From: syzbot <syzbot+8d179821571093c5f928@syzkaller.appspotmail.com>
To: andrew@lunn.ch, davem@davemloft.net, glider@google.com,
kuba@kernel.org, linux-kernel@vger.kernel.org,
linux-usb@vger.kernel.org, linux@rempel-privat.de,
netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] KMSAN: uninit-value in ax88772a_hw_reset
Date: Sun, 19 Dec 2021 14:52:24 -0800 [thread overview]
Message-ID: <000000000000230b0d05d387a02f@google.com> (raw)
In-Reply-To: <0000000000005fb57e05d1620da1@google.com>
syzbot has found a reproducer for the following issue on:
HEAD commit: b0a8b5053e8b kmsan: core: add dependency on DEBUG_KERNEL
git tree: https://github.com/google/kmsan.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=14ad9c43b00000
kernel config: https://syzkaller.appspot.com/x/.config?x=46a956fc7a887c60
dashboard link: https://syzkaller.appspot.com/bug?extid=8d179821571093c5f928
compiler: clang version 14.0.0 (/usr/local/google/src/llvm-git-monorepo 2b554920f11c8b763cd9ed9003f4e19b919b8e1f), GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=101553cbb00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10187949b00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8d179821571093c5f928@syzkaller.appspotmail.com
asix 1-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0016: -71
asix 1-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 1-1:0.0 (unnamed net_device) (uninitialized): Failed to enable hardware MII access
=====================================================
BUG: KMSAN: uninit-value in ax88772a_hw_reset+0xc55/0x12e0 drivers/net/usb/asix_devices.c:523 drivers/net/usb/asix_devices.c:523
ax88772a_hw_reset+0xc55/0x12e0 drivers/net/usb/asix_devices.c:523 drivers/net/usb/asix_devices.c:523
ax88772_bind+0x750/0x1770 drivers/net/usb/asix_devices.c:762 drivers/net/usb/asix_devices.c:762
usbnet_probe+0x1284/0x4140 drivers/net/usb/usbnet.c:1747 drivers/net/usb/usbnet.c:1747
usb_probe_interface+0xf19/0x1600 drivers/usb/core/driver.c:396 drivers/usb/core/driver.c:396
really_probe+0x67d/0x1510 drivers/base/dd.c:596 drivers/base/dd.c:596
__driver_probe_device+0x3e9/0x530 drivers/base/dd.c:751 drivers/base/dd.c:751
driver_probe_device drivers/base/dd.c:781 [inline]
driver_probe_device drivers/base/dd.c:781 [inline] drivers/base/dd.c:898
__device_attach_driver+0x79f/0x1120 drivers/base/dd.c:898 drivers/base/dd.c:898
bus_for_each_drv+0x2d6/0x3f0 drivers/base/bus.c:427 drivers/base/bus.c:427
__device_attach+0x593/0x8e0 drivers/base/dd.c:969 drivers/base/dd.c:969
device_initial_probe+0x4a/0x60 drivers/base/dd.c:1016 drivers/base/dd.c:1016
bus_probe_device+0x17b/0x3e0 drivers/base/bus.c:487 drivers/base/bus.c:487
device_add+0x1d3e/0x2400 drivers/base/core.c:3394 drivers/base/core.c:3394
usb_set_configuration+0x37e9/0x3ed0 drivers/usb/core/message.c:2170 drivers/usb/core/message.c:2170
usb_generic_driver_probe+0x13c/0x300 drivers/usb/core/generic.c:238 drivers/usb/core/generic.c:238
usb_probe_device+0x309/0x570 drivers/usb/core/driver.c:293 drivers/usb/core/driver.c:293
really_probe+0x67d/0x1510 drivers/base/dd.c:596 drivers/base/dd.c:596
__driver_probe_device+0x3e9/0x530 drivers/base/dd.c:751 drivers/base/dd.c:751
driver_probe_device drivers/base/dd.c:781 [inline]
driver_probe_device drivers/base/dd.c:781 [inline] drivers/base/dd.c:898
__device_attach_driver+0x79f/0x1120 drivers/base/dd.c:898 drivers/base/dd.c:898
bus_for_each_drv+0x2d6/0x3f0 drivers/base/bus.c:427 drivers/base/bus.c:427
__device_attach+0x593/0x8e0 drivers/base/dd.c:969 drivers/base/dd.c:969
device_initial_probe+0x4a/0x60 drivers/base/dd.c:1016 drivers/base/dd.c:1016
bus_probe_device+0x17b/0x3e0 drivers/base/bus.c:487 drivers/base/bus.c:487
device_add+0x1d3e/0x2400 drivers/base/core.c:3394 drivers/base/core.c:3394
usb_new_device+0x1b8e/0x2950 drivers/usb/core/hub.c:2563 drivers/usb/core/hub.c:2563
hub_port_connect drivers/usb/core/hub.c:5353 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5497 [inline]
port_event drivers/usb/core/hub.c:5643 [inline]
hub_port_connect drivers/usb/core/hub.c:5353 [inline] drivers/usb/core/hub.c:5725
hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] drivers/usb/core/hub.c:5725
port_event drivers/usb/core/hub.c:5643 [inline] drivers/usb/core/hub.c:5725
hub_event+0x5ad2/0x8910 drivers/usb/core/hub.c:5725 drivers/usb/core/hub.c:5725
process_one_work+0xdb9/0x1820 kernel/workqueue.c:2298 kernel/workqueue.c:2298
worker_thread+0x10bc/0x21f0 kernel/workqueue.c:2445 kernel/workqueue.c:2445
kthread+0x721/0x850 kernel/kthread.c:327 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Local variable smsr.i created at:
asix_mdio_read_nopm+0xb9/0xa50 drivers/net/usb/asix_common.c:574 drivers/net/usb/asix_common.c:574
ax88772a_hw_reset+0x83c/0x12e0 drivers/net/usb/asix_devices.c:511 drivers/net/usb/asix_devices.c:511
CPU: 1 PID: 115 Comm: kworker/1:2 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
=====================================================
next prev parent reply other threads:[~2021-12-19 22:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-22 15:12 [syzbot] KMSAN: uninit-value in ax88772a_hw_reset syzbot
2021-12-19 22:52 ` syzbot [this message]
2021-12-25 11:15 ` Pavel Skripkin
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