From: Dmitry V. Levin <ldv@altlinux.org>
Date: Tue, 20 Dec 2016 01:11:53 +0000 (+0000)
Subject: x32: fix decoding of mprotect and pkey_mprotect syscall arguments
X-Git-Tag: v4.16~321
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=874caabc0f3f930252de082d4189163997c6ead0;p=strace

x32: fix decoding of mprotect and pkey_mprotect syscall arguments

As there are no compat versions of mprotect or pkey_mprotect syscalls
in x32 personality, "addr", "len", and "prot" syscall arguments have
kernel_ulong_t type and should be printed accordingly.

* mem.c (do_mprotect): Retrieve 1st, 2nd and 3rd arguments using
getarg_klu, print them using printaddr_klu, PRI_klu format,
and printflags64, correspondingly.
---

diff --git a/mem.c b/mem.c
index 437b8ea5..b683a095 100644
--- a/mem.c
+++ b/mem.c
@@ -185,9 +185,9 @@ SYS_FUNC(munmap)
 static int
 do_mprotect(struct tcb *tcp, bool has_pkey)
 {
-	printaddr(tcp->u_arg[0]);
-	tprintf(", %lu, ", tcp->u_arg[1]);
-	printflags_long(mmap_prot, tcp->u_arg[2], "PROT_???");
+	printaddr_klu(getarg_klu(tcp, 0));
+	tprintf(", %" PRI_klu ", ", getarg_klu(tcp, 1));
+	printflags64(mmap_prot, getarg_klu(tcp, 2), "PROT_???");
 
 	if (has_pkey)
 		tprintf(", %d", (int) tcp->u_arg[3]);