct sock *ptr1;
struct sock **ptr2 = &ptr1;
struct sock ***ptr3 = &ptr2;
*ptr2 = sk;
*ptr3 = ptr2;
return subtest(ptr3);
}
"""
b = BPF(text=text)
fn = b.load_func("test", BPF.KPROBE)
def test_paren_probe_read(self): def test_paren_probe_read(self):
text = """ text = """
#include <net/inet_sock.h> #include <net/inet_sock.h>
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment