KMSAN: uninit-value in rt2500usb_probe_hw

Status: closed as dup on 2021/01/21 06:27
Subsystems: wireless usb
[Documentation on labels]
Reported-by: syzbot+35c80b2190255a410f66@syzkaller.appspotmail.com
First crash: 2538d, last: 2483d
▶ ▼ Duplicate of
Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported
KMSAN: uninit-value in rt2500usb_bbp_read usb wireless 7 C 211 2104d 2606d
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
Re: KMSAN: uninit-value in rt2500usb_probe_hw 6 (6) 2020/09/30 16:20
Reminder: 67 active syzbot reports in usb subsystem 1 (1) 2019/10/04 03:38
KMSAN: uninit-value in rt2500usb_probe_hw 0 (1) 2019/09/30 22:39
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2020/09/26 01:00 20m anant.thazhemadam@gmail.com https://github.com/google/kmsan.git master OK

Sample crash report:
usb 1-1: config 0 descriptor??
usb 1-1: reset high-speed USB device number 2 using dummy_hcd
usb 1-1: device descriptor read/64, error -71
usb 1-1: Using ep0 maxpacket: 16
ieee80211 phy3: rt2x00usb_vendor_request: Error - Vendor Request 0x09 failed for offset 0x0000 with error -71
ieee80211 phy3: rt2x00_set_chip: Info - Chipset detected - rt: 2570, rf: 0000, rev: 8771
==================================================================
BUG: KMSAN: uninit-value in rt2500usb_init_eeprom drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1443 [inline]
BUG: KMSAN: uninit-value in rt2500usb_probe_hw+0xb5e/0x22a0 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1757
CPU: 0 PID: 3369 Comm: kworker/0:2 Not tainted 5.3.0-rc7+ #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+0x162/0x2d0 mm/kmsan/kmsan_report.c:109
 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:294
 rt2500usb_init_eeprom drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1443 [inline]
 rt2500usb_probe_hw+0xb5e/0x22a0 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1757
 rt2x00lib_probe_dev+0xba9/0x3260 drivers/net/wireless/ralink/rt2x00/rt2x00dev.c:1427
 rt2x00usb_probe+0x7ae/0xf60 drivers/net/wireless/ralink/rt2x00/rt2x00usb.c:842
 rt2500usb_probe+0x50/0x60 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1966
 usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361
 really_probe+0x1373/0x1dc0 drivers/base/dd.c:552
 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709
 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816
 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
 __device_attach+0x489/0x750 drivers/base/dd.c:882
 device_initial_probe+0x4a/0x60 drivers/base/dd.c:929
 bus_probe_device+0x131/0x390 drivers/base/bus.c:514
 device_add+0x25b5/0x2df0 drivers/base/core.c:2165
 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+0x1373/0x1dc0 drivers/base/dd.c:552
 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709
 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816
 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
 __device_attach+0x489/0x750 drivers/base/dd.c:882
 device_initial_probe+0x4a/0x60 drivers/base/dd.c:929
 bus_probe_device+0x131/0x390 drivers/base/bus.c:514
 device_add+0x25b5/0x2df0 drivers/base/core.c:2165
 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: ----reg.i.i@rt2500usb_probe_hw
Variable was created at:
 rt2500usb_register_read drivers/net/wireless/ralink/rt2x00/rt2500usb.c:51 [inline]
 rt2500usb_init_eeprom drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1440 [inline]
 rt2500usb_probe_hw+0x774/0x22a0 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1757
 rt2x00lib_probe_dev+0xba9/0x3260 drivers/net/wireless/ralink/rt2x00/rt2x00dev.c:1427
==================================================================

Crashes (8):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/09/18 10:10 https://github.com/google/kmsan.git master cebbfdbcf2b7 03e0d245 .config console log report syz C ci-upstream-kmsan-gce
2019/10/07 05:16 https://github.com/google/kmsan.git master 1e76a3e537c3 f3f7d9c8 .config console log report ci-upstream-kmsan-gce
2019/10/06 23:49 https://github.com/google/kmsan.git master 1e76a3e537c3 f3f7d9c8 .config console log report ci-upstream-kmsan-gce
2019/10/06 07:17 https://github.com/google/kmsan.git master 1e76a3e537c3 f3f7d9c8 .config console log report ci-upstream-kmsan-gce
2019/10/06 03:05 https://github.com/google/kmsan.git master 1e76a3e537c3 f3f7d9c8 .config console log report ci-upstream-kmsan-gce
2019/09/28 14:27 https://github.com/google/kmsan.git master 124037e07586 eb6b9855 .config console log report ci-upstream-kmsan-gce
2019/09/18 04:14 https://github.com/google/kmsan.git master cebbfdbcf2b7 03e0d245 .config console log report ci-upstream-kmsan-gce
2019/08/13 04:31 https://github.com/google/kmsan.git master 61ccdad1fcdf 8620c2c2 .config console log report ci-upstream-kmsan-gce
* Struck through repros no longer work on HEAD.