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=-4.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FSL_HELO_FAKE,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 F085EC76186 for ; Tue, 23 Jul 2019 16:14:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B48F9205F4 for ; Tue, 23 Jul 2019 16:14:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563898474; bh=WKwZmQ3mghR8Sji7G4J6WqmqQ+q6nVFcQGnt+GgZwvU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=nW/XhVyLpooFY5/3ii+6PrNezqMM888TqkfOs6VVkNcKHmZc1IPhKvc9eoxU5deBN Ni+F9vgqABt8XHWOAA4uDQJ7Hk7zqU66ZWjDwh33749eXuyMKO/2elh1CcOs/JJjE+ +FwugBmsA6k1HVfSugFe98lC8J55oAcTZ4lR+Kmw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729715AbfGWQOa (ORCPT ); Tue, 23 Jul 2019 12:14:30 -0400 Received: from mail.kernel.org ([198.145.29.99]:58252 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728815AbfGWQOa (ORCPT ); Tue, 23 Jul 2019 12:14:30 -0400 Received: from gmail.com (unknown [104.132.1.77]) (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 135EB205F4; Tue, 23 Jul 2019 16:14:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563898468; bh=WKwZmQ3mghR8Sji7G4J6WqmqQ+q6nVFcQGnt+GgZwvU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=jTYc9vF/SaD70ecg/bejJKG1fN6J1OeY5yaNfPO71FbuWa88lal0xS64E36klAP26 ISyTcDGn9Ctdgxu/Lv0JjDfXO9rB0YjFT8MN15xLOzrDfdRjKwbf2rYmJOlslskzMD 8QTsspph90ZWEKE8zOoVqcZtbzgxxv95iwBY90W0= Date: Tue, 23 Jul 2019 09:14:26 -0700 From: Eric Biggers To: syzbot Cc: andreyknvl@google.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: usb-fuzzer boot error: general protection fault in dma_direct_max_mapping_size Message-ID: <20190723161425.GA23641@gmail.com> Mail-Followup-To: syzbot , andreyknvl@google.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <000000000000c3c7b6058e5a47af@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000000000000c3c7b6058e5a47af@google.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org On Tue, Jul 23, 2019 at 07:48:05AM -0700, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: 1154c0b0 wip > git tree: https://github.com/google/kasan.git usb-fuzzer > console output: https://syzkaller.appspot.com/x/log.txt?x=1197774c600000 > kernel config: https://syzkaller.appspot.com/x/.config?x=b228fb19779df17d > dashboard link: https://syzkaller.appspot.com/bug?extid=4efacf59126f1ae87000 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > > Unfortunately, I don't have any reproducer for this crash yet. > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+4efacf59126f1ae87000@syzkaller.appspotmail.com > > RPC: Registered udp transport module. > RPC: Registered tcp transport module. > RPC: Registered tcp NFSv4.1 backchannel transport module. > pci 0000:00:00.0: Limiting direct PCI/PCI transfers > PCI: CLS 0 bytes, default 64 > PCI-DMA: Using software bounce buffering for IO (SWIOTLB) > software IO TLB: mapped [mem 0xbbffd000-0xbfffd000] (64MB) > RAPL PMU: API unit is 2^-32 Joules, 0 fixed counters, 10737418240 ms ovfl > timer > clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x212735223b2, > max_idle_ns: 440795277976 ns > clocksource: Switched to clocksource tsc > check: Scanning for low memory corruption every 60 seconds > Initialise system trusted keyrings > workingset: timestamp_bits=40 max_order=21 bucket_order=0 > NFS: Registering the id_resolver key type > Key type id_resolver registered > Key type id_legacy registered > 9p: Installing v9fs 9p2000 file system support > Key type asymmetric registered > Asymmetric key parser 'x509' registered > Block layer SCSI generic (bsg) driver version 0.4 loaded (major 247) > io scheduler mq-deadline registered > io scheduler kyber registered > usbcore: registered new interface driver udlfb > usbcore: registered new interface driver smscufx > input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0 > ACPI: Power Button [PWRF] > input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1 > ACPI: Sleep Button [SLPF] > PCI Interrupt Link [LNKC] enabled at IRQ 11 > virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver > PCI Interrupt Link [LNKD] enabled at IRQ 10 > virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver > Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled > 00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A > 00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A > 00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A > 00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A > Non-volatile memory driver v1.3 > Linux agpgart interface v0.103 > usbcore: registered new interface driver udl > loop: module loaded > usbcore: registered new interface driver rtsx_usb > usbcore: registered new interface driver viperboard > usbcore: registered new interface driver dln2 > usbcore: registered new interface driver pn533_usb > usbcore: registered new interface driver port100 > usbcore: registered new interface driver nfcmrvl > scsi host0: Virtio SCSI HBA > kasan: CONFIG_KASAN_INLINE enabled > kasan: GPF could be caused by NULL-ptr deref or user memory access > general protection fault: 0000 [#1] SMP KASAN > CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.3.0-rc1+ #16 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RIP: 0010:dma_addressing_limited /./include/linux/dma-mapping.h:692 [inline] > RIP: 0010:dma_direct_max_mapping_size+0x73/0x19a /kernel/dma/direct.c:408 > Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 1e 01 00 00 48 8b 9d 38 03 > 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 > 06 01 00 00 48 8d bd 48 03 00 00 48 8b 1b 48 b8 > RSP: 0000:ffff8881da18f628 EFLAGS: 00010246 > RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff812d716c > RDX: 0000000000000000 RSI: ffffffff812d7189 RDI: ffff8881d7428378 > RBP: ffff8881d7428040 R08: ffff8881da180000 R09: ffffed103ade30cb > R10: ffffed103ade30ca R11: ffff8881d6f18657 R12: ffff8881d7428040 > R13: ffff8881d769e8b0 R14: 0000000000000200 R15: 0000000000000000 > FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000000000000 CR3: 0000000006a21000 CR4: 00000000001406e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > dma_max_mapping_size+0xb5/0xf0 /kernel/dma/mapping.c:375 > __scsi_init_queue+0x17e/0x510 /drivers/scsi/scsi_lib.c:1787 > scsi_mq_alloc_queue+0xcb/0x170 /drivers/scsi/scsi_lib.c:1833 > scsi_alloc_sdev+0x82e/0xc50 /drivers/scsi/scsi_scan.c:269 > scsi_probe_and_add_lun+0x1ee5/0x2cd0 /drivers/scsi/scsi_scan.c:1078 > __scsi_scan_target+0x273/0xc30 /drivers/scsi/scsi_scan.c:1562 > scsi_scan_channel.part.0+0x126/0x1a0 /drivers/scsi/scsi_scan.c:1650 > scsi_scan_channel /drivers/scsi/scsi_scan.c:1677 [inline] > scsi_scan_host_selected+0x2bb/0x3f0 /drivers/scsi/scsi_scan.c:1679 > do_scsi_scan_host /drivers/scsi/scsi_scan.c:1817 [inline] > do_scsi_scan_host+0x1e8/0x260 /drivers/scsi/scsi_scan.c:1807 > scsi_scan_host /drivers/scsi/scsi_scan.c:1847 [inline] > scsi_scan_host+0x37c/0x440 /drivers/scsi/scsi_scan.c:1835 > virtscsi_probe+0x9b7/0xbb5 /drivers/scsi/virtio_scsi.c:847 > virtio_dev_probe+0x463/0x710 /drivers/virtio/virtio.c:248 > really_probe+0x281/0x650 /drivers/base/dd.c:548 > driver_probe_device+0x101/0x1b0 /drivers/base/dd.c:709 > device_driver_attach+0x108/0x140 /drivers/base/dd.c:983 > __driver_attach+0xda/0x240 /drivers/base/dd.c:1060 > bus_for_each_dev+0x14b/0x1d0 /drivers/base/bus.c:304 > bus_add_driver+0x44e/0x5a0 /drivers/base/bus.c:645 > driver_register+0x1c4/0x320 /drivers/base/driver.c:170 > __write_once_size /./include/linux/compiler.h:226 [inline] > INIT_LIST_HEAD /./include/linux/list.h:28 [inline] > init+0xa1/0x115 /drivers/char/virtio_console.c:2251 > do_one_initcall+0xf0/0x614 /init/main.c:939 > do_initcall_level /init/main.c:1007 [inline] > do_initcalls /init/main.c:1015 [inline] > do_basic_setup /init/main.c:1032 [inline] > kernel_init_freeable+0x4a9/0x596 /init/main.c:1192 > kernel_init+0xd/0x1bf /init/main.c:1110 > ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:352 > Modules linked in: > ---[ end trace 73ab592d53bc046f ]--- > RIP: 0010:dma_addressing_limited /./include/linux/dma-mapping.h:692 [inline] > RIP: 0010:dma_direct_max_mapping_size+0x73/0x19a /kernel/dma/direct.c:408 > Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 1e 01 00 00 48 8b 9d 38 03 > 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 > 06 01 00 00 48 8d bd 48 03 00 00 48 8b 1b 48 b8 > RSP: 0000:ffff8881da18f628 EFLAGS: 00010246 > RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff812d716c > RDX: 0000000000000000 RSI: ffffffff812d7189 RDI: ffff8881d7428378 > RBP: ffff8881d7428040 R08: ffff8881da180000 R09: ffffed103ade30cb > R10: ffffed103ade30ca R11: ffff8881d6f18657 R12: ffff8881d7428040 > R13: ffff8881d769e8b0 R14: 0000000000000200 R15: 0000000000000000 > FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000000000000 CR3: 0000000006a21000 CR4: 00000000001406e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > --- > This bug is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@googlegroups.com. > > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/000000000000c3c7b6058e5a47af%40google.com. Seems there is a fix for this queued in the SCSI tree. #syz fix: scsi: core: fix the dma_max_mapping_size call Other threads: https://marc.info/?l=linux-scsi&m=156378725427719&w=2 https://lkml.kernel.org/lkml/20190722163759.GA28686@codemonkey.org.uk/ https://lkml.kernel.org/lkml/CACVXFVMWM3xg6EEyoyNjkLPv=8+wQKiHj6erMS_gGX25f-Ot4g@mail.gmail.com/ - Eric