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Re: kern/46749: Accessing to ld0 at sdmmc0 causes kernel panic on NetBSD/i386 current
The following reply was made to PR kern/46749; it has been noted by GNATS.
From: David Holland <dholland-bugs%netbsd.org@localhost>
Subject: Re: kern/46749: Accessing to ld0 at sdmmc0 causes kernel panic on
Date: Sat, 28 Jul 2012 17:33:08 +0000
On Sat, Jul 28, 2012 at 05:25:00PM +0000, ryoon%NetBSD.org@localhost wrote:
> When I access to /dev/ld0e on ld0 at sdmmc0, kernel panics.
> SD card is formatted as ffs.
How repeatable is it?
> % crash -M netbsd.4.core -N netbsd.4
> Crash version 6.99.10, image version 6.99.10.
> System panicked: pool_get(ffsdino2): free list modified: magic=0; page
0xc280f000; item addr 0xc280fe00
> Backtrace from time of crash is available.
So it isn't (probably) the access to the thing that's the problem;
mounting it corrupted the ffs dinode pool, and then it crashes the
next time you go there.
If it's repeatable, my inclination would be to sprinkle the mount code
with integrity checks on that pool to figure out where it's getting
trashed. But I don't know the pool interface for that offhand.
David A. Holland
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