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proccontrol(1): Add wxmap control

Browse source 
Reviewed by:	brooks, emaste, markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D31779
This commit is contained in:
Konstantin Belousov 2021-09-02 02:27:58 +03:00
parent 796a8e1ad1
commit ac8af19380
2 changed files with 26 additions and 2 deletions
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4
usr.bin/proccontrol/proccontrol.1
View file

@ -28,7 +28,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd July 2, 2021
.Dd September 2, 2021
.Dt PROCCONTROL 1
.Os
.Sh NAME
@ -72,6 +72,8 @@ Controls the implicit PROT_MAX application for
.It Ar nonewprivs
Controls disabling the setuid and sgid bits for
.Xr execve 2 .
.It Ar wxmap
Controls the write exclusive execute mode for mappings.
.It Ar kpti
Controls the KPTI enable, AMD64 only.
.It Ar la48

24
usr.bin/proccontrol/proccontrol.c
View file

@ -46,6 +46,7 @@ enum {
MODE_PROTMAX,
MODE_STACKGAP,
MODE_NO_NEW_PRIVS,
MODE_WXMAP,
#ifdef PROC_KPTI_CTL
MODE_KPTI,
#endif
@ -85,7 +86,7 @@ usage(void)
{
fprintf(stderr, "Usage: proccontrol -m (aslr|protmax|trace|trapcap|"
"stackgap|nonewprivs"KPTI_USAGE LA_USAGE") [-q] "
"stackgap|nonewprivs|wxmap"KPTI_USAGE LA_USAGE") [-q] "
"[-s (enable|disable)] [-p pid | command]\n");
exit(1);
}
@ -116,6 +117,8 @@ main(int argc, char *argv[])
mode = MODE_STACKGAP;
else if (strcmp(optarg, "nonewprivs") == 0)
mode = MODE_NO_NEW_PRIVS;
else if (strcmp(optarg, "wxmap") == 0)
mode = MODE_WXMAP;
#ifdef PROC_KPTI_CTL
else if (strcmp(optarg, "kpti") == 0)
mode = MODE_KPTI;
@ -181,6 +184,9 @@ main(int argc, char *argv[])
error = procctl(P_PID, pid, PROC_NO_NEW_PRIVS_STATUS,
&arg);
break;
case MODE_WXMAP:
error = procctl(P_PID, pid, PROC_WXMAP_STATUS, &arg);
break;
#ifdef PROC_KPTI_CTL
case MODE_KPTI:
error = procctl(P_PID, pid, PROC_KPTI_STATUS, &arg);
@ -281,6 +287,17 @@ main(int argc, char *argv[])
break;
}
break;
case MODE_WXMAP:
if ((arg & PROC_WX_MAPPINGS_PERMIT) != 0)
printf("enabled");
else
printf("disabled");
if ((arg & PROC_WX_MAPPINGS_DISALLOW_EXEC) != 0)
printf(", disabled on exec");
if ((arg & PROC_WXORX_ENFORCE) != 0)
printf(", wxorx enforced");
printf("\n");
break;
#ifdef PROC_KPTI_CTL
case MODE_KPTI:
switch (arg & ~PROC_KPTI_STATUS_ACTIVE) {
@ -353,6 +370,11 @@ main(int argc, char *argv[])
error = procctl(P_PID, pid, PROC_NO_NEW_PRIVS_CTL,
&arg);
break;
case MODE_WXMAP:
arg = enable ? PROC_WX_MAPPINGS_PERMIT :
PROC_WX_MAPPINGS_DISALLOW_EXEC;
error = procctl(P_PID, pid, PROC_WXMAP_CTL, &arg);
break;
#ifdef PROC_KPTI_CTL
case MODE_KPTI:
arg = enable ? PROC_KPTI_CTL_ENABLE_ON_EXEC :