syzbot


KMSAN: uninit-value in rt2500usb_bbp_read
Status: upstream: reported C repro on 2019/06/06 09:42
Reported-by: syzbot+a106a5b084a6890d2607@syzkaller.appspotmail.com
First crash: 1085d, last: 583d
duplicates (1):
Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
KMSAN: uninit-value in rt2500usb_probe_hw C 8 962d 968d 0/22 closed as dup on 2021/01/21 06:27
Patch testing requests:
Created Duration User Patch Repo Result
2020/09/25 23:27 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
=====================================================
BUG: KMSAN: uninit-value in rt2500usb_regbusy_read drivers/net/wireless/ralink/rt2x00/rt2500usb.c:105 [inline]
BUG: KMSAN: uninit-value in rt2500usb_bbp_read+0x188/0x6d0 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:161
CPU: 0 PID: 12 Comm: kworker/0:1 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+0x128/0x220 mm/kmsan/kmsan_report.c:108
 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:245
 rt2500usb_regbusy_read drivers/net/wireless/ralink/rt2x00/rt2500usb.c:105 [inline]
 rt2500usb_bbp_read+0x188/0x6d0 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:161
 rt2500usb_validate_eeprom drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1376 [inline]
 rt2500usb_probe_hw+0x3b5/0x22a0 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1753
 rt2x00lib_probe_dev+0xba9/0x3220 drivers/net/wireless/ralink/rt2x00/rt2x00dev.c:1424
 rt2x00usb_probe+0x7ae/0xf60 drivers/net/wireless/ralink/rt2x00/rt2x00usb.c:839
 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+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: ----reg.i.i@rt2500usb_bbp_read
Variable was created at:
 rt2500usb_register_read_lock drivers/net/wireless/ralink/rt2x00/rt2500usb.c:61 [inline]
 rt2500usb_regbusy_read drivers/net/wireless/ralink/rt2x00/rt2500usb.c:104 [inline]
 rt2500usb_bbp_read+0xb0/0x6d0 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:161
 rt2500usb_register_read_lock drivers/net/wireless/ralink/rt2x00/rt2500usb.c:61 [inline]
 rt2500usb_regbusy_read drivers/net/wireless/ralink/rt2x00/rt2500usb.c:104 [inline]
 rt2500usb_bbp_read+0xb0/0x6d0 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:161
=====================================================

Crashes (211):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kmsan-gce 2019/10/27 15:55 https://github.com/google/kmsan.git master d86c15562d02 25bb509e .config log report syz C
ci-upstream-kmsan-gce 2019/09/14 13:33 https://github.com/google/kmsan.git master cebbfdbcf2b7 32d59357 .config log report syz C
ci-upstream-kmsan-gce 2019/08/13 06:12 https://github.com/google/kmsan.git master 61ccdad1fcdf 8620c2c2 .config log report syz C
ci-upstream-kmsan-gce 2019/06/06 04:56 https://github.com/google/kmsan.git master f75e4cfea97f a547defc .config log report syz C
ci-upstream-kmsan-gce 2020/10/20 07:44 https://github.com/google/kmsan.git master e67f4ba870c2 ff4a3345 .config log report info
ci-upstream-kmsan-gce 2020/10/19 19:13 https://github.com/google/kmsan.git master e67f4ba870c2 ff4a3345 .config log report info
ci-upstream-kmsan-gce 2020/10/19 02:24 https://github.com/google/kmsan.git master e67f4ba870c2 fea47c01 .config log report info
ci-upstream-kmsan-gce 2020/10/16 22:18 https://github.com/google/kmsan.git master e67f4ba870c2 6e262c73 .config log report info
ci-upstream-kmsan-gce 2020/10/16 14:45 https://github.com/google/kmsan.git master e67f4ba870c2 6e262c73 .config log report info
ci-upstream-kmsan-gce 2020/10/16 11:39 https://github.com/google/kmsan.git master e67f4ba870c2 6e262c73 .config log report info
ci-upstream-kmsan-gce 2020/10/15 19:47 https://github.com/google/kmsan.git master e67f4ba870c2 63869021 .config log report info
ci-upstream-kmsan-gce 2020/10/15 19:15 https://github.com/google/kmsan.git master e67f4ba870c2 63869021 .config log report info
ci-upstream-kmsan-gce 2020/10/15 17:40 https://github.com/google/kmsan.git master e67f4ba870c2 63869021 .config log report info
ci-upstream-kmsan-gce 2020/09/10 11:15 https://github.com/google/kmsan.git master 3b3ea6028136 409809d8 .config log report
ci-upstream-kmsan-gce 2020/09/10 00:47 https://github.com/google/kmsan.git master 3b3ea6028136 409809d8 .config log report
ci-upstream-kmsan-gce 2020/09/06 20:21 https://github.com/google/kmsan.git master 3b3ea6028136 abf9ba4f .config log report
ci-upstream-kmsan-gce 2020/09/05 12:06 https://github.com/google/kmsan.git master 3b3ea6028136 abf9ba4f .config log report
ci-upstream-kmsan-gce 2020/09/05 09:13 https://github.com/google/kmsan.git master 3b3ea6028136 abf9ba4f .config log report
ci-upstream-kmsan-gce 2020/09/03 11:04 https://github.com/google/kmsan.git master 3b3ea6028136 abf9ba4f .config log report
ci-upstream-kmsan-gce 2020/08/30 13:14 https://github.com/google/kmsan.git master 3b3ea6028136 d5a3ae1f .config log report
ci-upstream-kmsan-gce 2020/08/28 12:52 https://github.com/google/kmsan.git master ce8056d1f79e 816e0689 .config log report
ci-upstream-kmsan-gce 2020/08/25 13:34 https://github.com/google/kmsan.git master ce8056d1f79e 344da168 .config log report
ci-upstream-kmsan-gce 2020/08/25 07:56 https://github.com/google/kmsan.git master ce8056d1f79e 344da168 .config log report
ci-upstream-kmsan-gce 2020/08/24 20:28 https://github.com/google/kmsan.git master ce8056d1f79e 67b599d1 .config log report
ci-upstream-kmsan-gce 2020/08/24 14:21 https://github.com/google/kmsan.git master ce8056d1f79e 67b599d1 .config log report
ci-upstream-kmsan-gce 2020/08/23 07:33 https://github.com/google/kmsan.git master ce8056d1f79e 1da71ab0 .config log report
ci-upstream-kmsan-gce 2020/08/23 05:20 https://github.com/google/kmsan.git master ce8056d1f79e 1da71ab0 .config log report
ci-upstream-kmsan-gce 2020/08/22 14:17 https://github.com/google/kmsan.git master ce8056d1f79e 6436ce4b .config log report
ci-upstream-kmsan-gce 2020/08/21 03:26 https://github.com/google/kmsan.git master ce8056d1f79e 1d75fe45 .config log report
ci-upstream-kmsan-gce 2020/08/20 01:11 https://github.com/google/kmsan.git master ce8056d1f79e 94b45706 .config log report
ci-upstream-kmsan-gce 2020/08/17 07:37 https://github.com/google/kmsan.git master ce8056d1f79e 424dd8e7 .config log report
ci-upstream-kmsan-gce 2020/08/16 10:46 https://github.com/google/kmsan.git master ce8056d1f79e 424dd8e7 .config log report
ci-upstream-kmsan-gce 2020/08/16 01:05 https://github.com/google/kmsan.git master ce8056d1f79e 424dd8e7 .config log report
ci-upstream-kmsan-gce 2020/08/15 20:39 https://github.com/google/kmsan.git master ce8056d1f79e 424dd8e7 .config log report
ci-upstream-kmsan-gce 2019/06/06 03:21 https://github.com/google/kmsan.git master f75e4cfea97f a547defc .config log report
ci-upstream-kmsan-gce-386 2020/10/19 17:59 https://github.com/google/kmsan.git master e67f4ba870c2 ff4a3345 .config log report info
ci-upstream-kmsan-gce-386 2020/09/10 21:20 https://github.com/google/kmsan.git master 3b3ea6028136 409809d8 .config log report
ci-upstream-kmsan-gce-386 2020/09/09 07:53 https://github.com/google/kmsan.git master 3b3ea6028136 abf9ba4f .config log report
ci-upstream-kmsan-gce-386 2020/09/08 07:26 https://github.com/google/kmsan.git master 3b3ea6028136 abf9ba4f .config log report
ci-upstream-kmsan-gce-386 2020/09/07 11:33 https://github.com/google/kmsan.git master 3b3ea6028136 abf9ba4f .config log report
ci-upstream-kmsan-gce-386 2020/09/05 23:50 https://github.com/google/kmsan.git master 3b3ea6028136 abf9ba4f .config log report
ci-upstream-kmsan-gce-386 2020/09/04 22:45 https://github.com/google/kmsan.git master 3b3ea6028136 abf9ba4f .config log report
ci-upstream-kmsan-gce-386 2020/09/04 02:26 https://github.com/google/kmsan.git master 3b3ea6028136 abf9ba4f .config log report
ci-upstream-kmsan-gce-386 2020/09/02 16:40 https://github.com/google/kmsan.git master 3b3ea6028136 abf9ba4f .config log report
ci-upstream-kmsan-gce-386 2020/09/01 03:54 https://github.com/google/kmsan.git master 3b3ea6028136 d5a3ae1f .config log report
ci-upstream-kmsan-gce-386 2020/08/30 19:44 https://github.com/google/kmsan.git master 3b3ea6028136 d5a3ae1f .config log report
ci-upstream-kmsan-gce-386 2020/08/23 18:18 https://github.com/google/kmsan.git master ce8056d1f79e cef5ae68 .config log report