This reverts commit
cc798c83898ea0a77fcaa1a92afda35c3c3ded74.
Tony writes:
Somehow this causes a regression in Linux next for me where I'm
seeing lots of sysfs entries now missing under
/sys/bus/platform/devices.
For example, I now only see one .serial entry show up in sysfs.
Things work again if I revert commit
cc798c83898e ("kernfs: fix
memleak inkernel_ops_readdir()"). Any ideas why that would be?
Tejun says:
Ugh, you're right. It can get double-put cuz ctx->pos is put by
release too.
So reverting it for now.
Reported-by: Tony Lindgren <tony@atomide.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Tejun Heo <tj@kernel.org>
Fixes: cc798c83898e ("kernfs: fix memleak in kernel_ops_readdir()")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
kernfs_get(pos);
mutex_unlock(&kernfs_mutex);
- if (unlikely(!dir_emit(ctx, name, len, ino, type))) {
- kernfs_put(pos);
- goto out;
- }
+ if (!dir_emit(ctx, name, len, ino, type))
+ return 0;
mutex_lock(&kernfs_mutex);
}
mutex_unlock(&kernfs_mutex);
-out:
file->private_data = NULL;
ctx->pos = INT_MAX;
return 0;