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From: "Fabio M. De Francesco" <fmdefrancesco@gmail.com>
To: Larry.Finger@lwfinger.net, phil@philpotter.co.uk,
	gregkh@linuxfoundation.org, straube.linux@gmail.com,
	Pavel Skripkin <paskripkin@gmail.com>
Cc: linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org,
	Pavel Skripkin <paskripkin@gmail.com>
Subject: Re: [PATCH v3 0/6] staging: r8188eu: avoid uninit value bugs
Date: Wed, 25 Aug 2021 12:13:38 +0200	[thread overview]
Message-ID: <1640255.mRBsJQyRh4@localhost.localdomain> (raw)
In-Reply-To: <cover.1629789580.git.paskripkin@gmail.com>

On Tuesday, August 24, 2021 9:25:45 AM CEST Pavel Skripkin wrote:
> Hi, Greg, Larry and Phillip!
> 
> I noticed, that new staging driver was added like 3 weeks ago and I decided
> to look at the code, because drivers in staging directory are always buggy.
> 
> The first thing I noticed is *no one* was checking read operations result, but
> it can fail and driver may start writing random stack values into registers. It
> can cause driver misbehavior or device misbehavior.
> 
> To avoid this type of bugs, I've changed rtw_read* API. Now all rtw_read
> funtions return an error, when something went wrong with usb transfer.
> 
> It helps callers to break/return earlier and don't write random values to
> registers or to rely on random values.
> 
> 
> v2 -> v3:
>   1. Fixed OOPS in usb_read32(), caused by writing to u32 **
>   2. Fixed style in rtw_read32, rtw_read16 and rtw_read8 (Suggested by Dan)
>   3. Added error hanling when usb_control_msg() returns ret != len
>      NOTE: Dan suggested to add this to usbctrl_vendorreq(), but there is
>      pending series, which will get rid of usb_control_msg(), so (res != len)
>      check can be removed, when Fabio's series will go in
>   4. Removed RFC tag
> 
> v1 -> v2:
>   1. Make rtw_read*() return an error instead of initializing pointer to error
>   2. Split one huge patch to smaller ones for each rtw_read{8,16,32} function
>      changes
>   3. Add new macro for printing register values (It helps to not copy-paste error
>      handling)
>   4. Removed {read,write}_macreg (Suggested by Phillip)
>   5. Rebased on top of staging-next
>   6. Cleaned checkpatch errors and warnings
> 
> 
> Phillip has tested fixed v2 version, AFAIU

I had already acked your series when it was an RFC but I guess
the tag gets lost now that you have submitted the "real" patches.

As said, I like the purpose and the overall design. Furthermore,
I have compiled and linked the whole series (make C=2 -j8 
drivers/staging/r8188eu W=1) and I can confirm it does not
introduce any errors and/or warnings.

Anyway I couldn't test the module, so (for all six patches)...

Acked-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>

Thanks,

Fabio

> Pavel Skripkin (6):
>   staging: r8188eu: remove {read,write}_macreg
>   staging: r8188eu: add helper macro for printing registers
>   staging: r8188eu: add error handling of rtw_read8
>   staging: r8188eu: add error handling of rtw_read16
>   staging: r8188eu: add error handling of rtw_read32
>   staging: r8188eu: make ReadEFuse return an int
> 
>  drivers/staging/r8188eu/core/rtw_debug.c      |  79 +++-
>  drivers/staging/r8188eu/core/rtw_efuse.c      | 125 +++--
>  drivers/staging/r8188eu/core/rtw_io.c         |  27 +-
>  drivers/staging/r8188eu/core/rtw_mp.c         |  70 ++-
>  drivers/staging/r8188eu/core/rtw_mp_ioctl.c   |  13 +-
>  drivers/staging/r8188eu/core/rtw_pwrctrl.c    |   5 +-
>  drivers/staging/r8188eu/core/rtw_sreset.c     |   9 +-
>  .../r8188eu/hal/Hal8188ERateAdaptive.c        |   8 +-
>  drivers/staging/r8188eu/hal/HalPhyRf_8188e.c  |  21 +-
>  drivers/staging/r8188eu/hal/HalPwrSeqCmd.c    |   9 +-
>  drivers/staging/r8188eu/hal/hal_com.c         |  23 +-
>  drivers/staging/r8188eu/hal/hal_intf.c        |   6 +-
>  drivers/staging/r8188eu/hal/odm_interface.c   |  12 +-
>  drivers/staging/r8188eu/hal/rtl8188e_cmd.c    |  33 +-
>  drivers/staging/r8188eu/hal/rtl8188e_dm.c     |   6 +-
>  .../staging/r8188eu/hal/rtl8188e_hal_init.c   | 285 +++++++++---
>  drivers/staging/r8188eu/hal/rtl8188e_phycfg.c |  27 +-
>  drivers/staging/r8188eu/hal/rtl8188e_sreset.c |  22 +-
>  drivers/staging/r8188eu/hal/rtl8188eu_led.c   |  18 +-
>  drivers/staging/r8188eu/hal/usb_halinit.c     | 439 +++++++++++++++---
>  drivers/staging/r8188eu/hal/usb_ops_linux.c   |  62 ++-
>  drivers/staging/r8188eu/include/hal_intf.h    |   6 +-
>  .../staging/r8188eu/include/odm_interface.h   |   6 +-
>  .../staging/r8188eu/include/rtl8188e_hal.h    |   2 +-
>  drivers/staging/r8188eu/include/rtw_debug.h   |  13 +
>  drivers/staging/r8188eu/include/rtw_efuse.h   |   4 +-
>  drivers/staging/r8188eu/include/rtw_io.h      |  18 +-
>  drivers/staging/r8188eu/include/rtw_mp.h      |   2 -
>  drivers/staging/r8188eu/os_dep/ioctl_linux.c  | 179 +++++--
>  drivers/staging/r8188eu/os_dep/usb_intf.c     |   3 +-
>  30 files changed, 1143 insertions(+), 389 deletions(-)
> 
> -- 
> 2.32.0
> 
> 





  parent reply	other threads:[~2021-08-25 10:13 UTC|newest]

Thread overview: 118+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-20 17:07 [PATCH RFC 0/3] " Pavel Skripkin
2021-08-20 17:07 ` [PATCH RFC 1/3] staging: r8188eu: add proper rtw_read* error handling Pavel Skripkin
2021-08-20 21:50   ` Pavel Skripkin
2021-08-20 23:41   ` Phillip Potter
2021-08-21  5:55   ` Fabio M. De Francesco
2021-08-21 10:35     ` Pavel Skripkin
2021-08-21 12:11       ` Fabio M. De Francesco
2021-08-20 17:07 ` [PATCH RFC 2/3] staging: r8188eu: add error handling to ReadFuse Pavel Skripkin
2021-08-20 23:51   ` Phillip Potter
2021-08-21  3:59     ` Fabio M. De Francesco
2021-08-20 17:07 ` [PATCH RFC 3/3] staging: r8188eu: add error argument to read_macreg Pavel Skripkin
2021-08-20 23:18   ` Phillip Potter
2021-08-21 10:38     ` Pavel Skripkin
2021-08-20 23:12 ` [PATCH RFC 0/3] staging: r8188eu: avoid uninit value bugs Phillip Potter
2021-08-21 10:42   ` Pavel Skripkin
2021-08-22  9:53 ` Fabio M. De Francesco
2021-08-22 10:09   ` Pavel Skripkin
2021-08-22 10:59     ` Fabio M. De Francesco
2021-08-22 11:34       ` Fabio M. De Francesco
2021-08-22 12:10       ` Pavel Skripkin
2021-08-22 12:39         ` Greg KH
2021-08-22 12:50           ` Pavel Skripkin
2021-08-22 13:06             ` Greg KH
2021-08-22 13:21           ` Fabio M. De Francesco
2021-08-22 13:30             ` Greg KH
2021-08-22 13:31             ` Pavel Skripkin
2021-08-22 14:35               ` [PATCH RFC v2 0/6] " Pavel Skripkin
2021-08-22 14:35                 ` [PATCH RFC v2 1/6] staging: r8188eu: remove {read,write}_macreg Pavel Skripkin
2021-08-22 14:35                 ` [PATCH RFC v2 2/6] staging: r8188eu: add helper macro for printing registers Pavel Skripkin
2021-08-22 14:35                 ` [PATCH RFC v2 3/6] staging: r8188eu: add error handling of rtw_read8 Pavel Skripkin
2021-08-22 14:35                 ` [PATCH RFC v2 4/6] staging: r8188eu: add error handling of rtw_read16 Pavel Skripkin
2021-08-22 14:36                 ` [PATCH RFC v2 5/6] staging: r8188eu: add error handling of rtw_read32 Pavel Skripkin
2021-08-23 23:33                   ` Phillip Potter
2021-08-24  0:10                     ` Fabio M. De Francesco
2021-08-24  6:40                       ` Pavel Skripkin
2021-08-24  8:38                         ` Fabio M. De Francesco
2021-08-24  8:47                           ` Pavel Skripkin
2021-08-24  8:53                             ` Pavel Skripkin
2021-08-24  9:46                               ` Fabio M. De Francesco
2021-08-24 22:10                               ` Phillip Potter
2021-08-24 22:07                             ` Phillip Potter
2021-08-24  6:53                     ` Pavel Skripkin
2021-08-24  7:25                     ` [PATCH v3 0/6] staging: r8188eu: avoid uninit value bugs Pavel Skripkin
2021-08-24  7:27                       ` [PATCH v3 1/6] staging: r8188eu: remove {read,write}_macreg Pavel Skripkin
2021-08-26 10:39                         ` Greg KH
2021-08-26 10:40                         ` Greg KH
2021-08-24  7:27                       ` [PATCH v3 2/6] staging: r8188eu: add helper macro for printing registers Pavel Skripkin
2021-08-26 10:37                         ` Greg KH
2021-08-24  7:27                       ` [PATCH v3 3/6] staging: r8188eu: add error handling of rtw_read8 Pavel Skripkin
2021-08-25 12:05                         ` kernel test robot
2021-08-25 12:17                           ` Pavel Skripkin
2021-08-25 12:51                             ` Dan Carpenter
2021-08-25 13:02                               ` Pavel Skripkin
2021-08-25 13:34                                 ` Dan Carpenter
2021-08-25 13:44                                   ` Pavel Skripkin
2021-08-25 17:11                                     ` Nick Desaulniers
2021-08-26 11:08                                       ` Dan Carpenter
2021-08-25 23:45                         ` Fabio M. De Francesco
2021-08-26  5:13                           ` Pavel Skripkin
2021-08-26  8:21                         ` David Laight
2021-08-26  8:27                           ` Pavel Skripkin
2021-08-26 10:19                             ` David Laight
2021-08-26 11:21                               ` Dan Carpenter
2021-08-27  8:14                                 ` David Laight
2021-08-27  8:22                                   ` Pavel Skripkin
2021-08-27  9:07                         ` Dan Carpenter
2021-08-27  9:16                           ` Pavel Skripkin
2021-08-27  9:23                             ` Dan Carpenter
2021-08-30 11:21                         ` kernel test robot
2021-08-24  7:27                       ` [PATCH v3 4/6] staging: r8188eu: add error handling of rtw_read16 Pavel Skripkin
2021-08-25  4:35                         ` Fabio M. De Francesco
2021-08-25  8:22                           ` Pavel Skripkin
2021-08-25  9:48                             ` Fabio M. De Francesco
2021-08-25  9:55                               ` Pavel Skripkin
2021-08-25 10:06                                 ` Dan Carpenter
2021-08-25 10:13                                   ` Pavel Skripkin
2021-08-25 10:38                                     ` Dan Carpenter
2021-08-25 10:41                                       ` Pavel Skripkin
2021-08-25 11:06                                       ` Fabio M. De Francesco
2021-08-25 11:11                                         ` Fabio M. De Francesco
2021-08-25 11:31                                         ` Dan Carpenter
2021-08-25 12:11                                           ` Fabio M. De Francesco
2021-08-25 10:51                                 ` Fabio M. De Francesco
2021-08-26 10:50                         ` Greg KH
2021-08-26 10:58                           ` Pavel Skripkin
2021-08-24  7:27                       ` [PATCH v3 5/6] staging: r8188eu: add error handling of rtw_read32 Pavel Skripkin
2021-08-25  4:40                         ` Fabio M. De Francesco
2021-08-26  8:51                         ` David Laight
2021-08-26  9:22                           ` Pavel Skripkin
2021-08-26  9:27                             ` Pavel Skripkin
2021-08-26 10:22                               ` David Laight
2021-08-26 10:55                                 ` Pavel Skripkin
2021-08-26 10:59                                   ` David Laight
2021-08-26 20:03                                     ` Pavel Skripkin
2021-08-27  7:12                                       ` gregkh
2021-08-27  7:16                                         ` Pavel Skripkin
2021-08-24  7:27                       ` [PATCH v3 6/6] staging: r8188eu: make ReadEFuse return an int Pavel Skripkin
2021-08-25 10:13                       ` Fabio M. De Francesco [this message]
2021-08-27  7:49                       ` [PATCH v3 0/6] staging: r8188eu: avoid uninit value bugs Kari Argillander
2021-08-27  7:52                         ` Pavel Skripkin
2021-08-24  6:58                   ` [PATCH RFC v2 5/6] staging: r8188eu: add error handling of rtw_read32 Dan Carpenter
2021-08-24  7:01                     ` Pavel Skripkin
2021-08-24 15:07                       ` Fabio M. De Francesco
2021-08-22 14:36                 ` [PATCH RFC v2 6/6] staging: r8188eu: make ReadEFuse return an int Pavel Skripkin
2021-08-22 15:30                 ` [PATCH RFC v2 0/6] staging: r8188eu: avoid uninit value bugs Pavel Skripkin
2021-08-22 16:05                   ` Michael Straube
2021-08-22 16:26                     ` Pavel Skripkin
2021-08-22 23:52                       ` Phillip Potter
2021-08-22 17:36                 ` Fabio M. De Francesco
2021-08-22 17:38                   ` Pavel Skripkin
2021-08-22 20:06                     ` Fabio M. De Francesco
2021-08-22 20:19                       ` Pavel Skripkin
2021-08-23  0:12                 ` Phillip Potter
2021-08-23  6:38                   ` Pavel Skripkin
2021-08-23  6:44                   ` Pavel Skripkin
2021-08-22 16:03               ` [PATCH RFC 0/3] " Fabio M. De Francesco
2021-08-22 16:15                 ` Pavel Skripkin
2021-08-22 15:04             ` Phillip Potter

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