[issue40880] Invalid read in pegen.c

[Pablo Galindo Salgado]

Change by Pablo Galindo Salgado :


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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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[issue40880] Invalid read in pegen.c

[miss-islington]

miss-islington  added the comment:


New changeset 15fec5627ac343afd0bfa1e847746071982d5172 by Miss Islington (bot) 
in branch '3.9':
bpo-40880: Fix invalid read in newline_in_string in pegen.c (GH-20666)
https://github.com/python/cpython/commit/15fec5627ac343afd0bfa1e847746071982d5172


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[issue40880] Invalid read in pegen.c

[miss-islington]

Change by miss-islington :


--
nosy: +miss-islington
nosy_count: 4.0 -> 5.0
pull_requests: +19887
pull_request: https://github.com/python/cpython/pull/20670

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[issue40880] Invalid read in pegen.c

[Pablo Galindo Salgado]

Pablo Galindo Salgado  added the comment:


New changeset 2e6593db0086004a1ca7f7049218ff9573d473c2 by Pablo Galindo in 
branch 'master':
bpo-40880: Fix invalid read in newline_in_string in pegen.c (#20666)
https://github.com/python/cpython/commit/2e6593db0086004a1ca7f7049218ff9573d473c2


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[issue40880] Invalid read in pegen.c

[Pablo Galindo Salgado]

Change by Pablo Galindo Salgado :


--
keywords: +patch
pull_requests: +19883
stage: needs patch -> patch review
pull_request: https://github.com/python/cpython/pull/20666

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[issue40880] Invalid read in pegen.c

[Lysandros Nikolaou]

Change by Lysandros Nikolaou :


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nosy: +gvanrossum, pablogsal

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[issue40880] Invalid read in pegen.c

[Stefan Krah]

New submission from Stefan Krah :

>From test_decimal:

test_xor (test.test_decimal.PyIBMTestCases) ... ==17597== Invalid read of size 1
==17597==at 0x64A7E2: newline_in_string (pegen.c:940)
==17597==by 0x64A84E: bad_single_statement (pegen.c:958)
==17597==by 0x64AD59: _PyPegen_run_parser (pegen.c:1101)
==17597==by 0x64B044: _PyPegen_run_parser_from_string (pegen.c:1194)
==17597==by 0x5C6D56: PyPegen_ASTFromStringObject (peg_api.c:27)
==17597==by 0x52A2A9: Py_CompileStringObject (pythonrun.c:1259)
==17597==by 0x63CBF6: builtin_compile_impl (bltinmodule.c:819)
==17597==by 0x63AF08: builtin_compile (bltinmodule.c.h:249)
==17597==by 0x5F9446: cfunction_vectorcall_FASTCALL_KEYWORDS 
(methodobject.c:440)
==17597==by 0x4D2642: _PyObject_VectorcallTstate (abstract.h:114)
==17597==by 0x4D26A1: PyObject_Vectorcall (abstract.h:123)
==17597==by 0x4E3F26: call_function (ceval.c:5111)
==17597==  Address 0xadc82bf is 1 bytes before a block of size 22 alloc'd
==17597==at 0x4C3016F: realloc (vg_replace_malloc.c:826)
==17597==by 0x46A983: _PyMem_RawRealloc (obmalloc.c:121)
==17597==by 0x46B49E: PyMem_Realloc (obmalloc.c:623)
==17597==by 0x5C9565: translate_newlines (tokenizer.c:654)
==17597==by 0x5C98FE: PyTokenizer_FromUTF8 (tokenizer.c:751)
==17597==by 0x64AF7F: _PyPegen_run_parser_from_string (pegen.c:1169)
==17597==by 0x5C6D56: PyPegen_ASTFromStringObject (peg_api.c:27)
==17597==by 0x52A2A9: Py_CompileStringObject (pythonrun.c:1259)
==17597==by 0x63CBF6: builtin_compile_impl (bltinmodule.c:819)
==17597==by 0x63AF08: builtin_compile (bltinmodule.c.h:249)
==17597==by 0x5F9446: cfunction_vectorcall_FASTCALL_KEYWORDS 
(methodobject.c:440)
==17597==by 0x4D2642: _PyObject_VectorcallTstate (abstract.h:114)
==17597== 



*--cur dereferences one below p->tok->buf in the last iteration.

--
components: Interpreter Core
messages: 370791
nosy: lys.nikolaou, skrah
priority: normal
severity: normal
stage: needs patch
status: open
title: Invalid read in pegen.c
type: behavior
versions: Python 3.10, Python 3.9

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