From: Herbert Xu <herbert@gondor.apana.org.au>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
gibbs@scsiguy.com
Subject: [BUG] AIC7*** SMP deadlock in ahc_linux_free_device
Date: Tue, 17 Feb 2004 21:27:32 +1100 [thread overview]
Message-ID: <20040217102732.GA21221@gondor.apana.org.au> (raw)
Hi:
This bug was discovered by Alex Samad.
The del_timer_sync call in ahc_linux_free_device added in 2.5.67
leads to an SMP deadlock when the function is called from the timer
itself in ahc_linux_dev_timed_unfreeze.
I haven't dug too deeply but it seems that there are also possible
races where ahc_linux_free_device can be called twice on the same
dev. Once from the timer and then again from a non-timer location.
Cheers,
--
Debian GNU/Linux 3.0 is out! ( http://www.debian.org/ )
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
next reply other threads:[~2004-02-17 10:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-17 10:27 Herbert Xu [this message]
2004-02-18 1:23 ` Andrew Morton
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