From d0f2fffa7c1a86f56f18143a1a14b9a32f8bcf16 Mon Sep 17 00:00:00 2001 Message-Id: From: John Ferlan Date: Wed, 16 Jan 2019 15:54:31 -0500 Subject: [PATCH] qemu: Fix logic error in qemuSetUnprivSGIO MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit https://bugzilla.redhat.com/show_bug.cgi?id=1666605 RHEL-only Commit c0f26a13c6 had a logic error with using both DISK and sgio which resulted in a DISK that didn't have sgio set falling into the else clause and trying to deref a NULL @hostdev resulting in a libvirtd crash: Thread 1 (Thread 0x7ffbc6353700 (LWP 12642)): 0 0x00007ffb958e7d7a in qemuSetUnprivSGIO 1 0x00007ffb958d9d92 in qemuDomainAttachDeviceDiskLive 2 0x00007ffb9594fce8 in qemuDomainAttachDeviceFlags 3 0x00007ffbde399d71 in virDomainAttachDevice 4 0x0000563b73ded4b2 in remoteDispatchDomainAttachDeviceHelper for hotplug of XML: Signed-off-by: John Ferlan Reviewed-by: Ján Tomko --- src/qemu/qemu_conf.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c index 5971f3eb64..768e9d8308 100644 --- a/src/qemu/qemu_conf.c +++ b/src/qemu/qemu_conf.c @@ -1679,9 +1679,9 @@ qemuSetUnprivSGIO(virDomainDeviceDefPtr dev) goto cleanup; /* By default, filter the SG_IO commands, i.e. set unpriv_sgio to 0. */ - if (dev->type == VIR_DOMAIN_DEVICE_DISK && - disk->sgio == VIR_DOMAIN_DEVICE_SGIO_UNFILTERED) { - val = 1; + if (dev->type == VIR_DOMAIN_DEVICE_DISK) { + if (disk->sgio == VIR_DOMAIN_DEVICE_SGIO_UNFILTERED) + val = 1; } else { /* Only settable if was present for hostdev */ if (qemuIsSharedHostdev(hostdev) && -- 2.20.1