From: Eugene Syromyatnikov <evgsyr@gmail.com>
Date: Tue, 6 Dec 2016 19:14:48 +0000 (+0300)
Subject: prctl: implement decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE
X-Git-Tag: v4.16~353
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ea01cb0e5be9c5584279b0e315aa95c683801296;p=strace

prctl: implement decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE

* xlat/pr_dumpable.in: New file.
* prctl.c: Include "xlat/pr_dumpable.h".
(SYS_FUNC(prctl)): Decode returned value of PR_GET_DUMPABLE operation
and the second syscall argument of PR_SET_DUMPABLE operation
as SUID_DUMP_* constants.
---

diff --git a/prctl.c b/prctl.c
index 32b79d78..bc15df81 100644
--- a/prctl.c
+++ b/prctl.c
@@ -34,6 +34,7 @@
 
 #include "xlat/prctl_options.h"
 #include "xlat/pr_cap_ambient.h"
+#include "xlat/pr_dumpable.h"
 #include "xlat/pr_fp_mode.h"
 #include "xlat/pr_mce_kill.h"
 #include "xlat/pr_mce_kill_policy.h"
@@ -91,7 +92,6 @@ SYS_FUNC(prctl)
 		printxval(prctl_options, option, "PR_???");
 
 	switch (option) {
-	case PR_GET_DUMPABLE:
 	case PR_GET_KEEPCAPS:
 	case PR_GET_SECCOMP:
 	case PR_GET_TIMERSLACK:
@@ -108,6 +108,14 @@ SYS_FUNC(prctl)
 			printnum_int(tcp, arg2, "%u");
 		break;
 
+	case PR_GET_DUMPABLE:
+		if (entering(tcp))
+			break;
+		if (syserror(tcp))
+			return 0;
+		tcp->auxstr = xlookup(pr_dumpable, (unsigned long) tcp->u_rval);
+		return RVAL_STR;
+
 	case PR_GET_NAME:
 		if (entering(tcp)) {
 			tprints(", ");
@@ -181,7 +189,6 @@ SYS_FUNC(prctl)
 		return RVAL_DECODED;
 
 	case PR_SET_CHILD_SUBREAPER:
-	case PR_SET_DUMPABLE:
 	case PR_SET_ENDIAN:
 	case PR_SET_FPEMU:
 	case PR_SET_FPEXC:
@@ -190,6 +197,11 @@ SYS_FUNC(prctl)
 		tprintf(", %llu", arg2);
 		return RVAL_DECODED;
 
+	case PR_SET_DUMPABLE:
+		tprints(", ");
+		printxval64(pr_dumpable, arg2, "SUID_DUMP_???");
+		return RVAL_DECODED;
+
 	case PR_CAPBSET_DROP:
 	case PR_CAPBSET_READ:
 		tprints(", ");
diff --git a/xlat/pr_dumpable.in b/xlat/pr_dumpable.in
new file mode 100644
index 00000000..0334b0b9
--- /dev/null
+++ b/xlat/pr_dumpable.in
@@ -0,0 +1,4 @@
+/* Defined in include/linux/sched.h */
+SUID_DUMP_DISABLE	0	/* No setuid dumping */
+SUID_DUMP_USER		1	/* Dump as user of process */
+SUID_DUMP_ROOT		2	/* Dump as root */