python2/00250-getentropy.patch

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diff --git a/Python/random.c b/Python/random.c
index 2f83b5d..4cae217 100644
--- a/Python/random.c
+++ b/Python/random.c
@@ -97,8 +97,15 @@ win32_urandom(unsigned char *buffer, Py_ssize_t size, int raise)
}
/* Issue #25003: Don't use getentropy() on Solaris (available since
- * Solaris 11.3), it is blocking whereas os.urandom() should not block. */
-#elif defined(HAVE_GETENTROPY) && !defined(sun)
+ Solaris 11.3), it is blocking whereas os.urandom() should not block.
+
+ Issue #29188: Don't use getentropy() on Linux since the glibc 2.24
+ implements it with the getrandom() syscall which can fail with ENOSYS,
+ and this error is not supported in py_getentropy() and getrandom() is called
+ with flags=0 which blocks until system urandom is initialized, which is not
+ the desired behaviour to seed the Python hash secret nor for os.urandom():
+ see the PEP 524 which was only implemented in Python 3.6. */
+#elif defined(HAVE_GETENTROPY) && !defined(sun) && !defined(linux)
#define PY_GETENTROPY 1
/* Fill buffer with size pseudo-random bytes generated by getentropy().