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ocfs2: annotate flexible array members with __counted_by_le()

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Annotate flexible array members of 'struct ocfs2_extent_list',
'struct ocfs2_chain_list', 'struct ocfs2_truncate_log',
'struct ocfs2_dx_entry_list', 'ocfs2_refcount_list' and
'struct ocfs2_xattr_header' with  '__counted_by_le()'
attribute to improve array bounds checking when
CONFIG_UBSAN_BOUNDS is enabled.

[dmantipov@yandex.ru: fix __counted_by_le() usage in ocfs2_expand_inline_dx_root()]
  Link: https://lkml.kernel.org/r/20251014070324.130313-1-dmantipov@yandex.ru
Link: https://lkml.kernel.org/r/20251007123526.213150-1-dmantipov@yandex.ru
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Reviewed-by: Heming Zhao <heming.zhao@suse.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Dmitry Antipov
2025-10-07 15:35:26 +03:00
committed by Andrew Morton
parent cd4eaccc00
commit 2f26f58df0
2 changed files with 21 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
fs/ocfs2/dir.c
View File

@@ -4104,10 +4104,15 @@ static int ocfs2_expand_inline_dx_root(struct inode *dir,
}
dx_root->dr_flags &= ~OCFS2_DX_FLAG_INLINE;
memset(&dx_root->dr_list, 0, osb->sb->s_blocksize -
offsetof(struct ocfs2_dx_root_block, dr_list));
dx_root->dr_list.l_tree_depth = 0;
dx_root->dr_list.l_count =
cpu_to_le16(ocfs2_extent_recs_per_dx_root(osb->sb));
dx_root->dr_list.l_next_free_rec = 0;
memset(&dx_root->dr_list.l_recs, 0,
osb->sb->s_blocksize -
(offsetof(struct ocfs2_dx_root_block, dr_list) +
offsetof(struct ocfs2_extent_list, l_recs)));
/* This should never fail considering we start with an empty
* dx_root. */

22
fs/ocfs2/ocfs2_fs.h
View File

@@ -468,7 +468,8 @@ struct ocfs2_extent_list {
__le16 l_reserved1;
__le64 l_reserved2; /* Pad to
sizeof(ocfs2_extent_rec) */
/*10*/ struct ocfs2_extent_rec l_recs[]; /* Extent records */
/* Extent records */
/*10*/ struct ocfs2_extent_rec l_recs[] __counted_by_le(l_count);
};
/*
@@ -482,7 +483,8 @@ struct ocfs2_chain_list {
__le16 cl_count; /* Total chains in this list */
__le16 cl_next_free_rec; /* Next unused chain slot */
__le64 cl_reserved1;
/*10*/ struct ocfs2_chain_rec cl_recs[]; /* Chain records */
/* Chain records */
/*10*/ struct ocfs2_chain_rec cl_recs[] __counted_by_le(cl_count);
};
/*
@@ -494,7 +496,8 @@ struct ocfs2_truncate_log {
/*00*/ __le16 tl_count; /* Total records in this log */
__le16 tl_used; /* Number of records in use */
__le32 tl_reserved1;
/*08*/ struct ocfs2_truncate_rec tl_recs[]; /* Truncate records */
/* Truncate records */
/*08*/ struct ocfs2_truncate_rec tl_recs[] __counted_by_le(tl_count);
};
/*
@@ -796,9 +799,10 @@ struct ocfs2_dx_entry_list {
* possible in de_entries */
__le16 de_num_used; /* Current number of
* de_entries entries */
struct ocfs2_dx_entry de_entries[]; /* Indexed dir entries
* in a packed array of
* length de_num_used */
/* Indexed dir entries in a packed
* array of length de_num_used.
*/
struct ocfs2_dx_entry de_entries[] __counted_by_le(de_count);
};
#define OCFS2_DX_FLAG_INLINE 0x01
@@ -934,7 +938,8 @@ struct ocfs2_refcount_list {
__le16 rl_used; /* Current number of used records */
__le32 rl_reserved2;
__le64 rl_reserved1; /* Pad to sizeof(ocfs2_refcount_record) */
/*10*/ struct ocfs2_refcount_rec rl_recs[]; /* Refcount records */
/* Refcount records */
/*10*/ struct ocfs2_refcount_rec rl_recs[] __counted_by_le(rl_count);
};
@@ -1020,7 +1025,8 @@ struct ocfs2_xattr_header {
buckets. A block uses
xb_check and sets
this field to zero.) */
struct ocfs2_xattr_entry xh_entries[]; /* xattr entry list. */
/* xattr entry list. */
struct ocfs2_xattr_entry xh_entries[] __counted_by_le(xh_count);
};
/*