From e954ea2873fd6621d199d4a1a012fc0bc0292924 Mon Sep 17 00:00:00 2001 From: Alon Levy Date: Wed, 25 Apr 2012 12:13:24 +0300 Subject: qxl: qxl_add_memslot: remove guest trigerrable panics Signed-off-by: Alon Levy Signed-off-by: Gerd Hoffmann --- hw/qxl.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) (limited to 'hw') diff --git a/hw/qxl.c b/hw/qxl.c index 44ee49583f..44a167afb7 100644 --- a/hw/qxl.c +++ b/hw/qxl.c @@ -1038,8 +1038,8 @@ static const MemoryRegionPortio qxl_vga_portio_list[] = { PORTIO_END_OF_LIST(), }; -static void qxl_add_memslot(PCIQXLDevice *d, uint32_t slot_id, uint64_t delta, - qxl_async_io async) +static int qxl_add_memslot(PCIQXLDevice *d, uint32_t slot_id, uint64_t delta, + qxl_async_io async) { static const int regions[] = { QXL_RAM_RANGE_INDEX, @@ -1060,8 +1060,16 @@ static void qxl_add_memslot(PCIQXLDevice *d, uint32_t slot_id, uint64_t delta, trace_qxl_memslot_add_guest(d->id, slot_id, guest_start, guest_end); - PANIC_ON(slot_id >= NUM_MEMSLOTS); - PANIC_ON(guest_start > guest_end); + if (slot_id >= NUM_MEMSLOTS) { + qxl_guest_bug(d, "%s: slot_id >= NUM_MEMSLOTS %d >= %d", __func__, + slot_id, NUM_MEMSLOTS); + return 1; + } + if (guest_start > guest_end) { + qxl_guest_bug(d, "%s: guest_start > guest_end 0x%" PRIx64 + " > 0x%" PRIx64, __func__, guest_start, guest_end); + return 1; + } for (i = 0; i < ARRAY_SIZE(regions); i++) { pci_region = regions[i]; @@ -1082,7 +1090,10 @@ static void qxl_add_memslot(PCIQXLDevice *d, uint32_t slot_id, uint64_t delta, /* passed */ break; } - PANIC_ON(i == ARRAY_SIZE(regions)); /* finished loop without match */ + if (i == ARRAY_SIZE(regions)) { + qxl_guest_bug(d, "%s: finished loop without match", __func__); + return 1; + } switch (pci_region) { case QXL_RAM_RANGE_INDEX: @@ -1094,7 +1105,8 @@ static void qxl_add_memslot(PCIQXLDevice *d, uint32_t slot_id, uint64_t delta, break; default: /* should not happen */ - abort(); + qxl_guest_bug(d, "%s: pci_region = %d", __func__, pci_region); + return 1; } memslot.slot_id = slot_id; @@ -1110,6 +1122,7 @@ static void qxl_add_memslot(PCIQXLDevice *d, uint32_t slot_id, uint64_t delta, d->guest_slots[slot_id].size = memslot.virt_end - memslot.virt_start; d->guest_slots[slot_id].delta = delta; d->guest_slots[slot_id].active = 1; + return 0; } static void qxl_del_memslot(PCIQXLDevice *d, uint32_t slot_id) @@ -1250,7 +1263,7 @@ static void qxl_set_mode(PCIQXLDevice *d, int modenr, int loadvm) } d->guest_slots[0].slot = slot; - qxl_add_memslot(d, 0, devmem, QXL_SYNC); + assert(qxl_add_memslot(d, 0, devmem, QXL_SYNC) == 0); d->guest_primary.surface = surface; qxl_create_guest_primary(d, 0, QXL_SYNC); -- cgit v1.2.3