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[PATCH 2/6] e2fsprogs: fix endian handling of ext3_extent_header
This turned up when trying to resize a filesystem containing
a file with many extents on PPC64.
Fix all locations where ext3_extent_header members aren't
handled in an endian-safe manner.
(Note: inline data portion removed for rhel7 application)
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
---
lib/ext2fs/ext3_extents.h | 15 ++++++++++-----
2 files changed, 11 insertions(+), 6 deletions(-)
diff --git a/lib/ext2fs/ext3_extents.h b/lib/ext2fs/ext3_extents.h
index 4163436..a18d705 100644
--- a/lib/ext2fs/ext3_extents.h
+++ b/lib/ext2fs/ext3_extents.h
@@ -106,15 +106,20 @@ struct ext3_ext_path {
((struct ext3_extent_idx *) (((char *) (__hdr__)) + \
sizeof(struct ext3_extent_header)))
#define EXT_HAS_FREE_INDEX(__path__) \
- ((__path__)->p_hdr->eh_entries < (__path__)->p_hdr->eh_max)
+ (ext2fs_le16_to_cpu((__path__)->p_hdr->eh_entries) < \
+ ext2fs_le16_to_cpu((__path__)->p_hdr->eh_max))
#define EXT_LAST_EXTENT(__hdr__) \
- (EXT_FIRST_EXTENT((__hdr__)) + (__hdr__)->eh_entries - 1)
+ (EXT_FIRST_EXTENT((__hdr__)) + \
+ ext2fs_le16_to_cpu((__hdr__)->eh_entries) - 1)
#define EXT_LAST_INDEX(__hdr__) \
- (EXT_FIRST_INDEX((__hdr__)) + (__hdr__)->eh_entries - 1)
+ (EXT_FIRST_INDEX((__hdr__)) + \
+ ext2fs_le16_to_cpu((__hdr__)->eh_entries) - 1)
#define EXT_MAX_EXTENT(__hdr__) \
- (EXT_FIRST_EXTENT((__hdr__)) + (__hdr__)->eh_max - 1)
+ (EXT_FIRST_EXTENT((__hdr__)) + \
+ ext2fs_le16_to_cpu((__hdr__)->eh_max) - 1)
#define EXT_MAX_INDEX(__hdr__) \
- (EXT_FIRST_INDEX((__hdr__)) + (__hdr__)->eh_max - 1)
+ (EXT_FIRST_INDEX((__hdr__)) + \
+ ext2fs_le16_to_cpu((__hdr__)->eh_max) - 1)
#endif /* _LINUX_EXT3_EXTENTS */