Alsa-Devel Archive on lore.kernel.org
 help / color / Atom feed
From: syzbot <syzbot+abe1ab7afc62c6bb6377@syzkaller.appspotmail.com>
To: allison@lohutok.net, alsa-devel@alsa-project.org,
	benquike@gmail.com,  dan.carpenter@oracle.com, g@b4.vu,
	glider@google.com,  linux-kernel@vger.kernel.org, perex@perex.cz,
	syzkaller-bugs@googlegroups.com,  tglx@linutronix.de,
	tiwai@suse.com, wang6495@umn.edu, yuehaibing@huawei.com
Subject: [alsa-devel] KMSAN: uninit-value in get_min_max_with_quirks
Date: Fri, 08 Nov 2019 09:04:10 -0800
Message-ID: <0000000000004acf5b0596d8c522@google.com> (raw)

Hello,

syzbot found the following crash on:

HEAD commit:    c2453450 kmsan: kcov: prettify the code unpoisoning area->..
git tree:       https://github.com/google/kmsan.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=119f1173600000
kernel config:  https://syzkaller.appspot.com/x/.config?x=3684f3c73f43899a
dashboard link: https://syzkaller.appspot.com/bug?extid=abe1ab7afc62c6bb6377
compiler:       clang version 9.0.0 (/home/glider/llvm/clang  
80fee25776c2fb61e74c1ecb1a523375c2500b69)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16255fe7600000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15e73290e00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+abe1ab7afc62c6bb6377@syzkaller.appspotmail.com

usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: Product: syz
usb 1-1: Manufacturer: syz
usb 1-1: SerialNumber: syz
usb 1-1: 0:2 : does not exist
=====================================================
BUG: KMSAN: uninit-value in get_min_max_with_quirks+0xd6f/0x2ea0  
sound/usb/mixer.c:1239
CPU: 0 PID: 2859 Comm: kworker/0:2 Not tainted 5.4.0-rc3+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS  
Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
  __dump_stack lib/dump_stack.c:77 [inline]
  dump_stack+0x191/0x1f0 lib/dump_stack.c:113
  kmsan_report+0x14a/0x2f0 mm/kmsan/kmsan_report.c:109
  __msan_warning+0x73/0xf0 mm/kmsan/kmsan_instr.c:245
  get_min_max_with_quirks+0xd6f/0x2ea0 sound/usb/mixer.c:1239
  __build_feature_ctl+0x12b9/0x29e0 sound/usb/mixer.c:1665
  build_feature_ctl sound/usb/mixer.c:1709 [inline]
  parse_audio_feature_unit sound/usb/mixer.c:1918 [inline]
  parse_audio_unit+0x218c/0x7490 sound/usb/mixer.c:2753
  snd_usb_mixer_controls sound/usb/mixer.c:3095 [inline]
  snd_usb_create_mixer+0x1d7c/0x4070 sound/usb/mixer.c:3445
  usb_audio_probe+0x286b/0x3eb0 sound/usb/card.c:653
  usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361
  really_probe+0xd91/0x1f90 drivers/base/dd.c:552
  driver_probe_device+0x1ba/0x510 drivers/base/dd.c:721
  __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:828
  bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:430
  __device_attach+0x489/0x750 drivers/base/dd.c:894
  device_initial_probe+0x4a/0x60 drivers/base/dd.c:941
  bus_probe_device+0x131/0x390 drivers/base/bus.c:490
  device_add+0x25b5/0x2df0 drivers/base/core.c:2201
  usb_set_configuration+0x309f/0x3710 drivers/usb/core/message.c:2027
  generic_probe+0xe7/0x280 drivers/usb/core/generic.c:210
  usb_probe_device+0x146/0x200 drivers/usb/core/driver.c:266
  really_probe+0xd91/0x1f90 drivers/base/dd.c:552
  driver_probe_device+0x1ba/0x510 drivers/base/dd.c:721
  __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:828
  bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:430
  __device_attach+0x489/0x750 drivers/base/dd.c:894
  device_initial_probe+0x4a/0x60 drivers/base/dd.c:941
  bus_probe_device+0x131/0x390 drivers/base/bus.c:490
  device_add+0x25b5/0x2df0 drivers/base/core.c:2201
  usb_new_device+0x23e5/0x2fb0 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+0x581d/0x72f0 drivers/usb/core/hub.c:5441
  process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2269
  worker_thread+0x111b/0x2460 kernel/workqueue.c:2415
  kthread+0x4b5/0x4f0 kernel/kthread.c:256
  ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355

Local variable description: ----saved@get_min_max_with_quirks
Variable was created at:
  get_min_max_with_quirks+0xa8b/0x2ea0 sound/usb/mixer.c:1231
  get_min_max_with_quirks+0xa8b/0x2ea0 sound/usb/mixer.c:1231
=====================================================


---
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
_______________________________________________
Alsa-devel mailing list
Alsa-devel@alsa-project.org
https://mailman.alsa-project.org/mailman/listinfo/alsa-devel

                 reply index

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=0000000000004acf5b0596d8c522@google.com \
    --to=syzbot+abe1ab7afc62c6bb6377@syzkaller.appspotmail.com \
    --cc=allison@lohutok.net \
    --cc=alsa-devel@alsa-project.org \
    --cc=benquike@gmail.com \
    --cc=dan.carpenter@oracle.com \
    --cc=g@b4.vu \
    --cc=glider@google.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=perex@perex.cz \
    --cc=syzkaller-bugs@googlegroups.com \
    --cc=tglx@linutronix.de \
    --cc=tiwai@suse.com \
    --cc=wang6495@umn.edu \
    --cc=yuehaibing@huawei.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Alsa-Devel Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/alsa-devel/0 alsa-devel/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 alsa-devel alsa-devel/ https://lore.kernel.org/alsa-devel \
		alsa-devel@alsa-project.org
	public-inbox-index alsa-devel

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.alsa-project.alsa-devel


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git