On Wed, Oct 18, 2017 at 03:55:20PM -0700, Allison Henderson wrote:
> Parent pointer attributes use a binary name, so strlen will not work.
> Calling functions will need to pass in the name length
>
> Signed-off-by: Allison Henderson <allison.henderson@xxxxxxxxxx>
> ---
> fs/xfs/libxfs/xfs_attr.c | 12 ++++++++----
> fs/xfs/xfs_acl.c | 12 +++++++-----
> fs/xfs/xfs_attr.h | 9 +++++----
> fs/xfs/xfs_ioctl.c | 13 ++++++++++---
> fs/xfs/xfs_iops.c | 6 ++++--
> fs/xfs/xfs_trans_attr.c | 2 +-
> fs/xfs/xfs_xattr.c | 10 +++++++---
> 7 files changed, 42 insertions(+), 22 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
> index 59f3502..b94f0cd 100644
> --- a/fs/xfs/libxfs/xfs_attr.c
> +++ b/fs/xfs/libxfs/xfs_attr.c
> @@ -79,6 +79,7 @@ xfs_attr_args_init(
> struct xfs_da_args *args,
> struct xfs_inode *dp,
> const unsigned char *name,
> + int namelen,
I think these should be size_t since they describe memory buffer sizes,
and that's what strlen() returns.
At least change it to 'unsigned int' since negative size makes no sense here...
--D
> int flags)
> {
>
> @@ -91,7 +92,7 @@ xfs_attr_args_init(
> args->dp = dp;
> args->flags = flags;
> args->name = name;
> - args->namelen = strlen((const char *)name);
> + args->namelen = namelen;
> if (args->namelen >= MAXNAMELEN)
> return -EFAULT; /* match IRIX behaviour */
>
> @@ -137,6 +138,7 @@ int
> xfs_attr_get(
> struct xfs_inode *ip,
> const unsigned char *name,
> + int namelen,
> unsigned char *value,
> int *valuelenp,
> int flags)
> @@ -150,7 +152,7 @@ xfs_attr_get(
> if (XFS_FORCED_SHUTDOWN(ip->i_mount))
> return -EIO;
>
> - error = xfs_attr_args_init(&args, ip, name, flags);
> + error = xfs_attr_args_init(&args, ip, name, namelen, flags);
> if (error)
> return error;
>
> @@ -386,6 +388,7 @@ int
> xfs_attr_set(
> struct xfs_inode *dp,
> const unsigned char *name,
> + int namelen,
> unsigned char *value,
> int valuelen,
> int flags)
> @@ -402,7 +405,7 @@ xfs_attr_set(
> if (XFS_FORCED_SHUTDOWN(dp->i_mount))
> return -EIO;
>
> - error = xfs_attr_args_init(&args, dp, name, flags);
> + error = xfs_attr_args_init(&args, dp, name, namelen, flags);
> if (error)
> return error;
>
> @@ -497,6 +500,7 @@ int
> xfs_attr_remove(
> struct xfs_inode *dp,
> const unsigned char *name,
> + int namelen,
> int flags)
> {
> struct xfs_mount *mp = dp->i_mount;
> @@ -510,7 +514,7 @@ xfs_attr_remove(
> if (XFS_FORCED_SHUTDOWN(dp->i_mount))
> return -EIO;
>
> - error = xfs_attr_args_init(&args, dp, name, flags);
> + error = xfs_attr_args_init(&args, dp, name, namelen, flags);
> if (error)
> return error;
>
> diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c
> index 7034e17..72eca24 100644
> --- a/fs/xfs/xfs_acl.c
> +++ b/fs/xfs/xfs_acl.c
> @@ -153,8 +153,8 @@ xfs_get_acl(struct inode *inode, int type)
> if (!xfs_acl)
> return ERR_PTR(-ENOMEM);
>
> - error = xfs_attr_get(ip, ea_name, (unsigned char *)xfs_acl,
> - &len, ATTR_ROOT);
> + error = xfs_attr_get(ip, ea_name, strlen((const char *)ea_name),
> + (unsigned char *)xfs_acl, &len, ATTR_ROOT);
> if (error) {
> /*
> * If the attribute doesn't exist make sure we have a negative
> @@ -204,15 +204,17 @@ __xfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
> len -= sizeof(struct xfs_acl_entry) *
> (XFS_ACL_MAX_ENTRIES(ip->i_mount) - acl->a_count);
>
> - error = xfs_attr_set(ip, ea_name, (unsigned char *)xfs_acl,
> - len, ATTR_ROOT);
> + error = xfs_attr_set(ip, ea_name, strlen((const char *)ea_name),
> + (unsigned char *)xfs_acl, len, ATTR_ROOT);
>
> kmem_free(xfs_acl);
> } else {
> /*
> * A NULL ACL argument means we want to remove the ACL.
> */
> - error = xfs_attr_remove(ip, ea_name, ATTR_ROOT);
> + error = xfs_attr_remove(ip, ea_name,
> + strlen((const char *)ea_name),
> + ATTR_ROOT);
>
> /*
> * If the attribute didn't exist to start with that's fine.
> diff --git a/fs/xfs/xfs_attr.h b/fs/xfs/xfs_attr.h
> index f4a53fd..532567e 100644
> --- a/fs/xfs/xfs_attr.h
> +++ b/fs/xfs/xfs_attr.h
> @@ -161,17 +161,18 @@ int xfs_attr_list_int_ilocked(struct xfs_attr_list_context *);
> int xfs_attr_list_int(struct xfs_attr_list_context *);
> int xfs_inode_hasattr(struct xfs_inode *ip);
> int xfs_attr_get_ilocked(struct xfs_inode *ip, struct xfs_da_args *args);
> -int xfs_attr_get(struct xfs_inode *ip, const unsigned char *name,
> +int xfs_attr_get(struct xfs_inode *ip, const unsigned char *name, int namelen,
> unsigned char *value, int *valuelenp, int flags);
> -int xfs_attr_set(struct xfs_inode *dp, const unsigned char *name,
> +int xfs_attr_set(struct xfs_inode *dp, const unsigned char *name, int namelen,
> unsigned char *value, int valuelen, int flags);
> int xfs_attr_set_args(struct xfs_da_args *args, int flags, bool roll_trans);
> -int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name, int flags);
> +int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name,
> + int namelen, int flags);
> int xfs_attr_remove_args(struct xfs_da_args *args, int flags);
> int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize,
> int flags, struct attrlist_cursor_kern *cursor);
> int xfs_attr_args_init(struct xfs_da_args *args, struct xfs_inode *dp,
> - const unsigned char *name, int flags);
> + const unsigned char *name, int namelen, int flags);
> int xfs_attr_calc_size(struct xfs_da_args *args, int *local);
> int xfs_attr_set_deferred(struct xfs_inode *dp, struct xfs_defer_ops *dfops,
> const unsigned char *name, unsigned int name_len,
> diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
> index aa75389..1c9f813 100644
> --- a/fs/xfs/xfs_ioctl.c
> +++ b/fs/xfs/xfs_ioctl.c
> @@ -448,6 +448,7 @@ xfs_attrmulti_attr_get(
> {
> unsigned char *kbuf;
> int error = -EFAULT;
> + int namelen;
>
> if (*len > XFS_XATTR_SIZE_MAX)
> return -EINVAL;
> @@ -455,7 +456,9 @@ xfs_attrmulti_attr_get(
> if (!kbuf)
> return -ENOMEM;
>
> - error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
> + namelen = strlen((const char *)name);
> + error = xfs_attr_get(XFS_I(inode), name, namelen,
> + kbuf, (int *)len, flags);
> if (error)
> goto out_kfree;
>
> @@ -477,6 +480,7 @@ xfs_attrmulti_attr_set(
> {
> unsigned char *kbuf;
> int error;
> + int namelen;
>
> if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
> return -EPERM;
> @@ -487,7 +491,8 @@ xfs_attrmulti_attr_set(
> if (IS_ERR(kbuf))
> return PTR_ERR(kbuf);
>
> - error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
> + namelen = strlen((const char *)name);
> + error = xfs_attr_set(XFS_I(inode), name, namelen, kbuf, len, flags);
> if (!error)
> xfs_forget_acl(inode, name, flags);
> kfree(kbuf);
> @@ -501,10 +506,12 @@ xfs_attrmulti_attr_remove(
> uint32_t flags)
> {
> int error;
> + int namelen;
>
> if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
> return -EPERM;
> - error = xfs_attr_remove(XFS_I(inode), name, flags);
> + namelen = strlen((const char *)name);
> + error = xfs_attr_remove(XFS_I(inode), name, namelen, flags);
> if (!error)
> xfs_forget_acl(inode, name, flags);
> return error;
> diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
> index 17081c7..5247bfc 100644
> --- a/fs/xfs/xfs_iops.c
> +++ b/fs/xfs/xfs_iops.c
> @@ -70,8 +70,10 @@ xfs_initxattrs(
> int error = 0;
>
> for (xattr = xattr_array; xattr->name != NULL; xattr++) {
> - error = xfs_attr_set(ip, xattr->name, xattr->value,
> - xattr->value_len, ATTR_SECURE);
> + error = xfs_attr_set(ip, xattr->name,
> + strlen((const char *)xattr->name),
> + xattr->value, xattr->value_len,
> + ATTR_SECURE);
> if (error < 0)
> break;
> }
> diff --git a/fs/xfs/xfs_trans_attr.c b/fs/xfs/xfs_trans_attr.c
> index 39eb18d..a45e9d0 100644
> --- a/fs/xfs/xfs_trans_attr.c
> +++ b/fs/xfs/xfs_trans_attr.c
> @@ -93,7 +93,7 @@ xfs_trans_attr(
> ASSERT(XFS_IFORK_Q((dp)));
> tp->t_flags |= XFS_TRANS_RESERVE;
>
> - error = xfs_attr_args_init(&args, dp, name, flags);
> + error = xfs_attr_args_init(&args, dp, name, name_len, flags);
> if (error)
> return error;
>
> diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c
> index 0594db4..4ef09c4 100644
> --- a/fs/xfs/xfs_xattr.c
> +++ b/fs/xfs/xfs_xattr.c
> @@ -38,6 +38,7 @@ xfs_xattr_get(const struct xattr_handler *handler, struct dentry *unused,
> int xflags = handler->flags;
> struct xfs_inode *ip = XFS_I(inode);
> int error, asize = size;
> + int namelen = strlen((const char *)name);
>
> /* Convert Linux syscall to XFS internal ATTR flags */
> if (!size) {
> @@ -45,7 +46,8 @@ xfs_xattr_get(const struct xattr_handler *handler, struct dentry *unused,
> value = NULL;
> }
>
> - error = xfs_attr_get(ip, (unsigned char *)name, value, &asize, xflags);
> + error = xfs_attr_get(ip, (unsigned char *)name, namelen, value,
> + &asize, xflags);
> if (error)
> return error;
> return asize;
> @@ -81,6 +83,7 @@ xfs_xattr_set(const struct xattr_handler *handler, struct dentry *unused,
> int xflags = handler->flags;
> struct xfs_inode *ip = XFS_I(inode);
> int error;
> + int namelen = strlen((const char *)name);
>
> /* Convert Linux syscall to XFS internal ATTR flags */
> if (flags & XATTR_CREATE)
> @@ -89,8 +92,9 @@ xfs_xattr_set(const struct xattr_handler *handler, struct dentry *unused,
> xflags |= ATTR_REPLACE;
>
> if (!value)
> - return xfs_attr_remove(ip, (unsigned char *)name, xflags);
> - error = xfs_attr_set(ip, (unsigned char *)name,
> + return xfs_attr_remove(ip, (unsigned char *)name,
> + namelen, xflags);
> + error = xfs_attr_set(ip, (unsigned char *)name, namelen,
> (void *)value, size, xflags);
> if (!error)
> xfs_forget_acl(inode, name, xflags);
> --
> 2.7.4
>
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