From: Jan Kara <[email protected]> ------------------- This is a commit scheduled for the next v2.6.34 longterm release. http://git.kernel.org/?p=linux/kernel/git/paulg/longterm-queue-2.6.34.git If you see a problem with using this for longterm, please comment. -------------------
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: [email protected] Signed-off-by: Jan Kara <[email protected]> Signed-off-by: Paul Gortmaker <[email protected]> --- fs/udf/udf_sb.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h index d113b72c2768..efa82c91ec18 100644 --- a/fs/udf/udf_sb.h +++ b/fs/udf/udf_sb.h @@ -78,7 +78,7 @@ struct udf_virtual_data { struct udf_bitmap { __u32 s_extLength; __u32 s_extPosition; - __u16 s_nr_groups; + int s_nr_groups; struct buffer_head **s_block_bitmap; }; -- 1.8.5.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
