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From ef9bacb8ce672161449683f748d4df76c4b78a54 Mon Sep 17 00:00:00 2001
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Message-Id: <ef9bacb8ce672161449683f748d4df76c4b78a54@dist-git>
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From: Peter Krempa <pkrempa@redhat.com>
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Date: Thu, 7 Dec 2017 13:45:50 +0100
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Subject: [PATCH] storage: Don't dereference driver object if virStorageSource
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is not initialized
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virStorageFileReportBrokenChain uses data from the driver private data
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pointer to print the user and group. This would lead to a crash in call
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paths where we did not initialize the storage backend as recently added
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in commit 24e47ee2b93 to qemuDomainDetermineDiskChain.
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Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1522682
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(cherry picked from commit 2d07f1f0ebd44b0348daa61afa0de34f3f838c22)
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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---
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src/storage/storage_source.c | 36 +++++++++++++++++++++++++-----------
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1 file changed, 25 insertions(+), 11 deletions(-)
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diff --git a/src/storage/storage_source.c b/src/storage/storage_source.c
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index 469d3a00bc..aaec988e9a 100644
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--- a/src/storage/storage_source.c
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+++ b/src/storage/storage_source.c
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@@ -404,19 +404,33 @@ virStorageFileReportBrokenChain(int errcode,
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virStorageSourcePtr src,
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virStorageSourcePtr parent)
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{
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- unsigned int access_user = src->drv->uid;
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- unsigned int access_group = src->drv->gid;
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- if (src == parent) {
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- virReportSystemError(errcode,
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- _("Cannot access storage file '%s' "
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- "(as uid:%u, gid:%u)"),
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- src->path, access_user, access_group);
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+ if (src->drv) {
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+ unsigned int access_user = src->drv->uid;
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+ unsigned int access_group = src->drv->gid;
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+
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+ if (src == parent) {
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+ virReportSystemError(errcode,
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+ _("Cannot access storage file '%s' "
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+ "(as uid:%u, gid:%u)"),
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+ src->path, access_user, access_group);
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+ } else {
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+ virReportSystemError(errcode,
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+ _("Cannot access backing file '%s' "
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+ "of storage file '%s' (as uid:%u, gid:%u)"),
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+ src->path, parent->path, access_user, access_group);
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+ }
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} else {
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- virReportSystemError(errcode,
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- _("Cannot access backing file '%s' "
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- "of storage file '%s' (as uid:%u, gid:%u)"),
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- src->path, parent->path, access_user, access_group);
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+ if (src == parent) {
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+ virReportSystemError(errcode,
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+ _("Cannot access storage file '%s'"),
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+ src->path);
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+ } else {
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+ virReportSystemError(errcode,
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+ _("Cannot access backing file '%s' "
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+ "of storage file '%s'"),
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+ src->path, parent->path);
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+ }
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}
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}
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--
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2.15.1
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