netdev - [PATCH] vhost-scsi: Fix check for inline_sg

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Message-ID: <20250607194103.1770451-1-alok.a.tiwari@oracle.com>
Date: Sat,  7 Jun 2025 12:40:29 -0700
From: Alok Tiwari <alok.a.tiwari@...cle.com>
To: mst@...hat.com, jasowang@...hat.com, michael.christie@...cle.com,
        pbonzini@...hat.com, stefanha@...hat.com, eperezma@...hat.com,
        virtualization@...ts.linux.dev, kvm@...r.kernel.org
Cc: alok.a.tiwari@...cle.com, darren.kenny@...cle.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] vhost-scsi: Fix check for inline_sg_cnt exceeding preallocated limit

The condition comparing ret to VHOST_SCSI_PREALLOC_SGLS was incorrect,
as ret holds the result of kstrtouint() (typically 0 on success),
not the parsed value. Update the check to use cnt, which contains the
actual user-provided value.

prevents silently accepting values exceeding the maximum inline_sg_cnt.

Fixes: bca939d5bcd0 ("vhost-scsi: Dynamically allocate scatterlists")
Signed-off-by: Alok Tiwari <alok.a.tiwari@...cle.com>
---
 drivers/vhost/scsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c
index c12a0d4e6386..8d655b2d15d9 100644
--- a/drivers/vhost/scsi.c
+++ b/drivers/vhost/scsi.c
@@ -71,7 +71,7 @@ static int vhost_scsi_set_inline_sg_cnt(const char *buf,
 	if (ret)
 		return ret;
 
-	if (ret > VHOST_SCSI_PREALLOC_SGLS) {
+	if (cnt > VHOST_SCSI_PREALLOC_SGLS) {
 		pr_err("Max inline_sg_cnt is %u\n", VHOST_SCSI_PREALLOC_SGLS);
 		return -EINVAL;
 	}
-- 
2.47.1