linux-kernel - Re: [PATCH v2] io_uring: fix two assignments in if conditions

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 for Android: free password hash cracker in your pocket

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

Message-ID: <EF99381C-E842-49AE-A683-B8EABD1612A0@gmail.com>
Date:   Thu, 03 Nov 2022 10:50:32 +0800
From:   Xinghui Li <korantwork@...il.com>
To:     Jens Axboe <axboe@...nel.dk>, <asml.silence@...il.com>
CC:     <linux-kernel@...r.kernel.org>, <io-uring@...r.kernel.org>,
        Xinghui Li <korantli@...cent.com>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v2] io_uring: fix two assignments in if conditions

在 2022/11/2 22:19，“Jens Axboe”<axboe@...nel.dk> 写入:

>    On 11/2/22 2:25 AM, korantwork@...il.com wrote:
>    > From: Xinghui Li <korantli@...cent.com>
>    > 
>    > Fixs two error:
>    > 
>    > "ERROR: do not use assignment in if condition
>    > 130: FILE: io_uring/net.c:130:
>    > +       if (!(issue_flags & IO_URING_F_UNLOCKED) &&
>    > 
>    > ERROR: do not use assignment in if condition
>    > 599: FILE: io_uring/poll.c:599:
>    > +       } else if (!(issue_flags & IO_URING_F_UNLOCKED) &&"
>    > reported by checkpatch.pl in net.c and poll.c . 
>
>    I'm not super excited about this patch as the previous one
>    wasn't even compiled? Did you test this one, compile and runtime?
>

First of all, I'm really really really SORRY for the last stupid warning and my careless. 
But I did make kernel and install it in my device. Also, I did the fio test with polling. However, there is no warning be reported by 'make' command. 
But when I check the patch code with 'smatch', I did find that warning. I realized how stupid that mistake was.... 
So, in addition to compiling and installing this kernel, I also checked the code using the static analysis tool this time. There is no new error or warning.
"
make -j64 CHECK="~/workspace/smatch/smatch" C=1
  DESCEND objtool
  CALL    scripts/checksyscalls.sh
  CC      io_uring/net.o
  CC      io_uring/poll.o
  CHECK   io_uring/poll.c
io_uring/poll.c: note: in included file (through io_uring/io_uring.h):
io_uring/slist.h:138:29: warning: no newline at end of file
  CHECK   io_uring/net.c
io_uring/poll.c: note: in included file (through include/trace/events/io_uring.h):
./include/linux/io_uring_types.h:151:37: warning: array of flexible structures
io_uring/net.c: note: in included file (through io_uring/io_uring.h):
io_uring/slist.h:138:29: warning: no newline at end of file
io_uring/net.c: note: in included file (through io_uring/io_uring.h):
./include/linux/io_uring_types.h:151:37: warning: array of flexible structures
...
  BUILD   arch/x86/boot/bzImage
Kernel: arch/x86/boot/bzImage is ready  (#10)
" 

Again, I am ashamed of the previous mistake. And I totally understand if you reject this one.