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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: Ryo ONODERA <ryo_on%yk.rim.or.jp@localhost>
To: gnats-bugs%NetBSD.org@localhost, dholland-bugs%NetBSD.org@localhost
Subject: Re: kern/46749: Accessing to ld0 at sdmmc0 causes kernel panic on
Date: Sun, 29 Jul 2012 02:46:15 +0900 (JST)
From: David Holland <dholland-bugs%NetBSD.org@localhost>, Date: Sat, 28 Jul
2012 17:35:02 +0000 (UTC)
> The following reply was made to PR kern/46749; it has been noted by GNATS.
> From: David Holland <dholland-bugs%netbsd.org@localhost>
> To: gnats-bugs%NetBSD.org@localhost
> Subject: Re: kern/46749: Accessing to ld0 at sdmmc0 causes kernel panic on
> NetBSD/i386 current
> 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.
> oh wonderful...
> 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.
> > [...]
> at sys_execve+0x30
> 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.
It is repeatable. Every time, kernel panics.
At least, I have 5 cores in /var/crash.
But I cannot provide first error message, it is lost.
I suspect first error message is different from the message above.
I cannot confirm whether filesystem is broken or not.
But I will newsfs my SDHC card again.
Ryo ONODERA // ryo_on%yk.rim.or.jp@localhost
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