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From 792e58622d0a5c0015673e2929c89b4bd36ef008 Mon Sep 17 00:00:00 2001
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Message-Id: <792e58622d0a5c0015673e2929c89b4bd36ef008.1387288155.git.minovotn@redhat.com>
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In-Reply-To: <527da6c2ce2c09d0183aa8595fc95f136f61b6df.1387288155.git.minovotn@redhat.com>
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References: <527da6c2ce2c09d0183aa8595fc95f136f61b6df.1387288155.git.minovotn@redhat.com>
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From: Stefan Hajnoczi <stefanha@redhat.com>
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Date: Thu, 12 Dec 2013 16:21:23 +0100
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Subject: [PATCH 3/8] blockdev: fix drive_init() opts and bs_opts leaks
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RH-Author: Stefan Hajnoczi <stefanha@redhat.com>
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Message-id: <1386865288-1575-4-git-send-email-stefanha@redhat.com>
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Patchwork-id: 56257
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O-Subject: [RHEL7 qemu-kvm PATCH 3/8] blockdev: fix drive_init() opts and bs_opts leaks
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Bugzilla: 1003773
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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RH-Acked-by: Jeffrey Cody <jcody@redhat.com>
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RH-Acked-by: Markus Armbruster <armbru@redhat.com>
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These memory leaks also make drive_add if=none,id=drive0 without a file=
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option leak the options list.  This keeps ID "drive0" around forever.
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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(cherry picked from commit ec9c10d29c6bb5613a680af62f5825d3bb2d31d4)
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Conflicts:
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	blockdev.c
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s/bdrv_delete/bdrv_unref/ upstream has resulted in a trivial conflict.
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---
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 blockdev.c | 27 +++++++++++++++------------
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 1 file changed, 15 insertions(+), 12 deletions(-)
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Signed-off-by: Michal Novotny <minovotn@redhat.com>
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---
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 blockdev.c | 27 +++++++++++++++------------
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 1 file changed, 15 insertions(+), 12 deletions(-)
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diff --git a/blockdev.c b/blockdev.c
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index cdd453a..f6d607c 100644
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--- a/blockdev.c
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+++ b/blockdev.c
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@@ -360,7 +360,7 @@ static DriveInfo *blockdev_init(QDict *bs_opts,
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     qemu_opts_absorb_qdict(opts, bs_opts, &error);
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     if (error_is_set(&error)) {
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         error_propagate(errp, error);
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-        return NULL;
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+        goto early_err;
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     }
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     if (id) {
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@@ -380,7 +380,7 @@ static DriveInfo *blockdev_init(QDict *bs_opts,
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     if ((buf = qemu_opt_get(opts, "discard")) != NULL) {
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         if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) {
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             error_setg(errp, "invalid discard option");
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-            return NULL;
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+            goto early_err;
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         }
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     }
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@@ -402,7 +402,7 @@ static DriveInfo *blockdev_init(QDict *bs_opts,
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             /* this is the default */
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         } else {
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            error_setg(errp, "invalid aio option");
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-           return NULL;
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+           goto early_err;
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         }
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     }
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 #endif
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@@ -412,13 +412,13 @@ static DriveInfo *blockdev_init(QDict *bs_opts,
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             error_printf("Supported formats:");
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             bdrv_iterate_format(bdrv_format_print, NULL);
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             error_printf("\n");
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-            return NULL;
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+            goto early_err;
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         }
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         drv = bdrv_find_whitelisted_format(buf, ro);
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         if (!drv) {
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             error_setg(errp, "'%s' invalid format", buf);
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-            return NULL;
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+            goto early_err;
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         }
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     }
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@@ -438,20 +438,20 @@ static DriveInfo *blockdev_init(QDict *bs_opts,
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     if (!do_check_io_limits(&io_limits, &error)) {
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         error_propagate(errp, error);
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-        return NULL;
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+        goto early_err;
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     }
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     on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
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     if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
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         if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
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             error_setg(errp, "werror is not supported by this bus type");
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-            return NULL;
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+            goto early_err;
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         }
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         on_write_error = parse_block_error_action(buf, 0, &error);
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         if (error_is_set(&error)) {
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             error_propagate(errp, error);
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-            return NULL;
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+            goto early_err;
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         }
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     }
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@@ -459,13 +459,13 @@ static DriveInfo *blockdev_init(QDict *bs_opts,
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     if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
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         if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
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             error_report("rerror is not supported by this bus type");
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-            return NULL;
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+            goto early_err;
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         }
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         on_read_error = parse_block_error_action(buf, 1, &error);
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         if (error_is_set(&error)) {
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             error_propagate(errp, error);
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-            return NULL;
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+            goto early_err;
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         }
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     }
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@@ -491,6 +491,8 @@ static DriveInfo *blockdev_init(QDict *bs_opts,
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         if (has_driver_specific_opts) {
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             file = NULL;
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         } else {
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+            QDECREF(bs_opts);
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+            qemu_opts_del(opts);
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             return dinfo;
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         }
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     }
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@@ -529,12 +531,13 @@ static DriveInfo *blockdev_init(QDict *bs_opts,
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     return dinfo;
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 err:
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-    qemu_opts_del(opts);
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-    QDECREF(bs_opts);
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     bdrv_delete(dinfo->bdrv);
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     g_free(dinfo->id);
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     QTAILQ_REMOVE(&drives, dinfo, next);
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     g_free(dinfo);
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+early_err:
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+    QDECREF(bs_opts);
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+    qemu_opts_del(opts);
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     return NULL;
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 }
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-- 
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1.7.11.7
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