8000 gh-111178: fix UBSan failures in `Modules/cjkcodecs/multibytecodec.c` by picnixz · Pull Request #129090 · python/cpython · GitHub
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gh-111178: fix UBSan failures in Modules/cjkcodecs/multibytecodec.c #129090

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Merged
merged 9 commits into from
Jan 25, 2025
Merged

gh-111178: fix UBSan failures in Modules/cjkcodecs/multibytecodec.c #129090

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d5a8c23
Add casts macros
picnixz Jan 20, 2025
efff446
fix UBSan failures for `MultibyteCodecObject`
picnixz Jan 20, 2025
a9fe498
fix UBSan failures for `MultibyteIncrementalEncoderObject`
picnixz Jan 20, 2025
9ed213b
fix UBSan failures for `MultibyteIncrementalDecoderObject`
picnixz Jan 20, 2025
4bcb9b3
fix UBSan failures for `MultibyteStreamReaderObject`
picnixz Jan 20, 2025
0c6d52b
fix UBSan failures for `MultibyteStreamWriterObject`
picnixz Jan 20, 2025
85b6e93
suppress unused return values
picnixz Jan 20, 2025
eb6df00
fixup
picnixz Jan 20, 2025
97cd79b
Move cast macros to `.c`
picnixz Jan 20, 2025
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Move cast macros to .c
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@picnixz
picnixz committed Jan 20, 2025
commit 97cd79b1a127b1594ab2ddf1bd19063733ec0e4e
21 changes: 21 additions & 0 deletions Modules/cjkcodecs/multibytecodec.c
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Expand Up @@ -56,6 +56,27 @@ class _multibytecodec.MultibyteStreamWriter "MultibyteStreamWriterObject *" "cli
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=305a76dfdd24b99c]*/
#undef clinic_get_state

#define _MultibyteCodec_CAST(op) ((MultibyteCodec *)(op))
#define _MultibyteCodecObject_CAST(op) ((MultibyteCodecObject *)(op))

#define _MultibyteStatefulCodecContext_CAST(op) \
((MultibyteStatefulCodecContext *)(op))

#define _MultibyteStatefulEncoderContext_CAST(op) \
((MultibyteStatefulEncoderContext *)(op))
#define _MultibyteStatefulDecoderContext_CAST(op) \
((MultibyteStatefulDecoderContext *)(op))

#define _MultibyteIncrementalEncoderObject_CAST(op) \
((MultibyteIncrementalEncoderObject *)(op))
#define _MultibyteIncrementalDecoderObject_CAST(op) \
((MultibyteIncrementalDecoderObject *)(op))

#define _MultibyteStreamReaderObject_CAST(op) \
((MultibyteStreamReaderObject *)(op))
#define _MultibyteStreamWriterObject_CAST(op) \
((MultibyteStreamWriterObject *)(op))

typedef struct {
PyObject *inobj;
Py_ssize_t inpos, inlen;
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17 changes: 0 additions & 17 deletions Modules/cjkcodecs/multibytecodec.h
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Expand Up @@ -72,28 +72,21 @@ typedef struct {
PyObject *cjk_module;
} MultibyteCodecObject;

#define _MultibyteCodec_CAST(op) ((MultibyteCodec *)(op))
#define _MultibyteCodecObject_CAST(op) ((MultibyteCodecObject *)(op))
#define MultibyteCodec_Check(state, op) Py_IS_TYPE((op), state->multibytecodec_type)

#define _MultibyteStatefulCodec_HEAD \
PyObject_HEAD \
const MultibyteCodec *codec; \
MultibyteCodec_State state; \
PyObject *errors;

typedef struct {
_MultibyteStatefulCodec_HEAD
} MultibyteStatefulCodecContext;

#define _MultibyteStatefulCodecContext_CAST(op) \
((MultibyteStatefulCodecContext *)(op))

#define MAXENCPENDING 2
#define _MultibyteStatefulEncoder_HEAD \
_MultibyteStatefulCodec_HEAD \
PyObject *pending;

typedef struct {
_MultibyteStatefulEncoder_HEAD
} MultibyteStatefulEncoderContext;
Expand All @@ -103,14 +96,10 @@ typedef struct {
_MultibyteStatefulCodec_HEAD \
unsigned char pending[MAXDECPENDING]; \
Py_ssize_t pendingsize;

typedef struct {
_MultibyteStatefulDecoder_HEAD
} MultibyteStatefulDecoderContext;

#define _MultibyteStatefulEncoderContext_CAST(op) ((MultibyteStatefulEncoderContext *)(op))
#define _MultibyteStatefulDecoderContext_CAST(op) ((MultibyteStatefulDecoderContext *)(op))

typedef struct {
_MultibyteStatefulEncoder_HEAD
} MultibyteIncrementalEncoderObject;
Expand All @@ -119,9 +108,6 @@ typedef struct {
_MultibyteStatefulDecoder_HEAD
} MultibyteIncrementalDecoderObject;

#define _MultibyteIncrementalEncoderObject_CAST(op) ((MultibyteIncrementalEncoderObject *)(op))
#define _MultibyteIncrementalDecoderObject_CAST(op) ((MultibyteIncrementalDecoderObject *)(op))

typedef struct {
_MultibyteStatefulDecoder_HEAD
PyObject *stream;
Expand All @@ -132,9 +118,6 @@ typedef struct {
PyObject *stream;
} MultibyteStreamWriterObject;

#define _MultibyteStreamReaderObject_CAST(op) ((MultibyteStreamReaderObject *)(op))
#define _MultibyteStreamWriterObject_CAST(op) ((MultibyteStreamWriterObject *)(op))

/* positive values for illegal sequences */
#define MBERR_TOOSMALL (-1) /* insufficient output buffer space */
#define MBERR_TOOFEW (-2) /* incomplete input buffer */
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