5.15-stable review patch. If anyone has any objections, please let me know.
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From: Long Li longli@microsoft.com
[ Upstream commit 0315fef2aff9f251ddef8a4b53db9187429c3553 ]
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 longli@microsoft.com Reviewed-by: Michael Kelley mhklinux@outlook.com Link: https://lore.kernel.org/r/1746492997-4599-4-git-send-email-longli@linuxonhyp... Signed-off-by: Wei Liu wei.liu@kernel.org Message-ID: 1746492997-4599-4-git-send-email-longli@linuxonhyperv.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 db8a450b5a19b..865a5b289e0a5 100644 --- a/drivers/uio/uio_hv_generic.c +++ b/drivers/uio/uio_hv_generic.c @@ -260,6 +260,9 @@ hv_uio_probe(struct hv_device *dev, if (!ring_size) ring_size = HV_RING_SIZE * PAGE_SIZE;
+ /* 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;