syzbot


KMSAN: uninit-value in get_min_max_with_quirks

Status: fixed on 2019/11/29 15:48
Subsystems: sound usb
[Documentation on labels]
Reported-by: syzbot+abe1ab7afc62c6bb6377@syzkaller.appspotmail.com
Fix commit: 167beb175679 ALSA: usb-audio: Fix missing error check at mixer resolution test
First crash: 1687d, last: 1676d
Discussions (7)
Title Replies (including bot) Last reply
[PATCH 3.16 000/136] 3.16.80-rc1 review 140 (140) 2019/12/23 14:00
[PATCH 4.4 000/159] 4.4.203-stable review 179 (179) 2019/11/28 10:35
[PATCH 4.9 000/222] 4.9.203-stable review 227 (227) 2019/11/22 23:50
[PATCH 4.19 000/422] 4.19.85-stable review 478 (478) 2019/11/22 18:25
[PATCH 5.3 00/48] 5.3.12-stable review 57 (57) 2019/11/20 06:00
[PATCH 4.14 000/239] 4.14.155-stable review 247 (247) 2019/11/19 20:35
KMSAN: uninit-value in get_min_max_with_quirks 0 (1) 2019/11/08 17:04
Last patch testing requests (1)
Created Duration User Patch Repo Result
2019/11/09 17:00 21m tiwai@suse.de patch https://github.com/google/kmsan.git master OK

Sample crash report:
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
=====================================================

Crashes (11):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/10/17 00:45 https://github.com/google/kmsan.git master c24534505750 8c88c9c1 .config console log report syz C ci-upstream-kmsan-gce
2019/10/27 21:08 https://github.com/google/kmsan.git master d86c15562d02 25bb509e .config console log report ci-upstream-kmsan-gce
2019/10/27 07:52 https://github.com/google/kmsan.git master d86c15562d02 25bb509e .config console log report ci-upstream-kmsan-gce
2019/10/27 00:23 https://github.com/google/kmsan.git master d86c15562d02 25bb509e .config console log report ci-upstream-kmsan-gce
2019/10/26 21:14 https://github.com/google/kmsan.git master d86c15562d02 25bb509e .config console log report ci-upstream-kmsan-gce
2019/10/26 21:12 https://github.com/google/kmsan.git master d86c15562d02 25bb509e .config console log report ci-upstream-kmsan-gce
2019/10/25 12:04 https://github.com/google/kmsan.git master d86c15562d02 d01bb02a .config console log report ci-upstream-kmsan-gce
2019/10/25 10:12 https://github.com/google/kmsan.git master d86c15562d02 d01bb02a .config console log report ci-upstream-kmsan-gce
2019/10/24 21:18 https://github.com/google/kmsan.git master d86c15562d02 d01bb02a .config console log report ci-upstream-kmsan-gce
2019/10/20 10:40 https://github.com/google/kmsan.git master 3c8ca70889aa 8c88c9c1 .config console log report ci-upstream-kmsan-gce
2019/10/16 23:55 https://github.com/google/kmsan.git master c24534505750 8c88c9c1 .config console log report ci-upstream-kmsan-gce
* Struck through repros no longer work on HEAD.