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# add_key ____________________________________________________
# long sys_add_key(const char __user *_type,
# const char __user *_description,
# const void __user *_payload,
# size_t plen,
# key_serial_t ringid)
#
@define _SYSCALL_ADD_KEY_NAME
%(
name = "add_key"
%)
@define _SYSCALL_ADD_KEY_ARGSTR
%(
argstr = sprintf("%s, %s, %s, %u, %d",
user_string_quoted(type_uaddr),
user_string_quoted(description_uaddr),
user_buffer_quoted(payload_uaddr, plen, syscall_string_trunc),
plen, ringid)
%)
@define _SYSCALL_ADD_KEY_REGARGS
%(
type_uaddr = pointer_arg(1)
description_uaddr = pointer_arg(2)
payload_uaddr = pointer_arg(3)
plen = ulong_arg(4)
ringid = int_arg(5)
%)
@define _SYSCALL_ADD_KEY_REGARGS_STORE
%(
if (@probewrite(type_uaddr))
set_pointer_arg(1, type_uaddr)
if (@probewrite(description_uaddr))
set_pointer_arg(2, description_uaddr)
if (@probewrite(payload_uaddr))
set_pointer_arg(3, payload_uaddr)
if (@probewrite(plen))
set_ulong_arg(4, plen)
if (@probewrite(ringid))
set_int_arg(5, ringid)
%)
probe syscall.add_key = dw_syscall.add_key !, nd_syscall.add_key ? {}
probe syscall.add_key.return = dw_syscall.add_key.return !, nd_syscall.add_key.return ? {}
# dw_add_key _____________________________________________________
probe dw_syscall.add_key = kernel.function("sys_add_key").call ?
{
@_SYSCALL_ADD_KEY_NAME
type_uaddr = $_type
description_uaddr = $_description
payload_uaddr = $_payload
plen = __ulong($plen)
ringid = __int32($ringid)
@_SYSCALL_ADD_KEY_ARGSTR
}
probe dw_syscall.add_key.return = kernel.function("sys_add_key").return ?
{
@_SYSCALL_ADD_KEY_NAME
@SYSC_RETVALSTR($return)
}
# nd_add_key _____________________________________________________
probe nd_syscall.add_key = nd1_syscall.add_key!, nd2_syscall.add_key!, tp_syscall.add_key
{ }
probe nd1_syscall.add_key = kprobe.function("sys_add_key") ?
{
@_SYSCALL_ADD_KEY_NAME
asmlinkage()
@_SYSCALL_ADD_KEY_REGARGS
@_SYSCALL_ADD_KEY_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.add_key = kprobe.function(@arch_syscall_prefix "sys_add_key") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_ADD_KEY_NAME
@_SYSCALL_ADD_KEY_REGARGS
@_SYSCALL_ADD_KEY_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_ADD_KEY_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.add_key = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_add_key"), @const("__NR_compat_add_key"))
@_SYSCALL_ADD_KEY_NAME
@_SYSCALL_ADD_KEY_REGARGS
@_SYSCALL_ADD_KEY_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_ADD_KEY_REGARGS_STORE %)
}
probe nd_syscall.add_key.return = nd1_syscall.add_key.return!, nd2_syscall.add_key.return!, tp_syscall.add_key.return
{ }
probe nd1_syscall.add_key.return = kprobe.function("sys_add_key").return ?
{
@_SYSCALL_ADD_KEY_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.add_key.return = kprobe.function(@arch_syscall_prefix "sys_add_key").return ?
{
@_SYSCALL_ADD_KEY_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.add_key.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_add_key"), @const("__NR_compat_add_key"))
@_SYSCALL_ADD_KEY_NAME
@SYSC_RETVALSTR($ret)
}
|
