[PATCH][next] scsi: sg: Fix use of pointer sfp after it has been kfree'd
From: Colin King
Date: Thu Mar 11 2021 - 05:38:24 EST
From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Currently SG_LOG is referencing sfp after it has been kfree'd which
is probably a bad thing to do. Fix this by kfree'ing sfp after
SG_LOG.
Addresses-Coverity: ("Use after free")
Fixes: af1fc95db445 ("scsi: sg: Replace rq array with xarray")
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
---
drivers/scsi/sg.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 2d4bbc1a1727..79f05afa4407 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -3799,10 +3799,10 @@ sg_add_sfp(struct sg_device *sdp)
if (rbuf_len > 0) {
srp = sg_build_reserve(sfp, rbuf_len);
if (IS_ERR(srp)) {
- kfree(sfp);
err = PTR_ERR(srp);
SG_LOG(1, sfp, "%s: build reserve err=%ld\n", __func__,
-err);
+ kfree(sfp);
return ERR_PTR(err);
}
if (srp->sgat_h.buflen < rbuf_len) {
--
2.30.2