From 0315fef2aff9f251ddef8a4b53db9187429c3553 Mon Sep 17 00:00:00 2001 From: Long Li Date: Mon, 5 May 2025 17:56:35 -0700 Subject: [PATCH] uio_hv_generic: Align ring size to system page Following the ring header, the ring data should align to system page boundary. Adjust the size if necessary. Cc: stable@vger.kernel.org Fixes: 95096f2fbd10 ("uio-hv-generic: new userspace i/o driver for VMBus") Signed-off-by: Long Li Reviewed-by: Michael Kelley Link: https://lore.kernel.org/r/1746492997-4599-4-git-send-email-longli@linuxonhyperv.com Signed-off-by: Wei Liu Message-ID: <1746492997-4599-4-git-send-email-longli@linuxonhyperv.com> --- drivers/uio/uio_hv_generic.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c index cc3a350dbbd5..aac67a4413ce 100644 --- a/drivers/uio/uio_hv_generic.c +++ b/drivers/uio/uio_hv_generic.c @@ -243,6 +243,9 @@ hv_uio_probe(struct hv_device *dev, if (!ring_size) ring_size = SZ_2M; + /* Adjust ring size if necessary to have it page aligned */ + ring_size = VMBUS_RING_SIZE(ring_size); + pdata = devm_kzalloc(&dev->device, sizeof(*pdata), GFP_KERNEL); if (!pdata) return -ENOMEM;