From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,T_DKIMWL_WL_HIGH,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 28CA1C28CC1 for ; Sat, 1 Jun 2019 13:27:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E93EF273CB for ; Sat, 1 Jun 2019 13:27:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559395624; bh=Y/+Qb5iD+NbGfigAdcJh/DDFmWZpuiR+gDcuExZeFrI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Yw88jHjZJZfWhVdDzSruLQ93QC9uJrlB1ewl9B+WCVKIBD+67uI23zCsWmauO08x/ fiMU+np8D8PKMB/68yuMs7RFQY1UzXdzpL1AfMNBAKQX4C/ibB+12/ba5UsNW7UoLj E+n5bwzCWCwikNmZGoCJixp0fKxVNo9TRW+mKaro= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729899AbfFAN1D (ORCPT ); Sat, 1 Jun 2019 09:27:03 -0400 Received: from mail.kernel.org ([198.145.29.99]:57520 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729231AbfFAN07 (ORCPT ); Sat, 1 Jun 2019 09:26:59 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4FBB6273CD; Sat, 1 Jun 2019 13:26:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559395619; bh=Y/+Qb5iD+NbGfigAdcJh/DDFmWZpuiR+gDcuExZeFrI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=l9X3qUcBLTMWn25dwRxRtzJmpyhoAZAMV228WIIHWwBU80zmWsNYzN9JflzL2WCp8 qz9B7Q5xvVbrMhlMyzD24umX9ZEGlMudn8cCijIRKPp61DKsuhk6JzTteTCLc3N9NK 6NA8L1NqiPNNH+ldh9rMEZgwZd0KdeaLFfOpXBeI= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Jiufei Xue , Bartlomiej Zolnierkiewicz , Sasha Levin , dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 33/56] fbdev: fix WARNING in __alloc_pages_nodemask bug Date: Sat, 1 Jun 2019 09:25:37 -0400 Message-Id: <20190601132600.27427-33-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190601132600.27427-1-sashal@kernel.org> References: <20190601132600.27427-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jiufei Xue [ Upstream commit 8c40292be9169a9cbe19aadd1a6fc60cbd1af82f ] Syzkaller hit 'WARNING in __alloc_pages_nodemask' bug. WARNING: CPU: 1 PID: 1473 at mm/page_alloc.c:4377 __alloc_pages_nodemask+0x4da/0x2130 Kernel panic - not syncing: panic_on_warn set ... Call Trace: alloc_pages_current+0xb1/0x1e0 kmalloc_order+0x1f/0x60 kmalloc_order_trace+0x1d/0x120 fb_alloc_cmap_gfp+0x85/0x2b0 fb_set_user_cmap+0xff/0x370 do_fb_ioctl+0x949/0xa20 fb_ioctl+0xdd/0x120 do_vfs_ioctl+0x186/0x1070 ksys_ioctl+0x89/0xa0 __x64_sys_ioctl+0x74/0xb0 do_syscall_64+0xc8/0x550 entry_SYSCALL_64_after_hwframe+0x49/0xbe This is a warning about order >= MAX_ORDER and the order is from userspace ioctl. Add flag __NOWARN to silence this warning. Signed-off-by: Jiufei Xue Signed-off-by: Bartlomiej Zolnierkiewicz Signed-off-by: Sasha Levin --- drivers/video/fbdev/core/fbcmap.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/video/fbdev/core/fbcmap.c b/drivers/video/fbdev/core/fbcmap.c index 68a113594808f..2811c4afde01c 100644 --- a/drivers/video/fbdev/core/fbcmap.c +++ b/drivers/video/fbdev/core/fbcmap.c @@ -94,6 +94,8 @@ int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags) int size = len * sizeof(u16); int ret = -ENOMEM; + flags |= __GFP_NOWARN; + if (cmap->len != len) { fb_dealloc_cmap(cmap); if (!len) -- 2.20.1