From: syzbot <syzbot+02c9f70f3afae308464a@syzkaller.appspotmail.com>
To: glider@google.com, gregkh@linuxfoundation.org,
kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org,
linux-usb@vger.kernel.org, stern@rowland.harvard.edu,
syzkaller-bugs@googlegroups.com, yuehaibing@huawei.com
Subject: KMSAN: uninit-value in pegasus_probe
Date: Thu, 03 Oct 2019 12:59:08 -0700 [thread overview]
Message-ID: <000000000000b91acc05940704bc@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: 124037e0 kmsan: drop inlines, rename do_kmsan_task_create()
git tree: https://github.com/google/kmsan.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=11d1ff6d600000
kernel config: https://syzkaller.appspot.com/x/.config?x=f03c659d0830ab8d
dashboard link: https://syzkaller.appspot.com/bug?extid=02c9f70f3afae308464a
compiler: clang version 9.0.0 (/home/glider/llvm/clang
80fee25776c2fb61e74c1ecb1a523375c2500b69)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1115ed6b600000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=144964cb600000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+02c9f70f3afae308464a@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: config 0 descriptor??
(unnamed net_device) (uninitialized): read_eprom_word failed
=====================================================
BUG: KMSAN: uninit-value in usb_probe_interface+0xd19/0x1310
drivers/usb/core/driver.c:361
CPU: 1 PID: 17 Comm: kworker/1:0 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+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108
__msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250
get_interrupt_interval drivers/net/usb/pegasus.c:758 [inline]
pegasus_probe+0x10b7/0x4be0 drivers/net/usb/pegasus.c:1189
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: ----data.i@pegasus_probe
Variable was created at:
get_interrupt_interval drivers/net/usb/pegasus.c:1188 [inline]
pegasus_probe+0xef3/0x4be0 drivers/net/usb/pegasus.c:1189
usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361
=====================================================
---
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
reply other threads:[~2019-10-03 19:59 UTC|newest]
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