From d68ccc08416ce0117c59a7ddac97d443f8239d12 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Wed, 7 Nov 2018 18:37:13 +0100 Subject: random-util: handle if getrandom() returns 0 This should normally not happen, but given that the man page suggests something about this in the context of interruption, let's handle this and propagate an I/O error. --- src/basic/random-util.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'src/basic/random-util.c') diff --git a/src/basic/random-util.c b/src/basic/random-util.c index 5e4ed2da9d..3989bb9dc6 100644 --- a/src/basic/random-util.c +++ b/src/basic/random-util.c @@ -93,6 +93,9 @@ int genuine_random_bytes(void *p, size_t n, bool high_quality_required) { } already_done = r; + } else if (r == 0) { + have_syscall = true; + return -EIO; } else if (errno == ENOSYS) /* We lack the syscall, continue with reading from /dev/urandom. */ have_syscall = false; -- cgit v1.2.1