linux-kernel - PROBLEM: 2.6.25-rc1-git2 freezes when accessing external USB hard disk (ehci-hcd)

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Date:	Wed, 13 Feb 2008 23:38:57 +0200
From:	Linas Žvirblis <0x0007@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: PROBLEM: 2.6.25-rc1-git2 freezes when accessing external USB hard
 disk (ehci-hcd)

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Hello,

I am experiencing a complete system freeze when trying to access
external hard disk connected via SATA to USB adapter. The disk is LUKS
encrypted, so all operations I describe below were performed via mapper
device.

I am not sure this is 100% reproducible, as the disk was mounted for
more than 12 hour before the freeze happened. I recall browsing it, and
opening some files.

Freeze 1: Happened when I tried to search the disk. No traces of
anything suspicious in the logs.

Freeze 2: Happened when I tried to fsck the disk. This time I found a
"WARNING: at drivers/usb/host/ehci-hcd.c:287" in the system log.

On both occasion the freeze was almost instant, and the system did not
respond even to magic SysRq key combinations. Did not try to reproduce
this more.

This does not happen with 2.6.24.2 or earlier kernels.

I am not subscribed, so please keep me CC'ed.

Regards,
Linas

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View attachment "cpuinfo.txt" of type "text/plain" (1636 bytes)

View attachment "lspci.txt" of type "text/plain" (862 bytes)

View attachment "messages.txt" of type "text/plain" (40836 bytes)

View attachment "ver_linux.txt" of type "text/plain" (467 bytes)