[Cluster-devel] [PATCH] gfs2: Add check for mempool_alloc

[Christoph Hellwig]

On Fri, Mar 11, 2022 at 04:36:16PM +0800, Jiasheng Jiang wrote:
> As the potential failure of mempool_alloc(),
> it could return NULL pointer.
> Therefore, it should be better to check it
> in order to avoid the dereference of the NULL
> pointer.
> 
> Fixes: e8c92ed76900 ("GFS2: Clean up log write code path")
> Signed-off-by: Jiasheng Jiang <jiasheng at iscas.ac.cn>

Please explain how it could fail to start with.