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From: David Maximiliano Hermitte <davemadmaxxx@gmail.com>
To: paul@paul-moore.com
Cc: jmorris@namei.org, serge@hallyn.com, viro@zeniv.linux.org.uk,
	brauner@kernel.org, jack@suse.cz,
	linux-security-module@vger.kernel.org,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	David Maximiliano Hermitte <davemadmaxxx@gmail.com>
Subject: security_inode_follow_link: KASAN UAF localization report
Date: Mon,  8 Jun 2026 05:31:25 +0000	[thread overview]
Message-ID: <20260608053125.1088564-1-davemadmaxxx@gmail.com> (raw)

Hello,

I reproduced this issue locally in a QEMU/TCG VM and I can confirm a valid BEFORE signal.

Summary of the local evidence:

- Reproducer started: yes
- KASAN seen: yes
- use-after-free seen: yes
- target function seen: security_inode_follow_link
- target file seen: security/security.c
- Call Trace seen: yes
- RIP seen: yes
- BEFORE validation: true

At this point I am treating this as a localization report, not as a final patch submission.

The trace points to the security_inode_follow_link / link-follow path. I would prefer not to guess the final fix, since I do not yet have a validated AFTER patch for this issue.

I can provide the reproducer evidence and retest any proposed patch if helpful.

Thanks,
David

                 reply	other threads:[~2026-06-08  5:31 UTC|newest]

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