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hw/core/sysbus: Assert memory region index is in range

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Devices incorrectly modelled might use invalid index while
calling sysbus_mmio_get_region(), leading to OOB access.
Help developers by asserting the index is in range.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200806130945.21629-3-f4bug@amsat.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Philippe Mathieu-Daudé 2020-08-06 15:09:45 +02:00 committed by Laurent Vivier
parent cc6498ec6e
commit f234501c67
1 changed files with 1 additions and 0 deletions
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hw/core/sysbus.c
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@ -199,6 +199,7 @@ void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory)
MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n)
{
assert(n >= 0 && n < QDEV_MAX_MMIO);
return dev->mmio[n].memory;
}