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4bb9af48ca
Lua's LNUM patch currently doesn't parse properly certain numbers as it's visible from the following simple tests. On x86_64 host (stock Lua 5.1.5, expected output): $ /usr/bin/lua -e 'print(0x80000000); print(0x80000000000); print(0x100000000)' 2147483648 8796093022208 4294967296 On x86_64 host: $ staging_dir/hostpkg/bin/lua -e 'print(0x80000000); print(0x80000000000); print(0x100000000)' -2147483648 0 0 On x86_64 target: $ lua -e 'print(0x80000000); print(0x80000000000); print(0x100000000)' -2147483648 0 0 On ath79 target: $ lua -e 'print(0x80000000); print(0x80000000000); print(0x100000000)' -2147483648 8796093022208 4294967296 It's caused by two issues fixed in this patch, first issue is caused by unhadled strtoul overflow and second one is caused by the cast of unsigned to signed Lua integer when parsing from hex literal. Run tested on: * Zidoo Z9S with RTD1296 CPU (aarch64_cortex-a53) * qemu/x86_64 * qemu/armvirt_64 * ath79 Signed-off-by: Liangbin Lian <jjm2473@gmail.com> [commit subject/message touches, fixed From to match SOB, fixed another unhandled case in luaO_str2i, host Lua, package bump] Signed-off-by: Petr Štetiar <ynezz@true.cz>
49 lines
1.4 KiB
Diff
49 lines
1.4 KiB
Diff
diff --git a/src/lnum.c b/src/lnum.c
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index 1456b6a2ed23..b0632b04c2b7 100644
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--- a/src/lnum.c
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+++ b/src/lnum.c
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@@ -127,6 +127,8 @@ static int luaO_str2i (const char *s, lua_Integer *res, char **endptr_ref) {
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#else
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return 0; /* Reject the number */
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#endif
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+ } else if (v > LUA_INTEGER_MAX) {
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+ return TK_NUMBER;
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}
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} else if ((v > LUA_INTEGER_MAX) || (*endptr && (!isspace(*endptr)))) {
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return TK_NUMBER; /* not in signed range, or has '.', 'e' etc. trailing */
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@@ -310,3 +312,13 @@ int try_unmint( lua_Integer *r, lua_Integer ib ) {
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return 0;
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}
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+#ifdef LONG_OVERFLOW_LUA_INTEGER
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+unsigned LUA_INTEGER lua_str2ul( const char *str, char **endptr, int base ) {
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+ unsigned long v= strtoul(str, endptr, base);
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+ if ( v > LUA_INTEGER_MAX ) {
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+ errno= ERANGE;
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+ v= ULONG_MAX;
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+ }
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+ return (unsigned LUA_INTEGER)v;
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+}
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+#endif
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diff --git a/src/lnum_config.h b/src/lnum_config.h
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index 19d7a4231a49..1092eead6629 100644
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--- a/src/lnum_config.h
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+++ b/src/lnum_config.h
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@@ -141,7 +141,12 @@
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#endif
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#ifndef lua_str2ul
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-# define lua_str2ul (unsigned LUA_INTEGER)strtoul
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+# if LONG_MAX > LUA_INTEGER_MAX
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+# define LONG_OVERFLOW_LUA_INTEGER
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+ unsigned LUA_INTEGER lua_str2ul( const char *str, char **endptr, int base );
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+# else
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+# define lua_str2ul (unsigned LUA_INTEGER)strtoul
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+# endif
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#endif
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#ifndef LUA_INTEGER_MIN
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# define LUA_INTEGER_MIN (-LUA_INTEGER_MAX -1) /* -2^16|32 */
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--
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1.9.1
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