netdev - Re: [PATCH 6/7] selftest/bpf: remove redundant parenthesis

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 12 Dec 2018 21:15:52 +0000
From:   Edward Cree <ecree@...arflare.com>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Alice Ferrazzi <alice.ferrazzi@...il.com>
CC:     <ast@...nel.org>, <daniel@...earbox.net>, <shuah@...nel.org>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 6/7] selftest/bpf: remove redundant parenthesis

On 12/12/18 19:04, Jakub Kicinski wrote:
> On Tue, 11 Dec 2018 20:56:06 +0900, Alice Ferrazzi wrote:
>> Signed-off-by: Alice Ferrazzi <alice.ferrazzi@...il.com>
>> ---
>>  tools/testing/selftests/bpf/test_offload.py | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/tools/testing/selftests/bpf/test_offload.py b/tools/testing/selftests/bpf/test_offload.py
>> index 0f9130ebfd2c..b06cc0eea0eb 100755
>> --- a/tools/testing/selftests/bpf/test_offload.py
>> +++ b/tools/testing/selftests/bpf/test_offload.py
>> @@ -140,7 +140,7 @@ def cmd_result(proc, include_stderr=False, fail=False):
>>  
>>  
>>  def rm(f):
>> -    cmd("rm -f %s" % (f))
>> +    cmd("rm -f %s" % f)
>>      if f in files:
>>          files.remove(f)
>>  
> Is this in PEP8, too?
I don't know, but it shouldn't be.
If f is a sequence type, both the old and new code can break here,
 throwing a TypeError.  It should be cmd("rm -f %s" % (f,)).  The
 presence of the brackets suggests to me that that's what the
 original author intended.
Now, it's unlikely that we'd ever want to pass a list or tuple
 here, since 'rm' wouldn't understand the result, but the proper
 way to deal with that is an assertion with a meaningful message,
 since the TypeError here will have the non-obvious message "not
 all arguments converted during string formatting".

-Ed