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 783EF1643E for ; Wed, 20 Sep 2023 12:44:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F3DB7C433C8; Wed, 20 Sep 2023 12:44:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1695213877; bh=SEc7274w+8DViA+h0LIHPI5/dQXitpgKLsRHjMN9khI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Iil8d+U22MQYQgJ49agnO+C2MNSDtXYHc+vCLMyAPs1fbF/sSBAUGstYerNSyosoi 4kyDc5lidl59/AWSvOkNyXLMyEJ5BUg3t94Ql06DShcYikKsuUJbX53cMr0BAUOjiH 9gFgrauYT5hwziZTyRMc6Jv+GJQ8xIcsr71oGW4E= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "Paul E. McKenney" , Sasha Levin Subject: [PATCH 5.15 007/110] scftorture: Forgive memory-allocation failure if KASAN Date: Wed, 20 Sep 2023 13:31:05 +0200 Message-ID: <20230920112830.660831884@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230920112830.377666128@linuxfoundation.org> References: <20230920112830.377666128@linuxfoundation.org> User-Agent: quilt/0.67 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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Paul E. McKenney [ Upstream commit 013608cd0812bdb21fc26d39ed8fdd2fc76e8b9b ] Kernels built with CONFIG_KASAN=y quarantine newly freed memory in order to better detect use-after-free errors. However, this can exhaust memory more quickly in allocator-heavy tests, which can result in spurious scftorture failure. This commit therefore forgives memory-allocation failure in kernels built with CONFIG_KASAN=y, but continues counting the errors for use in detailed test-result analyses. Signed-off-by: Paul E. McKenney Signed-off-by: Sasha Levin --- kernel/scftorture.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/kernel/scftorture.c b/kernel/scftorture.c index 27286d99e0c28..41006eef003f6 100644 --- a/kernel/scftorture.c +++ b/kernel/scftorture.c @@ -175,7 +175,8 @@ static void scf_torture_stats_print(void) scfs.n_all_wait += scf_stats_p[i].n_all_wait; } if (atomic_read(&n_errs) || atomic_read(&n_mb_in_errs) || - atomic_read(&n_mb_out_errs) || atomic_read(&n_alloc_errs)) + atomic_read(&n_mb_out_errs) || + (!IS_ENABLED(CONFIG_KASAN) && atomic_read(&n_alloc_errs))) bangstr = "!!! "; pr_alert("%s %sscf_invoked_count %s: %lld resched: %lld single: %lld/%lld single_ofl: %lld/%lld single_rpc: %lld single_rpc_ofl: %lld many: %lld/%lld all: %lld/%lld ", SCFTORT_FLAG, bangstr, isdone ? "VER" : "ver", invoked_count, scfs.n_resched, @@ -327,7 +328,8 @@ static void scftorture_invoke_one(struct scf_statistics *scfp, struct torture_ra preempt_disable(); if (scfsp->scfs_prim == SCF_PRIM_SINGLE || scfsp->scfs_wait) { scfcp = kmalloc(sizeof(*scfcp), GFP_ATOMIC); - if (WARN_ON_ONCE(!scfcp)) { + if (!scfcp) { + WARN_ON_ONCE(!IS_ENABLED(CONFIG_KASAN)); atomic_inc(&n_alloc_errs); } else { scfcp->scfc_cpu = -1; -- 2.40.1