From 21786c7e59847b1612406ff394958f22e5b323f8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Date: Mon, 5 Oct 2020 17:27:25 +0200 Subject: [PATCH] softmmu/memory: Log invalid memory accesses MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Log invalid memory accesses with as GUEST_ERROR. This is particularly useful since commit 5d971f9e67 which reverted ("memory: accept mismatching sizes in memory_region_access_valid"). Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Michael S. Tsirkin Message-Id: <20201005152725.2143444-1-philmd@redhat.com> Signed-off-by: Laurent Vivier --- softmmu/memory.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/softmmu/memory.c b/softmmu/memory.c index fa280a19f7..403ff3abc9 100644 --- a/softmmu/memory.c +++ b/softmmu/memory.c @@ -14,6 +14,7 @@ */ #include "qemu/osdep.h" +#include "qemu/log.h" #include "qapi/error.h" #include "cpu.h" #include "exec/memory.h" @@ -1353,10 +1354,18 @@ bool memory_region_access_valid(MemoryRegion *mr, { if (mr->ops->valid.accepts && !mr->ops->valid.accepts(mr->opaque, addr, size, is_write, attrs)) { + qemu_log_mask(LOG_GUEST_ERROR, "Invalid access at addr " + "0x%" HWADDR_PRIX ", size %u, " + "region '%s', reason: rejected\n", + addr, size, memory_region_name(mr)); return false; } if (!mr->ops->valid.unaligned && (addr & (size - 1))) { + qemu_log_mask(LOG_GUEST_ERROR, "Invalid access at addr " + "0x%" HWADDR_PRIX ", size %u, " + "region '%s', reason: unaligned\n", + addr, size, memory_region_name(mr)); return false; } @@ -1367,6 +1376,13 @@ bool memory_region_access_valid(MemoryRegion *mr, if (size > mr->ops->valid.max_access_size || size < mr->ops->valid.min_access_size) { + qemu_log_mask(LOG_GUEST_ERROR, "Invalid access at addr " + "0x%" HWADDR_PRIX ", size %u, " + "region '%s', reason: invalid size " + "(min:%u max:%u)\n", + addr, size, memory_region_name(mr), + mr->ops->valid.min_access_size, + mr->ops->valid.max_access_size); return false; } return true;