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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 457C3C433FF for ; Mon, 12 Aug 2019 12:18:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 10DA020820 for ; Mon, 12 Aug 2019 12:18:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728568AbfHLMSX (ORCPT ); Mon, 12 Aug 2019 08:18:23 -0400 Received: from mail-ot1-f70.google.com ([209.85.210.70]:34088 "EHLO mail-ot1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org 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MIME-Version: 1.0 X-Received: by 2002:a6b:ea12:: with SMTP id m18mr16480217ioc.173.1565612287707; Mon, 12 Aug 2019 05:18:07 -0700 (PDT) Date: Mon, 12 Aug 2019 05:18:07 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000043d7e6058fea8482@google.com> Subject: KASAN: slab-out-of-bounds Read in mceusb_dev_recv From: syzbot To: andreyknvl@google.com, as1033x@comcast.net, brad@nextdimension.cc, gregkh@linuxfoundation.org, hans.verkuil@cisco.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-usb@vger.kernel.org, mchehab@kernel.org, rfontana@redhat.com, sean@mess.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: e96407b4 usb-fuzzer: main usb gadget fuzzer driver git tree: https://github.com/google/kasan.git usb-fuzzer console output: https://syzkaller.appspot.com/x/log.txt?x=13e270e2600000 kernel config: https://syzkaller.appspot.com/x/.config?x=cfa2c18fb6a8068e dashboard link: https://syzkaller.appspot.com/bug?extid=c7fdb6cb36e65f2fe8c9 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15b73802600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=161b8cd2600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+c7fdb6cb36e65f2fe8c9@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-out-of-bounds in mceusb_handle_command drivers/media/rc/mceusb.c:1080 [inline] BUG: KASAN: slab-out-of-bounds in mceusb_process_ir_data drivers/media/rc/mceusb.c:1171 [inline] BUG: KASAN: slab-out-of-bounds in mceusb_dev_recv+0x1014/0x12e0 drivers/media/rc/mceusb.c:1254 Read of size 1 at addr ffff8881d5357880 by task swapper/1/0 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0-rc2+ #25 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xca/0x13e lib/dump_stack.c:113 print_address_description+0x6a/0x32c mm/kasan/report.c:351 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:482 kasan_report+0xe/0x12 mm/kasan/common.c:612 mceusb_handle_command drivers/media/rc/mceusb.c:1080 [inline] mceusb_process_ir_data drivers/media/rc/mceusb.c:1171 [inline] mceusb_dev_recv+0x1014/0x12e0 drivers/media/rc/mceusb.c:1254 __usb_hcd_giveback_urb+0x1f2/0x470 drivers/usb/core/hcd.c:1757 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1822 dummy_timer+0x120f/0x2fa2 drivers/usb/gadget/udc/dummy_hcd.c:1965 call_timer_fn+0x179/0x650 kernel/time/timer.c:1322 expire_timers kernel/time/timer.c:1366 [inline] __run_timers kernel/time/timer.c:1685 [inline] __run_timers kernel/time/timer.c:1653 [inline] run_timer_softirq+0x5cc/0x14b0 kernel/time/timer.c:1698 __do_softirq+0x221/0x912 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x178/0x1a0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:537 [inline] smp_apic_timer_interrupt+0x12f/0x500 arch/x86/kernel/apic/apic.c:1095 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:828 RIP: 0010:default_idle+0x28/0x2e0 arch/x86/kernel/process.c:581 Code: 90 90 41 56 41 55 65 44 8b 2d 54 fa 93 7a 41 54 55 53 0f 1f 44 00 00 e8 76 7f d5 fb e9 07 00 00 00 0f 00 2d 6a 9f 54 00 fb f4 <65> 44 8b 2d 30 fa 93 7a 0f 1f 44 00 00 5b 5d 41 5c 41 5d 41 5e c3 RSP: 0018:ffff8881da217dc8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff8881da1fb000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffff8881da1fb844 RBP: ffffed103b43f600 R08: ffff8881da1fb000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 cpuidle_idle_call kernel/sched/idle.c:154 [inline] do_idle+0x3c2/0x4f0 kernel/sched/idle.c:263 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:354 start_secondary+0x297/0x340 arch/x86/kernel/smpboot.c:264 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241 Allocated by task 21: save_stack+0x1b/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc mm/kasan/common.c:487 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:460 kmalloc include/linux/slab.h:557 [inline] hcd_buffer_alloc+0x1ca/0x290 drivers/usb/core/buffer.c:135 usb_alloc_coherent+0x5d/0x80 drivers/usb/core/usb.c:910 mceusb_dev_probe+0x714/0x2f20 drivers/media/rc/mceusb.c:1576 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361 really_probe+0x281/0x650 drivers/base/dd.c:548 driver_probe_device+0x101/0x1b0 drivers/base/dd.c:709 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:816 bus_for_each_drv+0x15c/0x1e0 drivers/base/bus.c:454 __device_attach+0x217/0x360 drivers/base/dd.c:882 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 device_add+0xae6/0x16f0 drivers/base/core.c:2114 usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210 usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266 really_probe+0x281/0x650 drivers/base/dd.c:548 driver_probe_device+0x101/0x1b0 drivers/base/dd.c:709 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:816 bus_for_each_drv+0x15c/0x1e0 drivers/base/bus.c:454 __device_attach+0x217/0x360 drivers/base/dd.c:882 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 device_add+0xae6/0x16f0 drivers/base/core.c:2114 usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2536 hub_port_connect drivers/usb/core/hub.c:5098 [inline] hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] port_event drivers/usb/core/hub.c:5359 [inline] hub_event+0x1b5c/0x3640 drivers/usb/core/hub.c:5441 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269 worker_thread+0x96/0xe20 kernel/workqueue.c:2415 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Freed by task 1: save_stack+0x1b/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_slab_free+0x130/0x180 mm/kasan/common.c:449 slab_free_hook mm/slub.c:1423 [inline] slab_free_freelist_hook mm/slub.c:1470 [inline] slab_free mm/slub.c:3012 [inline] kfree+0xe4/0x2f0 mm/slub.c:3953 akcipher_request_free include/crypto/akcipher.h:210 [inline] public_key_verify_signature+0x874/0xc40 crypto/asymmetric_keys/public_key.c:314 x509_check_for_self_signed+0x33c/0x560 crypto/asymmetric_keys/x509_public_key.c:132 x509_cert_parse+0x61e/0x8a0 crypto/asymmetric_keys/x509_cert_parser.c:135 x509_key_preparse+0x61/0x8e0 crypto/asymmetric_keys/x509_public_key.c:165 asymmetric_key_preparse+0xab/0x110 crypto/asymmetric_keys/asymmetric_type.c:385 key_create_or_update+0x32e/0xb30 security/keys/key.c:857 load_keys_from_buffer net/wireless/reg.c:742 [inline] load_builtin_regdb_keys net/wireless/reg.c:780 [inline] regulatory_init_db+0x29b/0x45b net/wireless/reg.c:3916 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 The buggy address belongs to the object at ffff8881d5357780 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 0 bytes to the right of 256-byte region [ffff8881d5357780, ffff8881d5357880) The buggy address belongs to the page: page:ffffea000754d5c0 refcount:1 mapcount:0 mapping:ffff8881da002780 index:0x0 flags: 0x200000000000200(slab) raw: 0200000000000200 ffffea000754cac0 0000000500000005 ffff8881da002780 raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881d5357780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881d5357800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > ffff8881d5357880: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ^ ffff8881d5357900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881d5357980: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ================================================================== --- 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. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches