From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Hillf Danton <hdanton@sina.com>
Cc: syzbot <syzbot+10b4363fb0f46527f3f3@syzkaller.appspotmail.com>,
linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [sound?] possible deadlock in __snd_pcm_lib_xfer (2)
Date: Wed, 3 Sep 2025 16:59:05 +0200 [thread overview]
Message-ID: <20250903145905.r7Ak4Wya@linutronix.de> (raw)
In-Reply-To: <20250830065638.6116-1-hdanton@sina.com>
On 2025-08-30 14:56:37 [+0800], Hillf Danton wrote:
> > syz.0.46/6843 is trying to acquire lock:
> > ffff8880b8823d90 ((softirq_ctrl.lock)){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:44 [inline]
> > ffff8880b8823d90 ((softirq_ctrl.lock)){+.+.}-{3:3}, at: __local_bh_disable_ip+0x264/0x400 kernel/softirq.c:168
> >
> Given softirq_ctrl is percpu, this report is false positive.
No. This can happen on a single CPU.
Sebastian
next prev parent reply other threads:[~2025-09-03 14:59 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-29 18:38 syzbot
2025-08-30 0:06 ` syzbot
2025-09-04 10:20 ` Sebastian Andrzej Siewior
2025-09-04 10:38 ` Takashi Iwai
2025-09-15 15:28 ` [PATCH] ALSA: pcm: Disable bottom softirqs as part of spin_lock_irq() on PREEMPT_RT Sebastian Andrzej Siewior
2025-09-16 9:43 ` Takashi Iwai
2025-09-16 12:23 ` Sebastian Andrzej Siewior
2025-08-30 0:45 ` [syzbot] [sound?] possible deadlock in __snd_pcm_lib_xfer (2) Hillf Danton
2025-08-30 3:03 ` syzbot
2025-08-30 6:56 ` Hillf Danton
2025-09-03 14:59 ` Sebastian Andrzej Siewior [this message]
2025-09-04 1:05 ` Hillf Danton
2025-09-04 6:12 ` Sebastian Andrzej Siewior
2025-09-05 3:04 ` Hillf Danton
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20250903145905.r7Ak4Wya@linutronix.de \
--to=bigeasy@linutronix.de \
--cc=hdanton@sina.com \
--cc=linux-kernel@vger.kernel.org \
--cc=syzbot+10b4363fb0f46527f3f3@syzkaller.appspotmail.com \
--cc=syzkaller-bugs@googlegroups.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®