From: Laurent Vivier <laurent@vivier.eu>
To: "Philippe Mathieu-Daudé" <philmd@redhat.com>, qemu-devel@nongnu.org
Cc: qemu-trivial@nongnu.org, Peter Maydell <peter.maydell@linaro.org>,
"Michael S . Tsirkin" <mst@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [PATCH] softmmu/memory: Log invalid memory accesses
Date: Mon, 12 Oct 2020 16:20:43 +0200 [thread overview]
Message-ID: <a28bffcf-dcb8-b5d2-5fe9-d9fd19515d08@vivier.eu> (raw)
In-Reply-To: <20201005152725.2143444-1-philmd@redhat.com>
Le 05/10/2020 à 17:27, Philippe Mathieu-Daudé a écrit :
> 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 <philmd@redhat.com>
> ---
> 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;
>
Applied to my trivial-patches branch.
Thanks,
Laurent
prev parent reply other threads:[~2020-10-12 14:22 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-05 15:27 [PATCH] softmmu/memory: Log invalid memory accesses Philippe Mathieu-Daudé
2020-10-05 17:57 ` Michael S. Tsirkin
2020-10-05 18:11 ` Philippe Mathieu-Daudé
2020-10-12 14:20 ` Laurent Vivier [this message]
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