From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 978913161B0; Wed, 17 Sep 2025 12:54:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758113642; cv=none; b=fHAZz44kKmtex4+MxJh7h2K/WFLtrneyDxLNsmISbMbJvnfSk0E+r1HbRudpvhuDPVc47wWDsOyIp2CQ/XhZJ90Q4H0bEomuPtwuQh0Ja8DA1arXaLsA0muwtqQcCSRjqZhlP7jokXgaUk8TwO3uPxy46AKy2cVxeMrfRYk39qM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758113642; c=relaxed/simple; bh=Xq1RV43DgJHJwDcMJgJPw4FV9ZNvwvGUW6hEIelSMRA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KyCGZQN9DdYrhEt8/gRVVA2DQEMwCKaCqocE064sovOucAPm091fuwY3ym2dcKFsiYa/itS9WngYCwD/Ug2pmO12SNgL3RRMA2GkoWM3Ez9e85rDegQKW845ts2zz2FGLLdfkMOD4q0N7Eak5A/tt8uQwH0WwwJshakB1irK74Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=S5xB/pKD; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="S5xB/pKD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 18EDCC4CEF0; Wed, 17 Sep 2025 12:54:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1758113642; bh=Xq1RV43DgJHJwDcMJgJPw4FV9ZNvwvGUW6hEIelSMRA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S5xB/pKDw0RrkZtMhuDnYI/YnfzfO4pwfCuLKrr44OA2GgJ7Z+OKYHZvHD59C75Z/ TFbziLTMpedpBUXtllvE7SFTiJRWi551avQR+Vn5o5LAHdwmHOwgHzfbjGgrKHHKO7 QNHaXItOQcbjTW5TZ4OT7L49Quc/FGpXETtnCQg0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yeoreum Yun , Alexander Potapenko , Andrey Konovalov , Andrey Ryabinin , Dmitriy Vyukov , Vincenzo Frascino , Andrew Morton Subject: [PATCH 6.6 001/101] kunit: kasan_test: disable fortify string checker on kasan_strings() test Date: Wed, 17 Sep 2025 14:33:44 +0200 Message-ID: <20250917123336.899670303@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250917123336.863698492@linuxfoundation.org> References: <20250917123336.863698492@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Yeoreum Yun commit 7a19afee6fb39df63ddea7ce78976d8c521178c6 upstream. Similar to commit 09c6304e38e4 ("kasan: test: fix compatibility with FORTIFY_SOURCE") the kernel is panicing in kasan_string(). This is due to the `src` and `ptr` not being hidden from the optimizer which would disable the runtime fortify string checker. Call trace: __fortify_panic+0x10/0x20 (P) kasan_strings+0x980/0x9b0 kunit_try_run_case+0x68/0x190 kunit_generic_run_threadfn_adapter+0x34/0x68 kthread+0x1c4/0x228 ret_from_fork+0x10/0x20 Code: d503233f a9bf7bfd 910003fd 9424b243 (d4210000) ---[ end trace 0000000000000000 ]--- note: kunit_try_catch[128] exited with irqs disabled note: kunit_try_catch[128] exited with preempt_count 1 # kasan_strings: try faulted: last ** replaying previous printk message ** # kasan_strings: try faulted: last line seen mm/kasan/kasan_test_c.c:1600 # kasan_strings: internal error occurred preventing test case from running: -4 Link: https://lkml.kernel.org/r/20250801120236.2962642-1-yeoreum.yun@arm.com Fixes: 73228c7ecc5e ("KASAN: port KASAN Tests to KUnit") Signed-off-by: Yeoreum Yun Cc: Alexander Potapenko Cc: Andrey Konovalov Cc: Andrey Ryabinin Cc: Dmitriy Vyukov Cc: Vincenzo Frascino Cc: Signed-off-by: Andrew Morton Signed-off-by: Yeoreum Yun Signed-off-by: Greg Kroah-Hartman --- mm/kasan/kasan_test.c | 1 + 1 file changed, 1 insertion(+) --- a/mm/kasan/kasan_test.c +++ b/mm/kasan/kasan_test.c @@ -1053,6 +1053,7 @@ static void kasan_strings(struct kunit * ptr = kmalloc(size, GFP_KERNEL | __GFP_ZERO); KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr); + OPTIMIZER_HIDE_VAR(ptr); kfree(ptr);