tree 39c6923890c28fa921f3fc5a462af75f165424a3
parent b684e2614e114803dfa4dc440246f5adedc37653
author Theodore Ts'o <tytso@mit.edu> 1529206919 -0400
committer Todd Kjos <tkjos@google.com> 1551893902 -0800

ext4: avoid running out of journal credits when appending to an inline file

commit 8bc1379b82b8e809eef77a9fedbb75c6c297be19 upstream.

Use a separate journal transaction if it turns out that we need to
convert an inline file to use an data block.  Otherwise we could end
up failing due to not having journal credits.

This addresses CVE-2018-10883.

https://bugzilla.kernel.org/show_bug.cgi?id=200071

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
[fengc@google.com: 4.4 backport: adjust context]
Signed-off-by: Chenbo Feng <fengc@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>