From: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
To: Luis Chamberlain <mcgrof@kernel.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>,
Christoph Hellwig <hch@infradead.org>,
ast@kernel.org, axboe@kernel.dk, bfields@fieldses.org,
bridge@lists.linux-foundation.org, chainsaw@gentoo.org,
christian.brauner@ubuntu.com, chuck.lever@oracle.com,
davem@davemloft.net, dhowells@redhat.com,
gregkh@linuxfoundation.org, jarkko.sakkinen@linux.intel.com,
jmorris@namei.org, josh@joshtriplett.org, keescook@chromium.org,
keyrings@vger.kernel.org, kuba@kernel.org,
lars.ellenberg@linbit.com, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org,
linux-security-module@vger.kernel.org,
nikolay@cumulusnetworks.com, philipp.reisner@linbit.com,
ravenexp@gmail.com, roopa@cumulusnetworks.com, serge@hallyn.com,
slyfox@gentoo.org, viro@zeniv.linux.org.uk,
yangtiezhu@loongson.cn, netdev@vger.kernel.org,
markward@linux.ibm.com, linux-s390 <linux-s390@vger.kernel.org>
Subject: Re: linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s
Date: Wed, 01 Jul 2020 14:08:57 +0000 [thread overview]
Message-ID: <8d714a23-bac4-7631-e5fc-f97c20a46083@i-love.sakura.ne.jp> (raw)
In-Reply-To: <20200701135324.GS4332@42.do-not-panic.com>
On 2020/07/01 22:53, Luis Chamberlain wrote:
>> Well, it is not br_stp_call_user() but br_stp_start() which is expecting
>> to set sub_info->retval for both KWIFEXITED() case and KWIFSIGNALED() case.
>> That is, sub_info->retval needs to carry raw value (i.e. without "umh: fix
>> processed error when UMH_WAIT_PROC is used" will be the correct behavior).
>
> br_stp_start() doesn't check for the raw value, it just checks for err
> or !err. So the patch, "umh: fix processed error when UMH_WAIT_PROC is
> used" propagates the correct error now.
No. If "/sbin/bridge-stp virbr0 start" terminated due to e.g. SIGSEGV
(for example, by inserting "kill -SEGV $$" into right after "#!/bin/sh" line),
br_stp_start() needs to select BR_KERNEL_STP path. We can't assume that
/sbin/bridge-stp is always terminated by exit() syscall (and hence we can't
ignore KWIFSIGNALED() case in call_usermodehelper_exec_sync()).
WARNING: multiple messages have this Message-ID (diff)
From: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
To: Luis Chamberlain <mcgrof@kernel.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>,
Christoph Hellwig <hch@infradead.org>,
ast@kernel.org, axboe@kernel.dk, bfields@fieldses.org,
bridge@lists.linux-foundation.org, chainsaw@gentoo.org,
christian.brauner@ubuntu.com, chuck.lever@oracle.com,
davem@davemloft.net, dhowells@redhat.com,
gregkh@linuxfoundation.org, jarkko.sakkinen@linux.intel.com,
jmorris@namei.org, josh@joshtriplett.org, keescook@chromium.org,
keyrings@vger.kernel.org, kuba@kernel.org,
lars.ellenberg@linbit.com, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org,
linux-security-module@vger.kernel.org,
nikolay@cumulusnetworks.com, philipp.reisner@linbit.com,
ravenexp@gmail.com, roopa@cumulusnetworks.com, serge@hallyn.com,
slyfox@gentoo.org, viro@zeniv.linux.org.uk,
yangtiezhu@loongson.cn, netdev@vger.kernel.org,
markward@linux.ibm.com, linux-s390 <linux-s390@vger.kernel.org>
Subject: Re: linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected)
Date: Wed, 1 Jul 2020 23:08:57 +0900 [thread overview]
Message-ID: <8d714a23-bac4-7631-e5fc-f97c20a46083@i-love.sakura.ne.jp> (raw)
In-Reply-To: <20200701135324.GS4332@42.do-not-panic.com>
On 2020/07/01 22:53, Luis Chamberlain wrote:
>> Well, it is not br_stp_call_user() but br_stp_start() which is expecting
>> to set sub_info->retval for both KWIFEXITED() case and KWIFSIGNALED() case.
>> That is, sub_info->retval needs to carry raw value (i.e. without "umh: fix
>> processed error when UMH_WAIT_PROC is used" will be the correct behavior).
>
> br_stp_start() doesn't check for the raw value, it just checks for err
> or !err. So the patch, "umh: fix processed error when UMH_WAIT_PROC is
> used" propagates the correct error now.
No. If "/sbin/bridge-stp virbr0 start" terminated due to e.g. SIGSEGV
(for example, by inserting "kill -SEGV $$" into right after "#!/bin/sh" line),
br_stp_start() needs to select BR_KERNEL_STP path. We can't assume that
/sbin/bridge-stp is always terminated by exit() syscall (and hence we can't
ignore KWIFSIGNALED() case in call_usermodehelper_exec_sync()).
WARNING: multiple messages have this Message-ID (diff)
From: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
To: Luis Chamberlain <mcgrof@kernel.org>
Cc: ast@kernel.org, jarkko.sakkinen@linux.intel.com,
philipp.reisner@linbit.com, bfields@fieldses.org,
keyrings@vger.kernel.org, christian.brauner@ubuntu.com,
yangtiezhu@loongson.cn, linux-s390 <linux-s390@vger.kernel.org>,
bridge@lists.linux-foundation.org, jmorris@namei.org,
Christoph Hellwig <hch@infradead.org>,
Christian Borntraeger <borntraeger@de.ibm.com>,
kuba@kernel.org, serge@hallyn.com, keescook@chromium.org,
nikolay@cumulusnetworks.com, roopa@cumulusnetworks.com,
josh@joshtriplett.org, slyfox@gentoo.org,
viro@zeniv.linux.org.uk, axboe@kernel.dk, dhowells@redhat.com,
linux-nfs@vger.kernel.org, chainsaw@gentoo.org,
ravenexp@gmail.com, gregkh@linuxfoundation.org,
markward@linux.ibm.com, linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org, chuck.lever@oracle.com,
netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org,
lars.ellenberg@linbit.com, davem@davemloft.net
Subject: Re: [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected)
Date: Wed, 1 Jul 2020 23:08:57 +0900 [thread overview]
Message-ID: <8d714a23-bac4-7631-e5fc-f97c20a46083@i-love.sakura.ne.jp> (raw)
In-Reply-To: <20200701135324.GS4332@42.do-not-panic.com>
On 2020/07/01 22:53, Luis Chamberlain wrote:
>> Well, it is not br_stp_call_user() but br_stp_start() which is expecting
>> to set sub_info->retval for both KWIFEXITED() case and KWIFSIGNALED() case.
>> That is, sub_info->retval needs to carry raw value (i.e. without "umh: fix
>> processed error when UMH_WAIT_PROC is used" will be the correct behavior).
>
> br_stp_start() doesn't check for the raw value, it just checks for err
> or !err. So the patch, "umh: fix processed error when UMH_WAIT_PROC is
> used" propagates the correct error now.
No. If "/sbin/bridge-stp virbr0 start" terminated due to e.g. SIGSEGV
(for example, by inserting "kill -SEGV $$" into right after "#!/bin/sh" line),
br_stp_start() needs to select BR_KERNEL_STP path. We can't assume that
/sbin/bridge-stp is always terminated by exit() syscall (and hence we can't
ignore KWIFSIGNALED() case in call_usermodehelper_exec_sync()).
next prev parent reply other threads:[~2020-07-01 14:08 UTC|newest]
Thread overview: 124+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-10 15:49 [PATCH 0/5] kmod/umh: a few fixes Luis R. Rodriguez
2020-06-10 15:49 ` [Bridge] " Luis R. Rodriguez
2020-06-10 15:49 ` [PATCH 1/5] selftests: kmod: Use variable NAME in kmod_test_0001() Luis R. Rodriguez
2020-06-10 15:49 ` [Bridge] " Luis R. Rodriguez
2020-06-10 15:49 ` [PATCH 2/5] kmod: Remove redundant "be an" in the comment Luis R. Rodriguez
2020-06-10 15:49 ` [Bridge] " Luis R. Rodriguez
2020-06-10 15:49 ` [PATCH 3/5] test_kmod: Avoid potential double free in trigger_config_run_type() Luis R. Rodriguez
2020-06-10 15:49 ` [Bridge] " Luis R. Rodriguez
2020-06-10 15:49 ` [PATCH 4/5] umh: fix processed error when UMH_WAIT_PROC is used Luis R. Rodriguez
2020-06-10 15:49 ` [Bridge] " Luis R. Rodriguez
2020-06-10 15:49 ` Luis R. Rodriguez
2020-06-23 14:11 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x Christian Borntraeger
2020-06-23 14:12 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Christian Borntraeger
2020-06-23 14:11 ` Christian Borntraeger
2020-06-23 14:23 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Christian Borntraeger
2020-06-23 15:09 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Christian Borntraeger
2020-06-23 14:23 ` Christian Borntraeger
2020-06-24 11:11 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Christian Borntraeger
2020-06-24 11:12 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Christian Borntraeger
2020-06-24 11:11 ` Christian Borntraeger
2020-06-24 12:05 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Luis Chamberlain
2020-06-24 12:05 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Luis Chamberlain
2020-06-24 12:05 ` Luis Chamberlain
2020-06-24 13:17 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Luis Chamberlain
2020-06-24 13:17 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Luis Chamberlain
2020-06-24 13:17 ` Luis Chamberlain
2020-06-24 16:13 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Luis Chamberlain
2020-06-24 16:13 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Luis Chamberlain
2020-06-24 16:13 ` Luis Chamberlain
2020-06-24 14:43 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Christoph Hellwig
2020-06-24 14:43 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Christoph Hellwig
2020-06-24 14:43 ` Christoph Hellwig
2020-06-24 15:54 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Christian Borntraeger
2020-06-24 15:56 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Christian Borntraeger
2020-06-24 15:54 ` Christian Borntraeger
2020-06-24 16:09 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Luis Chamberlain
2020-06-24 16:09 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Luis Chamberlain
2020-06-24 16:09 ` Luis Chamberlain
2020-06-24 17:58 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Christian Borntraeger
2020-06-24 17:59 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Christian Borntraeger
2020-06-24 17:58 ` Christian Borntraeger
2020-06-24 18:09 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Christian Borntraeger
2020-06-24 18:10 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Christian Borntraeger
2020-06-24 18:09 ` Christian Borntraeger
2020-06-24 18:32 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Christian Borntraeger
2020-06-24 18:32 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Christian Borntraeger
2020-06-24 18:32 ` Christian Borntraeger
2020-06-24 18:37 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Christian Borntraeger
2020-06-24 18:38 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Christian Borntraeger
2020-06-24 18:37 ` Christian Borntraeger
2020-06-25 13:26 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Christian Borntraeger
2020-06-25 13:27 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Christian Borntraeger
2020-06-25 13:26 ` Christian Borntraeger
2020-06-26 2:54 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Luis Chamberlain
2020-06-26 2:54 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Luis Chamberlain
2020-06-26 2:54 ` Luis Chamberlain
2020-06-26 5:22 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Christian Borntraeger
2020-06-26 5:24 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Christian Borntraeger
2020-06-26 5:22 ` Christian Borntraeger
2020-06-26 9:00 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Christoph Hellwig
2020-06-26 9:00 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Christoph Hellwig
2020-06-26 9:00 ` Christoph Hellwig
2020-06-26 11:40 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Luis Chamberlain
2020-06-26 11:40 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Luis Chamberlain
2020-06-26 11:40 ` Luis Chamberlain
2020-06-26 11:50 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Luis Chamberlain
2020-06-26 11:50 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Luis Chamberlain
2020-06-26 11:50 ` Luis Chamberlain
2020-06-30 17:57 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Luis Chamberlain
2020-06-30 17:57 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Luis Chamberlain
2020-06-30 17:57 ` Luis Chamberlain
2020-07-01 10:08 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Christian Borntraeger
2020-07-01 10:08 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Christian Borntraeger
2020-07-01 10:08 ` Christian Borntraeger
2020-07-01 13:24 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Tetsuo Handa
2020-07-01 13:24 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Tetsuo Handa
2020-07-01 13:24 ` Tetsuo Handa
2020-07-01 13:53 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Luis Chamberlain
2020-07-01 13:53 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Luis Chamberlain
2020-07-01 13:53 ` Luis Chamberlain
2020-07-01 14:08 ` Tetsuo Handa [this message]
2020-07-01 14:08 ` [Bridge] " Tetsuo Handa
2020-07-01 14:08 ` Tetsuo Handa
2020-07-01 15:38 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Luis Chamberlain
2020-07-01 15:39 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Luis Chamberlain
2020-07-01 15:38 ` Luis Chamberlain
2020-07-01 15:48 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Christian Borntraeger
2020-07-01 15:49 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Christian Borntraeger
2020-07-01 15:48 ` Christian Borntraeger
2020-07-01 15:58 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Luis Chamberlain
2020-07-01 15:58 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Luis Chamberlain
2020-07-01 15:58 ` Luis Chamberlain
2020-07-01 16:01 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Christian Borntraeger
2020-07-01 16:03 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Christian Borntraeger
2020-07-01 16:01 ` Christian Borntraeger
2020-07-02 4:26 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Tetsuo Handa
2020-07-02 4:26 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Tetsuo Handa
2020-07-02 4:26 ` Tetsuo Handa
2020-07-02 19:46 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Luis Chamberlain
2020-07-02 19:47 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Luis Chamberlain
2020-07-02 19:46 ` Luis Chamberlain
2020-07-03 0:52 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Tetsuo Handa
2020-07-03 0:52 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Tetsuo Handa
2020-07-03 0:52 ` Tetsuo Handa
2020-07-03 13:28 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Luis Chamberlain
2020-07-03 13:28 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Luis Chamberlain
2020-07-03 13:28 ` Luis Chamberlain
2020-07-01 15:26 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Christian Borntraeger
2020-07-01 15:27 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Christian Borntraeger
2020-07-01 15:26 ` Christian Borntraeger
2020-07-01 13:46 ` linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s Luis Chamberlain
2020-07-01 13:46 ` [Bridge] linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Luis Chamberlain
2020-07-01 13:46 ` Luis Chamberlain
2020-06-10 15:49 ` [PATCH 5/5] selftests: simplify kmod failure value Luis R. Rodriguez
2020-06-10 15:49 ` [Bridge] " Luis R. Rodriguez
2020-06-10 15:49 ` Luis R. Rodriguez
2020-06-18 0:43 ` [PATCH 0/5] kmod/umh: a few fixes Andrew Morton
2020-06-18 0:43 ` [Bridge] " Andrew Morton
2020-06-18 0:43 ` Andrew Morton
2020-06-19 20:46 ` Luis Chamberlain
2020-06-19 20:46 ` [Bridge] " Luis Chamberlain
2020-06-19 20:46 ` Luis Chamberlain
2020-06-19 21:07 ` Luis Chamberlain
2020-06-19 21:07 ` [Bridge] " Luis Chamberlain
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