From: Gustavo A. R. Silva Date: Tue, 11 Nov 2025 09:01:24 +0000 (+0900) Subject: iommufd/driver: Fix counter initialization for counted_by annotation X-Git-Tag: v6.18~29^2~1 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ac84ff453305d12bc799074a9f9af30ff97fff70;p=thirdparty%2Flinux.git iommufd/driver: Fix counter initialization for counted_by annotation One of the requirements for counted_by annotations is that the counter member must be initialized before the first reference to the flexible-array member. Move the vevent->data_len = data_len; initialization to before the first access to flexible array vevent->event_data. Link: https://patch.msgid.link/r/aRL7ZFFqM5bRTd2D@kspp Cc: stable@vger.kernel.org Fixes: e8e1ef9b77a7 ("iommufd/viommu: Add iommufd_viommu_report_event helper") Signed-off-by: "Gustavo A. R. Silva" Reviewed-by: Kevin Tian Reviewed-by: Nicolin Chen Signed-off-by: Jason Gunthorpe --- diff --git a/drivers/iommu/iommufd/driver.c b/drivers/iommu/iommufd/driver.c index 6f1010da221c..21d4a35538f6 100644 --- a/drivers/iommu/iommufd/driver.c +++ b/drivers/iommu/iommufd/driver.c @@ -161,8 +161,8 @@ int iommufd_viommu_report_event(struct iommufd_viommu *viommu, vevent = &veventq->lost_events_header; goto out_set_header; } - memcpy(vevent->event_data, event_data, data_len); vevent->data_len = data_len; + memcpy(vevent->event_data, event_data, data_len); veventq->num_events++; out_set_header: