linux-kernel - [PATCH] audit: add fchmodat2() to change attributes class

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Message-ID: <20251124194930.8576-1-jeff@bencteux.fr>
Date: Mon, 24 Nov 2025 20:49:30 +0100
From: Jeffrey Bencteux <jeff@...cteux.fr>
To: audit@...r.kernel.org,
	paul@...l-moore.com,
	eparis@...hat.com
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH] audit: add fchmodat2() to change attributes class

fchmodat2(), introduced in version 6.6 is currently not in the change
attribute class of audit. Calling fchmodat2() to change a file
attribute in the same fashion than chmod() or fchmodat() will bypass
audit rules such as:

-w /tmp/test -p rwa -k test_rwa

The current patch adds fchmodat2() to the change attributes class.

Signed-off-by: Jeffrey Bencteux <jeff@...cteux.fr>
---
 include/asm-generic/audit_change_attr.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/asm-generic/audit_change_attr.h b/include/asm-generic/audit_change_attr.h
index cc840537885f..ddd90bbe40df 100644
--- a/include/asm-generic/audit_change_attr.h
+++ b/include/asm-generic/audit_change_attr.h
@@ -26,6 +26,9 @@ __NR_fremovexattr,
 __NR_fchownat,
 __NR_fchmodat,
 #endif
+#ifdef __NR_fchmodat2
+__NR_fchmodat2,
+#endif
 #ifdef __NR_chown32
 __NR_chown32,
 __NR_fchown32,

base-commit: ac3fd01e4c1efce8f2c054cdeb2ddd2fc0fb150d
-- 
2.49.0