linux-ext4 - [Bug 207729] Mounting EXT4 with data_err=abort does not abort journal on data block write failure

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]

Date:   Mon, 27 Jul 2020 20:41:21 +0000
From:   bugzilla-daemon@...zilla.kernel.org
To:     linux-ext4@...r.kernel.org
Subject: [Bug 207729] Mounting EXT4 with data_err=abort does not abort
 journal on data block write failure

https://bugzilla.kernel.org/show_bug.cgi?id=207729

--- Comment #3 from Anthony Rebello (rebello.anthony@...il.com) ---
Hi Jan,

Thank you for your reply.

I've changed the workload to perform appends rather than in-place updates.

Appending sufficient data will cause a new block to be allocated.

On fsync, this newly allocated data block will be written out and in ordered
mode,
the journal entry will contain the block bitmap (with the bit set for the newly
allocated block) and the inode table that maps the offset to this block.

In this particular case, if `data_err=abort` is enabled, the journal should
abort when it fails to write the newly allocated data block.

However, that doesn't seem to be the case. I've attached an updated TGZ
containing the append workload.

The bitmap has the block set, the inode table still points to the block, but
the block has not been overwritten with the intended data. It still contains
it's old contents.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.