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[PATCH 18/28] hw/vfio/pci: Replace g_memdup() by g_memdup2_qemu()
From: |
Philippe Mathieu-Daudé |
Subject: |
[PATCH 18/28] hw/vfio/pci: Replace g_memdup() by g_memdup2_qemu() |
Date: |
Fri, 3 Sep 2021 13:06:52 +0200 |
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.
Replace g_memdup() by the safer g_memdup2_qemu() wrapper.
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
hw/vfio/pci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index e1ea1d8a23b..5c9acfd9c40 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -2040,7 +2040,7 @@ static void vfio_add_ext_cap(VFIOPCIDevice *vdev)
* physical device, we cache the config space to avoid overwriting
* the original config space when we parse the extended capabilities.
*/
- config = g_memdup(pdev->config, vdev->config_size);
+ config = g_memdup2_qemu(pdev->config, vdev->config_size);
/*
* Extended capabilities are chained with each pointing to the next, so we
--
2.31.1
- [PATCH 08/28] hw/acpi: Avoid truncating acpi_data_len() to 32-bit, (continued)
- [PATCH 08/28] hw/acpi: Avoid truncating acpi_data_len() to 32-bit, Philippe Mathieu-Daudé, 2021/09/03
- [PATCH 09/28] hw/acpi: Replace g_memdup() by g_memdup2_qemu(), Philippe Mathieu-Daudé, 2021/09/03
- [PATCH 10/28] hw/core/machine: Replace g_memdup() by g_memdup2_qemu(), Philippe Mathieu-Daudé, 2021/09/03
- [PATCH 11/28] hw/hppa/machine: Replace g_memdup() by g_memdup2_qemu(), Philippe Mathieu-Daudé, 2021/09/03
- [PATCH 12/28] hw/i386/multiboot: Replace g_memdup() by g_memdup2_qemu(), Philippe Mathieu-Daudé, 2021/09/03
- [PATCH 14/28] hw/nvram/fw_cfg: Replace g_memdup() by g_memdup2_qemu(), Philippe Mathieu-Daudé, 2021/09/03
- [PATCH 16/28] hw/ppc/spapr_pci: Replace g_memdup() by g_memdup2_qemu(), Philippe Mathieu-Daudé, 2021/09/03
- [PATCH 18/28] hw/vfio/pci: Replace g_memdup() by g_memdup2_qemu(),
Philippe Mathieu-Daudé <=
- [RFC PATCH 19/28] hw/virtio: Replace g_memdup() by g_memdup2_qemu(), Philippe Mathieu-Daudé, 2021/09/03
- [PATCH 20/28] net/colo: Replace g_memdup() by g_memdup2_qemu(), Philippe Mathieu-Daudé, 2021/09/03
- [RFC PATCH 21/28] ui/clipboard: Replace g_memdup() by g_memdup2_qemu(), Philippe Mathieu-Daudé, 2021/09/03
- [RFC PATCH 22/28] linux-user: Replace g_memdup() by g_memdup2_qemu(), Philippe Mathieu-Daudé, 2021/09/03
- [PATCH 23/28] tests/unit: Replace g_memdup() by g_memdup2_qemu(), Philippe Mathieu-Daudé, 2021/09/03
- [PATCH 24/28] tests/qtest: Replace g_memdup() by g_memdup2_qemu(), Philippe Mathieu-Daudé, 2021/09/03
- [PATCH 25/28] target/arm: Replace g_memdup() by g_memdup2_qemu(), Philippe Mathieu-Daudé, 2021/09/03
- [PATCH 26/28] target/ppc: Replace g_memdup() by g_memdup2_qemu(), Philippe Mathieu-Daudé, 2021/09/03
- [PATCH 27/28] contrib: Replace g_memdup() by g_memdup2_qemu(), Philippe Mathieu-Daudé, 2021/09/03