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# setresuid __________________________________________________
#
# long sys_setresuid(uid_t ruid, uid_t euid, uid_t suid)
#
@define _SYSCALL_SETRESUID_NAME
%(
name = "setresuid"
%)
@define _SYSCALL_SETRESUID_ARGSTR
%(
argstr = sprintf("%d, %d, %d", ruid, euid, suid)
%)
@define _SYSCALL_GATE
%(
%( arch == "x86_64" %?
// There are actually 3 x86_64 setresuid syscalls numbers (which
// get mapped to 2 syscall functions:
// - __NR_setresuid which gets mapped to sys_setresuid()
// - __NR_ia32_setresuid32 which also gets mapped to
// sys_setresuid()
// - __NR_ia32_setresuid which gets mapped to sys_setresuid16()
// (which is a wrapper around sys_setresuid())
// So, we need to avoid sys_setresuid() calls that come from
// sys_setresuid16().
@__syscall_compat_gate(@const("__NR_setresuid"),
@const("__NR_ia32_setresuid32"))
%:
%( arch == "i386" %?
// On i386, there are 2 setresuid syscall numbers:
// - __NR_setresuid which gets mapped to sys_setresuid16
// - __NR_setresuid32 which gets mapped to sys_setresuid
// Since this gets called from a probe on sys_setresuid, we'll
// make sure this is really __NR_setresuid32.
@__syscall_nr_gate(@const("__NR_setresuid32"))
%)
%)
%)
@define _SYSCALL_SETRESUID_REGARGS
%(
ruid = __int32(uint_arg(1))
euid = __int32(uint_arg(2))
suid = __int32(uint_arg(3))
%)
@define _SYSCALL_SETRESUID16_REGARGS
%(
ruid = __short(uint_arg(1))
euid = __short(uint_arg(2))
suid = __short(uint_arg(3))
%)
probe syscall.setresuid = dw_syscall.setresuid !, nd_syscall.setresuid ? {}
probe syscall.setresuid.return = dw_syscall.setresuid.return !,
nd_syscall.setresuid.return ? {}
# dw_setresuid _____________________________________________________
probe dw_syscall.setresuid = kernel.function("sys_setresuid").call
{
@_SYSCALL_GATE
@_SYSCALL_SETRESUID_NAME
ruid = __int32($ruid)
euid = __int32($euid)
suid = __int32($suid)
@_SYSCALL_SETRESUID_ARGSTR
}
probe dw_syscall.setresuid.return = kernel.function("sys_setresuid").return
{
@_SYSCALL_GATE
@_SYSCALL_SETRESUID_NAME
@SYSC_RETVALSTR($return)
}
# nd_setresuid _____________________________________________________
probe nd_syscall.setresuid = nd1_syscall.setresuid!, nd2_syscall.setresuid!, tp_syscall.setresuid
{ }
probe nd1_syscall.setresuid = kprobe.function("sys_setresuid") ?
{
@_SYSCALL_GATE
@_SYSCALL_SETRESUID_NAME
asmlinkage()
@_SYSCALL_SETRESUID_REGARGS
@_SYSCALL_SETRESUID_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.setresuid = kprobe.function(@arch_syscall_prefix "sys_setresuid") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_SETRESUID_NAME
@_SYSCALL_SETRESUID_REGARGS
@_SYSCALL_SETRESUID_ARGSTR
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.setresuid = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_setresuid"), @const("__NR_compat_setresuid32"))
@_SYSCALL_SETRESUID_NAME
@_SYSCALL_SETRESUID_REGARGS
@_SYSCALL_SETRESUID_ARGSTR
}
probe nd_syscall.setresuid.return = nd1_syscall.setresuid.return!, nd2_syscall.setresuid.return!, tp_syscall.setresuid.return
{ }
probe nd1_syscall.setresuid.return = kprobe.function("sys_setresuid").return ?
{
@_SYSCALL_GATE
@_SYSCALL_SETRESUID_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.setresuid.return = kprobe.function(@arch_syscall_prefix "sys_setresuid").return ?
{
@_SYSCALL_SETRESUID_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.setresuid.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_setresuid"), @const("__NR_compat_setresuid32"))
@_SYSCALL_SETRESUID_NAME
@SYSC_RETVALSTR($ret)
}
# setresuid16 ________________________________________________
#
# long sys_setresuid16(old_uid_t ruid, old_uid_t euid, old_uid_t suid)
#
probe syscall.setresuid16 = dw_syscall.setresuid16 !,
nd_syscall.setresuid16 ? {}
probe syscall.setresuid16.return = dw_syscall.setresuid16.return !,
nd_syscall.setresuid16.return ? {}
# dw_setresuid16 _____________________________________________________
probe dw_syscall.setresuid16 = kernel.function("sys_setresuid16").call ?
{
@_SYSCALL_SETRESUID_NAME
ruid = __short($ruid)
euid = __short($euid)
suid = __short($suid)
@_SYSCALL_SETRESUID_ARGSTR
}
probe dw_syscall.setresuid16.return = kernel.function("sys_setresuid16").return ?
{
@_SYSCALL_SETRESUID_NAME
@SYSC_RETVALSTR($return)
}
# nd_setresuid16 _____________________________________________________
probe nd_syscall.setresuid16 = nd1_syscall.setresuid16!, nd2_syscall.setresuid16!, tp_syscall.setresuid16
{ }
probe nd1_syscall.setresuid16 = kprobe.function("sys_setresuid16") ?
{
@_SYSCALL_SETRESUID_NAME
asmlinkage()
@_SYSCALL_SETRESUID16_REGARGS
@_SYSCALL_SETRESUID_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.setresuid16 = kprobe.function(@arch_syscall_prefix "sys_setresuid16") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_SETRESUID_NAME
@_SYSCALL_SETRESUID16_REGARGS
@_SYSCALL_SETRESUID_ARGSTR
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.setresuid16 = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_compat_setresuid"))
@_SYSCALL_SETRESUID_NAME
@_SYSCALL_SETRESUID16_REGARGS
@_SYSCALL_SETRESUID_ARGSTR
}
probe nd_syscall.setresuid16.return = nd1_syscall.setresuid16.return!, nd2_syscall.setresuid16.return!, tp_syscall.setresuid16.return
{ }
probe nd1_syscall.setresuid16.return = kprobe.function("sys_setresuid16").return ?
{
@_SYSCALL_SETRESUID_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.setresuid16.return =
kprobe.function(@arch_syscall_prefix "sys_setresuid16").return ?
{
@_SYSCALL_SETRESUID_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.setresuid16.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__compat_syscall_gate(@const("__NR_compat_setresuid"))
@_SYSCALL_SETRESUID_NAME
@SYSC_RETVALSTR($ret)
}
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