Note: This bug is displayed in read-only format because
the product is no longer active in Red Hat Bugzilla.
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Steps to reproduce:
"""
$ touch /tmp/ausearch.log
$ cat t.py
#!/bin/python
import auparse
aup = auparse.AuParser(auparse.AUSOURCE_FILE_POINTER,open('/tmp/ausearch.log', 'r'))
aup.reset()
$ python t.py
"""
It almost works if enclosing the script as:
with open('/tmp/ausearch.log', 'r') as logfile:
aup = auparse.AuParser(auparse.AUSOURCE_FILE_POINTER,logfile)
aup.reset()
but will crash in auparse_destroy due to double fclose call.
The problem is that python does not know about the references
of the FILE object. For example:
$ gdb -q --args python t.py
Reading symbols from /usr/bin/python2.7...Reading symbols from /usr/lib/debug/usr/bin/python2.7.debug...done.
done.
(gdb) b AuParser_init
Function "AuParser_init" not defined.
Make breakpoint pending on future shared library load? (y or [n]) y
Breakpoint 1 (AuParser_init) pending.
(gdb) r
Starting program: /usr/bin/python t.py
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Breakpoint 1, AuParser_init (self=0x7ffff7f5e138, args=(6, <file at remote 0x7ffff7f226f0>), kwds=0x0) at ../../../bindings/python/auparse_python.c:306
306 {
(gdb) p &self.au
$1 = (auparse_state_t **) 0x7ffff7f5e148
(gdb) watch *$1
Hardware watchpoint 2: *$1
(gdb) c
Continuing.
Hardware watchpoint 2: *$1
Old value = (auparse_state_t *) 0x0
New value = (auparse_state_t *) 0x6701e0
0x00007ffff05fa04d in AuParser_init (self=0x7ffff7f5e138, args=(6, <file at remote 0x7ffff7f226f0>), kwds=0x0) at ../../../bindings/python/auparse_python.c:439
439 if ((self->au = auparse_init(source_type, fp)) == NULL) {
(gdb) p& self.au.in._fileno
$2 = (int *) 0x6b8980
Hardware watchpoint 3: *$2
(gdb) c
Continuing.
Hardware watchpoint 3: *$2
Old value = 7
New value = -1
_IO_new_file_close_it (fp=fp@entry=0x6b8910) at fileops.c:193
193 fp->_offset = _IO_pos_BAD;
(gdb) bt
#0 _IO_new_file_close_it (fp=fp@entry=0x6b8910) at fileops.c:193
#1 0x00007ffff6d95b10 in _IO_new_fclose (fp=0x6b8910) at iofclose.c:59
#2 0x00007ffff7a76f79 in close_the_file (f=f@entry=0x7ffff7f226f0) at /usr/src/debug/Python-2.7.5/Objects/fileobject.c:456
#3 0x00007ffff7a77f78 in file_dealloc (f=0x7ffff7f226f0) at /usr/src/debug/Python-2.7.5/Objects/fileobject.c:619
#4 0x00007ffff7aab8c3 in tupledealloc (op=0x7ffff7eb7320) at /usr/src/debug/Python-2.7.5/Objects/tupleobject.c:238
#5 0x00007ffff7af4350 in do_call (nk=<optimized out>, na=<optimized out>, pp_stack=0x7fffffffdff0, func=<optimized out>) at /usr/src/debug/Python-2.7.5/Python/ceval.c:4628
#6 call_function (oparg=<optimized out>, pp_stack=0x7fffffffdff0) at /usr/src/debug/Python-2.7.5/Python/ceval.c:4431
#7 PyEval_EvalFrameEx (f=f@entry=Frame 0x6b8760, for file t.py, line 4, in <module> (), throwflag=throwflag@entry=0) at /usr/src/debug/Python-2.7.5/Python/ceval.c:3040
#8 0x00007ffff7af6e3d in PyEval_EvalCodeEx (co=co@entry=0x7ffff7f21e30,
globals=globals@entry={'auparse': <module at remote 0x7ffff7ed8bb0>, '__builtins__': <module at remote 0x7ffff7f9eb08>, '__file__': 't.py', '__package__': None, '__name__': '__main__', '__doc__': None},
locals=locals@entry={'auparse': <module at remote 0x7ffff7ed8bb0>, '__builtins__': <module at remote 0x7ffff7f9eb08>, '__file__': 't.py', '__package__': None, '__name__': '__main__', '__doc__': None},
args=args@entry=0x0, argcount=argcount@entry=0, kws=kws@entry=0x0, kwcount=kwcount@entry=0, defs=defs@entry=0x0, defcount=defcount@entry=0, closure=closure@entry=0x0)
at /usr/src/debug/Python-2.7.5/Python/ceval.c:3640
#9 0x00007ffff7af6f42 in PyEval_EvalCode (co=co@entry=0x7ffff7f21e30,
globals=globals@entry={'auparse': <module at remote 0x7ffff7ed8bb0>, '__builtins__': <module at remote 0x7ffff7f9eb08>, '__file__': 't.py', '__package__': None, '__name__': '__main__', '__doc__': None},
locals=locals@entry={'auparse': <module at remote 0x7ffff7ed8bb0>, '__builtins__': <module at remote 0x7ffff7f9eb08>, '__file__': 't.py', '__package__': None, '__name__': '__main__', '__doc__': None})
at /usr/src/debug/Python-2.7.5/Python/ceval.c:689
#10 0x00007ffff7b1037f in run_mod (mod=<optimized out>, filename=filename@entry=0x7fffffffe6bb "t.py",
globals=globals@entry={'auparse': <module at remote 0x7ffff7ed8bb0>, '__builtins__': <module at remote 0x7ffff7f9eb08>, '__file__': 't.py', '__package__': None, '__name__': '__main__', '__doc__': None},
locals=locals@entry={'auparse': <module at remote 0x7ffff7ed8bb0>, '__builtins__': <module at remote 0x7ffff7f9eb08>, '__file__': 't.py', '__package__': None, '__name__': '__main__', '__doc__': None},
flags=flags@entry=0x7fffffffe290, arena=arena@entry=0x6b7e90) at /usr/src/debug/Python-2.7.5/Python/pythonrun.c:1374
[...]
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2018:0760
Steps to reproduce: """ $ touch /tmp/ausearch.log $ cat t.py #!/bin/python import auparse aup = auparse.AuParser(auparse.AUSOURCE_FILE_POINTER,open('/tmp/ausearch.log', 'r')) aup.reset() $ python t.py """ It almost works if enclosing the script as: with open('/tmp/ausearch.log', 'r') as logfile: aup = auparse.AuParser(auparse.AUSOURCE_FILE_POINTER,logfile) aup.reset() but will crash in auparse_destroy due to double fclose call. The problem is that python does not know about the references of the FILE object. For example: $ gdb -q --args python t.py Reading symbols from /usr/bin/python2.7...Reading symbols from /usr/lib/debug/usr/bin/python2.7.debug...done. done. (gdb) b AuParser_init Function "AuParser_init" not defined. Make breakpoint pending on future shared library load? (y or [n]) y Breakpoint 1 (AuParser_init) pending. (gdb) r Starting program: /usr/bin/python t.py [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". Breakpoint 1, AuParser_init (self=0x7ffff7f5e138, args=(6, <file at remote 0x7ffff7f226f0>), kwds=0x0) at ../../../bindings/python/auparse_python.c:306 306 { (gdb) p &self.au $1 = (auparse_state_t **) 0x7ffff7f5e148 (gdb) watch *$1 Hardware watchpoint 2: *$1 (gdb) c Continuing. Hardware watchpoint 2: *$1 Old value = (auparse_state_t *) 0x0 New value = (auparse_state_t *) 0x6701e0 0x00007ffff05fa04d in AuParser_init (self=0x7ffff7f5e138, args=(6, <file at remote 0x7ffff7f226f0>), kwds=0x0) at ../../../bindings/python/auparse_python.c:439 439 if ((self->au = auparse_init(source_type, fp)) == NULL) { (gdb) p& self.au.in._fileno $2 = (int *) 0x6b8980 Hardware watchpoint 3: *$2 (gdb) c Continuing. Hardware watchpoint 3: *$2 Old value = 7 New value = -1 _IO_new_file_close_it (fp=fp@entry=0x6b8910) at fileops.c:193 193 fp->_offset = _IO_pos_BAD; (gdb) bt #0 _IO_new_file_close_it (fp=fp@entry=0x6b8910) at fileops.c:193 #1 0x00007ffff6d95b10 in _IO_new_fclose (fp=0x6b8910) at iofclose.c:59 #2 0x00007ffff7a76f79 in close_the_file (f=f@entry=0x7ffff7f226f0) at /usr/src/debug/Python-2.7.5/Objects/fileobject.c:456 #3 0x00007ffff7a77f78 in file_dealloc (f=0x7ffff7f226f0) at /usr/src/debug/Python-2.7.5/Objects/fileobject.c:619 #4 0x00007ffff7aab8c3 in tupledealloc (op=0x7ffff7eb7320) at /usr/src/debug/Python-2.7.5/Objects/tupleobject.c:238 #5 0x00007ffff7af4350 in do_call (nk=<optimized out>, na=<optimized out>, pp_stack=0x7fffffffdff0, func=<optimized out>) at /usr/src/debug/Python-2.7.5/Python/ceval.c:4628 #6 call_function (oparg=<optimized out>, pp_stack=0x7fffffffdff0) at /usr/src/debug/Python-2.7.5/Python/ceval.c:4431 #7 PyEval_EvalFrameEx (f=f@entry=Frame 0x6b8760, for file t.py, line 4, in <module> (), throwflag=throwflag@entry=0) at /usr/src/debug/Python-2.7.5/Python/ceval.c:3040 #8 0x00007ffff7af6e3d in PyEval_EvalCodeEx (co=co@entry=0x7ffff7f21e30, globals=globals@entry={'auparse': <module at remote 0x7ffff7ed8bb0>, '__builtins__': <module at remote 0x7ffff7f9eb08>, '__file__': 't.py', '__package__': None, '__name__': '__main__', '__doc__': None}, locals=locals@entry={'auparse': <module at remote 0x7ffff7ed8bb0>, '__builtins__': <module at remote 0x7ffff7f9eb08>, '__file__': 't.py', '__package__': None, '__name__': '__main__', '__doc__': None}, args=args@entry=0x0, argcount=argcount@entry=0, kws=kws@entry=0x0, kwcount=kwcount@entry=0, defs=defs@entry=0x0, defcount=defcount@entry=0, closure=closure@entry=0x0) at /usr/src/debug/Python-2.7.5/Python/ceval.c:3640 #9 0x00007ffff7af6f42 in PyEval_EvalCode (co=co@entry=0x7ffff7f21e30, globals=globals@entry={'auparse': <module at remote 0x7ffff7ed8bb0>, '__builtins__': <module at remote 0x7ffff7f9eb08>, '__file__': 't.py', '__package__': None, '__name__': '__main__', '__doc__': None}, locals=locals@entry={'auparse': <module at remote 0x7ffff7ed8bb0>, '__builtins__': <module at remote 0x7ffff7f9eb08>, '__file__': 't.py', '__package__': None, '__name__': '__main__', '__doc__': None}) at /usr/src/debug/Python-2.7.5/Python/ceval.c:689 #10 0x00007ffff7b1037f in run_mod (mod=<optimized out>, filename=filename@entry=0x7fffffffe6bb "t.py", globals=globals@entry={'auparse': <module at remote 0x7ffff7ed8bb0>, '__builtins__': <module at remote 0x7ffff7f9eb08>, '__file__': 't.py', '__package__': None, '__name__': '__main__', '__doc__': None}, locals=locals@entry={'auparse': <module at remote 0x7ffff7ed8bb0>, '__builtins__': <module at remote 0x7ffff7f9eb08>, '__file__': 't.py', '__package__': None, '__name__': '__main__', '__doc__': None}, flags=flags@entry=0x7fffffffe290, arena=arena@entry=0x6b7e90) at /usr/src/debug/Python-2.7.5/Python/pythonrun.c:1374 [...]