9b71f5aa79
hw/scsi/lsi53c895a: Do not abort when DMA requested and no data queued tests/qtest: Add fuzz-lsi53c895a-test scsi/lsi53c895a: fix use-after-free in lsi_do_msgout (CVE-2022-0216) scsi/lsi53c895a: really fix use-after-free in lsi_do_msgout (CVE-2022-0216) Signed-off-by: yezengruan <yezengruan@huawei.com>
38 lines
1.4 KiB
Diff
38 lines
1.4 KiB
Diff
From 87d97af840d61122e801a37a89e6bf48a2cbe8e2 Mon Sep 17 00:00:00 2001
|
|
From: Mauro Matteo Cascella <mcascell@redhat.com>
|
|
Date: Tue, 5 Jul 2022 22:05:43 +0200
|
|
Subject: [PATCH 3/4] scsi/lsi53c895a: fix use-after-free in lsi_do_msgout
|
|
(CVE-2022-0216)
|
|
|
|
Set current_req->req to NULL to prevent reusing a free'd buffer in case of
|
|
repeated SCSI cancel requests. Thanks to Thomas Huth for suggesting the patch.
|
|
|
|
Fixes: CVE-2022-0216
|
|
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/972
|
|
Signed-off-by: Mauro Matteo Cascella <mcascell@redhat.com>
|
|
Reviewed-by: Thomas Huth <thuth@redhat.com>
|
|
Message-Id: <20220705200543.2366809-1-mcascell@redhat.com>
|
|
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
|
|
---
|
|
hw/scsi/lsi53c895a.c | 3 ++-
|
|
1 file changed, 2 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c
|
|
index 4c431adb77..4c91854df9 100644
|
|
--- a/hw/scsi/lsi53c895a.c
|
|
+++ b/hw/scsi/lsi53c895a.c
|
|
@@ -1028,8 +1028,9 @@ static void lsi_do_msgout(LSIState *s)
|
|
case 0x0d:
|
|
/* The ABORT TAG message clears the current I/O process only. */
|
|
trace_lsi_do_msgout_abort(current_tag);
|
|
- if (current_req) {
|
|
+ if (current_req && current_req->req) {
|
|
scsi_req_cancel(current_req->req);
|
|
+ current_req->req = NULL;
|
|
}
|
|
lsi_disconnect(s);
|
|
break;
|
|
--
|
|
2.27.0
|
|
|