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Added patch to keep reference on mapping for shared PE mappings.

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This commit is contained in:
Sebastian Lackner
2017-10-04 03:22:01 +02:00
parent 431c546ca5
commit 2d16aafa9a
3 changed files with 60 additions and 0 deletions
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40
patches/server-shared_mapping/0001-server-Keep-reference-on-mapping-for-shared-mappings.patch Normal file
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@@ -0,0 +1,40 @@
From 11ed96d6ecfa031fba1cbc80b4e9113bcad6173f Mon Sep 17 00:00:00 2001
From: Sebastian Lackner <sebastian@fds-team.de>
Date: Wed, 4 Oct 2017 03:20:48 +0200
Subject: server: Keep reference on mapping for shared mappings.
---
server/mapping.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/server/mapping.c b/server/mapping.c
index 5db03f8861a..0a39df69c7a 100644
--- a/server/mapping.c
+++ b/server/mapping.c
@@ -110,6 +110,7 @@ static const struct object_ops ranges_ops =
struct memory_view
{
struct list entry; /* entry in per-process view list */
+ struct mapping *mapping; /* for shared PE mappings */
struct fd *fd; /* fd for mapped file */
struct ranges *committed; /* list of committed ranges in this mapping */
unsigned int flags; /* SEC_* flags */
@@ -336,6 +337,7 @@ static struct memory_view *find_mapped_view( struct process *process, client_ptr
static void free_memory_view( struct memory_view *view )
{
+ if (view->mapping) release_object( view->mapping );
if (view->fd) release_object( view->fd );
if (view->committed) release_object( view->committed );
list_remove( &view->entry );
@@ -989,6 +991,7 @@ DECL_HANDLER(map_view)
view->size = req->size;
view->start = req->start;
view->flags = mapping->flags;
+ view->mapping = mapping->shared_file ? (struct mapping *)grab_object( mapping ) : NULL;
view->fd = !is_fd_removable( mapping->fd ) ? (struct fd *)grab_object( mapping->fd ) : NULL;
view->committed = mapping->committed ? (struct ranges *)grab_object( mapping->committed ) : NULL;
list_add_tail( &current->process->views, &view->entry );
--
2.14.1

1
patches/server-shared_mapping/definition Normal file
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@@ -0,0 +1 @@
Fixes: [43829] Keep reference on mapping for shared PE mappings