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 D386A37C0FE; Wed, 17 Sep 2025 12:59:34 +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=1758113974; cv=none; b=RR8KCcYZ9GP1yVh4o89TFNheBvD0I4PmvQb5hziOqIXSo7ZIEcJ9eNOQkj+OCXylg/30s706NTH1Cw8WXQJcibknG0634TJMQH6LHBntzJjhr2M1h2ZkkC3zjyX5kFDnwdpAApgqyFBbXgPx6FP6KJukYODPpUBWLCvWDSAcMXE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758113974; c=relaxed/simple; bh=ijIAskCPAowRZ5hv6vwtf4tF+vEpESkziKh6jUiZ+Vg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pcU4DpYtZ9IFlCNyRrXHJWw2LjZRpUoqhUzlbhE0zBXVeuxpDC65/5b+KuO5+tWyAB4nuWDYqxpm42ut3H3vTzrtAIpbamIT+33bX/BFwvofXTrcEzwpKsf5tuCZPRaeQNtYNTh00/iOHu5g+rCpv6TLqHIKcekH4l+Q6t2GlXM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=tYGVYxBY; 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="tYGVYxBY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0A927C4CEF5; Wed, 17 Sep 2025 12:59:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1758113974; bh=ijIAskCPAowRZ5hv6vwtf4tF+vEpESkziKh6jUiZ+Vg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tYGVYxBYMUaozxoWVIaP52MH6JKAAvtVh70ZFHu9e7HUrjCVj6i38RTwyvLXG0ZoY no6cEXzvcLbeO6ghgzuGh9A3Z+sDFod30D020We+Z1k4u8Of2U/MBCKEBqkF6y4MbG z3AMH8NVKLnx19B75oqa/Isayt3yjgpUnCexWkBY= 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 6.1 01/78] kunit: kasan_test: disable fortify string checker on kasan_strings() test Date: Wed, 17 Sep 2025 14:34:22 +0200 Message-ID: <20250917123329.613867740@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250917123329.576087662@linuxfoundation.org> References: <20250917123329.576087662@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-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 @@ -993,6 +993,7 @@ 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);