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fix memory out of bounds in to_cstring

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This commit is contained in:
obdev
2022-10-25 18:08:45 +08:00
committed by wangzelin.wzl
parent 097cd3deee
commit 8e5fcb688f
3 changed files with 25 additions and 40 deletions
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14
deps/oblib/src/lib/trace/ob_trace.cpp vendored
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@ -255,12 +255,12 @@ int UUID::deserialize(const char* buf, const int64_t buf_len, int64_t& pos)
int to_string_and_strip(const char* str, const int64_t length, char* buf, const int64_t buf_len, int64_t& pos)
{
int ret = OB_SUCCESS;
char from[] = "\"\n\r\\";
const char* to[] = { "\\\"", "\\n", "\\r", "\\\\"};
char from[] = "\"\n\r\\\t";
const char* to[] = { "\\\"", "\\n", "\\r", "\\\\", " "};
buf[pos++] = '\"';
for (auto j = 0; j < length && str[j]; ++j) {
bool conv = false;
for (auto i = 0; i < 4; ++i) {
for (auto i = 0; i < sizeof(from) - 1; ++i) {
if (from[i] == str[j]) {
for (const char* toc = to[i]; *toc; ++toc) {
if (pos < buf_len) {
@ -341,15 +341,15 @@ ObSpanCtx::ObSpanCtx()
ObTrace* ObTrace::get_instance()
{
if (OB_ISNULL(save_buffer)) {
thread_local char* default_tsi_buffer = (char*)GET_TSI(ByteBuf<8 * DEFAULT_BUFFER_SIZE>);
thread_local char default_tls_buffer[DEFAULT_BUFFER_SIZE];
thread_local char* default_tsi_buffer = (char*)GET_TSI(ByteBuf<DEFAULT_BUFFER_SIZE>);
thread_local char default_tls_buffer[MIN_BUFFER_SIZE];
struct Guard {
Guard(char* buffer, int64_t size) {
IGNORE_RETURN new(buffer) ObTrace(size);
}
};
thread_local Guard guard1(default_tsi_buffer, 8 * DEFAULT_BUFFER_SIZE);
thread_local Guard guard2(default_tls_buffer, 1 * DEFAULT_BUFFER_SIZE);
thread_local Guard guard1(default_tsi_buffer, DEFAULT_BUFFER_SIZE);
thread_local Guard guard2(default_tls_buffer, MIN_BUFFER_SIZE);
if (OB_ISNULL(default_tsi_buffer)) {
save_buffer = (ObTrace*)default_tls_buffer;
LIB_LOG(WARN, "tsi was nullptr");

29
deps/oblib/src/lib/trace/ob_trace.h vendored
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@ -209,7 +209,7 @@ struct ObSpanCtx final : public common::ObDLinkBase<ObSpanCtx>
struct ObTrace
{
static constexpr uint64_t MAGIC_CODE = 0x1234567887654321ul;
static constexpr int64_t DEFAULT_BUFFER_SIZE = (1L << 13);
static constexpr int64_t DEFAULT_BUFFER_SIZE = (1L << 16);
static constexpr int64_t MIN_BUFFER_SIZE = (1L << 13);
static ObTrace* get_instance();
static void set_trace_buffer(void* buffer, int64_t buffer_size);
@ -273,10 +273,13 @@ struct ObTrace
bool append_tag(ObTagType tag_type, const T& value)
{
int ret = false;
ObString v("");
if (OB_ISNULL(value.ptr())) {
// do nothing
} else {
auto l = value.length();
v = value;
}
auto l = v.length();
if (offset_ + sizeof(ObTagCtx<void*>) + l + 1 - sizeof(void*) >= buffer_size_) {
// do nothing
} else {
@ -284,35 +287,17 @@ struct ObTrace
tag->next_ = last_active_span_->tags_;
last_active_span_->tags_ = tag;
tag->tag_type_ = tag_type;
memcpy(&(tag->data_), value.ptr(), l);
memcpy(&(tag->data_), v.ptr(), l);
offset_ += (sizeof(ObTagCtx<void*>) + l + 1 - sizeof(void*));
data_[offset_ - 1] = '\0';
ret = true;
}
}
return ret;
}
template<class T, typename std::enable_if<std::is_convertible<T, const char*>::value, bool>::type = true>
bool append_tag(ObTagType tag_type, const T& value)
{
int ret = false;
if (OB_ISNULL(value)) {
// do nothing
} else {
auto l = strlen(value);
if (offset_ + sizeof(ObTagCtx<void*>) + l + 1 - sizeof(void*) >= buffer_size_) {
// do nothing
} else {
ObTagCtx<void*>* tag = new (data_ + offset_) ObTagCtx<void*>;
tag->next_ = last_active_span_->tags_;
last_active_span_->tags_ = tag;
tag->tag_type_ = tag_type;
memcpy(&(tag->data_), value, l + 1);
offset_ += (sizeof(ObTagCtx<void*>) + l + 1 - sizeof(void*));
ret = true;
}
}
return ret;
return append_tag(tag_type, OB_ISNULL(value) ? ObString("") : ObString(value));
}
private:
bool check_magic() { return MAGIC_CODE == magic_code_; }

2
deps/oblib/src/lib/utility/ob_print_utils.h vendored
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@ -202,7 +202,7 @@ public:
private:
BufList list_;
int64_t level_;
int idx_;
uint64_t idx_;
};
template <typename T>