From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40704) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fhhIF-0001QU-Ot for qemu-devel@nongnu.org; Mon, 23 Jul 2018 16:18:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fhhIE-0002Sp-R2 for qemu-devel@nongnu.org; Mon, 23 Jul 2018 16:18:55 -0400 Sender: fluxion From: Michael Roth Date: Mon, 23 Jul 2018 15:16:24 -0500 Message-Id: <20180723201748.25573-16-mdroth@linux.vnet.ibm.com> In-Reply-To: <20180723201748.25573-1-mdroth@linux.vnet.ibm.com> References: <20180723201748.25573-1-mdroth@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH 15/99] qemu-img: Use only string options in img_open_opts List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Max Reitz From: Max Reitz img_open_opts() takes a QemuOpts and converts them to a QDict, so all values therein are strings. Then it may try to call qdict_get_bool(), however, which will fail with a segmentation fault every time: $ ./qemu-img info -U --image-opts \ driver=file,filename=/dev/null,force-share=off [1] 27869 segmentation fault (core dumped) ./qemu-img info -U --image-opts driver=file,filename=/dev/null,force-share=off Fix this by using qdict_get_str() and comparing the value as a string. Also, when adding a force-share value to the QDict, add it as a string so it fits the rest of the dict. Cc: qemu-stable@nongnu.org Signed-off-by: Max Reitz Message-id: 20180502202051.15493-3-mreitz@redhat.com Reviewed-by: Eric Blake Signed-off-by: Max Reitz (cherry picked from commit 4615f87832d2fcb7a544bedeece2741bf8c21f94) Signed-off-by: Michael Roth --- qemu-img.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/qemu-img.c b/qemu-img.c index 15d457d6b8..b422fda6f3 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -277,12 +277,12 @@ static BlockBackend *img_open_opts(const char *optstr, options = qemu_opts_to_qdict(opts, NULL); if (force_share) { if (qdict_haskey(options, BDRV_OPT_FORCE_SHARE) - && !qdict_get_bool(options, BDRV_OPT_FORCE_SHARE)) { + && strcmp(qdict_get_str(options, BDRV_OPT_FORCE_SHARE), "on")) { error_report("--force-share/-U conflicts with image options"); QDECREF(options); return NULL; } - qdict_put_bool(options, BDRV_OPT_FORCE_SHARE, true); + qdict_put_str(options, BDRV_OPT_FORCE_SHARE, "on"); } blk = blk_new_open(NULL, NULL, options, flags, &local_err); if (!blk) { -- 2.17.1