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bpo-23689: re module, fix memory leak when a match is terminated by a signal or memory allocation failure #32283

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Merged
serhiy-storchaka merged 11 commits into from Apr 3, 2022
Merged

bpo-23689: re module, fix memory leak when a match is terminated by a signal or memory allocation failure #32283

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e5317fe
1. add variables
wjssz Apr 3, 2022
28e4d2d
2. add _CompileData class to _compile.py
wjssz Apr 3, 2022
7493fad
3. add repeat_count parameter to _sre.compile() function
wjssz Apr 3, 2022
b928335
4. emit repeat_count in sre_compile.py
wjssz Apr 3, 2022
dfec05d
5. change _validate_outer() parameter
wjssz Apr 3, 2022
db7e88b
6. validate in _validate_inner() / _validate_outer()
wjssz Apr 3, 2022
a43cb6e
7. allocate repeats_array for SRE_STATE
wjssz Apr 3, 2022
1560a0c
8. support code in sre_lib.h
wjssz Apr 3, 2022
96be025
9. add unit-tests
wjssz Apr 3, 2022
7ee3e66
a. skip -= field_number
wjssz Apr 3, 2022
e95b19f
b. improve unit-test
wjssz Apr 3, 2022
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a. skip -= field_number
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@wjssz
wjssz committed Apr 3, 2022
commit 7ee3e669b08a84721e036b2f22256abc3f77521b
10 changes: 5 additions & 5 deletions Modules/_sre.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1849,7 +1849,7 @@ _validate_inner(SRE_CODE *code, SRE_CODE *end, PatternObject *self)
case SRE_OP_REPEAT:
case SRE_OP_POSSESSIVE_REPEAT:
{
SRE_CODE op1 = op, min, max, repeat_index, _fields;
SRE_CODE op1 = op, min, max, repeat_index;
GET_SKIP;
GET_ARG; min = arg;
GET_ARG; max = arg;
Expand All @@ -1861,13 +1861,13 @@ _validate_inner(SRE_CODE *code, SRE_CODE *end, PatternObject *self)
GET_ARG; repeat_index = arg;
if (repeat_index >= (size_t)self->repeat_count)
FAIL;
_fields = 4;
skip -= 4;
} else {
_fields = 3;
skip -= 3;
}
if (!_validate_inner(code, code+skip-_fields, self))
if (!_validate_inner(code, code+skip, self))
FAIL;
code += skip-_fields;
code += skip;
GET_OP;
if (op1 == SRE_OP_POSSESSIVE_REPEAT) {
if (op != SRE_OP_SUCCESS)
Expand Down