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* Re: [PATCH v4] Staging: exfat: avoid use of strcpy
  2019-09-11 19:53 [PATCH v4] Staging: exfat: avoid use of strcpy Sandro Volery
@ 2019-09-11 19:03 ` Dan Carpenter
  2019-09-11 19:16   ` Sandro Volery
  0 siblings, 1 reply; 4+ messages in thread
From: Dan Carpenter @ 2019-09-11 19:03 UTC (permalink / raw)
  To: Sandro Volery; +Cc: devel, gregkh, valdis.kletnieks, linux-kernel, linux

On Wed, Sep 11, 2019 at 09:53:03PM +0200, Sandro Volery wrote:
> diff --git a/drivers/staging/exfat/exfat_core.c b/drivers/staging/exfat/exfat_core.c
> index da8c58149c35..4336fee444ce 100644
> --- a/drivers/staging/exfat/exfat_core.c
> +++ b/drivers/staging/exfat/exfat_core.c
> @@ -2960,18 +2960,15 @@ s32 resolve_path(struct inode *inode, char *path, struct chain_t *p_dir,
>  	struct super_block *sb = inode->i_sb;
>  	struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
>  	struct file_id_t *fid = &(EXFAT_I(inode)->fid);
> -
> -	if (strlen(path) >= (MAX_NAME_LENGTH * MAX_CHARSET_SIZE))
> +	

You have added a tab here.

> +	if (strscpy(name_buf, path, sizeof(name_buf)) < 0)
>  		return FFS_INVALIDPATH;
>  
> -	strcpy(name_buf, path);
> -
>  	nls_cstring_to_uniname(sb, p_uniname, name_buf, &lossy);
>  	if (lossy)
>  		return FFS_INVALIDPATH;
>  
> -	fid->size = i_size_read(inode);
> -
> +fid->size = i_size_read(inode);

And you accidentally deleted some white space here.

I use vim, so I have it configured to highlight whitespace at the end of
a line.  I don't remember how it's done now but I googled it for you.
https://vim.fandom.com/wiki/Highlight_unwanted_spaces

regards,
dan carpenter
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^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH v4] Staging: exfat: avoid use of strcpy
  2019-09-11 19:03 ` Dan Carpenter
@ 2019-09-11 19:16   ` Sandro Volery
  2019-09-11 19:22     ` Dan Carpenter
  0 siblings, 1 reply; 4+ messages in thread
From: Sandro Volery @ 2019-09-11 19:16 UTC (permalink / raw)
  To: Dan Carpenter; +Cc: devel, gregkh, valdis.kletnieks, linux-kernel, linux



> On 11 Sep 2019, at 21:06, Dan Carpenter <dan.carpenter@oracle.com> wrote:
> 
> On Wed, Sep 11, 2019 at 09:53:03PM +0200, Sandro Volery wrote:
>> diff --git a/drivers/staging/exfat/exfat_core.c b/drivers/staging/exfat/exfat_core.c
>> index da8c58149c35..4336fee444ce 100644
>> --- a/drivers/staging/exfat/exfat_core.c
>> +++ b/drivers/staging/exfat/exfat_core.c
>> @@ -2960,18 +2960,15 @@ s32 resolve_path(struct inode *inode, char *path, struct chain_t *p_dir,
>>    struct super_block *sb = inode->i_sb;
>>    struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
>>    struct file_id_t *fid = &(EXFAT_I(inode)->fid);
>> -
>> -    if (strlen(path) >= (MAX_NAME_LENGTH * MAX_CHARSET_SIZE))
>> +    
> 
> You have added a tab here.
> 
>> +    if (strscpy(name_buf, path, sizeof(name_buf)) < 0)
>>        return FFS_INVALIDPATH;
>> 
>> -    strcpy(name_buf, path);
>> -
>>    nls_cstring_to_uniname(sb, p_uniname, name_buf, &lossy);
>>    if (lossy)
>>        return FFS_INVALIDPATH;
>> 
>> -    fid->size = i_size_read(inode);
>> -
>> +fid->size = i_size_read(inode);
> 
> And you accidentally deleted some white space here.
> 
> I use vim, so I have it configured to highlight whitespace at the end of
> a line.  I don't remember how it's done now but I googled it for you.
> https://vim.fandom.com/wiki/Highlight_unwanted_spaces


Ugh I'm so sorry I make the most stupid mistakes today.. I was so sure 
this time I got it right!
I'll fix it tomorrow.

Thanks,
Sandro V
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^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH v4] Staging: exfat: avoid use of strcpy
  2019-09-11 19:16   ` Sandro Volery
@ 2019-09-11 19:22     ` Dan Carpenter
  0 siblings, 0 replies; 4+ messages in thread
From: Dan Carpenter @ 2019-09-11 19:22 UTC (permalink / raw)
  To: Sandro Volery; +Cc: devel, gregkh, valdis.kletnieks, linux-kernel, linux

No worries...  We all have days like that occasionally.  :P

regards,
dan carpenter

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devel mailing list
devel@linuxdriverproject.org
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel

^ permalink raw reply	[flat|nested] 4+ messages in thread

* [PATCH v4] Staging: exfat: avoid use of strcpy
@ 2019-09-11 19:53 Sandro Volery
  2019-09-11 19:03 ` Dan Carpenter
  0 siblings, 1 reply; 4+ messages in thread
From: Sandro Volery @ 2019-09-11 19:53 UTC (permalink / raw)
  To: valdis.kletnieks, gregkh, devel, linux-kernel; +Cc: linux, dan.carpenter

Replacing strcpy with strscpy and moving the length check to the
same function.

Suggested-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Sandro Volery <sandro@volery.com>
---

Took a couple attempts to finaly get this right :P

v4: Replaced strlen check
v3: Failed to replace check
v2: Forgot to replace strlen check
v1: original patch
 drivers/staging/exfat/exfat_core.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/exfat/exfat_core.c b/drivers/staging/exfat/exfat_core.c
index da8c58149c35..4336fee444ce 100644
--- a/drivers/staging/exfat/exfat_core.c
+++ b/drivers/staging/exfat/exfat_core.c
@@ -2960,18 +2960,15 @@ s32 resolve_path(struct inode *inode, char *path, struct chain_t *p_dir,
 	struct super_block *sb = inode->i_sb;
 	struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
 	struct file_id_t *fid = &(EXFAT_I(inode)->fid);
-
-	if (strlen(path) >= (MAX_NAME_LENGTH * MAX_CHARSET_SIZE))
+	
+	if (strscpy(name_buf, path, sizeof(name_buf)) < 0)
 		return FFS_INVALIDPATH;
 
-	strcpy(name_buf, path);
-
 	nls_cstring_to_uniname(sb, p_uniname, name_buf, &lossy);
 	if (lossy)
 		return FFS_INVALIDPATH;
 
-	fid->size = i_size_read(inode);
-
+fid->size = i_size_read(inode);
 	p_dir->dir = fid->start_clu;
 	p_dir->size = (s32)(fid->size >> p_fs->cluster_size_bits);
 	p_dir->flags = fid->flags;
-- 
2.23.0

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^ permalink raw reply	[flat|nested] 4+ messages in thread

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2019-09-11 19:53 [PATCH v4] Staging: exfat: avoid use of strcpy Sandro Volery
2019-09-11 19:03 ` Dan Carpenter
2019-09-11 19:16   ` Sandro Volery
2019-09-11 19:22     ` Dan Carpenter

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