From: "Philippe Mathieu-Daudé" <philmd@linaro.org>
To: "Philippe Mathieu-Daudé" <philmd@redhat.com>, qemu-devel@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>,
"Michael S. Tsirkin" <mst@redhat.com>,
Jason Wang <jasowang@redhat.com>,
Christian Schoenebeck <qemu_oss@crudebyte.com>,
Gerd Hoffmann <kraxel@redhat.com>, Eric Blake <eblake@redhat.com>,
qemu-block@nongnu.org, David Hildenbrand <david@redhat.com>,
Markus Armbruster <armbru@redhat.com>,
Marcel Apfelbaum <marcel.apfelbaum@gmail.com>,
Laurent Vivier <lvivier@redhat.com>,
Thomas Huth <thuth@redhat.com>,
Eduardo Habkost <ehabkost@redhat.com>,
Richard Henderson <richard.henderson@linaro.org>,
qemu-arm@nongnu.org, John Snow <jsnow@redhat.com>,
David Gibson <david@gibson.dropbear.id.au>,
Kevin Wolf <kwolf@redhat.com>,
Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>,
"Daniel P . Berrange" <berrange@redhat.com>,
Hanna Reitz <hreitz@redhat.com>,
qemu-ppc@nongnu.org, Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [PATCH v3 00/28] glib: Replace g_memdup() by g_memdup2()
Date: Wed, 8 May 2024 23:22:27 +0200 [thread overview]
Message-ID: <d38663b0-2f6f-4400-a590-aff76982df05@linaro.org> (raw)
In-Reply-To: <20210903174510.751630-1-philmd@redhat.com>
On 3/9/21 19:44, Philippe Mathieu-Daudé wrote:
> Per https://discourse.gnome.org/t/port-your-module-from-g-memdup-to-g-memdup2-now/5538
>
> The old API took the size of the memory to duplicate as a guint,
> whereas most memory functions take memory sizes as a gsize. This
> made it easy to accidentally pass a gsize to g_memdup(). For large
> values, that would lead to a silent truncation of the size from 64
> to 32 bits, and result in a heap area being returned which is
> significantly smaller than what the caller expects. This can likely
> be exploited in various modules to cause a heap buffer overflow.
>
> g_memdup() as been deprecated in GLib 2.68. Since QEMU defines
> GLIB_VERSION_MAX_ALLOWED to GLIB_VERSION_2_56, the deprecation
> is not displayed (on GLib >= 2.68 such available on Fedora 34).
> However the function is still unsafe, so it is better to avoid
> its use.
>
> This series provides the safely equivalent g_memdup2() wrapper,
> and replace all g_memdup() calls by it.
> Philippe Mathieu-Daudé (28):
> block/qcow2-bitmap: Replace g_memdup() by g_memdup2()
> hw/hppa/machine: Replace g_memdup() by g_memdup2()
> hw/ppc/spapr_pci: Replace g_memdup() by g_memdup2()
> target/ppc: Replace g_memdup() by g_memdup2()
Thanks, patches 5, 11, 15 & 26 queued to hw-misc tree
adding the comment suggested by Eric on patch 5.
prev parent reply other threads:[~2024-05-08 21:23 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-03 17:44 [PATCH v3 00/28] glib: Replace g_memdup() by g_memdup2() Philippe Mathieu-Daudé
2021-09-03 17:44 ` [PATCH v3 01/28] hw/hyperv/vmbus: Remove unused vmbus_load/save_req() Philippe Mathieu-Daudé
2021-09-03 17:44 ` [PATCH v3 02/28] glib-compat: Introduce g_memdup2() wrapper Philippe Mathieu-Daudé
2021-09-03 20:37 ` Eric Blake
2021-12-16 14:11 ` Alex Bennée
2021-12-16 18:39 ` Philippe Mathieu-Daudé
2021-12-17 11:10 ` Alex Bennée
2021-12-17 11:41 ` Laurent Vivier
2021-12-17 12:15 ` Alex Bennée
2021-12-17 13:39 ` Daniel P. Berrangé
2021-12-17 13:43 ` Daniel P. Berrangé
2021-12-17 14:53 ` Alex Bennée
2021-12-17 15:01 ` Daniel P. Berrangé
2021-12-17 10:55 ` Laurent Vivier
2021-09-03 17:44 ` [PATCH v3 03/28] qapi: Replace g_memdup() by g_memdup2() Philippe Mathieu-Daudé
2021-09-03 21:10 ` Eric Blake
2021-09-03 17:44 ` [PATCH v3 04/28] accel/tcg: " Philippe Mathieu-Daudé
2021-09-03 17:44 ` [PATCH v3 05/28] block/qcow2-bitmap: " Philippe Mathieu-Daudé
2021-09-03 21:13 ` Eric Blake
2021-09-03 21:14 ` Philippe Mathieu-Daudé
2021-09-03 17:44 ` [PATCH v3 06/28] softmmu: " Philippe Mathieu-Daudé
2021-09-03 17:44 ` [PATCH v3 07/28] hw/9pfs: " Philippe Mathieu-Daudé
2021-09-04 12:25 ` Christian Schoenebeck
2021-09-03 17:44 ` [PATCH v3 08/28] hw/acpi: Avoid truncating acpi_data_len() to 32-bit Philippe Mathieu-Daudé
2021-09-03 17:44 ` [PATCH v3 09/28] hw/acpi: Replace g_memdup() by g_memdup2() Philippe Mathieu-Daudé
2021-09-03 17:44 ` [PATCH v3 10/28] hw/core/machine: " Philippe Mathieu-Daudé
2021-09-03 17:44 ` [PATCH v3 11/28] hw/hppa/machine: " Philippe Mathieu-Daudé
2021-09-03 17:44 ` [PATCH v3 12/28] hw/i386/multiboot: " Philippe Mathieu-Daudé
2021-09-03 17:44 ` [PATCH v3 13/28] hw/net/eepro100: " Philippe Mathieu-Daudé
2021-09-03 17:44 ` [PATCH v3 14/28] hw/nvram/fw_cfg: " Philippe Mathieu-Daudé
2021-09-03 17:44 ` [PATCH v3 15/28] hw/scsi/mptsas: " Philippe Mathieu-Daudé
2021-09-03 17:44 ` [PATCH v3 16/28] hw/ppc/spapr_pci: " Philippe Mathieu-Daudé
2021-09-04 3:38 ` David Gibson
2021-09-03 17:44 ` [PATCH v3 17/28] hw/rdma: " Philippe Mathieu-Daudé
2021-09-03 17:45 ` [PATCH v3 18/28] hw/vfio/pci: " Philippe Mathieu-Daudé
2021-09-03 17:45 ` [RFC PATCH v3 19/28] hw/virtio: " Philippe Mathieu-Daudé
2022-04-01 10:50 ` Eugenio Perez Martin
2021-09-03 17:45 ` [PATCH v3 20/28] net/colo: " Philippe Mathieu-Daudé
2021-09-03 17:45 ` [RFC PATCH v3 21/28] ui/clipboard: " Philippe Mathieu-Daudé
2021-09-03 17:45 ` [RFC PATCH v3 22/28] linux-user: " Philippe Mathieu-Daudé
2021-09-03 17:45 ` [PATCH v3 23/28] tests/unit: " Philippe Mathieu-Daudé
2021-09-03 17:45 ` [PATCH v3 24/28] tests/qtest: " Philippe Mathieu-Daudé
2021-09-04 5:48 ` Thomas Huth
2021-12-17 10:56 ` Laurent Vivier
2021-09-03 17:45 ` [PATCH v3 25/28] target/arm: " Philippe Mathieu-Daudé
2021-09-03 17:45 ` [PATCH v3 26/28] target/ppc: " Philippe Mathieu-Daudé
2021-09-04 3:38 ` David Gibson
2021-09-03 17:45 ` [PATCH v3 27/28] contrib: " Philippe Mathieu-Daudé
2021-09-03 17:45 ` [PATCH v3 28/28] checkpatch: Do not allow deprecated g_memdup() Philippe Mathieu-Daudé
2021-09-03 21:17 ` Eric Blake
2021-12-17 10:58 ` Laurent Vivier
2021-12-15 16:54 ` [PATCH v3 00/28] glib: Replace g_memdup() by g_memdup2() Philippe Mathieu-Daudé
2021-12-17 10:59 ` Laurent Vivier
2024-05-08 21:22 ` Philippe Mathieu-Daudé [this message]
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