kernel: fix vmalloc stack traces triggered by module with an empty init section ...

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@30813 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/generic/patches-3.2/340-module_alloc_size_check.patch b/target/linux/generic/patches-3.2/340-module_alloc_size_check.patch
new file mode 100644 (file)
index 0000000..6c7e50a
--- /dev/null
+++ b/target/linux/generic/patches-3.2/340-module_alloc_size_check.patch
@@ -0,0 +1,20 @@
+--- a/kernel/module.c
++++ b/kernel/module.c
+@@ -2286,12 +2286,15 @@
+ 
+ void * __weak module_alloc(unsigned long size)
+ {
+-      return size == 0 ? NULL : vmalloc_exec(size);
++      return vmalloc_exec(size);
+ }
+ 
+ static void *module_alloc_update_bounds(unsigned long size)
+ {
+-      void *ret = module_alloc(size);
++      void *ret = NULL;
++
++      if (size)
++              ret = module_alloc(size);
+ 
+       if (ret) {
+               mutex_lock(&module_mutex);

diff --git a/target/linux/generic/patches-3.3/340-module_alloc_size_check.patch b/target/linux/generic/patches-3.3/340-module_alloc_size_check.patch
new file mode 100644 (file)
index 0000000..9830bc5
--- /dev/null
+++ b/target/linux/generic/patches-3.3/340-module_alloc_size_check.patch
@@ -0,0 +1,20 @@
+--- a/kernel/module.c
++++ b/kernel/module.c
+@@ -2322,12 +2322,15 @@
+ 
+ void * __weak module_alloc(unsigned long size)
+ {
+-      return size == 0 ? NULL : vmalloc_exec(size);
++      return vmalloc_exec(size);
+ }
+ 
+ static void *module_alloc_update_bounds(unsigned long size)
+ {
+-      void *ret = module_alloc(size);
++      void *ret = NULL;
++
++      if (size)
++              ret = module_alloc(size);
+ 
+       if (ret) {
+               mutex_lock(&module_mutex);