* [Qemu-devel] [PATCH] Correct setuid behavious in linux-user
@ 2007-03-19 15:25 Stuart Anderson
0 siblings, 0 replies; only message in thread
From: Stuart Anderson @ 2007-03-19 15:25 UTC (permalink / raw)
To: qemu-devel
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The attached patch is needed to correctly emulate setuid executables.
With this change, and by making qemu be setuid root (and assumming all
of the risks and responsibilites of doing so), executables such as
/bin/su will be able to create the correct environment.
Stuart
Stuart R. Anderson anderson@netsweng.com
Network & Software Engineering http://www.netsweng.com/
1024D/37A79149: 0791 D3B8 9A4C 2CDC A31F
BD03 0A62 E534 37A7 9149
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Index: linux-user/linuxload.c
===================================================================
RCS file: /sources/qemu/qemu/linux-user/linuxload.c,v
retrieving revision 1.2
diff -u -r1.2 linuxload.c
--- linux-user/linuxload.c 19 Nov 2006 20:29:35 -0000 1.2
+++ linux-user/linuxload.c 19 Mar 2007 15:09:50 -0000
@@ -78,6 +78,8 @@
if(bprm->e_uid != geteuid()) {
id_change = 1;
}
+ } else {
+ seteuid(getuid());
}
/* Set-gid? */
@@ -91,6 +93,8 @@
if (!in_group_p(bprm->e_gid)) {
id_change = 1;
}
+ } else {
+ setegid(getgid());
}
memset(bprm->buf, 0, sizeof(bprm->buf));
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2007-03-19 15:25 [Qemu-devel] [PATCH] Correct setuid behavious in linux-user Stuart Anderson
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