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|
# chown ______________________________________________________
# long sys_chown(const char __user * filename, uid_t user, gid_t group)
@define _SYSCALL_CHOWN_NAME
%(
name = "chown"
%)
@define _SYSCALL_CHOWN_ARGSTR
%(
argstr = sprintf("%s, %d, %d", path, owner, group)
%)
@define _SYSCALL_CHOWN_REGARGS
%(
path = user_string_quoted(pointer_arg(1))
path_unquoted = user_string_nofault(pointer_arg(1))
owner = __int32(uint_arg(2))
group = __int32(uint_arg(3))
%)
@define _SYSCALL_CHOWN_REGARGS_STORE
%(
if (@probewrite(path_unquoted))
set_user_string_arg(pointer_arg(1), path_unquoted)
if (@probewrite(owner))
set_uint_arg(2, __int32(owner))
if (@probewrite(group))
set_uint_arg(3, __int32(group))
%)
probe syscall.chown = dw_syscall.chown !, nd_syscall.chown ? {}
probe syscall.chown.return = dw_syscall.chown.return !, nd_syscall.chown.return ? {}
# dw_chown _____________________________________________________
probe dw_syscall.chown = kernel.function("sys_chown").call
{
// Avoid chown16() calling chown().
%( arch == "x86_64" %?
@__syscall_compat_gate(@const("__NR_chown"), @const("__NR_ia32_chown32"))
%)
%( arch == "i386" %?
@__syscall_gate(@const("__NR_chown32"))
%)
@_SYSCALL_CHOWN_NAME
path = user_string_quoted($filename)
owner = __int32($user)
group = __int32($group)
@_SYSCALL_CHOWN_ARGSTR
}
probe dw_syscall.chown.return = kernel.function("sys_chown").return
{
%( arch == "x86_64" %?
@__syscall_compat_gate(@const("__NR_chown"), @const("__NR_ia32_chown32"))
%)
%( arch == "i386" %?
@__syscall_gate(@const("__NR_chown32"))
%)
@_SYSCALL_CHOWN_NAME
@SYSC_RETVALSTR($return)
}
# nd_chown _____________________________________________________
probe nd_syscall.chown = nd1_syscall.chown!, nd2_syscall.chown!, tp_syscall.chown
{ }
probe nd1_syscall.chown = kprobe.function("sys_chown") ?
{
// Avoid chown16() calling chown().
%( arch == "x86_64" %?
@__syscall_compat_gate(@const("__NR_chown"), @const("__NR_ia32_chown32"))
%)
%( arch == "i386" %?
@__syscall_gate(@const("__NR_chown32"))
%)
@_SYSCALL_CHOWN_NAME
asmlinkage()
@_SYSCALL_CHOWN_REGARGS
@_SYSCALL_CHOWN_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.chown = kprobe.function(@arch_syscall_prefix "sys_chown") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_CHOWN_NAME
@_SYSCALL_CHOWN_REGARGS
@_SYSCALL_CHOWN_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_CHOWN_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.chown = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
%( CONFIG_64BIT == "y" %?
@__syscall_compat_gate(@const("__NR_chown"), @const("__NR_compat_chown32"))
%:
@__syscall_gate(@const("__NR_chown32"))
%)
@_SYSCALL_CHOWN_NAME
@_SYSCALL_CHOWN_REGARGS
@_SYSCALL_CHOWN_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_CHOWN_REGARGS_STORE %)
}
probe nd_syscall.chown.return = nd1_syscall.chown.return!, nd2_syscall.chown.return!, tp_syscall.chown.return
{ }
probe nd1_syscall.chown.return = kprobe.function("sys_chown").return ?
{
%( arch == "x86_64" %?
@__syscall_compat_gate(@const("__NR_chown"), @const("__NR_ia32_chown32"))
%)
%( arch == "i386" %?
@__syscall_gate(@const("__NR_chown32"))
%)
@_SYSCALL_CHOWN_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.chown.return = kprobe.function(@arch_syscall_prefix "sys_chown").return ?
{
@_SYSCALL_CHOWN_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.chown.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
%( CONFIG_64BIT == "y" %?
@__syscall_compat_gate(@const("__NR_chown"), @const("__NR_compat_chown32"))
%:
@__syscall_gate(@const("__NR_chown32"))
%)
@_SYSCALL_CHOWN_NAME
@SYSC_RETVALSTR($ret)
}
|
