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-rw-r--r--fs/exec.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/exec.c b/fs/exec.c
index d7f9e14f8977..48c525115fe4 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -2318,3 +2318,25 @@ int dump_seek(struct file *file, loff_t off)
return ret;
}
EXPORT_SYMBOL(dump_seek);
+
+#ifdef __ARCH_WANT_KERNEL_EXECVE
+int kernel_execve(const char *filename,
+ const char *const argv[],
+ const char *const envp[])
+{
+ struct pt_regs *p = current_pt_regs();
+ int ret;
+
+ ret = do_execve(filename,
+ (const char __user *const __user *)argv,
+ (const char __user *const __user *)envp, p);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * We were successful. We won't be returning to our caller, but
+ * instead to user space by manipulating the kernel stack.
+ */
+ ret_from_kernel_execve(p);
+}
+#endif