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strat: minor result/overflow check fixes

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This commit is contained in:
Michael Scire 2022-03-13 03:30:17 -07:00
parent ce44fe4ea9
commit f037d60c75
2 changed files with 9 additions and 17 deletions
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20
libstratosphere/include/stratosphere/fs/fsa/fs_ifile.hpp
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@ -36,12 +36,10 @@ namespace ams::fs::fsa {
} }
/* Check that the read is valid. */ /* Check that the read is valid. */
R_UNLESS(buffer != nullptr, fs::ResultNullptrArgument()); R_UNLESS(buffer != nullptr, fs::ResultNullptrArgument());
R_UNLESS(offset >= 0, fs::ResultOutOfRange()); R_UNLESS(offset >= 0, fs::ResultOutOfRange());
R_UNLESS(util::IsIntValueRepresentable<s64>(size), fs::ResultOutOfRange()); R_UNLESS(util::IsIntValueRepresentable<s64>(size), fs::ResultOutOfRange());
R_UNLESS(util::CanAddWithoutOverflow<s64>(offset, size), fs::ResultOutOfRange());
const s64 signed_size = static_cast<s64>(size);
R_UNLESS((std::numeric_limits<s64>::max() - offset) >= signed_size, fs::ResultOutOfRange());
/* Do the read. */ /* Do the read. */
R_RETURN(this->DoRead(out, offset, buffer, size, option)); R_RETURN(this->DoRead(out, offset, buffer, size, option));
@ -68,12 +66,10 @@ namespace ams::fs::fsa {
} }
/* Check the write is valid. */ /* Check the write is valid. */
R_UNLESS(buffer != nullptr, fs::ResultNullptrArgument()); R_UNLESS(buffer != nullptr, fs::ResultNullptrArgument());
R_UNLESS(offset >= 0, fs::ResultOutOfRange()); R_UNLESS(offset >= 0, fs::ResultOutOfRange());
R_UNLESS(util::IsIntValueRepresentable<s64>(size), fs::ResultOutOfRange()); R_UNLESS(util::IsIntValueRepresentable<s64>(size), fs::ResultOutOfRange());
R_UNLESS(util::CanAddWithoutOverflow<s64>(offset, size), fs::ResultOutOfRange());
const s64 signed_size = static_cast<s64>(size);
R_UNLESS((std::numeric_limits<s64>::max() - offset) >= signed_size, fs::ResultOutOfRange());
R_RETURN(this->DoWrite(offset, buffer, size, option)); R_RETURN(this->DoWrite(offset, buffer, size, option));
} }

6
libstratosphere/source/time/impl/util/time_impl_util_api.cpp
View File

@ -157,11 +157,7 @@ namespace ams::time::impl::util {
R_UNLESS(out != nullptr, time::ResultInvalidPointer()); R_UNLESS(out != nullptr, time::ResultInvalidPointer());
R_UNLESS(from.source_id == to.source_id, time::ResultNotComparable()); R_UNLESS(from.source_id == to.source_id, time::ResultNotComparable());
const bool no_overflow = (from.value >= 0 ? (to.value >= std::numeric_limits<s64>::min() + from.value) R_UNLESS(ams::util::TrySubtractWithoutOverflow(out, to.value, from.value), time::ResultOverflowed());
: (to.value <= std::numeric_limits<s64>::max() + from.value));
R_UNLESS(no_overflow, time::ResultOverflowed());
*out = to.value - from.value;
return ResultSuccess(); return ResultSuccess();
} }