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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
# shmdt ______________________________________________________
#
# long sys_shmdt(char __user *shmaddr)
#
@define _SYSCALL_SHMDT_NAME
%(
name = "shmdt"
%)
@define _SYSCALL_SHMDT_ARGSTR
%(
argstr = sprintf("%p", shmaddr_uaddr)
%)
@define _SYSCALL_SHMDT_REGARGS
%(
shmaddr_uaddr = pointer_arg(1)
%)
@define _SYSCALL_SHMDT_REGARGS_STORE
%(
if (@probewrite(shmaddr_uaddr))
set_pointer_arg(1, shmaddr_uaddr)
%)
@define _SYSCALL_IPC_SHMDT_REGARGS
%(
shmaddr_uaddr = pointer_arg(5)
%)
@define _SYSCALL_IPC_SHMDT_REGARGS_STORE
%(
if (@probewrite(shmaddr_uaddr))
set_pointer_arg(5, shmaddr_uaddr)
%)
probe syscall.shmdt = dw_syscall.shmdt !, nd_syscall.shmdt ? {}
probe syscall.shmdt.return = dw_syscall.shmdt.return !,
nd_syscall.shmdt.return ? {}
# dw_shmdt _____________________________________________________
probe dw_syscall.shmdt = kernel.function("sys_shmdt").call ?
{
@_SYSCALL_SHMDT_NAME
shmaddr_uaddr = $shmaddr
@_SYSCALL_SHMDT_ARGSTR
}
probe dw_syscall.shmdt.return = kernel.function("sys_shmdt").return ?
{
@_SYSCALL_SHMDT_NAME
@SYSC_RETVALSTR($return)
}
# nd_shmdt _____________________________________________________
probe nd_syscall.shmdt = nd1_syscall.shmdt!, nd2_syscall.shmdt!, tp_syscall.shmdt
{ }
probe nd1_syscall.shmdt = kprobe.function("sys_shmdt") ?
{
@_SYSCALL_SHMDT_NAME
asmlinkage()
@_SYSCALL_SHMDT_REGARGS
@_SYSCALL_SHMDT_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.shmdt = __nd2_syscall.shmdt ?, __nd2_syscall.compat_ipc.shmdt ?
{
@_SYSCALL_SHMDT_NAME
@_SYSCALL_SHMDT_ARGSTR
}
probe __nd2_syscall.shmdt =
kprobe.function(@arch_syscall_prefix "sys_shmdt") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_SHMDT_REGARGS
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_SHMDT_REGARGS_STORE %)
}
probe __nd2_syscall.compat_ipc.shmdt =
kprobe.function(@arch_syscall_prefix "compat_sys_ipc") ?
{
__set_syscall_pt_regs(pointer_arg(1))
if (int_arg(1) != @const("SHMDT")) next;
@_SYSCALL_IPC_SHMDT_REGARGS
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_IPC_SHMDT_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.shmdt = __tp_syscall.shmdt, __tp_syscall.compat_ipc.shmdt
{
@_SYSCALL_SHMDT_NAME
@_SYSCALL_SHMDT_ARGSTR
}
probe __tp_syscall.shmdt = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_gate(@const("__NR_shmdt"))
@_SYSCALL_SHMDT_REGARGS
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_SHMDT_REGARGS_STORE %)
}
probe __tp_syscall.compat_ipc.shmdt = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_compat_ipc"))
if (int_arg(1) != @const("SHMDT")) next;
@_SYSCALL_IPC_SHMDT_REGARGS
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_IPC_SHMDT_REGARGS_STORE %)
}
probe nd_syscall.shmdt.return = nd1_syscall.shmdt.return!, nd2_syscall.shmdt.return!, tp_syscall.shmdt.return
{ }
probe nd1_syscall.shmdt.return = kprobe.function("sys_shmdt").return ?
{
@_SYSCALL_SHMDT_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.shmdt.return =
kprobe.function(@arch_syscall_prefix "sys_shmdt").return ?,
__nd2_syscall.compat_ipc.shmdt.return ?
{
@_SYSCALL_SHMDT_NAME
@SYSC_RETVALSTR(returnval())
}
probe __nd2_syscall.compat_ipc.shmdt.return =
kprobe.function(@arch_syscall_prefix "compat_sys_ipc").return ?
{
__set_syscall_pt_regs(@entry(pointer_arg(1)))
if (int_arg(1) != @const("SHMDT")) next;
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.shmdt.return = __tp_syscall.shmdt.return,
__tp_syscall.compat_ipc.shmdt.return
{
@_SYSCALL_SHMDT_NAME
@SYSC_RETVALSTR($ret)
}
probe __tp_syscall.shmdt.return = kernel.trace("sys_exit")
{
@__syscall_gate(@const("__NR_shmdt"))
}
probe __tp_syscall.compat_ipc.shmdt.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_compat_ipc"))
if (int_arg(1) != @const("SHMDT")) next;
}
|
