pkarashchenko commented on code in PR #7285:
URL: https://github.com/apache/incubator-nuttx/pull/7285#discussion_r993286949
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mm/ubsan/ubsan.c:
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@@ -160,7 +160,7 @@ static int64_t get_signed_val(FAR struct type_descriptor
*type,
unsigned extra_bits = sizeof(int64_t) * 8 - type_bit_width(type);
uintptr_t ulong_val = (uintptr_t)val;
- return ((int64_t)ulong_val) << extra_bits >> extra_bits;
+ return (int64_t)(ulong_val << extra_bits >> extra_bits);
Review Comment:
I agree that right shift of negative values is undefined by C standard, but
most compilers implement it to be compatible with integer division by 2
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