From 4d3c9646213bdf992af4e28eaf0d57610eb79fec Mon Sep 17 00:00:00 2001 From: John Snow Date: Thu, 29 Sep 2016 00:02:14 +0200 Subject: [PATCH 1/3] ide: fix halted IO segfault at reset RH-Author: John Snow Message-id: <1475107334-14972-2-git-send-email-jsnow@redhat.com> Patchwork-id: 72436 O-Subject: [RHEL-7.3.z qemu-kvm PATCH 1/1] ide: fix halted IO segfault at reset Bugzilla: 1393042 RH-Acked-by: Laszlo Ersek RH-Acked-by: Paolo Bonzini RH-Acked-by: Markus Armbruster If one attempts to perform a system_reset after a failed IO request that causes the VM to enter a paused state, QEMU will segfault trying to free up the pending IO requests. These requests have already been completed and freed, though, so all we need to do is NULL them before we enter the paused state. Existing AHCI tests verify that halted requests are still resumed successfully after a STOP event. Analyzed-by: Laszlo Ersek Reviewed-by: Laszlo Ersek Signed-off-by: John Snow Message-id: 1469635201-11918-2-git-send-email-jsnow@redhat.com Signed-off-by: John Snow (cherry picked from commit 87ac25fd1fed05a30a93d27dbeb2a4c4b83ec95f) Signed-off-by: John Snow Signed-off-by: Miroslav Rezanina Conflicts: hw/ide/core.c: Context and formatting of handle_rw_error --- hw/ide/core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/hw/ide/core.c b/hw/ide/core.c index 5d40093..5c33735 100644 --- a/hw/ide/core.c +++ b/hw/ide/core.c @@ -658,6 +658,7 @@ void ide_dma_cb(void *opaque, int ret) op |= BM_STATUS_RETRY_TRIM; if (ide_handle_rw_error(s, -ret, op)) { + s->bus->dma->aiocb = NULL; return; } } -- 1.8.3.1