From 3b8a1ec6c400a4e5af0f7f5889b360d2ed16f572 Mon Sep 17 00:00:00 2001 From: Jonathan Lebon Date: Tue, 3 Dec 2019 21:36:40 -0500 Subject: [PATCH] libpriv/kernel: add cap_mknod to dracut run A lot of history with this. But essentially, dracut tries to `mknod` a few character devices like `/dev/random` and `/dev/urandom` and fails. We originally blocked `cap_mknod` because, well, `%post` scripts don't really need to do that, and it would get wiped anyway. But there is a use case for dracut's CPIO: we want `/dev/*random` to be available in early boot *before* systemd even mounts `devtmpfs` because libgcrypt as part of its constructor-time selftests in FIPS mode wants to read from there. For more fun, see: https://bugzilla.redhat.com/show_bug.cgi?id=1778940 https://bugzilla.redhat.com/show_bug.cgi?id=1401444 https://bugzilla.redhat.com/show_bug.cgi?id=1380866 --- src/libpriv/rpmostree-kernel.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/libpriv/rpmostree-kernel.c b/src/libpriv/rpmostree-kernel.c index 2bea504c..a7fffcb6 100644 --- a/src/libpriv/rpmostree-kernel.c +++ b/src/libpriv/rpmostree-kernel.c @@ -564,6 +564,12 @@ rpmostree_run_dracut (int rootfs_dfd, rpmostree_bwrap_bind_read (bwrap, "usr", "/usr"); } + /* Need to let dracut create devices like /dev/urandom: + * https://bugzilla.redhat.com/show_bug.cgi?id=1778940 + * https://bugzilla.redhat.com/show_bug.cgi?id=1401444 + * https://bugzilla.redhat.com/show_bug.cgi?id=1380866 */ + rpmostree_bwrap_append_bwrap_argv (bwrap, "--cap-add", "cap_mknod", NULL); + if (dracut_host_tmpdir) rpmostree_bwrap_bind_readwrite (bwrap, dracut_host_tmpdir->path, "/tmp/dracut"); -- 2.23.0