[PATCH v2] integrity: Fix possible multiple allocation in integrity_inode_get()

[Mimi Zohar]

On Thu, 2023-06-01 at 14:42 +0800, Tianjia Zhang wrote:
> When integrity_inode_get() is querying and inserting the cache, there
> is a conditional race in the concurrent environment.
> 
> The race condition is the result of not properly implementing
> "double-checked locking". In this case, it first checks to see if the
> iint cache record exists before taking the lock, but doesn't check
> again after taking the integrity_iint_lock.
> 
> Fixes: bf2276d10ce5 ("ima: allocating iint improvements")
> Signed-off-by: Tianjia Zhang <tianjia.zhang at linux.alibaba.com>
> Cc: Dmitry Kasatkin <dmitry.kasatkin at gmail.com>
> Cc: <stable at vger.kernel.org> # v3.10+

Thanks, Tianjia.   The patch is now queued in next-integrity.

Mimi