From: Jan Kara Date: Tue, 5 Feb 2013 12:59:56 +0000 (+0100) Subject: udf: Fix bitmap overflow on large filesystems with small block size X-Git-Tag: v3.2.43~26 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1b117cc2a4cd1adbbeb6a30ac73e50c68bc807e6;p=pandora-kernel.git udf: Fix bitmap overflow on large filesystems with small block size commit 89b1f39eb4189de745fae554b0d614d87c8d5c63 upstream. For large UDF filesystems with 512-byte blocks the number of necessary bitmap blocks is larger than 2^16 so s_nr_groups in udf_bitmap overflows (the number will overflow for filesystems larger than 128 GB with 512-byte blocks). That results in ENOSPC errors despite the filesystem has plenty of free space. Fix the problem by changing s_nr_groups' type to 'int'. That is enough even for filesystems 2^32 blocks (UDF maximum) and 512-byte blocksize. Reported-and-tested-by: v10lator@myway.de Signed-off-by: Jan Kara Signed-off-by: Ben Hutchings --- Reading git-diff-tree failed