linux-kernel - [REF PATCH] scsi: ufs: fix lrbp pointer incorrect initialization issue

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:   Sun,  8 Mar 2020 01:16:27 +0100
From:   Bean Huo <huobean@...il.com>
To:     alim.akhtar@...sung.com, avri.altman@....com,
        asutoshd@...eaurora.org, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, stanley.chu@...iatek.com,
        beanhuo@...ron.com, bvanassche@....org, tomas.winkler@...el.com,
        cang@...eaurora.org
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [REF PATCH] scsi: ufs: fix lrbp pointer incorrect initialization issue

The paramter cmd of ufshcd_init_cmd_priv() didn't take correct
tag value, this results in all pointers of lrbp points to first
the lrbp.
As this is just observed, this patch is for referecen so others
who want to use latest UFS driver can avoid this issue.

Fixes: 34656dda81ac ("scsi: ufs: Let the SCSI core allocate per-command UFS data")
---
 drivers/scsi/ufs/ufshcd.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index e987fa3a77c7..3ccf431e21b8 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -2471,6 +2471,8 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
 		BUG();
 	}
 
+	ufshcd_init_lrb(hba, lrbp, tag);
+
 	WARN_ON_ONCE(!ufshcd_is_scsi(cmd->request));
 
 	if (!down_read_trylock(&hba->clk_scaling_lock))
@@ -2713,6 +2715,8 @@ static int ufshcd_exec_dev_cmd(struct ufs_hba *hba,
 
 	hba->dev_cmd.complete = &wait;
 
+	ufshcd_init_lrb(hba, lrbp, tag);
+
 	ufshcd_add_query_upiu_trace(hba, tag, "query_send");
 	/* Make sure descriptors are ready before ringing the doorbell */
 	wmb();
@@ -5900,6 +5904,7 @@ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba,
 
 	init_completion(&wait);
 	lrbp = ufshcd_req_to_lrb(req);
+	ufshcd_init_lrb(hba, lrbp, tag);
 	lrbp->sense_bufflen = 0;
 	lrbp->sense_buffer = NULL;
 	lrbp->task_tag = tag;
-- 
2.17.1