From: syzbot <syzbot+fa2759b292234f21d29f@syzkaller.appspotmail.com>
To: corbet@lwn.net, glider@google.com, linux-kernel@vger.kernel.org,
linux-media@vger.kernel.org, mchehab@kernel.org,
syzkaller-bugs@googlegroups.com
Subject: KMSAN: uninit-value in gp8psk_power_ctrl
Date: Sun, 18 Aug 2019 18:38:06 -0700 [thread overview]
Message-ID: <00000000000041d63f05906e6486@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: f75e4cfe kmsan: use kmsan_handle_urb() in urb.c
git tree: https://github.com/google/kmsan.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=158867eea00000
kernel config: https://syzkaller.appspot.com/x/.config?x=602468164ccdc30a
dashboard link: https://syzkaller.appspot.com/bug?extid=fa2759b292234f21d29f
compiler: clang version 9.0.0 (/home/glider/llvm/clang
06d00afa61eef8f7f501ebdb4e8612ea43ec2d78)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13688dbaa00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10595a5aa00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+fa2759b292234f21d29f@syzkaller.appspotmail.com
usb 1-1: config 0 has an invalid interface number: 130 but max is 0
usb 1-1: config 0 has no interface number 0
usb 1-1: New USB device found, idVendor=09c0, idProduct=0206,
bcdDevice=ce.c9
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 1-1: config 0 descriptor??
dvb-usb: found a 'Genpix SkyWalker-2 DVB-S receiver' in warm state.
gp8psk: usb in 128 operation failed.
==================================================================
BUG: KMSAN: uninit-value in gp8psk_power_ctrl+0x33e/0xca0
drivers/media/usb/dvb-usb/gp8psk.c:193
CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.1.0+ #1
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+0x130/0x2a0 mm/kmsan/kmsan.c:622
__msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:310
gp8psk_power_ctrl+0x33e/0xca0 drivers/media/usb/dvb-usb/gp8psk.c:193
dvb_usb_device_power_ctrl drivers/media/usb/dvb-usb/dvb-usb-init.c:226
[inline]
dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:160 [inline]
dvb_usb_device_init+0x15ad/0x2cc0
drivers/media/usb/dvb-usb/dvb-usb-init.c:277
gp8psk_usb_probe+0xa2/0x190 drivers/media/usb/dvb-usb/gp8psk.c:307
usb_probe_interface+0xd66/0x1320 drivers/usb/core/driver.c:361
really_probe+0xdae/0x1d80 drivers/base/dd.c:513
driver_probe_device+0x1b3/0x4f0 drivers/base/dd.c:671
__device_attach_driver+0x5b8/0x790 drivers/base/dd.c:778
bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
__device_attach+0x454/0x730 drivers/base/dd.c:844
device_initial_probe+0x4a/0x60 drivers/base/dd.c:891
bus_probe_device+0x137/0x390 drivers/base/bus.c:514
device_add+0x288d/0x30e0 drivers/base/core.c:2106
usb_set_configuration+0x30dc/0x3750 drivers/usb/core/message.c:2027
generic_probe+0xe7/0x280 drivers/usb/core/generic.c:210
usb_probe_device+0x14c/0x200 drivers/usb/core/driver.c:266
really_probe+0xdae/0x1d80 drivers/base/dd.c:513
driver_probe_device+0x1b3/0x4f0 drivers/base/dd.c:671
__device_attach_driver+0x5b8/0x790 drivers/base/dd.c:778
bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
__device_attach+0x454/0x730 drivers/base/dd.c:844
device_initial_probe+0x4a/0x60 drivers/base/dd.c:891
bus_probe_device+0x137/0x390 drivers/base/bus.c:514
device_add+0x288d/0x30e0 drivers/base/core.c:2106
usb_new_device+0x23e5/0x2ff0 drivers/usb/core/hub.c:2534
hub_port_connect drivers/usb/core/hub.c:5089 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5204 [inline]
port_event drivers/usb/core/hub.c:5350 [inline]
hub_event+0x48d1/0x7290 drivers/usb/core/hub.c:5432
process_one_work+0x1572/0x1f00 kernel/workqueue.c:2269
worker_thread+0x111b/0x2460 kernel/workqueue.c:2415
kthread+0x4b5/0x4f0 kernel/kthread.c:254
ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355
Local variable description: ----status@gp8psk_power_ctrl
Variable was created at:
gp8psk_power_ctrl+0x63/0xca0 drivers/media/usb/dvb-usb/gp8psk.c:188
dvb_usb_device_power_ctrl drivers/media/usb/dvb-usb/dvb-usb-init.c:226
[inline]
dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:160 [inline]
dvb_usb_device_init+0x15ad/0x2cc0
drivers/media/usb/dvb-usb/dvb-usb-init.c:277
==================================================================
---
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:[~2019-08-19 1:38 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=00000000000041d63f05906e6486@google.com \
--to=syzbot+fa2759b292234f21d29f@syzkaller.appspotmail.com \
--cc=corbet@lwn.net \
--cc=glider@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=mchehab@kernel.org \
--cc=syzkaller-bugs@googlegroups.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.