Variable 'l_disk' initialized to a null pointer value, control jumps to 'case VIR_DOMAIN_DISK_DEVICE_DISK and then taking false branch, Within the expansion of the macro 'libxlError': Field access results in a dereference of a null pointer (loaded from variable 'l_disk'). * src/libxl/libxl_driver.c: Field access results in a dereference of a null pointer (loaded from variable 'l_disk') Signed-off-by: Alex Jia <ajia(a)redhat.com&gt; --- src/libxl/libxl_driver.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/src/libxl/libxl_driver.c b/src/libxl/libxl_driver.c index 91da438..bbc3059 100644 --- a/src/libxl/libxl_driver.c +++ b/src/libxl/libxl_driver.c @@ -3016,7 +3016,7 @@ libxlDomainDetachDeviceDiskLive(libxlDomainObjPrivatePtr priv, } else { libxlError(VIR_ERR_CONFIG_UNSUPPORTED, _("disk bus '%s' cannot be hot unplugged."), - virDomainDiskBusTypeToString(l_disk->bus)); + virDomainDiskBusTypeToString(dev->data.disk->bus)); } break; default: