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From: Greg Kurz <groug@kaod.org>
To: qemu-devel@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
	Greg Kurz <groug@kaod.org>, Paolo Bonzini <pbonzini@redhat.com>
Subject: [Qemu-devel] [PULL 01/31] 9pfs: fix v9fs_lock error case
Date: Mon, 27 Feb 2017 23:59:51 +0100	[thread overview]
Message-ID: <1488236421-30983-2-git-send-email-groug@kaod.org> (raw)
In-Reply-To: <1488236421-30983-1-git-send-email-groug@kaod.org>

From: Paolo Bonzini <pbonzini@redhat.com>

In this case, we are marshaling an error status instead of the errno value.
Reorganize the out and out_nofid labels to look like all the other cases.
Coverity reports this because the "err = -ENOENT" and "err = -EINVAL"
assignments above are dead, overwritten by the call to pdu_marshal.

(Coverity issues CID1348512 and CID1348513)

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(also open-coded the success path since locking is a nop for us, Greg Kurz)
Signed-off-by: Greg Kurz <groug@kaod.org>
---
 hw/9pfs/9p.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c
index 3af1c93dc87d..d99abc46025e 100644
--- a/hw/9pfs/9p.c
+++ b/hw/9pfs/9p.c
@@ -3010,7 +3010,6 @@ out_nofid:
  */
 static void coroutine_fn v9fs_lock(void *opaque)
 {
-    int8_t status;
     V9fsFlock flock;
     size_t offset = 7;
     struct stat stbuf;
@@ -3018,7 +3017,6 @@ static void coroutine_fn v9fs_lock(void *opaque)
     int32_t fid, err = 0;
     V9fsPDU *pdu = opaque;
 
-    status = P9_LOCK_ERROR;
     v9fs_string_init(&flock.client_id);
     err = pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock.type,
                         &flock.flags, &flock.start, &flock.length,
@@ -3044,15 +3042,15 @@ static void coroutine_fn v9fs_lock(void *opaque)
     if (err < 0) {
         goto out;
     }
-    status = P9_LOCK_SUCCESS;
+    err = pdu_marshal(pdu, offset, "b", P9_LOCK_SUCCESS);
+    if (err < 0) {
+        goto out;
+    }
+    err += offset;
+    trace_v9fs_lock_return(pdu->tag, pdu->id, P9_LOCK_SUCCESS);
 out:
     put_fid(pdu, fidp);
 out_nofid:
-    err = pdu_marshal(pdu, offset, "b", status);
-    if (err > 0) {
-        err += offset;
-    }
-    trace_v9fs_lock_return(pdu->tag, pdu->id, status);
     pdu_complete(pdu, err);
     v9fs_string_free(&flock.client_id);
 }
-- 
2.7.4

  reply	other threads:[~2017-02-27 23:00 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-27 22:59 [Qemu-devel] [PULL 00/31] 9p patches 2017-02-27 for 2.9 soft freeze Greg Kurz
2017-02-27 22:59 ` Greg Kurz [this message]
2017-02-27 22:59 ` [Qemu-devel] [PULL 02/31] fsdev: add IO throttle support to fsdev devices Greg Kurz
2017-02-27 22:59 ` [Qemu-devel] [PULL 03/31] throttle: factor out duplicate code Greg Kurz
2017-02-27 22:59 ` [Qemu-devel] [PULL 04/31] 9pfs: local: move xattr security ops to 9p-xattr.c Greg Kurz
2017-02-27 22:59 ` [Qemu-devel] [PULL 05/31] 9pfs: remove side-effects in local_init() Greg Kurz
2017-02-27 22:59 ` [Qemu-devel] [PULL 06/31] 9pfs: remove side-effects in local_open() and local_opendir() Greg Kurz
2017-02-27 22:59 ` [Qemu-devel] [PULL 07/31] 9pfs: introduce relative_openat_nofollow() helper Greg Kurz
2017-02-27 23:37   ` Eric Blake
2017-02-28  0:33     ` Greg Kurz
2017-02-27 22:59 ` [Qemu-devel] [PULL 08/31] 9pfs: local: keep a file descriptor on the shared folder Greg Kurz
2017-02-27 22:59 ` [Qemu-devel] [PULL 09/31] 9pfs: local: open/opendir: don't follow symlinks Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 10/31] 9pfs: local: lgetxattr: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 11/31] 9pfs: local: llistxattr: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 12/31] 9pfs: local: lsetxattr: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 13/31] 9pfs: local: lremovexattr: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 14/31] 9pfs: local: unlinkat: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 15/31] 9pfs: local: remove: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 16/31] 9pfs: local: utimensat: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 17/31] 9pfs: local: statfs: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 18/31] 9pfs: local: truncate: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 19/31] 9pfs: local: readlink: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 20/31] 9pfs: local: lstat: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 21/31] 9pfs: local: renameat: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 22/31] 9pfs: local: rename: use renameat Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 23/31] 9pfs: local: improve error handling in link op Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 24/31] 9pfs: local: link: don't follow symlinks Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 25/31] 9pfs: local: chmod: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 26/31] 9pfs: local: chown: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 27/31] 9pfs: local: symlink: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 28/31] 9pfs: local: mknod: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 29/31] 9pfs: local: mkdir: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 30/31] 9pfs: local: open2: " Greg Kurz
2017-02-27 23:00 ` [Qemu-devel] [PULL 31/31] 9pfs: local: drop unused code Greg Kurz
2017-02-27 23:41 ` [Qemu-devel] [PULL 00/31] 9p patches 2017-02-27 for 2.9 soft freeze no-reply
2017-02-28  0:00 ` no-reply
2017-02-28  0:36   ` Greg Kurz
2017-02-28  0:37 ` Greg Kurz
2017-02-28  5:58   ` Michael Tokarev
2017-02-28  7:31     ` Greg Kurz

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