All of lore.kernel.org
 help / color / mirror / Atom feed
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Pavel Skripkin <paskripkin@gmail.com>, mchehab@kernel.org
Cc: Uladzislau Rezki <urezki@gmail.com>,
	linux-usb@vger.kernel.org, linux-media@vger.kernel.org,
	linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] WARNING in __vmalloc_node_range
Date: Tue, 11 May 2021 10:07:53 +0300	[thread overview]
Message-ID: <20210511070753.GU1922@kadam> (raw)
In-Reply-To: <20210508124630.GN1922@kadam>

On Sat, May 08, 2021 at 03:46:30PM +0300, Dan Carpenter wrote:
> I wrote a Smatch check to see if there were more of these and here are
> the other issues that it found.  (I will expant this check to more types
> on Monday).
> 
> drivers/media/usb/dvb-usb-v2/lmedm04.c:1196 (null)() warn: element count is wrong 'lme2510_props.num_adapters=0' vs 'lme2510_props.adapter=2'

This one is fine, but could do with some cleaning up.

> drivers/media/usb/dvb-usb-v2/af9035.c:1997 (null)() warn: element count is wrong 'af9035_props.num_adapters=0' vs 'af9035_props.adapter=2'
> drivers/media/usb/dvb-usb-v2/af9035.c:2043 (null)() warn: element count is wrong 'it930x_props.num_adapters=0' vs 'it930x_props.adapter=2'
> drivers/media/usb/dvb-usb-v2/af9015.c:1409 (null)() warn: element count is wrong 'af9015_props.num_adapters=0' vs 'af9015_props.adapter=2'

These are false positives because they use the .get_adapter_count()
function instead of setting num_adapters.

> drivers/media/usb/dvb-usb/dtt200u.c:384 (null)() warn: element count is wrong 'wt220u_miglia_properties.num_adapters=1' vs 'wt220u_miglia_properties.adapter=0'

I'm not sure what's going on with this one...  It still looks buggy to
me.

I did re-run Smatch with more elem/count pairs checked and there were
no bugs found.  A bunch of drivers think you need to add a zeroed
element at the end of the .devices[] array so someone could delete that
if they wanted.

drivers/media/usb/dvb-usb/vp702x.c:374 (null)() warn: element count is wrong 'vp702x_properties.num_device_descs=1' vs 'vp702x_properties.devices=2'
drivers/media/usb/dvb-usb/vp7045.c:184 (null)() warn: element count is wrong 'vp7045_properties.num_device_descs=2' vs 'vp7045_properties.devices=3'
drivers/media/usb/dvb-usb/cinergyT2-core.c:206 (null)() warn: element count is wrong 'cinergyt2_properties.num_device_descs=1' vs 'cinergyt2_properties.devices=2'
drivers/media/usb/dvb-usb/digitv.c:300 (null)() warn: element count is wrong 'digitv_properties.num_device_descs=1' vs 'digitv_properties.devices=2'
drivers/media/usb/dvb-usb/dibusb-mc.c:48 (null)() warn: element count is wrong 'dibusb_mc_properties.num_device_descs=8' vs 'dibusb_mc_properties.devices=9'
drivers/media/usb/dvb-usb/pctv452e.c:963 (null)() warn: element count is wrong 'pctv452e_properties.num_device_descs=1' vs 'pctv452e_properties.devices=2'
drivers/media/usb/dvb-usb/pctv452e.c:1015 (null)() warn: element count is wrong 'tt_connect_s2_3600_properties.num_device_descs=2' vs 'tt_connect_s2_3600_properties.devices=3'
drivers/media/usb/dvb-usb/gp8psk.c:324 (null)() warn: element count is wrong 'gp8psk_properties.num_device_descs=4' vs 'gp8psk_properties.devices=5'
drivers/media/usb/dvb-usb/nova-t-usb2.c:168 (null)() warn: element count is wrong 'nova_t_properties.num_device_descs=1' vs 'nova_t_properties.devices=2'
drivers/media/usb/dvb-usb/dibusb-mb.c:267 (null)() warn: element count is wrong 'dibusb1_1_an2235_properties.num_device_descs=2' vs 'dibusb1_1_an2235_properties.devices=3'
drivers/media/usb/dvb-usb/dibusb-mb.c:335 (null)() warn: element count is wrong 'dibusb2_0b_properties.num_device_descs=2' vs 'dibusb2_0b_properties.devices=3'
drivers/media/usb/dvb-usb/dibusb-mb.c:398 (null)() warn: element count is wrong 'artec_t1_usb2_properties.num_device_descs=1' vs 'artec_t1_usb2_properties.devices=2'
drivers/media/usb/dvb-usb/af9005.c:1015 (null)() warn: element count is wrong 'af9005_properties.num_device_descs=3' vs 'af9005_properties.devices=4'
drivers/media/usb/dvb-usb/dtt200u.c:176 (null)() warn: element count is wrong 'dtt200u_properties.num_device_descs=1' vs 'dtt200u_properties.devices=2'
drivers/media/usb/dvb-usb/dtt200u.c:228 (null)() warn: element count is wrong 'wt220u_properties.num_device_descs=1' vs 'wt220u_properties.devices=2'
drivers/media/usb/dvb-usb/dtt200u.c:280 (null)() warn: element count is wrong 'wt220u_fc_properties.num_device_descs=1' vs 'wt220u_fc_properties.devices=2'
drivers/media/usb/dvb-usb/dtt200u.c:332 (null)() warn: element count is wrong 'wt220u_zl0353_properties.num_device_descs=1' vs 'wt220u_zl0353_properties.devices=2'
drivers/media/usb/dvb-usb/dtt200u.c:384 (null)() warn: element count is wrong 'wt220u_miglia_properties.num_device_descs=1' vs 'wt220u_miglia_properties.devices=2'
drivers/media/usb/dvb-usb/az6027.c:1096 (null)() warn: element count is wrong 'az6027_properties.num_device_descs=8' vs 'az6027_properties.devices=9'

regards,
dan carpenter

      reply	other threads:[~2021-05-11  7:08 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-06 10:33 [syzbot] WARNING in __vmalloc_node_range syzbot
2021-05-06 14:22 ` Uladzislau Rezki
2021-05-06 14:57   ` Dan Carpenter
2021-05-06 15:00     ` Dmitry Vyukov
2021-05-06 15:06       ` Dan Carpenter
2021-05-06 15:00     ` Pavel Skripkin
2021-05-07  8:04       ` Dan Carpenter
2021-05-07 12:29         ` Pavel Skripkin
2021-05-07 12:42           ` Uladzislau Rezki
2021-05-07 12:45             ` Pavel Skripkin
2021-05-08 12:46       ` Dan Carpenter
2021-05-11  7:07         ` Dan Carpenter [this message]

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=20210511070753.GU1922@kadam \
    --to=dan.carpenter@oracle.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-media@vger.kernel.org \
    --cc=linux-usb@vger.kernel.org \
    --cc=mchehab@kernel.org \
    --cc=paskripkin@gmail.com \
    --cc=syzkaller-bugs@googlegroups.com \
    --cc=urezki@gmail.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.