Also, the call_usermodehelper_fns() interface is rather nasty. Let's
try to prevent mistakes:
--- a/kernel/kmod.c~a
+++ a/kernel/kmod.c
@@ -577,6 +577,12 @@ unlock:
return retval;
}
+/*
+ * call_usermodehelper_fns() will not run the caller-provided cleanup function
+ * if a memory allocation failure is experienced. So the caller might need to
+ * check the call_usermodehelper_fns() return value: if it is -ENOMEM, perform
+ * the necessaary cleanup within the caller.
+ */
int call_usermodehelper_fns(
char *path, char **argv, char **envp, int wait,
int (*init)(struct subprocess_info *info, struct cred *new),
_
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