From: Julian Seward <jseward@acm.org>
Date: Mon, 3 Jun 2002 13:05:48 +0000 (+0000)
Subject: ioctl(generic): don't do make_readable(NULL, ...)
X-Git-Tag: svn/VALGRIND_1_0_3~106
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8bd93d8378ce3f43dbf34af4604838e2fe8645e0;p=thirdparty%2Fvalgrind.git

ioctl(generic): don't do make_readable(NULL, ...)


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@365
---

diff --git a/vg_syscall_mem.c b/vg_syscall_mem.c
index 64e44df36b..0e8ad1d1b1 100644
--- a/vg_syscall_mem.c
+++ b/vg_syscall_mem.c
@@ -2048,7 +2048,8 @@ void VG_(perform_assumed_nonblocking_syscall) ( ThreadId tid )
                }
                KERNEL_DO_SYSCALL(tid,res);
                if (size > 0 && (dir & _IOC_READ)
-                   && !VG_(is_kerror)(res) && res == 0)
+                   && !VG_(is_kerror)(res) && res == 0
+                   && arg3 != (Addr)NULL)
                   make_readable (arg3, size);
                break;
             }