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vhost-scsi: Fix check for inline_sg_cnt exceeding preallocated limit

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[ Upstream commit 400cad513c ]

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: bca939d5bc ("vhost-scsi: Dynamically allocate scatterlists")
Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20250628183405.3979538-1-alok.a.tiwari@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alok Tiwari 2025-06-28 11:33:53 -07:00 committed by Greg Kroah-Hartman
parent 648a5d7928
commit b028d38c6c
1 changed files with 1 additions and 1 deletions
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2
drivers/vhost/scsi.c
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@ -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;
}