|
 |
77c23f |
From 8ce8ccc2a22798a89bac06a37427c3a3cea91a62 Mon Sep 17 00:00:00 2001
|
|
|
77c23f |
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
|
|
|
77c23f |
Date: Tue, 5 May 2020 16:35:54 +0100
|
|
|
77c23f |
Subject: [PATCH 3/9] tools/virtiofsd/passthrough_ll: Fix double close()
|
|
|
77c23f |
MIME-Version: 1.0
|
|
|
77c23f |
Content-Type: text/plain; charset=UTF-8
|
|
|
77c23f |
Content-Transfer-Encoding: 8bit
|
|
|
77c23f |
|
|
|
77c23f |
RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
|
|
|
77c23f |
Message-id: <20200505163600.22956-2-dgilbert@redhat.com>
|
|
|
77c23f |
Patchwork-id: 96269
|
|
|
77c23f |
O-Subject: [RHEL-AV-8.2.1 qemu-kvm PATCH 1/7] tools/virtiofsd/passthrough_ll: Fix double close()
|
|
|
77c23f |
Bugzilla: 1817445
|
|
|
77c23f |
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
|
77c23f |
RH-Acked-by: Max Reitz <mreitz@redhat.com>
|
|
|
77c23f |
RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
|
|
|
77c23f |
RH-Acked-by: Michael S. Tsirkin <mst@redhat.com>
|
|
|
77c23f |
|
|
|
77c23f |
From: Philippe Mathieu-Daudé <philmd@redhat.com>
|
|
|
77c23f |
|
|
|
77c23f |
On success, the fdopendir() call closes fd. Later on the error
|
|
|
77c23f |
path we try to close an already-closed fd. This can lead to
|
|
|
77c23f |
use-after-free. Fix by only closing the fd if the fdopendir()
|
|
|
77c23f |
call failed.
|
|
|
77c23f |
|
|
|
77c23f |
Cc: qemu-stable@nongnu.org
|
|
|
77c23f |
Fixes: b39bce121b (add dirp_map to hide lo_dirp pointers)
|
|
|
77c23f |
Reported-by: Coverity (CID 1421933 USE_AFTER_FREE)
|
|
|
77c23f |
Suggested-by: Peter Maydell <peter.maydell@linaro.org>
|
|
|
77c23f |
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
|
|
|
77c23f |
Message-Id: <20200321120654.7985-1-philmd@redhat.com>
|
|
|
77c23f |
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
|
77c23f |
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
|
|
|
77c23f |
(cherry picked from commit e1cd92d95cd4f97b3464c4e08cd5b22bf5ca05cb)
|
|
|
77c23f |
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
|
|
|
77c23f |
---
|
|
|
77c23f |
tools/virtiofsd/passthrough_ll.c | 3 +--
|
|
|
77c23f |
1 file changed, 1 insertion(+), 2 deletions(-)
|
|
|
77c23f |
|
|
|
77c23f |
diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
|
|
|
77c23f |
index 9cba3f1..50ff672 100644
|
|
|
77c23f |
--- a/tools/virtiofsd/passthrough_ll.c
|
|
|
77c23f |
+++ b/tools/virtiofsd/passthrough_ll.c
|
|
|
77c23f |
@@ -1524,8 +1524,7 @@ out_err:
|
|
|
77c23f |
if (d) {
|
|
|
77c23f |
if (d->dp) {
|
|
|
77c23f |
closedir(d->dp);
|
|
|
77c23f |
- }
|
|
|
77c23f |
- if (fd != -1) {
|
|
|
77c23f |
+ } else if (fd != -1) {
|
|
|
77c23f |
close(fd);
|
|
|
77c23f |
}
|
|
|
77c23f |
free(d);
|
|
|
77c23f |
--
|
|
|
77c23f |
1.8.3.1
|
|
|
77c23f |
|