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[hurd] 66/87: exec: redzone page zero before loading anything
From: |
Samuel Thibault |
Subject: |
[hurd] 66/87: exec: redzone page zero before loading anything |
Date: |
Sun, 09 Nov 2014 11:05:05 +0000 |
This is an automated email from the git hooks/post-receive script.
sthibault pushed a commit to branch upstream
in repository hurd.
commit db9ad21d272a4dce53c35095b97ca0a597b45004
Author: Justus Winter <address@hidden>
Date: Mon Sep 22 17:59:57 2014 +0200
exec: redzone page zero before loading anything
This prevents load_section from mapping any sections to page zero.
* exec/exec.c (do_exec): Redzone page zero before loading anything.
---
exec/exec.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/exec/exec.c b/exec/exec.c
index 2fc1e44..0ecf2d3 100644
--- a/exec/exec.c
+++ b/exec/exec.c
@@ -1116,6 +1116,16 @@ do_exec (file_t file,
mach_port_destroy (oldtask, destroynames[i]);
}
+ /* Map page zero redzoned. */
+ {
+ vm_address_t addr = 0;
+ e.error = vm_map (newtask,
+ &addr, vm_page_size, 0, 0, MACH_PORT_NULL, 0, 1,
+ VM_PROT_NONE, VM_PROT_NONE, VM_INHERIT_COPY);
+ if (e.error)
+ goto out;
+ }
+
/* XXX this should be below
it is here to work around a vm_map kernel bug. */
if (interp.file != MACH_PORT_NULL)
--
Alioth's /usr/local/bin/git-commit-notice on
/srv/git.debian.org/git/pkg-hurd/hurd.git
- [hurd] 55/87: libihash: fix comparison between signed and unsigned integer, (continued)
- [hurd] 55/87: libihash: fix comparison between signed and unsigned integer, Samuel Thibault, 2014/11/09
- [hurd] 54/87: trans/mtab: use setnullauth to drop privileges, Samuel Thibault, 2014/11/09
- [hurd] 21/87: ext2fs: fix compiler warning, Samuel Thibault, 2014/11/09
- [hurd] 49/87: Add missing linefeed, Samuel Thibault, 2014/11/09
- [hurd] 58/87: libdiskfs: fix /servers/exec lookup, Samuel Thibault, 2014/11/09
- [hurd] 59/87: hurd: make memory_object parameter polymorphic, Samuel Thibault, 2014/11/09
- [hurd] 61/87: procfs: fix typo in comment, Samuel Thibault, 2014/11/09
- [hurd] 53/87: libtrivfs: fix typo, Samuel Thibault, 2014/11/09
- [hurd] 64/87: BSD apps want sin_zero cleared in sys_getname., Samuel Thibault, 2014/11/09
- [hurd] 60/87: trans/hello{, -mt}: properly escape contents in trivfs_append_args, Samuel Thibault, 2014/11/09
- [hurd] 66/87: exec: redzone page zero before loading anything,
Samuel Thibault <=
- [hurd] 52/87: libdiskfs: fix reference counting of peropen objects, Samuel Thibault, 2014/11/09
- [hurd] 62/87: hurd: add symbolic name for the mtab translator, Samuel Thibault, 2014/11/09
- [hurd] 70/87: procfs: generalize the translator linkage code, Samuel Thibault, 2014/11/09
- [hurd] 56/87: hurd: fix semantic of file_get_children, Samuel Thibault, 2014/11/09
- [hurd] 47/87: Make the ncursesw driver of the console client compile properly, Samuel Thibault, 2014/11/09
- [hurd] 65/87: exec: add proper argument parsing, add --device-master-port, Samuel Thibault, 2014/11/09
- [hurd] 18/87: hurd: fix type of optimal_transfer_size, Samuel Thibault, 2014/11/09
- [hurd] 50/87: sutils: add urandom device target to MAKEDEV, Samuel Thibault, 2014/11/09
- [hurd] 45/87: Revert "libpipe: fix calls to pipe_send with no data", Samuel Thibault, 2014/11/09
- [hurd] 57/87: include: detect use-after-free errors using the reference counts, Samuel Thibault, 2014/11/09