From: Dermot Bradley <dermot_bradley@yahoo.com>
Date: Mon, 10 Apr 2023 14:25 +0100

On a failure of jent_read_entropy() where the entropy collector will
be reallocated, jent_entropy_collector_free() is used to release
*ec, but *ec is not set to NULL. If a failure occurs in the
following call to jent_entropy_collector_ex() then the function will
return with a dangling pointer remaining in *ec. Set *ec to NULL
after freeing to prevent this.

Upstream PR #97, already merged in master.

---

diff -aur a/src/jitterentropy-base.c b/src/jitterentropy-base.c
--- a/src/jitterentropy-base.c
+++ b/src/jitterentropy-base.c
@@ -308,6 +308,7 @@
 			 * memory size
 			 */
 			jent_entropy_collector_free(*ec);
+			*ec = NULL;
 
 			/* Perform new health test with updated OSR */
 			if (jent_entropy_init_ex(osr, flags))