From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36544) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ewm1h-0006Z8-MS for qemu-devel@nongnu.org; Fri, 16 Mar 2018 05:51:54 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ewm1d-00049x-L6 for qemu-devel@nongnu.org; Fri, 16 Mar 2018 05:51:53 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:40712 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ewm1d-000497-GW for qemu-devel@nongnu.org; Fri, 16 Mar 2018 05:51:49 -0400 From: Thomas Huth Date: Fri, 16 Mar 2018 10:51:31 +0100 Message-Id: <1521193892-15552-4-git-send-email-thuth@redhat.com> In-Reply-To: <1521193892-15552-1-git-send-email-thuth@redhat.com> References: <1521193892-15552-1-git-send-email-thuth@redhat.com> Subject: [Qemu-devel] [PATCH 3/4] hw/audio: Fix crashes when devices are used on ISA bus without DMA List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: John Snow , Gerd Hoffmann , Alexey Kardashevskiy , Eduardo Habkost , Pavel Pisa , Jason Wang , Paolo Bonzini The cs4231a, gus and sb16 sound cards crash QEMU when the user tries to instantiate them on a machine with DMA-less ISA bus (for example with "qemu-system-mips64el -M mips -device sb16"). Add proper checks to the realize functions to avoid the crashes. Signed-off-by: Thomas Huth --- hw/audio/cs4231a.c | 8 +++++++- hw/audio/gus.c | 7 ++++++- hw/audio/sb16.c | 9 +++++++-- scripts/device-crash-test | 3 --- 4 files changed, 20 insertions(+), 7 deletions(-) diff --git a/hw/audio/cs4231a.c b/hw/audio/cs4231a.c index 096e8e9..aaebec1 100644 --- a/hw/audio/cs4231a.c +++ b/hw/audio/cs4231a.c @@ -28,6 +28,7 @@ #include "hw/isa/isa.h" #include "hw/qdev.h" #include "qemu/timer.h" +#include "qapi/error.h" /* Missing features: @@ -663,8 +664,13 @@ static void cs4231a_realizefn (DeviceState *dev, Error **errp) CSState *s = CS4231A (dev); IsaDmaClass *k; - isa_init_irq (d, &s->pic, s->irq); s->isa_dma = isa_get_dma(isa_bus_from_device(d), s->dma); + if (!s->isa_dma) { + error_setg(errp, "ISA controller does not support DMA"); + return; + } + + isa_init_irq(d, &s->pic, s->irq); k = ISADMA_GET_CLASS(s->isa_dma); k->register_channel(s->isa_dma, s->dma, cs_dma_read, s); diff --git a/hw/audio/gus.c b/hw/audio/gus.c index 3e864cd..8e0b27e 100644 --- a/hw/audio/gus.c +++ b/hw/audio/gus.c @@ -241,6 +241,12 @@ static void gus_realizefn (DeviceState *dev, Error **errp) IsaDmaClass *k; struct audsettings as; + s->isa_dma = isa_get_dma(isa_bus_from_device(d), s->emu.gusdma); + if (!s->isa_dma) { + error_setg(errp, "ISA controller does not support DMA"); + return; + } + AUD_register_card ("gus", &s->card); as.freq = s->freq; @@ -272,7 +278,6 @@ static void gus_realizefn (DeviceState *dev, Error **errp) isa_register_portio_list(d, &s->portio_list2, (s->port + 0x100) & 0xf00, gus_portio_list2, s, "gus"); - s->isa_dma = isa_get_dma(isa_bus_from_device(d), s->emu.gusdma); k = ISADMA_GET_CLASS(s->isa_dma); k->register_channel(s->isa_dma, s->emu.gusdma, GUS_read_DMA, s); s->emu.himemaddr = s->himem; diff --git a/hw/audio/sb16.c b/hw/audio/sb16.c index 31de264..5a4d323 100644 --- a/hw/audio/sb16.c +++ b/hw/audio/sb16.c @@ -1371,6 +1371,13 @@ static void sb16_realizefn (DeviceState *dev, Error **errp) SB16State *s = SB16 (dev); IsaDmaClass *k; + s->isa_hdma = isa_get_dma(isa_bus_from_device(isadev), s->hdma); + s->isa_dma = isa_get_dma(isa_bus_from_device(isadev), s->dma); + if (!s->isa_dma || !s->isa_hdma) { + error_setg(errp, "ISA controller does not support DMA"); + return; + } + isa_init_irq (isadev, &s->pic, s->irq); s->mixer_regs[0x80] = magic_of_irq (s->irq); @@ -1389,11 +1396,9 @@ static void sb16_realizefn (DeviceState *dev, Error **errp) isa_register_portio_list(isadev, &s->portio_list, s->port, sb16_ioport_list, s, "sb16"); - s->isa_hdma = isa_get_dma(isa_bus_from_device(isadev), s->hdma); k = ISADMA_GET_CLASS(s->isa_hdma); k->register_channel(s->isa_hdma, s->hdma, SB_read_DMA, s); - s->isa_dma = isa_get_dma(isa_bus_from_device(isadev), s->dma); k = ISADMA_GET_CLASS(s->isa_dma); k->register_channel(s->isa_dma, s->dma, SB_read_DMA, s); diff --git a/scripts/device-crash-test b/scripts/device-crash-test index 99d20cb..8ad3f44 100755 --- a/scripts/device-crash-test +++ b/scripts/device-crash-test @@ -217,10 +217,7 @@ ERROR_WHITELIST = [ {'exitcode':-6, 'log':r"Object .* is not an instance of type generic-pc-machine", 'loglevel':logging.ERROR}, {'exitcode':-6, 'log':r"Object .* is not an instance of type e500-ccsr", 'loglevel':logging.ERROR}, {'exitcode':-6, 'log':r"vmstate_register_with_alias_id: Assertion `!se->compat \|\| se->instance_id == 0' failed", 'loglevel':logging.ERROR}, - {'exitcode':-11, 'device':'gus', 'loglevel':logging.ERROR, 'expected':True}, {'exitcode':-11, 'device':'isa-serial', 'loglevel':logging.ERROR, 'expected':True}, - {'exitcode':-11, 'device':'sb16', 'loglevel':logging.ERROR, 'expected':True}, - {'exitcode':-11, 'device':'cs4231a', 'loglevel':logging.ERROR, 'expected':True}, {'exitcode':-11, 'machine':'isapc', 'device':'.*-iommu', 'loglevel':logging.ERROR, 'expected':True}, # everything else (including SIGABRT and SIGSEGV) will be a fatal error: -- 1.8.3.1