RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Bug 1804625 - dnf crashes with an UTF-8 char in a repository filename
Summary: dnf crashes with an UTF-8 char in a repository filename
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: swig
Version: 8.1
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: 8.1
Assignee: Jitka Plesnikova
QA Contact: RHEL CS Apps Subsystem QE
URL:
Whiteboard:
Depends On:
Blocks: 1803038
TreeView+ depends on / blocked
 
Reported: 2020-02-19 09:57 UTC by Pavla Kratochvilova
Modified: 2023-12-15 17:22 UTC (History)
8 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 1803038
Environment:
Last Closed: 2020-11-04 02:32:11 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
Backported upstream fix (11.94 KB, patch)
2020-02-20 11:12 UTC, Jitka Plesnikova 		no flags Details | Diff
swig file (98 bytes, text/x-matlab)
2020-03-30 11:34 UTC, Jitka Plesnikova 		no flags Details
test file (211 bytes, text/plain)
2020-03-30 11:34 UTC, Jitka Plesnikova 		no flags Details
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2020:4633 0 None None None 2020-11-04 02:32:16 UTC

Description Pavla Kratochvilova 2020-02-19 09:57:35 UTC 
+++ This bug was initially created as a clone of Bug #1803038 +++

Description of problem:
DNF crashes with an UTF-8 char in the repository filename

Version-Release number of selected component (if applicable):
libdnf-0.35.1-9.el8_1.x86_64
dnf-4.2.7-7.el8_1.noarch

How reproducible:
100%

Steps to Reproduce:
1. touch '/etc/yum.repos.d/team'$'\303''_epel.repo' 
2. dnf repolist

Actual results:
# dnf repolist
Updating Subscription Management repositories.
Unable to read consumer identity
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Segmentation fault (core dumped)

Expected results:
No crash.

Additional info:
This looks similar to another bug, but this commit has already been backported:
https://github.com/rpm-software-management/libdnf/commit/97c23dfff803ef30b4d25a224218da1442a49220

I will attach the corresponding coredump.

(gdb) bt
#0  0x00007f45515415aa in PyBytes_AsStringAndSize (obj=<optimized out>, s=<optimized out>, len=<optimized out>, obj=<optimized out>, s=<optimized out>, len=<optimized out>)
    at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Objects/bytesobject.c:1296
#1  0x00007f454398b921 in SWIG_AsCharPtrAndSize (obj=0x0, obj@entry='/etc/yum.repos.d/team\udcc3_epel.repo', cptr=cptr@entry=0x7ffc6ee86290, psize=psize@entry=0x7ffc6ee86298, 
    alloc=alloc@entry=0x7ffc6ee8628c) at /usr/src/debug/libdnf-0.35.1-9.el8_1.x86_64/build-py3/bindings/python/confPYTHON_wrap.cxx:4821
#2  0x00007f454399913a in SWIG_AsPtr_std_string(PyObject*, std::(char, long long, long long, ::string**)) (obj='/etc/yum.repos.d/team\udcc3_epel.repo', val=0x7ffc6ee862f0)
    at /usr/src/debug/libdnf-0.35.1-9.el8_1.x86_64/build-py3/bindings/python/confPYTHON_wrap.cxx:4912
#3  0x00007f454399acd9 in _wrap_ConfigParser_read (args=<optimized out>) at /usr/src/debug/libdnf-0.35.1-9.el8_1.x86_64/build-py3/bindings/python/confPYTHON_wrap.cxx:26409
#4  0x00007f45515a7832 in _PyCFunction_FastCallDict (func_obj=<built-in method ConfigParser_read of module object at remote 0x7f4543c2d5e8>, args=0x7f453dc04a98, nargs=<optimized out>, 
    kwargs=0x0) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Objects/methodobject.c:234
#5  0x00007f45515a7d6d in call_function (pp_stack=0x7ffc6ee86458, oparg=<optimized out>, kwnames=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4851
#6  0x00007f45515e6faa in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:3335
#7  0x00007f455157361a in _PyFunction_FastCall (globals=<optimized out>, nargs=2, args=<optimized out>, co=<optimized out>)
    at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4968
#8  fast_function (func=<optimized out>, stack=0x55742f024700, nargs=2, kwnames=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4968
#9  0x00007f45515a7e52 in call_function (pp_stack=0x7ffc6ee86608, oparg=<optimized out>, kwnames=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4872
#10 0x00007f45515e6faa in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:3335
#11 0x00007f455157361a in _PyFunction_FastCall (globals=<optimized out>, nargs=2, args=<optimized out>, co=<optimized out>)
    at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4968
#12 fast_function (func=<optimized out>, stack=0x55742f375280, nargs=2, kwnames=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4968
#13 0x00007f45515a7e52 in call_function (pp_stack=0x7ffc6ee867b8, oparg=<optimized out>, kwnames=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4872
#14 0x00007f45515e6faa in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:3335
#15 0x00007f45515a8e8f in gen_send_ex (closing=0, exc=<optimized out>, arg=0x0, gen=0x7f453af40a98) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Objects/genobject.c:563
#16 gen_iternext (gen=0x7f453af40a98) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Objects/genobject.c:563
#17 0x00007f45515e73e6 in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:3111
#18 0x00007f45515a8e0f in gen_send_ex (closing=0, exc=<optimized out>, arg=0x0, gen=0x7f453af40b48) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Objects/genobject.c:563
#19 gen_iternext (gen=0x7f453af40b48) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Objects/genobject.c:563
#20 0x00007f45515e73e6 in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:3111
#21 0x00007f45515397db in _PyEval_EvalCodeWithName (_co=<optimized out>, globals=<optimized out>, locals=<optimized out>, args=<optimized out>, argcount=<optimized out>, kwnames=0x0, 
    kwargs=0x55742f2b90f0, kwcount=<optimized out>, kwstep=1, defs=0x7f454df4d5d8, defcount=1, kwdefs=0x0, closure=0x0, name='read_all_repos', qualname='Base.read_all_repos')
    at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4166
#22 0x00007f45515737d0 in fast_function (func=<optimized out>, stack=0x55742f2b90e0, nargs=2, kwnames=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4992
#23 0x00007f45515a7e52 in call_function (pp_stack=0x7ffc6ee86d78, oparg=<optimized out>, kwnames=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4872
#24 0x00007f45515e6faa in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:3335
#25 0x00007f455157361a in _PyFunction_FastCall (globals=<optimized out>, nargs=2, args=<optimized out>, co=<optimized out>)
    at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4968
#26 fast_function (func=<optimized out>, stack=0x55742eec8768, nargs=2, kwnames=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4968
#27 0x00007f45515a7e52 in call_function (pp_stack=0x7ffc6ee86f28, oparg=<optimized out>, kwnames=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4872
#28 0x00007f45515e6faa in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:3335
#29 0x00007f45515397db in _PyEval_EvalCodeWithName (_co=<optimized out>, globals=<optimized out>, locals=<optimized out>, args=<optimized out>, argcount=<optimized out>, kwnames=0x0, 
    kwargs=0x55742f052b98, kwcount=<optimized out>, kwstep=1, defs=0x7f453e340f40, defcount=1, kwdefs=0x0, closure=0x0, name='configure', qualname='Cli.configure')
    at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4166
#30 0x00007f45515737d0 in fast_function (func=<optimized out>, stack=0x55742f052b80, nargs=3, kwnames=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4992
#31 0x00007f45515a7e52 in call_function (pp_stack=0x7ffc6ee87208, oparg=<optimized out>, kwnames=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4872
#32 0x00007f45515e6faa in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:3335
#33 0x00007f455157361a in _PyFunction_FastCall (globals=<optimized out>, nargs=4, args=<optimized out>, co=<optimized out>)
    at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4968
#34 fast_function (func=<optimized out>, stack=0x55742f00ba20, nargs=4, kwnames=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4968
--Type <RET> for more, q to quit, c to continue without paging--c
#35 0x00007f45515a7e52 in call_function (pp_stack=0x7ffc6ee873b8, oparg=<optimized out>, kwnames=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4872
#36 0x00007f45515e6faa in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:3335
#37 0x00007f45515397db in _PyEval_EvalCodeWithName (_co=<optimized out>, globals=<optimized out>, locals=<optimized out>, args=<optimized out>, argcount=<optimized out>, kwnames=0x0, kwargs=0x55742f004318, kwcount=<optimized out>, kwstep=1, defs=0x7f453dbf08d0, defcount=3, kwdefs=0x0, closure=0x0, name='main', qualname='main') at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4166
#38 0x00007f45515737d0 in fast_function (func=<optimized out>, stack=0x55742f004310, nargs=1, kwnames=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4992
#39 0x00007f45515a7e52 in call_function (pp_stack=0x7ffc6ee87698, oparg=<optimized out>, kwnames=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4872
#40 0x00007f45515e6faa in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:3335
#41 0x00007f45515397db in _PyEval_EvalCodeWithName (_co=<optimized out>, globals=<optimized out>, locals=<optimized out>, args=<optimized out>, argcount=<optimized out>, kwnames=0x7f45504491e8, kwargs=0x55742ec2e0f0, kwcount=<optimized out>, kwstep=1, defs=0x7f453dbf4728, defcount=1, kwdefs=0x0, closure=0x0, name='user_main', qualname='user_main') at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4166
#42 0x00007f45515737d0 in fast_function (func=<optimized out>, stack=0x55742ec2e0e8, nargs=1, kwnames=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4992
#43 0x00007f45515a7e52 in call_function (pp_stack=0x7ffc6ee87980, oparg=<optimized out>, kwnames=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4872
#44 0x00007f45515e7f14 in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:3351
#45 0x00007f45515c10c8 in _PyEval_EvalCodeWithName (qualname=0x0, name=<optimized out>, closure=0x0, kwdefs=0x0, defcount=0, defs=0x0, kwstep=2, kwcount=<optimized out>, kwargs=<optimized out>, kwnames=<optimized out>, argcount=<optimized out>, args=<optimized out>, locals=<optimized out>, globals=<optimized out>, _co=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:3902
#46 PyEval_EvalCodeEx (_co=<optimized out>, globals=<optimized out>, locals=<optimized out>, args=<optimized out>, argcount=<optimized out>, kws=<optimized out>, kwcount=0, defs=0x0, defcount=0, kwdefs=0x0, closure=0x0) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:4187
#47 0x00007f45515c1f7b in PyEval_EvalCode (co=co@entry=<code at remote 0x7f4551a42540>, globals=globals@entry={'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <SourceFileLoader(name='__main__', path='/usr/bin/dnf') at remote 0x7f4551a80898>, '__spec__': None, '__annotations__': {}, '__builtins__': <module at remote 0x7f4551b48638>, '__file__': '/usr/bin/dnf', '__cached__': None, 'unicode_literals': <_Feature(optional=(2, 6, 0, 'alpha', 2), mandatory=(3, 0, 0, 'alpha', 0), compiler_flag=131072) at remote 0x7f45503dfdd8>, 'sys': <module at remote 0x7f4551ad4ef8>, 'suppress_keyboard_interrupt_message': <function at remote 0x7f4551ab1e18>, 'here': '/usr/bin', 'main': <module at remote 0x7f453e32f458>}, locals=locals@entry={'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <SourceFileLoader(name='__main__', path='/usr/bin/dnf') at remote 0x7f4551a80898>, '__spec__': None, '__annotations__': {}, '__builtins__': <module at remote 0x7f4551b48638>, '__file__': '/usr/bin/dnf', '__cached__': None, 'unicode_literals': <_Feature(optional=(2, 6, 0, 'alpha', 2), mandatory=(3, 0, 0, 'alpha', 0), compiler_flag=131072) at remote 0x7f45503dfdd8>, 'sys': <module at remote 0x7f4551ad4ef8>, 'suppress_keyboard_interrupt_message': <function at remote 0x7f4551ab1e18>, 'here': '/usr/bin', 'main': <module at remote 0x7f453e32f458>}) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/ceval.c:731
#48 0x00007f4551654282 in run_mod (mod=<optimized out>, filename=<optimized out>, globals={'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <SourceFileLoader(name='__main__', path='/usr/bin/dnf') at remote 0x7f4551a80898>, '__spec__': None, '__annotations__': {}, '__builtins__': <module at remote 0x7f4551b48638>, '__file__': '/usr/bin/dnf', '__cached__': None, 'unicode_literals': <_Feature(optional=(2, 6, 0, 'alpha', 2), mandatory=(3, 0, 0, 'alpha', 0), compiler_flag=131072) at remote 0x7f45503dfdd8>, 'sys': <module at remote 0x7f4551ad4ef8>, 'suppress_keyboard_interrupt_message': <function at remote 0x7f4551ab1e18>, 'here': '/usr/bin', 'main': <module at remote 0x7f453e32f458>}, locals={'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <SourceFileLoader(name='__main__', path='/usr/bin/dnf') at remote 0x7f4551a80898>, '__spec__': None, '__annotations__': {}, '__builtins__': <module at remote 0x7f4551b48638>, '__file__': '/usr/bin/dnf', '__cached__': None, 'unicode_literals': <_Feature(optional=(2, 6, 0, 'alpha', 2), mandatory=(3, 0, 0, 'alpha', 0), compiler_flag=131072) at remote 0x7f45503dfdd8>, 'sys': <module at remote 0x7f4551ad4ef8>, 'suppress_keyboard_interrupt_message': <function at remote 0x7f4551ab1e18>, 'here': '/usr/bin', 'main': <module at remote 0x7f453e32f458>}, flags=<optimized out>, arena=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/pythonrun.c:1025
#49 0x00007f4551655477 in PyRun_FileExFlags (fp=0x55742ec21840, filename_str=<optimized out>, start=<optimized out>, globals={'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <SourceFileLoader(name='__main__', path='/usr/bin/dnf') at remote 0x7f4551a80898>, '__spec__': None, '__annotations__': {}, '__builtins__': <module at remote 0x7f4551b48638>, '__file__': '/usr/bin/dnf', '__cached__': None, 'unicode_literals': <_Feature(optional=(2, 6, 0, 'alpha', 2), mandatory=(3, 0, 0, 'alpha', 0), compiler_flag=131072) at remote 0x7f45503dfdd8>, 'sys': <module at remote 0x7f4551ad4ef8>, 'suppress_keyboard_interrupt_message': <function at remote 0x7f4551ab1e18>, 'here': '/usr/bin', 'main': <module at remote 0x7f453e32f458>}, locals={'__name__': '__main__', '__doc__': None, '__package__': None, '__loader__': <SourceFileLoader(name='__main__', path='/usr/bin/dnf') at remote 0x7f4551a80898>, '__spec__': None, '__annotations__': {}, '__builtins__': <module at remote 0x7f4551b48638>, '__file__': '/usr/bin/dnf', '__cached__': None, 'unicode_literals': <_Feature(optional=(2, 6, 0, 'alpha', 2), mandatory=(3, 0, 0, 'alpha', 0), compiler_flag=131072) at remote 0x7f45503dfdd8>, 'sys': <module at remote 0x7f4551ad4ef8>, 'suppress_keyboard_interrupt_message': <function at remote 0x7f4551ab1e18>, 'here': '/usr/bin', 'main': <module at remote 0x7f453e32f458>}, closeit=1, flags=0x7ffc6ee87c3c) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/pythonrun.c:978
#50 0x00007f4551656f7f in PyRun_SimpleFileExFlags (fp=0x55742ec21840, filename=<optimized out>, closeit=1, flags=0x7ffc6ee87c3c) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Python/pythonrun.c:419
#51 0x00007f455165807b in run_file (p_cf=0x7ffc6ee87c3c, filename=<optimized out>, fp=0x55742ec21840) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Modules/main.c:344
#52 Py_Main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Modules/main.c:814
#53 0x000055742cce0c68 in main (argc=3, argv=0x7ffc6ee87e48) at /usr/src/debug/python3-3.6.8-15.1.el8.x86_64/Programs/python.c:102

(gdb) f 1
#1  0x00007f454398b921 in SWIG_AsCharPtrAndSize (obj=0x0, obj@entry='/etc/yum.repos.d/team\udcc3_epel.repo', cptr=cptr@entry=0x7ffc6ee86290, psize=psize@entry=0x7ffc6ee86298, 
    alloc=alloc@entry=0x7ffc6ee8628c) at /usr/src/debug/libdnf-0.35.1-9.el8_1.x86_64/build-py3/bindings/python/confPYTHON_wrap.cxx:4821
4821	    PyBytes_AsStringAndSize(obj, &cstr, &len);
(gdb) p *cstr
$1 = 72 'H'
(gdb) p *obj
Cannot access memory at address 0x0

--- Additional comment from marek77 on 2020-02-14 13:25:19 UTC ---

The segfault still happens on Fedora 30, but is fixed on Fedora 31:

$ cat /etc/redhat-release 
Fedora release 30 (Thirty)

$ sudo touch '/etc/yum.repos.d/team'$'\303''_epel.repo'

$ sudo dnf repolist
Segmentation fault (core dumped)

$ rpm -q dnf libdnf
dnf-4.2.11-2.fc30.noarch
libdnf-0.35.5-5.fc30.x86_64

=======================================================================

$ cat /etc/redhat-release
Fedora release 31 (Thirty One)

$ sudo touch '/etc/yum.repos.d/team'$'\303''_epel.repo'

$ sudo dnf repolist
Warning: failed loading '/etc/yum.repos.d/team\udcc3_epel.repo', skipping.

<WORKS OK :) >

$ rpm -q dnf libdnf
dnf-4.2.18-1.fc31.noarch
libdnf-0.43.1-2.fc31.x86_64

--- Additional comment from Pavla Kratochvilova on 2020-02-19 09:55:54 UTC ---

The segfault is not dependent on the version of libdnf/dnf, but rather on the version of swig that is used for libdnf build. When I build the latest version of libdnf on Fedora 30 (with swig-3.0.12-26.fc30.x86_64), dnf segfaults, whereas when I build the latest version of libdnf on Fedora 31 (with swig-4.0.1-3.fc31), dnf doesn't segfault.

I will clone this bug for swig with more details.
Comment 1 Pavla Kratochvilova 2020-02-19 09:59:44 UTC 
I belive this bug is fixed in upstream swig because of the following key change in files that were automatically generated by swig:

Version 3.0.12:

#if !defined(SWIG_PYTHON_STRICT_BYTE_CHAR)
    if (!alloc && cptr) {
        /* We can't allow converting without allocation, since the internal
           representation of string in Python 3 is UCS-2/UCS-4 but we require
           a UTF-8 representation.
           TODO(bhy) More detailed explanation */
        return SWIG_RuntimeError;
    }
    obj = PyUnicode_AsUTF8String(obj);    // Note: This returns NULL if there is an exception raised by codec
    if(alloc) *alloc = SWIG_NEWOBJ;
#endif
    PyBytes_AsStringAndSize(obj, &cstr, &len);    // Note: This crashes if obj is NULL

Version 4.0.1:

#if !defined(SWIG_PYTHON_STRICT_BYTE_CHAR)
    if (!alloc && cptr) {
        /* We can't allow converting without allocation, since the internal
           representation of string in Python 3 is UCS-2/UCS-4 but we require
           a UTF-8 representation.
           TODO(bhy) More detailed explanation */
        return SWIG_RuntimeError;
    }
    obj = PyUnicode_AsUTF8String(obj);
    if (!obj)
      return SWIG_TypeError;    // Note: This fixes the bug.
    if (alloc)
      *alloc = SWIG_NEWOBJ;
#endif
    PyBytes_AsStringAndSize(obj, &cstr, &len);


Similar check after the PyUnicode_AsUTF8String call is on multiple places.
Please let me know what additional information you need.
Comment 3 Jitka Plesnikova 2020-02-19 11:45:24 UTC 
Thank you for the report and your analysis.

It was probably fixed by upstream with the commit

commit b0e29fbdf31bb94b11cb8a7cc830b4a76467afa3
Author: William S Fulton <wsf.uk>
Date:   Mon Dec 4 18:41:55 2017 +0000

    Add missing checks for failures in calls to PyUnicode_AsUTF8String.
    
    Previously a seg fault could occur when passing invalid UTF8 strings (low
    surrogates), eg passing u"\udcff" to the C layer (Python 3).

https://github.com/swig/swig/commit/b0e29fbdf31bb94b11cb8a7cc830b4a76467afa3#diff-ba23eb3671d250e6a62261f19f653dd2

It is easy to backport.
Comment 5 Jitka Plesnikova 2020-02-20 11:12:42 UTC 
Created attachment 1664315 [details]
Backported upstream fix
Comment 11 Jitka Plesnikova 2020-03-24 13:50:47 UTC 
It looks good to me.
Comment 14 Jitka Plesnikova 2020-03-30 11:34:00 UTC 
Created attachment 1674698 [details]
swig file
Comment 15 Jitka Plesnikova 2020-03-30 11:34:48 UTC 
Created attachment 1674699 [details]
test file
Comment 17 Jitka Plesnikova 2020-04-07 11:10:43 UTC 
Fixed in

commit 7050872688c2f985d5fffd058f8230e20ab9d084 (HEAD -> stream-3.0-rhel-8.3.0, origin/stream-3.0-rhel-8.3.0)
Author: Jitka Plesnikova <jplesnik>
Date:   Tue Apr 7 10:40:32 2020 +0200

    Resolves: rhbz #1804625
Comment 24 errata-xmlrpc 2020-11-04 02:32:11 UTC 
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 (swig:3.0 bug fix and enhancement update), 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-2020:4633
Note You need to log in before you can comment on or make changes to this bug.