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
|
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/StringView.h>
#include <Kernel/Process.h>
namespace Kernel {
KResultOr<int> Process::sys$pledge(Userspace<const Syscall::SC_pledge_params*> user_params)
{
Syscall::SC_pledge_params params;
if (!copy_from_user(¶ms, user_params))
return EFAULT;
if (params.promises.length > 1024 || params.execpromises.length > 1024)
return E2BIG;
String promises;
if (params.promises.characters) {
promises = copy_string_from_user(params.promises);
if (promises.is_null())
return EFAULT;
}
String execpromises;
if (params.execpromises.characters) {
execpromises = copy_string_from_user(params.execpromises);
if (execpromises.is_null())
return EFAULT;
}
auto parse_pledge = [&](auto& pledge_spec, u32& mask) {
auto parts = pledge_spec.split_view(' ');
for (auto& part : parts) {
#define __ENUMERATE_PLEDGE_PROMISE(x) \
if (part == #x) { \
mask |= (1u << (u32)Pledge::x); \
continue; \
}
ENUMERATE_PLEDGE_PROMISES
#undef __ENUMERATE_PLEDGE_PROMISE
return false;
}
return true;
};
ProtectedDataMutationScope scope { *this };
if (!promises.is_null()) {
u32 new_promises = 0;
if (!parse_pledge(promises, new_promises))
return EINVAL;
if (m_promises && (!new_promises || new_promises & ~m_promises))
return EPERM;
m_has_promises = true;
m_promises = new_promises;
}
if (!execpromises.is_null()) {
u32 new_execpromises = 0;
if (!parse_pledge(execpromises, new_execpromises))
return EINVAL;
if (m_execpromises && (!new_execpromises || new_execpromises & ~m_execpromises))
return EPERM;
m_has_execpromises = true;
m_execpromises = new_execpromises;
}
return 0;
}
}
|
