linux-kernel - [BUG] JFFS2 power loss recovery issues in 2.6.25, 2.6.26-rc

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 for Android: free password hash cracker in your pocket

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

Date:	Thu, 29 May 2008 12:38:57 +0100 (BST)
From:	Alexey Korolev <akorolev@...radead.org>
To:	dwmw2@...radead.org, linux-mtd@...ts.infradead.org
cc:	linux-kernel@...r.kernel.org
Subject: [BUG] JFFS2 power loss recovery issues in 2.6.25, 2.6.26-rc

Hi, 

One of recent patches broke JFFS2 power loss recoverability.
We faced the issue in Linux 2.6.25 and 2.6.26-rc but not in 2.6.24,
2.6.23.

If to reboot platform during file write. And try to read it again rest
of file will contain trash. 
Issue is well reproducible on NAND, especially if to delete large file
before write and reboot.

We made some investigations for this issue and found commit number which
breaks JFFS2 power loss recoverability.
It is:  [JFFS2] Improve getdents vs. f_pos handling on NOR flash.
        http://git.infradead.org/mtd-2.6.git?a=commitdiff;h=15953580e79b58caefb107e77f218e009b9992e6

Currently we don't know why it breaks JFFS2 and how it could be fixed
except roll back. 
So I would much appreciate any ideas on how it could be fixed. 

Thanks

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/