Bug#1107479: util-linux: blkid hangs forever after inserting a DVD-RAM

From	Salvatore Bonaccorso <carnil@debian.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1107479: util-linux: blkid hangs forever after inserting a DVD-RAM
Date	2025-06-09 09:40 +0200
Message-ID	<KVFgR-9iPg-9@gated-at.bofh.it> (permalink)
References	<KVikh-94jn-1@gated-at.bofh.it> <KVikh-94jn-1@gated-at.bofh.it> <KVmnT-96PI-3@gated-at.bofh.it> <KVikh-94jn-1@gated-at.bofh.it> <KVmnT-96PI-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Control: tags -1 + moreinfo

Hi Roland,

On Sun, Jun 08, 2025 at 01:24:55PM +0200, Chris Hofstaedtler wrote:
> Control: reassign -1 src:linux
> 
> On Sun, Jun 08, 2025 at 08:59:22AM +0200, Roland Sommer wrote:
> > blkid works all the time as expected but hangs forever after inserting any DVD-
> > RAM in the drive. dmesg then reports every approx. 120s (up to 10 times):
> > 
> > [  363.635218] INFO: task blkid:2224 blocked for more than 120 seconds.
> > [  363.635232]       Tainted: P           OE      6.1.0-37-amd64 #1 Debian
> > 6.1.140-1
> > [  363.635235] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
> > message.
> > [  363.635238] task:blkid           state:D stack:0     pid:2224  ppid:2216
> > flags:0x00004002
> > [  363.635245] Call Trace:
> > [  363.635247]  <TASK>
> > [  363.635252]  __schedule+0x34d/0x9e0
> > [  363.635266]  schedule+0x5a/0xd0
> > [  363.635271]  schedule_preempt_disabled+0x11/0x20
> > [  363.635276]  __mutex_lock.constprop.0+0x399/0x700
> > [  363.635283]  pkt_ioctl+0x42/0x120 [pktcdvd]
> > [  363.635294]  pkt_ioctl+0xce/0x120 [pktcdvd]
> > [  363.635302]  ? do_syscall_64+0x61/0xb0
> > [  363.635308]  ? do_filp_open+0xaf/0x160
> > [  363.635313]  blkdev_ioctl+0x133/0x270
> 
> Looks like pktcdvd isn't returning to userspace. Reassigning to the 
> kernel, as blkid won't be able to do anything about that. Might also 
> be a hardware issue if it works elsewhere?

Please provide as well as full boot log up to when triggering the
issue so we can see more context.

Regards,
Salvatore

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Bug#1107479: util-linux: blkid hangs forever after inserting a DVD-RAM Salvatore Bonaccorso <carnil@debian.org> - 2025-06-09 09:40 +0200
  Processed: Re: Bug#1107479: util-linux: blkid hangs forever after  inserting a DVD-RAM "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-06-09 09:40 +0200

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