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* [ammarfaizi2-block:kvalo/ath/pending 3/9] drivers/net/wireless/ath/wil6210/debugfs.c:1030:9: warning: variable 'rc' is uninitialized when used here
@ 2022-07-24 19:44 kernel test robot
  2022-07-25 16:58   ` Ammar Faizi
  0 siblings, 1 reply; 7+ messages in thread
From: kernel test robot @ 2022-07-24 19:44 UTC (permalink / raw)
  To: Dan Carpenter
  Cc: llvm, kbuild-all, Ammar Faizi, GNU/Weeb Mailing List,
	linux-kernel, Kalle Valo

tree:   https://github.com/ammarfaizi2/linux-block kvalo/ath/pending
head:   086f67ba21ede199307e78476353bda9ffef982c
commit: 7a4836560a6198d245d5732e26f94898b12eb760 [3/9] wifi: wil6210: debugfs: fix info leak in wil_write_file_wmi()
config: powerpc-randconfig-r002-20220718 (https://download.01.org/0day-ci/archive/20220725/202207250332.5ud26AGE-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d74b88c69dc2644bd0dc5d64e2d7413a0d4040e5)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install powerpc cross compiling tool for clang build
        # apt-get install binutils-powerpc-linux-gnu
        # https://github.com/ammarfaizi2/linux-block/commit/7a4836560a6198d245d5732e26f94898b12eb760
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block kvalo/ath/pending
        git checkout 7a4836560a6198d245d5732e26f94898b12eb760
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/net/wireless/ath/wil6210/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/net/wireless/ath/wil6210/debugfs.c:1030:9: warning: variable 'rc' is uninitialized when used here [-Wuninitialized]
           return rc;
                  ^~
   drivers/net/wireless/ath/wil6210/debugfs.c:1013:8: note: initialize the variable 'rc' to silence this warning
           int rc, rc1;
                 ^
                  = 0
   1 warning generated.


vim +/rc +1030 drivers/net/wireless/ath/wil6210/debugfs.c

2be7d22f062535 Vladimir Kondratiev 2012-12-20  1000  
ff974e40833413 Vladimir Kondratiev 2014-06-16  1001  /* Write WMI command (w/o mbox header) to this file to send it
ff974e40833413 Vladimir Kondratiev 2014-06-16  1002   * WMI starts from wil6210_mbox_hdr_wmi header
ff974e40833413 Vladimir Kondratiev 2014-06-16  1003   */
ff974e40833413 Vladimir Kondratiev 2014-06-16  1004  static ssize_t wil_write_file_wmi(struct file *file, const char __user *buf,
ff974e40833413 Vladimir Kondratiev 2014-06-16  1005  				  size_t len, loff_t *ppos)
ff974e40833413 Vladimir Kondratiev 2014-06-16  1006  {
ff974e40833413 Vladimir Kondratiev 2014-06-16  1007  	struct wil6210_priv *wil = file->private_data;
e00243fab84b4e Lior David          2018-02-26  1008  	struct wil6210_vif *vif = ndev_to_vif(wil->main_ndev);
b874ddecae0a08 Lior David          2016-03-01  1009  	struct wmi_cmd_hdr *wmi;
ff974e40833413 Vladimir Kondratiev 2014-06-16  1010  	void *cmd;
b874ddecae0a08 Lior David          2016-03-01  1011  	int cmdlen = len - sizeof(struct wmi_cmd_hdr);
ff974e40833413 Vladimir Kondratiev 2014-06-16  1012  	u16 cmdid;
ff974e40833413 Vladimir Kondratiev 2014-06-16  1013  	int rc, rc1;
ff974e40833413 Vladimir Kondratiev 2014-06-16  1014  
7a4836560a6198 Dan Carpenter       2022-07-15  1015  	if (cmdlen < 0 || *ppos != 0)
ff974e40833413 Vladimir Kondratiev 2014-06-16  1016  		return -EINVAL;
ff974e40833413 Vladimir Kondratiev 2014-06-16  1017  
7a4836560a6198 Dan Carpenter       2022-07-15  1018  	wmi = memdup_user(buf, len);
7a4836560a6198 Dan Carpenter       2022-07-15  1019  	if (IS_ERR(wmi))
7a4836560a6198 Dan Carpenter       2022-07-15  1020  		return PTR_ERR(wmi);
ff974e40833413 Vladimir Kondratiev 2014-06-16  1021  
69218a48005d0c Lior David          2016-03-21  1022  	cmd = (cmdlen > 0) ? &wmi[1] : NULL;
b874ddecae0a08 Lior David          2016-03-01  1023  	cmdid = le16_to_cpu(wmi->command_id);
ff974e40833413 Vladimir Kondratiev 2014-06-16  1024  
e00243fab84b4e Lior David          2018-02-26  1025  	rc1 = wmi_send(wil, cmdid, vif->mid, cmd, cmdlen);
ff974e40833413 Vladimir Kondratiev 2014-06-16  1026  	kfree(wmi);
ff974e40833413 Vladimir Kondratiev 2014-06-16  1027  
af3db60a30331d Lazar Alexei        2017-01-20  1028  	wil_info(wil, "0x%04x[%d] -> %d\n", cmdid, cmdlen, rc1);
ff974e40833413 Vladimir Kondratiev 2014-06-16  1029  
ff974e40833413 Vladimir Kondratiev 2014-06-16 @1030  	return rc;
ff974e40833413 Vladimir Kondratiev 2014-06-16  1031  }
ff974e40833413 Vladimir Kondratiev 2014-06-16  1032  

:::::: The code at line 1030 was first introduced by commit
:::::: ff974e4083341383d3dd4079e52ed30f57f376f0 wil6210: debugfs interface to send raw WMI command

:::::: TO: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
:::::: CC: John W. Linville <linville@tuxdriver.com>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

^ permalink raw reply	[flat|nested] 7+ messages in thread
* [PATCH] wifi: wil6210: debugfs: fix uninitialized variable use in `wil_write_file_wmi()`
  2022-07-24 19:44 [ammarfaizi2-block:kvalo/ath/pending 3/9] drivers/net/wireless/ath/wil6210/debugfs.c:1030:9: warning: variable 'rc' is uninitialized when used here kernel test robot
@ 2022-07-25 16:58   ` Ammar Faizi
  0 siblings, 0 replies; 7+ messages in thread
From: Ammar Faizi @ 2022-07-24 20:26 UTC (permalink / raw)
  To: Kalle Valo
  Cc: Ammar Faizi, Kalle Valo, Eric Dumazet, Jakub Kicinski,
	Paolo Abeni, Dan Carpenter, Johannes Berg,
	Linux Wireless Mailing List, netdev Mailing List,
	Linux Kernel Mailing List, GNU/Weeb Mailing List, llvm,
	kbuild-all, kernel test robot

Commit 7a4836560a61 changes simple_write_to_buffer() with memdup_user()
but it forgets to change the value to be returned that came from
simple_write_to_buffer() call. It results in the following warning:

  warning: variable 'rc' is uninitialized when used here [-Wuninitialized]
           return rc;
                  ^~

Remove rc variable and just return the passed in length if the
memdup_user() succeeds.

Cc: Dan Carpenter <dan.carpenter@oracle.com>
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 7a4836560a6198d245d5732e26f94898b12eb760 ("wifi: wil6210: debugfs: fix info leak in wil_write_file_wmi()")
Fixes: ff974e4083341383d3dd4079e52ed30f57f376f0 ("wil6210: debugfs interface to send raw WMI command")
Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
---
 drivers/net/wireless/ath/wil6210/debugfs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/wil6210/debugfs.c b/drivers/net/wireless/ath/wil6210/debugfs.c
index fe84362718de..04d1aa0e2d35 100644
--- a/drivers/net/wireless/ath/wil6210/debugfs.c
+++ b/drivers/net/wireless/ath/wil6210/debugfs.c
@@ -1010,7 +1010,7 @@ static ssize_t wil_write_file_wmi(struct file *file, const char __user *buf,
 	void *cmd;
 	int cmdlen = len - sizeof(struct wmi_cmd_hdr);
 	u16 cmdid;
-	int rc, rc1;
+	int rc1;
 
 	if (cmdlen < 0 || *ppos != 0)
 		return -EINVAL;
@@ -1027,7 +1027,7 @@ static ssize_t wil_write_file_wmi(struct file *file, const char __user *buf,
 
 	wil_info(wil, "0x%04x[%d] -> %d\n", cmdid, cmdlen, rc1);
 
-	return rc;
+	return len;
 }
 
 static const struct file_operations fops_wmi = {

base-commit: 086f67ba21ede199307e78476353bda9ffef982c
-- 
Ammar Faizi


^ permalink raw reply related	[flat|nested] 7+ messages in thread
* Re: [PATCH] wifi: wil6210: debugfs: fix uninitialized variable use in `wil_write_file_wmi()`
  2022-07-25 16:58   ` Ammar Faizi
@ 2022-07-25  6:34     ` Dan Carpenter
  -1 siblings, 0 replies; 7+ messages in thread
From: Dan Carpenter @ 2022-07-25  6:34 UTC (permalink / raw)
  To: Ammar Faizi
  Cc: Kalle Valo, Kalle Valo, Eric Dumazet, Jakub Kicinski,
	Paolo Abeni, Johannes Berg, Linux Wireless Mailing List,
	netdev Mailing List, Linux Kernel Mailing List,
	GNU/Weeb Mailing List, llvm, kbuild-all, kernel test robot

On Mon, Jul 25, 2022 at 03:26:18AM +0700, Ammar Faizi wrote:
> Commit 7a4836560a61 changes simple_write_to_buffer() with memdup_user()
> but it forgets to change the value to be returned that came from
> simple_write_to_buffer() call. It results in the following warning:
> 
>   warning: variable 'rc' is uninitialized when used here [-Wuninitialized]
>            return rc;
>                   ^~
> 
> Remove rc variable and just return the passed in length if the
> memdup_user() succeeds.
> 
> Cc: Dan Carpenter <dan.carpenter@oracle.com>
> Reported-by: kernel test robot <lkp@intel.com>
> Fixes: 7a4836560a6198d245d5732e26f94898b12eb760 ("wifi: wil6210: debugfs: fix info leak in wil_write_file_wmi()")
> Fixes: ff974e4083341383d3dd4079e52ed30f57f376f0 ("wil6210: debugfs interface to send raw WMI command")
> Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>

Oops.  Sorry!

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>

regards,
dan carpenter


^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: [PATCH] wifi: wil6210: debugfs: fix uninitialized variable use in `wil_write_file_wmi()`
@ 2022-07-25  6:34     ` Dan Carpenter
  0 siblings, 0 replies; 7+ messages in thread
From: Dan Carpenter @ 2022-07-25  6:34 UTC (permalink / raw)
  To: kbuild-all

[-- Attachment #1: Type: text/plain, Size: 986 bytes --]

On Mon, Jul 25, 2022 at 03:26:18AM +0700, Ammar Faizi wrote:
> Commit 7a4836560a61 changes simple_write_to_buffer() with memdup_user()
> but it forgets to change the value to be returned that came from
> simple_write_to_buffer() call. It results in the following warning:
> 
>   warning: variable 'rc' is uninitialized when used here [-Wuninitialized]
>            return rc;
>                   ^~
> 
> Remove rc variable and just return the passed in length if the
> memdup_user() succeeds.
> 
> Cc: Dan Carpenter <dan.carpenter@oracle.com>
> Reported-by: kernel test robot <lkp@intel.com>
> Fixes: 7a4836560a6198d245d5732e26f94898b12eb760 ("wifi: wil6210: debugfs: fix info leak in wil_write_file_wmi()")
> Fixes: ff974e4083341383d3dd4079e52ed30f57f376f0 ("wil6210: debugfs interface to send raw WMI command")
> Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>

Oops.  Sorry!

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>

regards,
dan carpenter

^ permalink raw reply	[flat|nested] 7+ messages in thread
* [PATCH] wifi: wil6210: debugfs: fix uninitialized variable use in `wil_write_file_wmi()`
@ 2022-07-25 16:58   ` Ammar Faizi
  0 siblings, 0 replies; 7+ messages in thread
From: Ammar Faizi @ 2022-07-25 16:58 UTC (permalink / raw)
  To: kbuild-all

[-- Attachment #1: Type: text/plain, Size: 1735 bytes --]

Commit 7a4836560a61 changes simple_write_to_buffer() with memdup_user()
but it forgets to change the value to be returned that came from
simple_write_to_buffer() call. It results in the following warning:

  warning: variable 'rc' is uninitialized when used here [-Wuninitialized]
           return rc;
                  ^~

Remove rc variable and just return the passed in length if the
memdup_user() succeeds.

Cc: Dan Carpenter <dan.carpenter@oracle.com>
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 7a4836560a6198d245d5732e26f94898b12eb760 ("wifi: wil6210: debugfs: fix info leak in wil_write_file_wmi()")
Fixes: ff974e4083341383d3dd4079e52ed30f57f376f0 ("wil6210: debugfs interface to send raw WMI command")
Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
---
 drivers/net/wireless/ath/wil6210/debugfs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/wil6210/debugfs.c b/drivers/net/wireless/ath/wil6210/debugfs.c
index fe84362718de..04d1aa0e2d35 100644
--- a/drivers/net/wireless/ath/wil6210/debugfs.c
+++ b/drivers/net/wireless/ath/wil6210/debugfs.c
@@ -1010,7 +1010,7 @@ static ssize_t wil_write_file_wmi(struct file *file, const char __user *buf,
 	void *cmd;
 	int cmdlen = len - sizeof(struct wmi_cmd_hdr);
 	u16 cmdid;
-	int rc, rc1;
+	int rc1;
 
 	if (cmdlen < 0 || *ppos != 0)
 		return -EINVAL;
@@ -1027,7 +1027,7 @@ static ssize_t wil_write_file_wmi(struct file *file, const char __user *buf,
 
 	wil_info(wil, "0x%04x[%d] -> %d\n", cmdid, cmdlen, rc1);
 
-	return rc;
+	return len;
 }
 
 static const struct file_operations fops_wmi = {

base-commit: 086f67ba21ede199307e78476353bda9ffef982c
-- 
Ammar Faizi

^ permalink raw reply related	[flat|nested] 7+ messages in thread
* Re: [PATCH] wifi: wil6210: debugfs: fix uninitialized variable use in `wil_write_file_wmi()`
  2022-07-25 16:58   ` Ammar Faizi
@ 2022-07-27 10:20     ` Kalle Valo
  -1 siblings, 0 replies; 7+ messages in thread
From: Kalle Valo @ 2022-07-27 10:20 UTC (permalink / raw)
  To: Ammar Faizi
  Cc: Ammar Faizi, Kalle Valo, Eric Dumazet, Jakub Kicinski,
	Paolo Abeni, Dan Carpenter, Johannes Berg,
	Linux Wireless Mailing List, netdev Mailing List,
	Linux Kernel Mailing List, GNU/Weeb Mailing List, llvm,
	kbuild-all, kernel test robot

Ammar Faizi <ammarfaizi2@gnuweeb.org> wrote:

> Commit 7a4836560a61 changes simple_write_to_buffer() with memdup_user()
> but it forgets to change the value to be returned that came from
> simple_write_to_buffer() call. It results in the following warning:
> 
>   warning: variable 'rc' is uninitialized when used here [-Wuninitialized]
>            return rc;
>                   ^~
> 
> Remove rc variable and just return the passed in length if the
> memdup_user() succeeds.
> 
> Cc: Dan Carpenter <dan.carpenter@oracle.com>
> Reported-by: kernel test robot <lkp@intel.com>
> Fixes: 7a4836560a6198d245d5732e26f94898b12eb760 ("wifi: wil6210: debugfs: fix info leak in wil_write_file_wmi()")
> Fixes: ff974e4083341383d3dd4079e52ed30f57f376f0 ("wil6210: debugfs interface to send raw WMI command")
> Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
> Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
> Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>

Patch applied to ath-next branch of ath.git, thanks.

d578e0af3a00 wifi: wil6210: debugfs: fix uninitialized variable use in `wil_write_file_wmi()`

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20220724202452.61846-1-ammar.faizi@intel.com/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches


^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: [PATCH] wifi: wil6210: debugfs: fix uninitialized variable use in `wil_write_file_wmi()`
@ 2022-07-27 10:20     ` Kalle Valo
  0 siblings, 0 replies; 7+ messages in thread
From: Kalle Valo @ 2022-07-27 10:20 UTC (permalink / raw)
  To: kbuild-all

[-- Attachment #1: Type: text/plain, Size: 1331 bytes --]

Ammar Faizi <ammarfaizi2@gnuweeb.org> wrote:

> Commit 7a4836560a61 changes simple_write_to_buffer() with memdup_user()
> but it forgets to change the value to be returned that came from
> simple_write_to_buffer() call. It results in the following warning:
> 
>   warning: variable 'rc' is uninitialized when used here [-Wuninitialized]
>            return rc;
>                   ^~
> 
> Remove rc variable and just return the passed in length if the
> memdup_user() succeeds.
> 
> Cc: Dan Carpenter <dan.carpenter@oracle.com>
> Reported-by: kernel test robot <lkp@intel.com>
> Fixes: 7a4836560a6198d245d5732e26f94898b12eb760 ("wifi: wil6210: debugfs: fix info leak in wil_write_file_wmi()")
> Fixes: ff974e4083341383d3dd4079e52ed30f57f376f0 ("wil6210: debugfs interface to send raw WMI command")
> Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
> Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
> Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>

Patch applied to ath-next branch of ath.git, thanks.

d578e0af3a00 wifi: wil6210: debugfs: fix uninitialized variable use in `wil_write_file_wmi()`

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20220724202452.61846-1-ammar.faizi(a)intel.com/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches

^ permalink raw reply	[flat|nested] 7+ messages in thread
end of thread, other threads:[~2022-07-27 10:20 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-07-24 19:44 [ammarfaizi2-block:kvalo/ath/pending 3/9] drivers/net/wireless/ath/wil6210/debugfs.c:1030:9: warning: variable 'rc' is uninitialized when used here kernel test robot
2022-07-24 20:26 ` [PATCH] wifi: wil6210: debugfs: fix uninitialized variable use in `wil_write_file_wmi()` Ammar Faizi
2022-07-25 16:58   ` Ammar Faizi
2022-07-25  6:34   ` Dan Carpenter
2022-07-25  6:34     ` Dan Carpenter
2022-07-27 10:20   ` Kalle Valo
2022-07-27 10:20     ` Kalle Valo

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