On Wed, Aug 01, 2018 at 01:44:32PM +0200, Michal Privoznik wrote: > The function is supposed to return up to 64bit long integer. In > order to do that it calls virRandomBytes() to fill the integer > with random bytes and then masks out everything but requested > bits. However, when doing that it shifts 1U and not 1ULL. So > effectively, requesting 32 random bis or more always return 0 > which is not random enough. > > Signed-off-by: Michal Privoznik <mprivozn@xxxxxxxxxx> > --- > src/util/virrandom.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/src/util/virrandom.c b/src/util/virrandom.c > index 01cc82a052..3c011a8615 100644 > --- a/src/util/virrandom.c > +++ b/src/util/virrandom.c > @@ -68,7 +68,7 @@ uint64_t virRandomBits(int nbits) > return 0; > } > > - ret &= (1U << nbits) - 1; > + ret &= (1ULL << nbits) - 1; > return ret; > } Reviewed-by: Daniel P. Berrangé <berrange@xxxxxxxxxx> Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :| -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list
