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] [day] [month] [year] [list]
Date:   Thu, 14 Jul 2022 10:57:52 -0400
From:   "Theodore Ts'o" <>
Cc:     "Theodore Ts'o" <>,
Subject: Re: [PATCH] ext4: fix extent status tree race in writeback error recovery path

On Wed, 15 Jun 2022 12:05:30 -0400, Eric Whitney wrote:
> A race can occur in the unlikely event ext4 is unable to allocate a
> physical cluster for a delayed allocation in a bigalloc file system
> during writeback.  Failure to allocate a cluster forces error recovery
> that includes a call to mpage_release_unused_pages().  That function
> removes any corresponding delayed allocated blocks from the extent
> status tree.  If a new delayed write is in progress on the same cluster
> simultaneously, resulting in the addition of an new extent containing
> one or more blocks in that cluster to the extent status tree, delayed
> block accounting can be thrown off if that delayed write then encounters
> a similar cluster allocation failure during future writeback.
> [...]

Applied, thanks!

[1/1] ext4: fix extent status tree race in writeback error recovery path
      commit: 8e469e57340049d4735b71660d29bd4fd3ae1607

Best regards,
Theodore Ts'o <>

Powered by blists - more mailing lists