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BJData dimension length can not be string_t::npos, fix #3541 (#3543)

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* BJData dimension length can not be string_t::npos, fix #3541

* handle error messages on 32bit machine

* add explanation to why size can not be string_t::npos

* add test cases to 32bit unit test

Co-authored-by: Florian Albrechtskirchinger <falbrechtskirchinger@gmail.com>
This commit is contained in:
Qianqian Fang 2022-06-18 13:12:22 -04:00 committed by GitHub
parent f6acdbec2c
commit 13730235f2
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 29 additions and 2 deletions
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2
include/nlohmann/detail/input/binary_reader.hpp
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@ -2179,7 +2179,7 @@ class binary_reader
for (auto i : dim)
{
result *= i;
if (result == 0) // because dim elements shall not have zeros, result = 0 means overflow happened
if (result == 0 || result == string_t::npos) // because dim elements shall not have zeros, result = 0 means overflow happened; it also can't be string_t::npos as it is used to initialize size in get_ubjson_size_type()
{
return sax->parse_error(chars_read, get_token_string(), out_of_range::create(408, exception_message(input_format, "excessive ndarray size caused overflow", "size"), nullptr));
}

2
single_include/nlohmann/json.hpp
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@ -10879,7 +10879,7 @@ class binary_reader
for (auto i : dim)
{
result *= i;
if (result == 0) // because dim elements shall not have zeros, result = 0 means overflow happened
if (result == 0 || result == string_t::npos) // because dim elements shall not have zeros, result = 0 means overflow happened; it also can't be string_t::npos as it is used to initialize size in get_ubjson_size_type()
{
return sax->parse_error(chars_read, get_token_string(), out_of_range::create(408, exception_message(input_format, "excessive ndarray size caused overflow", "size"), nullptr));
}

15
tests/src/unit-32bit.cpp
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@ -98,6 +98,19 @@ TEST_CASE("BJData")
{
SECTION("array")
{
SECTION("optimized array: negative size")
{
std::vector<uint8_t> vM = {'[', '$', 'M', '#', '[', 'I', 0x00, 0x20, 'M', 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0xFF, ']'};
std::vector<uint8_t> vMX = {'[', '$', 'U', '#', '[', 'M', 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 'U', 0x01, ']'};
json _;
CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vM), "[json.exception.out_of_range.408] syntax error while parsing BJData size: integer value overflow", json::out_of_range&);
CHECK(json::from_bjdata(vM, true, false).is_discarded());
CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vMX), "[json.exception.out_of_range.408] syntax error while parsing BJData size: integer value overflow", json::out_of_range&);
CHECK(json::from_bjdata(vMX, true, false).is_discarded());
}
SECTION("optimized array: integer value overflow")
{
std::vector<uint8_t> vL = {'[', '#', 'L', 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7F};
@ -105,8 +118,10 @@ TEST_CASE("BJData")
json _;
CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vL), "[json.exception.out_of_range.408] syntax error while parsing BJData size: integer value overflow", json::out_of_range&);
CHECK(json::from_bjdata(vL, true, false).is_discarded());
CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vM), "[json.exception.out_of_range.408] syntax error while parsing BJData size: integer value overflow", json::out_of_range&);
CHECK(json::from_bjdata(vM, true, false).is_discarded());
}
}
}

12
tests/src/unit-bjdata.cpp
View File

@ -2620,6 +2620,7 @@ TEST_CASE("BJData")
std::vector<uint8_t> vl = {'[', '#', 'l', 0x00, 0x00, 0x00, 0xF2};
std::vector<uint8_t> vL = {'[', '#', 'L', 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF3};
std::vector<uint8_t> vM = {'[', '$', 'M', '#', '[', 'I', 0x00, 0x20, 'M', 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0xFF, ']'};
std::vector<uint8_t> vMX = {'[', '$', 'U', '#', '[', 'M', 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 'U', 0x01, ']'};
json _;
CHECK_THROWS_WITH_AS(_ = json::from_bjdata(v1), "[json.exception.parse_error.113] parse error at byte 4: syntax error while parsing BJData size: count in an optimized container must be positive", json::parse_error&);
@ -2651,8 +2652,17 @@ TEST_CASE("BJData")
#if SIZE_MAX != 0xffffffff
CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vM), "[json.exception.out_of_range.408] syntax error while parsing BJData size: excessive ndarray size caused overflow", json::out_of_range&);
#else
CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vM), "[json.exception.out_of_range.408] syntax error while parsing BJData size: integer value overflow", json::out_of_range&);
#endif
CHECK(json::from_bjdata(vM, true, false).is_discarded());
#if SIZE_MAX != 0xffffffff
CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vMX), "[json.exception.out_of_range.408] syntax error while parsing BJData size: excessive ndarray size caused overflow", json::out_of_range&);
#else
CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vMX), "[json.exception.out_of_range.408] syntax error while parsing BJData size: integer value overflow", json::out_of_range&);
#endif
CHECK(json::from_bjdata(vMX, true, false).is_discarded());
}
SECTION("optimized array: integer value overflow")
@ -2663,10 +2673,12 @@ TEST_CASE("BJData")
json _;
#if SIZE_MAX == 0xffffffff
CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vL), "[json.exception.out_of_range.408] syntax error while parsing BJData size: integer value overflow", json::out_of_range&);
CHECK(json::from_bjdata(vL, true, false).is_discarded());
#endif
#if SIZE_MAX == 0xffffffff
CHECK_THROWS_WITH_AS(_ = json::from_bjdata(vM), "[json.exception.out_of_range.408] syntax error while parsing BJData size: integer value overflow", json::out_of_range&);
CHECK(json::from_bjdata(vM, true, false).is_discarded());
#endif
}