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Fix runtime bugs

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- fix string leak in `js_printf_internal` on errors
- read `errno` before potential side effects in `js_os_stat`
This commit is contained in:
Charlie Gordon 2024-02-11 12:49:40 +01:00
parent c9e6c56c70
commit 48deab1aeb
2 changed files with 21 additions and 22 deletions
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11
quickjs-libc.c
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@ -150,7 +150,7 @@ static JSValue js_printf_internal(JSContext *ctx,
uint8_t cbuf[UTF8_CHAR_LEN_MAX+1];
JSValue res;
DynBuf dbuf;
const char *fmt_str;
const char *fmt_str = NULL;
const uint8_t *fmt, *fmt_end;
const uint8_t *p;
char *q;
@ -251,7 +251,7 @@ static JSValue js_printf_internal(JSContext *ctx,
string_arg = JS_ToCString(ctx, argv[i++]);
if (!string_arg)
goto fail;
int32_arg = unicode_from_utf8((uint8_t *)string_arg, UTF8_CHAR_LEN_MAX, &p);
int32_arg = unicode_from_utf8((const uint8_t *)string_arg, UTF8_CHAR_LEN_MAX, &p);
JS_FreeCString(ctx, string_arg);
} else {
if (JS_ToInt32(ctx, &int32_arg, argv[i++]))
@ -355,6 +355,7 @@ static JSValue js_printf_internal(JSContext *ctx,
return res;
fail:
JS_FreeCString(ctx, fmt_str);
dbuf_free(&dbuf);
return JS_EXCEPTION;
}
@ -2532,12 +2533,14 @@ static JSValue js_os_stat(JSContext *ctx, JSValueConst this_val,
else
res = stat(path, &st);
#endif
if (res < 0)
err = errno;
else
err = 0;
JS_FreeCString(ctx, path);
if (res < 0) {
err = errno;
obj = JS_NULL;
} else {
err = 0;
obj = JS_NewObject(ctx);
if (JS_IsException(obj))
return JS_EXCEPTION;

20
quickjs.c
View File

@ -598,7 +598,7 @@ typedef struct JSFunctionBytecode {
uint8_t backtrace_barrier : 1; /* stop backtrace on this function */
uint8_t read_only_bytecode : 1;
uint8_t is_direct_or_indirect_eval : 1; /* used by JS_GetScriptOrModuleName() */
/* XXX: 4 bits available */
/* XXX: 10 bits available */
uint8_t *byte_code_buf; /* (self pointer) */
int byte_code_len;
JSAtom func_name;
@ -1042,13 +1042,11 @@ static JSValue JS_EvalObject(JSContext *ctx, JSValueConst this_obj,
JSValueConst val, int flags, int scope_idx);
JSValue __attribute__((format(printf, 2, 3))) JS_ThrowInternalError(JSContext *ctx, const char *fmt, ...);
static __maybe_unused void JS_DumpAtoms(JSRuntime *rt);
static __maybe_unused void JS_DumpString(JSRuntime *rt,
const JSString *p);
static __maybe_unused void JS_DumpString(JSRuntime *rt, const JSString *p);
static __maybe_unused void JS_DumpObjectHeader(JSRuntime *rt);
static __maybe_unused void JS_DumpObject(JSRuntime *rt, JSObject *p);
static __maybe_unused void JS_DumpGCObject(JSRuntime *rt, JSGCObjectHeader *p);
static __maybe_unused void JS_DumpValueShort(JSRuntime *rt,
JSValueConst val);
static __maybe_unused void JS_DumpValueShort(JSRuntime *rt, JSValueConst val);
static __maybe_unused void JS_DumpValue(JSContext *ctx, JSValueConst val);
static __maybe_unused void JS_PrintValue(JSContext *ctx,
const char *str,
@ -1057,14 +1055,11 @@ static __maybe_unused void JS_DumpShapes(JSRuntime *rt);
static JSValue js_function_apply(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv, int magic);
static void js_array_finalizer(JSRuntime *rt, JSValue val);
static void js_array_mark(JSRuntime *rt, JSValueConst val,
JS_MarkFunc *mark_func);
static void js_array_mark(JSRuntime *rt, JSValueConst val, JS_MarkFunc *mark_func);
static void js_object_data_finalizer(JSRuntime *rt, JSValue val);
static void js_object_data_mark(JSRuntime *rt, JSValueConst val,
JS_MarkFunc *mark_func);
static void js_object_data_mark(JSRuntime *rt, JSValueConst val, JS_MarkFunc *mark_func);
static void js_c_function_finalizer(JSRuntime *rt, JSValue val);
static void js_c_function_mark(JSRuntime *rt, JSValueConst val,
JS_MarkFunc *mark_func);
static void js_c_function_mark(JSRuntime *rt, JSValueConst val, JS_MarkFunc *mark_func);
static void js_bytecode_function_finalizer(JSRuntime *rt, JSValue val);
static void js_bytecode_function_mark(JSRuntime *rt, JSValueConst val,
JS_MarkFunc *mark_func);
@ -4190,7 +4185,7 @@ static JSValue JS_ConcatString1(JSContext *ctx,
return JS_MKPTR(JS_TAG_STRING, p);
}
/* op1 and op2 are converted to strings. For convience, op1 or op2 =
/* op1 and op2 are converted to strings. For convenience, op1 or op2 =
JS_EXCEPTION are accepted and return JS_EXCEPTION. */
static JSValue JS_ConcatString(JSContext *ctx, JSValue op1, JSValue op2)
{
@ -17157,6 +17152,7 @@ static JSValue JS_CallInternal(JSContext *caller_ctx, JSValueConst func_obj,
op1 = sp[-1];
pc += 4;
/* quick and dirty test for JS_TAG_INT, JS_TAG_BOOL, JS_TAG_NULL and JS_TAG_UNDEFINED */
if ((uint32_t)JS_VALUE_GET_TAG(op1) <= JS_TAG_UNDEFINED) {
res = JS_VALUE_GET_INT(op1);
} else {