From: Amit Shah <amit.s...@redhat.com>
Not handling EAGAIN triggers the assert
qemu/backends/rng-random.c:44:entropy_available: assertion failed: (len != -1)
Aborted (core dumped)
This happens when starting a guest with '-device virtio-rng-pci',
issuing a 'cat /dev/hwrng' in the guest, while also doing 'cat
/dev/random' on the host.
Reported-by: yunpingzheng <yunzh...@redhat.com>
Signed-off-by: Amit Shah <amit.s...@redhat.com>
Message-id:
eacda84dfaf2d99cf6d250b678be4e4d6c2088fb.1366108096.git.amit.s...@redhat.com
Signed-off-by: Anthony Liguori <aligu...@us.ibm.com>
(cherry picked from commit acbbc036619092fcd2c882222e1be168bd972b3e)
Signed-off-by: Michael Roth <mdr...@linux.vnet.ibm.com>
---
backends/rng-random.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/backends/rng-random.c b/backends/rng-random.c
index 0d11088..813388b 100644
--- a/backends/rng-random.c
+++ b/backends/rng-random.c
@@ -41,6 +41,9 @@ static void entropy_available(void *opaque)
ssize_t len;
len = read(s->fd, buffer, s->size);
+ if (len < 0 && errno == EAGAIN) {
+ return;
+ }
g_assert(len != -1);
s->receive_func(s->opaque, buffer, len);
--
1.7.9.5
