1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
//===-- sanitizer_common_interceptors_netbsd_compat.inc ---------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Common function interceptors for tools like AddressSanitizer,
// ThreadSanitizer, MemorySanitizer, etc.
//
// Interceptors for NetBSD old function calls that have been versioned.
//
// NetBSD minimal version supported 9.0.
// NetBSD current version supported 9.99.26.
//
//===----------------------------------------------------------------------===//
#if SANITIZER_NETBSD
// First undef all mangled symbols.
// Next, define compat interceptors.
// Finally, undef INIT_ and redefine it.
// This allows to avoid preprocessor issues.
#undef fstatvfs
#undef fstatvfs1
#undef getmntinfo
#undef getvfsstat
#undef statvfs
#undef statvfs1
INTERCEPTOR(int, statvfs, char *path, void *buf) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, statvfs, path, buf);
if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
// FIXME: under ASan the call below may write to freed memory and corrupt
// its metadata. See
// https://github.com/google/sanitizers/issues/321.
int res = REAL(statvfs)(path, buf);
if (!res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statvfs90_sz);
return res;
}
INTERCEPTOR(int, fstatvfs, int fd, void *buf) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, fstatvfs, fd, buf);
COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
// FIXME: under ASan the call below may write to freed memory and corrupt
// its metadata. See
// https://github.com/google/sanitizers/issues/321.
int res = REAL(fstatvfs)(fd, buf);
if (!res) {
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statvfs90_sz);
if (fd >= 0)
COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd);
}
return res;
}
#undef INIT_STATVFS
#define INIT_STATVFS \
COMMON_INTERCEPT_FUNCTION(statvfs); \
COMMON_INTERCEPT_FUNCTION(fstatvfs); \
COMMON_INTERCEPT_FUNCTION(__statvfs90); \
COMMON_INTERCEPT_FUNCTION(__fstatvfs90)
INTERCEPTOR(int, __getmntinfo13, void **mntbufp, int flags) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, __getmntinfo13, mntbufp, flags);
int cnt = REAL(__getmntinfo13)(mntbufp, flags);
if (cnt > 0 && mntbufp) {
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, mntbufp, sizeof(void *));
if (*mntbufp)
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *mntbufp, cnt * struct_statvfs90_sz);
}
return cnt;
}
#undef INIT_GETMNTINFO
#define INIT_GETMNTINFO \
COMMON_INTERCEPT_FUNCTION(__getmntinfo13); \
COMMON_INTERCEPT_FUNCTION(__getmntinfo90)
INTERCEPTOR(int, getvfsstat, void *buf, SIZE_T bufsize, int flags) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, getvfsstat, buf, bufsize, flags);
int ret = REAL(getvfsstat)(buf, bufsize, flags);
if (buf && ret > 0)
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, ret * struct_statvfs90_sz);
return ret;
}
#undef INIT_GETVFSSTAT
#define INIT_GETVFSSTAT \
COMMON_INTERCEPT_FUNCTION(getvfsstat); \
COMMON_INTERCEPT_FUNCTION(__getvfsstat90)
INTERCEPTOR(int, statvfs1, const char *path, void *buf, int flags) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, statvfs1, path, buf, flags);
if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, internal_strlen(path) + 1);
int res = REAL(statvfs1)(path, buf, flags);
if (!res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statvfs90_sz);
return res;
}
INTERCEPTOR(int, fstatvfs1, int fd, void *buf, int flags) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, fstatvfs1, fd, buf, flags);
COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
int res = REAL(fstatvfs1)(fd, buf, flags);
if (!res) {
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statvfs90_sz);
if (fd >= 0)
COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd);
}
return res;
}
#undef INIT_STATVFS1
#define INIT_STATVFS1 \
COMMON_INTERCEPT_FUNCTION(statvfs1); \
COMMON_INTERCEPT_FUNCTION(fstatvfs1); \
COMMON_INTERCEPT_FUNCTION(__statvfs190); \
COMMON_INTERCEPT_FUNCTION(__fstatvfs190)
#endif
|
