linux-kernel - [PATCH selftest/net/af_unix 1/1] Fix size of parameter to connect()

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Date:   Sat, 7 Jan 2023 02:58:28 +0900
From:   Kuniyuki Iwashima <kuniyu@...zon.com>
To:     <mirsad.todorovac@....unizg.hr>
CC:     <davem@...emloft.net>, <edumazet@...gle.com>, <fw@...len.de>,
        <kuba@...nel.org>, <kuniyu@...zon.co.jp>,
        <linux-kernel@...r.kernel.org>, <linux-kselftest@...r.kernel.org>,
        <netdev@...r.kernel.org>, <pabeni@...hat.com>, <shuah@...nel.org>,
        <kuniyu@...zon.com>
Subject: [PATCH selftest/net/af_unix 1/1] Fix size of parameter to connect()

Hi,

Thanks for the patch.

From:   Mirsad Goran Todorovac <mirsad.todorovac@....unizg.hr>
Date:   Fri, 6 Jan 2023 18:18:58 +0100
> From: Mirsad Goran Todorovac <mirsad.todorovac@....unizg.hr>
> 
> Adjust size parameter in connect() to match the type of the parameter, to fix "No such file or directory"
> error in selftests/net/af_unix/test_oob_unix.c:127.

Could you wrap the changelog to 75 chars except for log (strace below) ?
checkpatch.pl will help.

  $ git show HEAD --format=email | ./scripts/checkpatch.pl


> 
> The existing code happens to work provided that the autogenerated pathname is shorter than
> sizeof (struct sockaddr), which is why it hasn't been noticed earlier.
> 
> Visible from the trace excerpt:
> 
> bind(3, {sa_family=AF_UNIX, sun_path="unix_oob_453059"}, 110) = 0
> clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7fa6a6577a10) = 453060
> [pid <child>] connect(6, {sa_family=AF_UNIX, sun_path="unix_oob_45305"}, 16) = -1 ENOENT (No such file or directory)
> 
> BUG: The filename is trimmed to sizeof (struct sockaddr).
> 
> The patch is generated against the "vanilla" torvalds mainline tree 6.2-rc2.

Every patch that fixes networking code has to be applied cleanly on net.git.
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/

But the patch can not be applied to net.git.
Could you check this ?
https://patchwork.kernel.org/project/netdevbpf/patch/bd7ff00a-6892-fd56-b3ca-4b3feb6121d8@alu.unizg.hr/

Also, the mail title should be

  [PATCH Tree Version Nth/Total] subsystem: Description.

Next time, Tree is net and Version is v2, and we need not write 1/1, so the
subject should be

  [PATCH net v2] af_unix: selftest: Fix size of parameter to connect()

Please see here for details.
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/tree/Documentation/process/maintainer-netdev.rst


> 
> Thanks and regards,
> Mirsad Todorovac

You can remove these lines.


> 
> Reported-by: Mirsad Goran Todorovac <mirsad.todorovac@....unizg.hr>

In this case, you are the reporter and the author of the patch, so the
Reported-by tag is not needed.  Instead, you have to add your SOB tag.

  Signed-off-by: Mirsad Goran Todorovac <mirsad.todorovac@....unizg.hr>


> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Eric Dumazet <edumazet@...gle.com>
> Cc: Jakub Kicinski <kuba@...nel.org>
> Cc: Paolo Abeni <pabeni@...hat.com>
> Cc: Shuah Khan <shuah@...nel.org>
> Cc: Kuniyuki Iwashima <kuniyu@...zon.co.jp>
> Cc: Florian Westphal <fw@...len.de>
> Reviewed-by: Florian Westphal <fw@...len.de>

Please add Fixes tag as I said here.
https://lore.kernel.org/netdev/20230103111335.81600-1-kuniyu@amazon.com/#r

Thank you,
Kuniyuki


> 
> ---
>   tools/testing/selftests/net/af_unix/test_unix_oob.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/net/af_unix/test_unix_oob.c b/tools/testing/selftests/net/af_unix/test_unix_oob.c
> index b57e91e1c3f2..532459a15067 100644
> --- a/tools/testing/selftests/net/af_unix/test_unix_oob.c
> +++ b/tools/testing/selftests/net/af_unix/test_unix_oob.c
> @@ -124,7 +124,7 @@ void producer(struct sockaddr_un *consumer_addr)
> 
>          wait_for_signal(pipefd[0]);
>          if (connect(cfd, (struct sockaddr *)consumer_addr,
> -                    sizeof(struct sockaddr)) != 0) {
> +                    sizeof(*consumer_addr)) != 0) {
>                  perror("Connect failed");
>                  kill(0, SIGTERM);
>                  exit(1);
> 
> --
> Mirsad Goran Todorovac
> Sistem inženjer
> Grafički fakultet | Akademija likovnih umjetnosti
> Sveučilište u Zagrebu
> -- 
> System engineer
> Faculty of Graphic Arts | Academy of Fine Arts
> University of Zagreb, Republic of Croatia
> The European Union