From patchwork Mon Mar 31 08:54:01 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Angelos Oikonomopoulos X-Patchwork-Id: 14033357 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 07260C3600C for ; Mon, 31 Mar 2025 08:56:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=arHVJn2tq0pISdDGhQ9lW+/SSkCbwPoa2E5hcd62Z0M=; b=inXhV5bvyjNEJH3rjV3f5YJPSU T3/AVlqMMZJIUcCIthswpXS4vXwAmKiKv7YxdSszu/YaY73iQgzA7eKRSoxBH9M2euImzsYAd5680 ElXg+NuTJWTiFDu33CSAgR3o17sH37E1yFCVS7JGXxLnLyu8yRgjvCfBv5yR4aCjoxpVlFXRdohtA U8PpXCoE4ibXXFCzGvZw+hJ00jfRwHJjlSlYGWdmdc2hCUFPdXRghxXpLEfbtwWcPNMxqb1bQTY1+ HUzZ1NU6BkUWc2ET1HEW+Je34hE/0R1YRs3vtmw2uPawFyDgcyHyM3eUy35bgWqJ842wUlO9+bMnJ AA12E7jg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.1 #2 (Red Hat Linux)) id 1tzAwE-0000000HQys-2qDo; Mon, 31 Mar 2025 08:56:10 +0000 Received: from fanzine.igalia.com ([178.60.130.6] helo=fanzine2.igalia.com) by bombadil.infradead.org with esmtps (Exim 4.98.1 #2 (Red Hat Linux)) id 1tzAuV-0000000HQet-2ZVl for linux-arm-kernel@lists.infradead.org; Mon, 31 Mar 2025 08:54:24 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject: Cc:To:From:Sender:Reply-To:Content-Type:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=arHVJn2tq0pISdDGhQ9lW+/SSkCbwPoa2E5hcd62Z0M=; b=kohPfrwPEec576hyCbBc+RdrFv 0i6lgCR+Zao4kVxQ3twr61kw0uHdberku14BCwF6arFdfrQFl9RLyiD4tJ+PkMdHbJMEyE28moqyK ZoOUj1arpvCLtHdUFsz6mDmyKs94U8YZjbi0ITH0EONzXYEQJ1vGvgmvL6jufPp5BPDTRjrV2qir2 BQigfuzYNqyxJESah/FP2Tb1xYAEdV3Gwg6qfVcckdTWIsOWHEMAKXitdUbkjoyrX4bb3UbbBtanP UimXLy8MCCrrGxh7A6GN1phVvaQb9gBu/khHfNQDWLZPB/BcLdsPJkNOiemnL83wucWJCgmzBI7GZ 0fz7EXIw==; Received: from i59f7adb6.versanet.de ([89.247.173.182] helo=localhost.localdomain) by fanzine2.igalia.com with esmtpsa (Cipher TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1tzAuT-0097Ke-Ku; Mon, 31 Mar 2025 10:54:21 +0200 From: Angelos Oikonomopoulos To: linux-arm-kernel@lists.infradead.org Cc: catalin.marinas@arm.com, will@kernel.org, linux-kernel@vger.kernel.org, kernel-dev@igalia.com, Angelos Oikonomopoulos Subject: [PATCH] arm64: Don't call NULL in do_compat_alignment_fixup Date: Mon, 31 Mar 2025 10:54:01 +0200 Message-ID: <20250331085415.122409-1-angelos@igalia.com> X-Mailer: git-send-email 2.49.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250331_015423_649220_EB186F48 X-CRM114-Status: UNSURE ( 8.90 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org do_alignment_t32_to_handler only fixes up alignment faults for specific instructions; it returns NULL otherwise. When that's the case, signal to the caller that it needs to proceed with the regular alignment fault handling (i.e. SIGBUS). Signed-off-by: Angelos Oikonomopoulos --- arch/arm64/kernel/compat_alignment.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/kernel/compat_alignment.c b/arch/arm64/kernel/compat_alignment.c index deff21bfa680..b68e1d328d4c 100644 --- a/arch/arm64/kernel/compat_alignment.c +++ b/arch/arm64/kernel/compat_alignment.c @@ -368,6 +368,8 @@ int do_compat_alignment_fixup(unsigned long addr, struct pt_regs *regs) return 1; } + if (!handler) + return 1; type = handler(addr, instr, regs); if (type == TYPE_ERROR || type == TYPE_FAULT)