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# setregid ___________________________________________________
# long sys_setregid(gid_t rgid, gid_t egid)
#
@define _SYSCALL_SETREGID_NAME
%(
name = "setregid"
%)
@define _SYSCALL_SETREGID_ARGSTR
%(
argstr = sprintf("%d, %d", rgid, egid)
%)
@define _SYSCALL_GATE
%(
%( arch == "x86_64" %?
// There are actually 3 x86_64 setregid syscalls numbers (which
// get mapped to 2 syscall functions:
// - __NR_setregid which gets mapped to sys_setregid()
// - __NR_ia32_setregid32 which also gets mapped to
// sys_setregid()
// - __NR_ia32_setregid which gets mapped to sys_setregid16()
// (which is a wrapper around sys_setregid())
// So, we need to avoid sys_setregid() calls that come from
// sys_setregid16().
@__syscall_compat_gate(@const("__NR_setregid"),
@const("__NR_ia32_setregid32"))
%:
%( arch == "i386" %?
// On i386, there are 2 setregid syscall numbers:
// - __NR_setregid which gets mapped to sys_setregid16
// - __NR_setregid32 which gets mapped to sys_setregid
// Since this gets called from a probe on sys_setregid, we'll
// make sure this is really __NR_setregid32.
@__syscall_nr_gate(@const("__NR_setregid32"))
%)
%)
%)
@define _SYSCALL_SETREGID_REGARGS
%(
rgid = __int32(uint_arg(1))
egid = __int32(uint_arg(2))
%)
@define _SYSCALL_SETREGID_REGARGS_STORE
%(
if (@probewrite(rgid))
set_uint_arg(1, __int32(rgid))
if (@probewrite(egid))
set_uint_arg(2, __int32(egid))
%)
@define _SYSCALL_SETREGID16_REGARGS
%(
rgid = __short(uint_arg(1))
egid = __short(uint_arg(2))
%)
@define _SYSCALL_SETREGID16_REGARGS_STORE
%(
if (@probewrite(rgid))
set_uint_arg(1, __short(rgid))
if (@probewrite(egid))
set_uint_arg(2, __short(egid))
%)
probe syscall.setregid = dw_syscall.setregid !, nd_syscall.setregid ? {}
probe syscall.setregid.return = dw_syscall.setregid.return !,
nd_syscall.setregid.return ? {}
# dw_setregid _____________________________________________________
probe dw_syscall.setregid = kernel.function("sys_setregid").call
{
@_SYSCALL_GATE
@_SYSCALL_SETREGID_NAME
rgid = __int32($rgid)
egid = __int32($egid)
@_SYSCALL_SETREGID_ARGSTR
}
probe dw_syscall.setregid.return = kernel.function("sys_setregid").return
{
@_SYSCALL_GATE
@_SYSCALL_SETREGID_NAME
@SYSC_RETVALSTR($return)
}
# nd_setregid _____________________________________________________
probe nd_syscall.setregid = nd1_syscall.setregid!, nd2_syscall.setregid!, tp_syscall.setregid
{ }
probe nd1_syscall.setregid = kprobe.function("sys_setregid") ?
{
@_SYSCALL_GATE
@_SYSCALL_SETREGID_NAME
asmlinkage()
@_SYSCALL_SETREGID_REGARGS
@_SYSCALL_SETREGID_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.setregid = kprobe.function(@arch_syscall_prefix "sys_setregid") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_SETREGID_NAME
@_SYSCALL_SETREGID_REGARGS
@_SYSCALL_SETREGID_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_SETREGID_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.setregid = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_setregid"), @const("__NR_compat_setregid32"))
@_SYSCALL_SETREGID_NAME
@_SYSCALL_SETREGID_REGARGS
@_SYSCALL_SETREGID_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_SETREGID_REGARGS_STORE %)
}
probe nd_syscall.setregid.return = nd1_syscall.setregid.return!, nd2_syscall.setregid.return!, tp_syscall.setregid.return
{ }
probe nd1_syscall.setregid.return = kprobe.function("sys_setregid").return ?
{
@_SYSCALL_GATE
@_SYSCALL_SETREGID_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.setregid.return = kprobe.function(@arch_syscall_prefix "sys_setregid").return ?
{
@_SYSCALL_SETREGID_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.setregid.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_setregid"), @const("__NR_compat_setregid32"))
@_SYSCALL_SETREGID_NAME
@SYSC_RETVALSTR($ret)
}
# setregid16 _________________________________________________
# long sys_setregid16(old_gid_t rgid, old_gid_t egid)
#
probe syscall.setregid16 = dw_syscall.setregid16 !, nd_syscall.setregid16 ? {}
probe syscall.setregid16.return = dw_syscall.setregid16.return !,
nd_syscall.setregid16.return ? {}
# dw_setregid16 _____________________________________________________
probe dw_syscall.setregid16 = kernel.function("sys_setregid16").call ?
{
@_SYSCALL_SETREGID_NAME
rgid = __short($rgid)
egid = __short($egid)
@_SYSCALL_SETREGID_ARGSTR
}
probe dw_syscall.setregid16.return = kernel.function("sys_setregid16").return ?
{
@_SYSCALL_SETREGID_NAME
@SYSC_RETVALSTR($return)
}
# nd_setregid16 _____________________________________________________
probe nd_syscall.setregid16 = nd1_syscall.setregid16!, nd2_syscall.setregid16!, tp_syscall.setregid16
{ }
probe nd1_syscall.setregid16 = kprobe.function("sys_setregid16") ?
{
@_SYSCALL_SETREGID_NAME
asmlinkage()
@_SYSCALL_SETREGID16_REGARGS
@_SYSCALL_SETREGID_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.setregid16 = kprobe.function(@arch_syscall_prefix "sys_setregid16") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_SETREGID_NAME
@_SYSCALL_SETREGID16_REGARGS
@_SYSCALL_SETREGID_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_SETREGID16_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.setregid16 = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_compat_setregid"))
@_SYSCALL_SETREGID_NAME
@_SYSCALL_SETREGID16_REGARGS
@_SYSCALL_SETREGID_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_SETREGID16_REGARGS_STORE %)
}
probe nd_syscall.setregid16.return = nd1_syscall.setregid16.return!, nd2_syscall.setregid16.return!, tp_syscall.setregid16.return
{ }
probe nd1_syscall.setregid16.return = kprobe.function("sys_setregid16").return ?
{
@_SYSCALL_SETREGID_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.setregid16.return = kprobe.function(@arch_syscall_prefix "sys_setregid16").return ?
{
@_SYSCALL_SETREGID_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.setregid16.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_compat_setregid"))
@_SYSCALL_SETREGID_NAME
@SYSC_RETVALSTR($ret)
}
|
