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ocfs2: annotate more flexible array members with __counted_by_le()

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Annotate flexible array members of 'struct ocfs2_local_alloc' and 'struct
ocfs2_inline_data' with '__counted_by_le()' attribute to improve array
bounds checking when CONFIG_UBSAN_BOUNDS is enabled, and prefer the
convenient 'memset()' over an explicit loop to simplify
'ocfs2_clear_local_alloc()'.

Link: https://lkml.kernel.org/r/20251021105518.119953-1-dmantipov@yandex.ru
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
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: Joseph Qi <jiangqi903@gmail.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
2026-01-20 19:44:18 -08:00
committed by Andrew Morton
parent e0b0f2834c
commit 29300f929e
2 changed files with 3 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
fs/ocfs2/localalloc.c
+1 -3
View File
@@ -905,13 +905,11 @@ bail:
static void ocfs2_clear_local_alloc(struct ocfs2_dinode *alloc)
{
struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc);
int i;
alloc->id1.bitmap1.i_total = 0;
alloc->id1.bitmap1.i_used = 0;
la->la_bm_off = 0;
for(i = 0; i < le16_to_cpu(la->la_size); i++)
la->la_bitmap[i] = 0;
memset(la->la_bitmap, 0, le16_to_cpu(la->la_size));
}
#if 0
fs/ocfs2/ocfs2_fs.h
+2 -2
View File
@@ -641,7 +641,7 @@ struct ocfs2_local_alloc
__le16 la_size; /* Size of included bitmap, in bytes */
__le16 la_reserved1;
__le64 la_reserved2;
/*10*/ __u8 la_bitmap[];
/*10*/ __u8 la_bitmap[] __counted_by_le(la_size);
};
/*
@@ -654,7 +654,7 @@ struct ocfs2_inline_data
* for data, starting at id_data */
__le16 id_reserved0;
__le32 id_reserved1;
__u8 id_data[]; /* Start of user data */
__u8 id_data[] __counted_by_le(id_count); /* Start of user data */
};
/*