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 <yunzheng@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Message-id:
eacda84dfaf2d99cf6d250b678be4e4d6c2088fb.
1366108096.git.amit.shah@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
(cherry picked from commit
acbbc036619092fcd2c882222e1be168bd972b3e)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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);