On 1/9/2022 8:17 AM, Juan Vazquez wrote:
Fix possible memory leak in error path of storvsc_queuecommand() when
DMA mapping fails.
Fixes: 743b237c3a7b ("scsi: storvsc: Add Isolation VM support for storvsc driver")
Signed-off-by: Juan Vazquez <juvazq@xxxxxxxxxxxxxxxxxxx>
Looks good. Thanks for the fix patch.
Reviewed-by: Tianyu Lan <Tianyu.Lan@xxxxxxxxxxxxx>
---
drivers/scsi/storvsc_drv.c | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 2273b843d9d2..9a0bba5a51a7 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -1850,8 +1850,10 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd)
payload->range.offset = offset_in_hvpg;
sg_count = scsi_dma_map(scmnd);
- if (sg_count < 0)
- return SCSI_MLQUEUE_DEVICE_BUSY;
+ if (sg_count < 0) {
+ ret = SCSI_MLQUEUE_DEVICE_BUSY;
+ goto err_free_payload;
+ }
for_each_sg(sgl, sg, sg_count, j) {
/*
@@ -1886,13 +1888,18 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd)
put_cpu();
if (ret == -EAGAIN) {
- if (payload_sz > sizeof(cmd_request->mpb))
- kfree(payload);
/* no more space */
- return SCSI_MLQUEUE_DEVICE_BUSY;
+ ret = SCSI_MLQUEUE_DEVICE_BUSY;
+ goto err_free_payload;
}
return 0;
+
+err_free_payload:
+ if (payload_sz > sizeof(cmd_request->mpb))
+ kfree(payload);
+
+ return ret;
}
static struct scsi_host_template scsi_driver = {
