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-rw-r--r--kernel/kmod.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/kmod.c b/kernel/kmod.c
index e4e5e98002fe..3f3bbae4cec3 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -28,6 +28,7 @@
#include <linux/cred.h>
#include <linux/file.h>
#include <linux/fdtable.h>
+#include <linux/fs_struct.h>
#include <linux/workqueue.h>
#include <linux/security.h>
#include <linux/mount.h>
@@ -223,6 +224,14 @@ static int call_usermodehelper_exec_async(void *data)
spin_unlock_irq(&current->sighand->siglock);
/*
+ * Initial kernel threads share ther FS with init, in order to
+ * get the init root directory. But we've now created a new
+ * thread that is going to execve a user process and has its own
+ * 'struct fs_struct'. Reset umask to the default.
+ */
+ current->fs->umask = 0022;
+
+ /*
* Our parent (unbound workqueue) runs with elevated scheduling
* priority. Avoid propagating that into the userspace child.
*/