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=-6.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,T_DKIMWL_WL_HIGH,USER_AGENT_GIT autolearn=ham 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 B35E6C28EBD for ; Sun, 9 Jun 2019 17:02:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8B18A207E0 for ; Sun, 9 Jun 2019 17:02:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560099726; bh=G4bHDqkmuUO8py0FTMn8aLtIMlprFMhnTgpYD6ZO83c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=OAByskowif35Djtk64UUopBIReD9SLGnQOmeovYMqPEF8E7aSwkpct3MCZcFoYlPm 2ki9jjnZ5k1hhnJbKJ4N0SmbOLxCn7NlU/x+f+SqlOD+mE8I/N1obUrL4zgBW5dH2g TmP59H4iBPRzvGAmePRE7pWtV2z5Bun9qWDwAfvk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388169AbfFIRCG (ORCPT ); Sun, 9 Jun 2019 13:02:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:39768 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388193AbfFIRCE (ORCPT ); Sun, 9 Jun 2019 13:02:04 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 834BC204EC; Sun, 9 Jun 2019 17:02:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560099724; bh=G4bHDqkmuUO8py0FTMn8aLtIMlprFMhnTgpYD6ZO83c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TZGoWFarFQ2RrZ00Fi7F5m6lEk6XoxqGRLNm1q8HOgPfizLymGOa1f8YQ/zhsAFzG gT+gs1hhctIF1mp+xDhOAPXfTurXw/kEYOaTxYzANQnvsVl7+ShWm++/919I3pk2/R 0oof1MMNKRkO84v9B5/kLkH9V81QaG+qf19mhMmw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hulk Robot , YueHaibing , Kalle Valo Subject: [PATCH 4.4 090/241] at76c50x-usb: Dont register led_trigger if usb_register_driver failed Date: Sun, 9 Jun 2019 18:40:32 +0200 Message-Id: <20190609164150.377556807@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190609164147.729157653@linuxfoundation.org> References: <20190609164147.729157653@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: YueHaibing commit 09ac2694b0475f96be895848687ebcbba97eeecf upstream. Syzkaller report this: [ 1213.468581] BUG: unable to handle kernel paging request at fffffbfff83bf338 [ 1213.469530] #PF error: [normal kernel read fault] [ 1213.469530] PGD 237fe4067 P4D 237fe4067 PUD 237e60067 PMD 1c868b067 PTE 0 [ 1213.473514] Oops: 0000 [#1] SMP KASAN PTI [ 1213.473514] CPU: 0 PID: 6321 Comm: syz-executor.0 Tainted: G C 5.1.0-rc3+ #8 [ 1213.473514] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 [ 1213.473514] RIP: 0010:strcmp+0x31/0xa0 [ 1213.473514] Code: 00 00 00 00 fc ff df 55 53 48 83 ec 08 eb 0a 84 db 48 89 ef 74 5a 4c 89 e6 48 89 f8 48 89 fa 48 8d 6f 01 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28 38 d0 7f 04 84 c0 75 50 48 89 f0 48 89 f2 0f b6 5d [ 1213.473514] RSP: 0018:ffff8881f2b7f950 EFLAGS: 00010246 [ 1213.473514] RAX: 1ffffffff83bf338 RBX: ffff8881ea6f7240 RCX: ffffffff825350c6 [ 1213.473514] RDX: 0000000000000000 RSI: ffffffffc1ee19c0 RDI: ffffffffc1df99c0 [ 1213.473514] RBP: ffffffffc1df99c1 R08: 0000000000000001 R09: 0000000000000004 [ 1213.473514] R10: 0000000000000000 R11: ffff8881de353f00 R12: ffff8881ee727900 [ 1213.473514] R13: dffffc0000000000 R14: 0000000000000001 R15: ffffffffc1eeaaf0 [ 1213.473514] FS: 00007fa66fa01700(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000 [ 1213.473514] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1213.473514] CR2: fffffbfff83bf338 CR3: 00000001ebb9e005 CR4: 00000000007606f0 [ 1213.473514] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1213.473514] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1213.473514] PKRU: 55555554 [ 1213.473514] Call Trace: [ 1213.473514] led_trigger_register+0x112/0x3f0 [ 1213.473514] led_trigger_register_simple+0x7a/0x110 [ 1213.473514] ? 0xffffffffc1c10000 [ 1213.473514] at76_mod_init+0x77/0x1000 [at76c50x_usb] [ 1213.473514] do_one_initcall+0xbc/0x47d [ 1213.473514] ? perf_trace_initcall_level+0x3a0/0x3a0 [ 1213.473514] ? kasan_unpoison_shadow+0x30/0x40 [ 1213.473514] ? kasan_unpoison_shadow+0x30/0x40 [ 1213.473514] do_init_module+0x1b5/0x547 [ 1213.473514] load_module+0x6405/0x8c10 [ 1213.473514] ? module_frob_arch_sections+0x20/0x20 [ 1213.473514] ? kernel_read_file+0x1e6/0x5d0 [ 1213.473514] ? find_held_lock+0x32/0x1c0 [ 1213.473514] ? cap_capable+0x1ae/0x210 [ 1213.473514] ? __do_sys_finit_module+0x162/0x190 [ 1213.473514] __do_sys_finit_module+0x162/0x190 [ 1213.473514] ? __ia32_sys_init_module+0xa0/0xa0 [ 1213.473514] ? __mutex_unlock_slowpath+0xdc/0x690 [ 1213.473514] ? wait_for_completion+0x370/0x370 [ 1213.473514] ? vfs_write+0x204/0x4a0 [ 1213.473514] ? do_syscall_64+0x18/0x450 [ 1213.473514] do_syscall_64+0x9f/0x450 [ 1213.473514] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1213.473514] RIP: 0033:0x462e99 [ 1213.473514] Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 [ 1213.473514] RSP: 002b:00007fa66fa00c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 [ 1213.473514] RAX: ffffffffffffffda RBX: 000000000073bf00 RCX: 0000000000462e99 [ 1213.473514] RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000003 [ 1213.473514] RBP: 00007fa66fa00c70 R08: 0000000000000000 R09: 0000000000000000 [ 1213.473514] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa66fa016bc [ 1213.473514] R13: 00000000004bcefa R14: 00000000006f6fb0 R15: 0000000000000004 If usb_register failed, no need to call led_trigger_register_simple. Reported-by: Hulk Robot Fixes: 1264b951463a ("at76c50x-usb: add driver") Signed-off-by: YueHaibing Signed-off-by: Kalle Valo Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/at76c50x-usb.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/net/wireless/at76c50x-usb.c +++ b/drivers/net/wireless/at76c50x-usb.c @@ -2582,8 +2582,8 @@ static int __init at76_mod_init(void) if (result < 0) printk(KERN_ERR DRIVER_NAME ": usb_register failed (status %d)\n", result); - - led_trigger_register_simple("at76_usb-tx", &ledtrig_tx); + else + led_trigger_register_simple("at76_usb-tx", &ledtrig_tx); return result; }