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This patch adds asserts to fix coverity defects
1) CID 1474437 (Out-of-bounds access)
2) CID 1474436 (Out-of-bounds access)
From manual inspection, out of bounds access cannot occur due to
bounds checking but coverity fails to detect the checks.
We are adding asserts as a secondary check.
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This patch extends the RTEMS OFW API by adding
rtems_ofw_find_device_by_compat
This function checks if a node has the expected compatible
property.
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Fixed bugs in rtems_ofw_get_prop, rtems_ofw_get_prop_len
and removed hardcoded value.
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Refactored recursive rtems_ofw_get_effective_phandle into a
iterative function.
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Changed rtems_ofw_get_prop to use strlcpy instead of strncpy
to ensure the buffer is null terminated incase of overflow.
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Fixed use after free and null pointer dereference defects
FIXES:
1) CID 1472601 (NULL_RETURNS)
2) CID 1472600 (USE_AFTER_FREE)
3) CID 1472599 (USE_AFTER_FREE)
4) CID 1472598 (USE_AFTER_FREE)
5) CID 1472596 (USE_AFTER_FREE)
The below two defects have to marked false positive
1) CID 1472597 (ARRAY_VS_SINGLETON)
2) CID 1472595 (ARRAY_VS_SINGLETON)
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RTEMS OFW is a FDT only implementation of the OpenFirmWare
interface. This API is created to be compatible with FreeBSD
OpenFirmWare interface. The main intention is to make
porting of FreeBSD drivers to RTEMS easier.
Most functions implemented have an direct one-one mapping
with the original OFW API and some extra auxiliary functions
were implemented to make working with device trees easier in
RTEMS.
Update #3784
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