Re: [PATCH] hfsplus: fix ignored error return in hfsplus_delete_cat

[Deepanshu Kartikey]

On Tue, Apr 14, 2026 at 7:23 AM Deepanshu Kartikey
<kartikey406@xxxxxxxxx> wrote:
>
> hfsplus_delete_cat() calls hfsplus_delete_all_attrs() to remove all
> extended attributes associated with a catalog entry, but silently
> discards its return value.
>
> When the xattr deletion fails on a corrupt filesystem image (as
> triggered by syzbot), hfsplus_delete_cat() incorrectly returns 0
> (success) to its callers, allowing execution to continue with the
> filesystem in an inconsistent state and eventually triggering a
> general protection fault in hfsplus_cat_write_inode().
>
> Fix this by capturing the return value of hfsplus_delete_all_attrs()
> and propagating genuine errors back to the caller. -ENOENT is
> excluded since it signals normal loop termination (no more xattrs
> left to delete) and is not an error condition.
>
> Fixes: 324ef39a8a4f ("hfsplus: add support of manipulation by attributes file")
> Reported-by: syzbot+c0ba772a362e70937dfb@xxxxxxxxxxxxxxxxxxxxxxxxx
> Closes: https://syzkaller.appspot.com/bug?extid=c0ba772a362e70937dfb
> Tested-by: syzbot+c0ba772a362e70937dfb@xxxxxxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Deepanshu Kartikey <kartikey406@xxxxxxxxx>
> ---
>  fs/hfsplus/catalog.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/fs/hfsplus/catalog.c b/fs/hfsplus/catalog.c
> index 02c1eee4a4b8..adbaeabc06ab 100644
> --- a/fs/hfsplus/catalog.c
> +++ b/fs/hfsplus/catalog.c
> @@ -421,8 +421,15 @@ int hfsplus_delete_cat(u32 cnid, struct inode *dir, const struct qstr *str)
>         hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY);
>
>         if (type == HFSPLUS_FILE || type == HFSPLUS_FOLDER) {
> -               if (HFSPLUS_SB(sb)->attr_tree)
> -                       hfsplus_delete_all_attrs(dir, cnid);
> +               if (HFSPLUS_SB(sb)->attr_tree) {
> +                       int attr_err = hfsplus_delete_all_attrs(dir, cnid);
> +
> +                       if (attr_err && attr_err != -ENOENT) {
> +                               pr_err("hfsplus: failed to delete xattrs for cnid %u: %d\n",
> +                                      cnid, attr_err);
> +                               err = attr_err;
> +                       }
> +               }
>         }
>
>  out:
> --
> 2.43.0
>


I have sent pach v2.

Thanks
Deepanshu