| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 022/102] scsi: ufs: Check that space was properly alloced in copy_query_response | Date | Mon, 8 Jul 2019 17:12:15 +0200 |
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[ Upstream commit 1c90836f70f9a8ef7b7ad9e1fdd8961903e6ced6 ]
struct ufs_dev_cmd is the main container that supports device management commands. In the case of a read descriptor request, we assume that the proper space was allocated in dev_cmd to hold the returning descriptor.
This is no longer true, as there are flows that doesn't use dev_cmd for device management requests, and was wrong in the first place.
Fixes: d44a5f98bb49 (ufs: query descriptor API) Signed-off-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Acked-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/scsi/ufs/ufshcd.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 0fe4f8e8c8c9..a9c172692f21 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -941,7 +941,8 @@ int ufshcd_copy_query_response(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) memcpy(&query_res->upiu_res, &lrbp->ucd_rsp_ptr->qr, QUERY_OSF_SIZE); /* Get the descriptor */ - if (lrbp->ucd_rsp_ptr->qr.opcode == UPIU_QUERY_OPCODE_READ_DESC) { + if (hba->dev_cmd.query.descriptor && + lrbp->ucd_rsp_ptr->qr.opcode == UPIU_QUERY_OPCODE_READ_DESC) { u8 *descp = (u8 *)lrbp->ucd_rsp_ptr + GENERAL_UPIU_REQUEST_SIZE; u16 resp_len; -- 2.20.1
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