util-linux: avoid using the getrandom syscall

getrandom blocks until the random pool is being initialized.
Unfortunately, this code is being called early during init to create the
overlay filesystem, on some devices leaving little chance for a
successful random pool init.
True randomness is not that important here, so fix this issue by
sticking to using /dev/urandom, like in older versions of this code.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2017-09-29 12:30:52 +02:00
parent 657f2a1ff8
commit e64463ebde

View File

@ -0,0 +1,14 @@
--- a/lib/randutils.c
+++ b/lib/randutils.c
@@ -25,6 +25,11 @@
#define THREAD_LOCAL static
#endif
+/* force /dev/urandom to avoid hanging on early boot */
+#undef HAVE_GETRANDOM
+#undef SYS_getrandom
+#undef __NR_getrandom
+
#ifdef HAVE_GETRANDOM
# include <sys/random.h>
#elif defined (__linux__)