[pcre-dev] JIT access violation

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Auteur: Ralf Junker
Datum:  
Aan: pcre-dev@exim.org
Onderwerp: [pcre-dev] JIT access violation
I am seeing an access violation and programm crash running the following
script in pcretest, Win32:

/\Q\ \E/S++
\x{20}\P

Can someone reproduce my findings?

Win64 works fine, by the way.

Ralf

----------

Error 00001. 0x130610 (Thread 0x0EC8):
Access overrun: Attempt to access 2 byte(s) at 0x020B7108+268482618, that is
at offset 56+268482618 in heap block 0x020B70D0 which is only 69 bytes
long.
| pcre_jit_compile.c line 2915:

|
| /* We do not support alternatives now. */

|>if (*(common->start + GET(common->start, 1)) == OP_ALT)
| return FALSE;

|
Call Tree:
0x00467850(=pcretest.exe:0x01:066850) pcre_jit_compile.c#2915
0x0053D08B(=pcretest.exe:0x01:13C08B) pcre_jit_compile.c#9127
0x00543081(=pcretest.exe:0x01:142081) pcre_study.c#1506
0x00550150(=pcretest.exe:0x01:14F150) pcretest.c#3976
0x005621EB(=pcretest.exe:0x01:1611EB)

The memory block (0x020B70D0) [size: 69 bytes] was allocated with malloc
| pcre_compile.c line 8097:

|
| size = sizeof(REAL_PCRE) + (length + cd->names_found *

cd->name_entry_size) * sizeof(pcre_uchar);
|>re = (REAL_PCRE *)(PUBL(malloc))(size);
|
| if (re == NULL)

Call Tree:
0x004E2212(=pcretest.exe:0x01:0E1212) pcre_compile.c#8097
0x004E1661(=pcretest.exe:0x01:0E0661) pcre_compile.c#7744
0x0054FDB3(=pcretest.exe:0x01:14EDB3) pcretest.c#3885
0x005621EB(=pcretest.exe:0x01:1611EB)

------------------------------------------
Error 00002. 0x400000 (r) (Thread 0x0EC8):
Exception 0xC0000005: Access violation at 0x120C2942.
| pcre_jit_compile.c line 2915:

|
| /* We do not support alternatives now. */

|>if (*(common->start + GET(common->start, 1)) == OP_ALT)
| return FALSE;

|
Call Tree:
0x00467850(=pcretest.exe:0x01:066850) pcre_jit_compile.c#2915
0x0053D08B(=pcretest.exe:0x01:13C08B) pcre_jit_compile.c#9127
0x00543081(=pcretest.exe:0x01:142081) pcre_study.c#1506
0x00550150(=pcretest.exe:0x01:14F150) pcretest.c#3976
0x005621EB(=pcretest.exe:0x01:1611EB)