From 14768fe9b44d6c89c066ebf597b9be79f7d43f30 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Wed, 14 Aug 2019 11:28:11 +0100
Subject: [PATCH 3/3] qemu-img: fix regression copying secrets during convert
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RH-Author: Kevin Wolf <kwolf@redhat.com>
Message-id: <20190814112811.28642-2-kwolf@redhat.com>
Patchwork-id: 89987
O-Subject: [RHEL-8.1.0 qemu-kvm PATCH 1/1] qemu-img: fix regression copying secrets during convert
Bugzilla: 1727821
RH-Acked-by: Max Reitz <mreitz@redhat.com>
RH-Acked-by: John Snow <jsnow@redhat.com>
RH-Acked-by: Thomas Huth <thuth@redhat.com>
From: Daniel P. Berrangé <berrange@redhat.com>
When the convert command is creating an output file that needs
secrets, we need to ensure those secrets are passed to both the
blk_new_open and bdrv_create API calls.
This is done by qemu-img extracting all opts matching the name
suffix "key-secret". Unfortunately the code doing this was run after the
call to bdrv_create(), which meant the QemuOpts it was extracting
secrets from was now empty.
Previously this worked by luks as a bug meant the "key-secret"
parameters were not purged from the QemuOpts. This bug was fixed in
commit b76b4f604521e59f857d6177bc55f6f2e41fd392
Author: Kevin Wolf <kwolf@redhat.com>
Date: Thu Jan 11 16:18:08 2018 +0100
qcow2: Use visitor for options in qcow2_create()
Exposing the latent bug in qemu-img. This fix simply moves the copying
of secrets to before the bdrv_create() call.
Cc: qemu-stable@nongnu.org
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 8d65a3ccfd5db7f0436e095cd952f5d0c3a873ba)
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
qemu-img.c | 32 +++++++++++++++-----------------
1 file changed, 15 insertions(+), 17 deletions(-)
diff --git a/qemu-img.c b/qemu-img.c
index f42750a..fa0cbd7 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -348,21 +348,6 @@ static int img_add_key_secrets(void *opaque,
return 0;
}
-static BlockBackend *img_open_new_file(const char *filename,
- QemuOpts *create_opts,
- const char *fmt, int flags,
- bool writethrough, bool quiet,
- bool force_share)
-{
- QDict *options = NULL;
-
- options = qdict_new();
- qemu_opt_foreach(create_opts, img_add_key_secrets, options, &error_abort);
-
- return img_open_file(filename, options, fmt, flags, writethrough, quiet,
- force_share);
-}
-
static BlockBackend *img_open(bool image_opts,
const char *filename,
@@ -1994,6 +1979,7 @@ static int img_convert(int argc, char **argv)
BlockDriverState *out_bs;
QemuOpts *opts = NULL, *sn_opts = NULL;
QemuOptsList *create_opts = NULL;
+ QDict *open_opts = NULL;
char *options = NULL;
Error *local_err = NULL;
bool writethrough, src_writethrough, quiet = false, image_opts = false,
@@ -2342,6 +2328,16 @@ static int img_convert(int argc, char **argv)
}
}
+ /*
+ * The later open call will need any decryption secrets, and
+ * bdrv_create() will purge "opts", so extract them now before
+ * they are lost.
+ */
+ if (!skip_create) {
+ open_opts = qdict_new();
+ qemu_opt_foreach(opts, img_add_key_secrets, open_opts, &error_abort);
+ }
+
if (!skip_create) {
/* Create the new image */
ret = bdrv_create(drv, out_filename, opts, &local_err);
@@ -2368,8 +2364,9 @@ static int img_convert(int argc, char **argv)
* That has to wait for bdrv_create to be improved
* to allow filenames in option syntax
*/
- s.target = img_open_new_file(out_filename, opts, out_fmt,
- flags, writethrough, quiet, false);
+ s.target = img_open_file(out_filename, open_opts, out_fmt,
+ flags, writethrough, quiet, false);
+ open_opts = NULL; /* blk_new_open will have freed it */
}
if (!s.target) {
ret = -1;
@@ -2437,6 +2434,7 @@ out:
qemu_opts_del(opts);
qemu_opts_free(create_opts);
qemu_opts_del(sn_opts);
+ qobject_unref(open_opts);
blk_unref(s.target);
if (s.src) {
for (bs_i = 0; bs_i < s.src_num; bs_i++) {
--
1.8.3.1