From: Vegard Nossum <vegard.nossum@oracle.com>
Date: Fri, 11 Dec 2015 14:54:16 +0000 (+0100)
Subject: udf: limit the maximum number of indirect extents in a row
X-Git-Tag: v3.2.77~67
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=ef16fa90c41f032db95b7aae74e4a6ad21a283e9;hp=ef16fa90c41f032db95b7aae74e4a6ad21a283e9;ds=sidebyside

udf: limit the maximum number of indirect extents in a row

commit b0918d9f476a8434b055e362b83fa4fd1d462c3f upstream.

udf_next_aext() just follows extent pointers while extents are marked as
indirect. This can loop forever for corrupted filesystem. Limit number
the of indirect extents we are willing to follow in a row.

[JK: Updated changelog, limit, style]

Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Cc: Jan Kara <jack@suse.com>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---