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From 4fbb16d71e7e9a893c665926642122b165c63425 Mon Sep 17 00:00:00 2001
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From: John Snow <jsnow@redhat.com>
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Date: Wed, 26 Apr 2017 23:49:07 +0200
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Subject: [PATCH] ide: fix halted IO segfault at reset
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RH-Author: John Snow <jsnow@redhat.com>
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Message-id: <20170426234907.21151-2-jsnow@redhat.com>
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Patchwork-id: 74905
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O-Subject: [RHEL-7.4 qemu-kvm PATCH v2 1/1] ide: fix halted IO segfault at reset
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Bugzilla: 1299875
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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RH-Acked-by: Markus Armbruster <armbru@redhat.com>
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If one attempts to perform a system_reset after a failed IO request
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that causes the VM to enter a paused state, QEMU will segfault trying
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to free up the pending IO requests.
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These requests have already been completed and freed, though, so all
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we need to do is NULL them before we enter the paused state.
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Existing AHCI tests verify that halted requests are still resumed
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successfully after a STOP event.
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Analyzed-by: Laszlo Ersek <lersek@redhat.com>
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Reviewed-by: Laszlo Ersek <lersek@redhat.com>
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Signed-off-by: John Snow <jsnow@redhat.com>
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Message-id: 1469635201-11918-2-git-send-email-jsnow@redhat.com
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Signed-off-by: John Snow <jsnow@redhat.com>
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(cherry picked from commit 87ac25fd1fed05a30a93d27dbeb2a4c4b83ec95f)
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Signed-off-by: John Snow <jsnow@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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Conflicts:
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hw/ide/core.c: Context and formatting of handle_rw_error
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---
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hw/ide/core.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/hw/ide/core.c b/hw/ide/core.c
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index 5d40093..5c33735 100644
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--- a/hw/ide/core.c
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+++ b/hw/ide/core.c
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@@ -658,6 +658,7 @@ void ide_dma_cb(void *opaque, int ret)
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op |= BM_STATUS_RETRY_TRIM;
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if (ide_handle_rw_error(s, -ret, op)) {
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+ s->bus->dma->aiocb = NULL;
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return;
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}
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}
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--
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1.8.3.1
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