linux-kernel - Re: EXT4 ENOSPC Bug

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <200812100108.04163.andres@anarazel.de>
Date:	Wed, 10 Dec 2008 01:07:57 +0100
From:	Andres Freund <andres@...razel.de>
To:	Theodore Tso <tytso@....edu>
Cc:	adilger@....com, LKML <linux-kernel@...r.kernel.org>,
	linux-ext4@...r.kernel.org,
	"Jonathan Bastien-Filiatrault" <joe@....org>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Subject: Re: EXT4 ENOSPC Bug

Hi Ted,

Very Strange:
I booted (after an crash which I did not see) a somewhat older kernel and I 
once more caught the issue. Unfortunately I do not have your patch in this 
older kernel.

older kernel: 2.6.28-rc5-andres-00070-g4e14e83
kernel I rean whole last week: 2.6.28-rc6-andres-00007-ged31348
There seem to have been no significant ext4 related changes to the kernel  
between those.

for i in `seq 1 1000`;do touch tmp$i;done
touch: cannot touch `tmp139': No space left on device
...

rm tmp*;for i in `seq 1 200`;do dd if=/dev/zero of=tmp$i bs=1024k count=1;done
dd: opening `tmp139': No space left on device
139
..

Various different blocksizes and filesizes all return the same result.

This all hints to the patch Anesh linked. But it is included in 2.6.28-rc5. 
Any idea how that could happen?

The kernel install is just a "make;make install; update-initramfs -c -k `make 
kernelrelease`; update-grub" run...

A short idea how I could verify on binary level what kernelrelease it really 
is?

If a somehow corrupted compile (murked ccache?) is the culprit of this (in 
addition to my inaccuracies) I am very sorry for all your work.

I let this kernel run for the next hours if you want to run some tests...

Thanks,

Andres

Download attachment "signature.asc " of type "application/pgp-signature" (198 bytes)