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| author |   Philippe Mathieu-Daudé <philmd@redhat.com> | 2021-09-03 11:59:27 +0200 |
|---|---|---|
| committer |   Philippe Mathieu-Daudé <philmd@linaro.org> | 2024-05-08 19:11:34 +0200 |
| commit | f9cc8cfdf346cadc92db8fce32c8b5d7f1095163 (patch) | |
| tree | 55b4968bfbad666ace16fa138880a7c9a7a21039 /scripts/coverage/compare_gcov_json.py | |
| parent | Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging (diff) | |
| download | qemu-f9cc8cfdf346cadc92db8fce32c8b5d7f1095163.tar.xz qemu-f9cc8cfdf346cadc92db8fce32c8b5d7f1095163.zip | |
block/qcow2-bitmap: Replace g_memdup() by g_memdup2()
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() wrapper.
Trivially safe because the argument was directly from sizeof.
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20210903174510.751630-6-philmd@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Diffstat (limited to 'scripts/coverage/compare_gcov_json.py')
0 files changed, 0 insertions, 0 deletions