linux-kernel - [PATCH V2 0/2] Added debugfs node initialization and null pointer detection.

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Message-ID: <20240914102418.3879203-1-Yibin.Ding@unisoc.com>
Date: Sat, 14 Sep 2024 18:24:18 +0800
From: Yibin Ding <Yibin.Ding@...soc.com>
To: <djakov@...nel.org>, <gregkh@...uxfoundation.org>, <rafael@...nel.org>
CC: <yibin.ding01@...il.com>, <niuzhiguo84@...il.com>,
        <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <Hao_hao.Wang@...soc.com>, <Ke.Wang@...soc.com>
Subject: [PATCH V2 0/2] Added debugfs node initialization and null pointer detection.

From: Yibin Ding <Yibin.ding@...soc.com>

The two debugfs nodes (/sys/kernel/debug/interconnect/test_client/dst_node,
src_node) do not initialize the character pointers before creation. For
such uninitialized nodes, direct access will cause a crash due to accessing
a null pointer.
For example, directly execute the following command after booting:
    cat /sys/kernel/debug/interconnect/test_client/dst_node.

Therefore, for the problem nodes, it is necessary to add initialization
operations and null pointer detection when accessing.

Yibin Ding (2):
  interconnect: Add character pointer initialization
  debugfs: Fix crash problem caused by accessing uninitialized nodes

 drivers/interconnect/debugfs-client.c | 9 +++++++--
 fs/debugfs/file.c                     | 4 ++++
 2 files changed, 11 insertions(+), 2 deletions(-)

-- 
2.25.1