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Blame SOURCES/kvm-ide-Fix-segfault-when-flushing-a-device-that-doesn-t.patch

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From 3272771d5dd899876eb8d7ea3af3ed1d2b2472d2 Mon Sep 17 00:00:00 2001
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From: Kevin Wolf <kwolf@redhat.com>
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Date: Wed, 10 Sep 2014 11:06:09 +0200
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Subject: [PATCH 10/12] ide: Fix segfault when flushing a device that doesn't exist
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Message-id: <1410347169-4368-4-git-send-email-kwolf@redhat.com>
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Patchwork-id: 60955
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O-Subject: [RHEL-7.1 qemu-kvm PATCH 3/3] ide: Fix segfault when flushing a device that doesn't exist
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Bugzilla: 1123372
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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RH-Acked-by: Fam Zheng <famz@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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(cherry picked from commit f7f3ff1da0c451befc8d32f977f9c352d1303f40)
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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 hw/ide/core.c    |    4 +++-
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 tests/ide-test.c |   14 ++++++++++++++
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 2 files changed, 17 insertions(+), 1 deletions(-)
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diff --git a/hw/ide/core.c b/hw/ide/core.c
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index 0313250..a2947a9 100644
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--- a/hw/ide/core.c
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+++ b/hw/ide/core.c
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@@ -810,7 +810,9 @@ static void ide_flush_cb(void *opaque, int ret)
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         }
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     }
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-    bdrv_acct_done(s->bs, &s->acct);
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+    if (s->bs) {
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+        bdrv_acct_done(s->bs, &s->acct);
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+    }
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     s->status = READY_STAT | SEEK_STAT;
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     ide_async_cmd_done(s);
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     ide_set_irq(s->bus);
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diff --git a/tests/ide-test.c b/tests/ide-test.c
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index 739d2bf..51f9239 100644
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--- a/tests/ide-test.c
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+++ b/tests/ide-test.c
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@@ -462,6 +462,19 @@ static void test_flush(void)
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     ide_test_quit();
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 }
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+static void test_flush_nodev(void)
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+{
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+    ide_test_start("");
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+
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+    /* FLUSH CACHE command on device 0*/
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+    outb(IDE_BASE + reg_device, 0);
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+    outb(IDE_BASE + reg_command, CMD_FLUSH_CACHE);
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+
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+    /* Just testing that qemu doesn't crash... */
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+
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+    ide_test_quit();
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+}
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+
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 int main(int argc, char **argv)
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 {
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     const char *arch = qtest_get_arch();
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@@ -493,6 +506,7 @@ int main(int argc, char **argv)
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     qtest_add_func("/ide/bmdma/teardown", test_bmdma_teardown);
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     qtest_add_func("/ide/flush", test_flush);
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+    qtest_add_func("/ide/flush_nodev", test_flush_nodev);
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     ret = g_test_run();
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-- 
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1.7.1
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