From 86a21c79745ca97676cbd47f8608839382cc0448 Mon Sep 17 00:00:00 2001 From: Andreas Gruenbacher Date: Tue, 3 Nov 2015 12:41:59 +1100 Subject: xfs: Validate the length of on-disk ACLs In xfs_acl_from_disk, instead of trusting that xfs_acl.acl_cnt is correct, make sure that the length of the attributes is correct as well. Also, turn the aclp parameter into a const pointer. Signed-off-by: Andreas Gruenbacher Reviewed-by: Dave Chinner Signed-off-by: Dave Chinner --- fs/xfs/libxfs/xfs_format.h | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'fs/xfs/libxfs') diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h index 9590a069e556..0e62682e7019 100644 --- a/fs/xfs/libxfs/xfs_format.h +++ b/fs/xfs/libxfs/xfs_format.h @@ -1487,9 +1487,13 @@ struct xfs_acl { sizeof(struct xfs_acl_entry) \ : 25) -#define XFS_ACL_MAX_SIZE(mp) \ +#define XFS_ACL_SIZE(cnt) \ (sizeof(struct xfs_acl) + \ - sizeof(struct xfs_acl_entry) * XFS_ACL_MAX_ENTRIES((mp))) + sizeof(struct xfs_acl_entry) * cnt) + +#define XFS_ACL_MAX_SIZE(mp) \ + XFS_ACL_SIZE(XFS_ACL_MAX_ENTRIES((mp))) + /* On-disk XFS extended attribute names */ #define SGI_ACL_FILE "SGI_ACL_FILE" -- cgit v1.2.1