Re: [PATCH] ima: Fix use-after-free on a dentry's dname.name
From: Mimi Zohar <zohar@linux.ibm.com>
Date: 2024-03-29 01:02:56
Also in:
linux-integrity, lkml
From: Mimi Zohar <zohar@linux.ibm.com>
Date: 2024-03-29 01:02:56
Also in:
linux-integrity, lkml
On Fri, 2024-03-22 at 10:03 -0400, Stefan Berger wrote:
->d_name.name can change on rename and the earlier value can be freed; there are conditions sufficient to stabilize it (->d_lock on dentry, ->d_lock on its parent, ->i_rwsem exclusive on the parent's inode, rename_lock), but none of those are met at any of the sites. Take a stable snapshot of the name instead. Link: https://lore.kernel.org/all/20240202182732.GE2087318@ZenIV/ (local) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Thanks, Al, Stefan. Mimi