Re: [f2fs-dev] [PATCH] f2fs: relax permission for atomic/volatile ioctls

From	Chao Yu <chao@kernel.org>
Newsgroups	linux.kernel
Subject	Re: [f2fs-dev] [PATCH] f2fs: relax permission for atomic/volatile ioctls
Date	2017-07-07 03:00 +0200
Message-ID	<u0pMJ-4D0-1@gated-at.bofh.it> (permalink)
References	<u04Ii-6v1-3@gated-at.bofh.it> <u0p0l-4n9-7@gated-at.bofh.it> <u0pa1-4qf-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 2017/7/7 8:16, Jaegeuk Kim wrote:
> On 07/07, Chao Yu wrote:
>> On 2017/7/6 10:23, Jaegeuk Kim wrote:
>>> This patch allows atomic/volatile ioctls for sqlite under sdcardfs.
>>
>> Out of curiosity, we will lose some capable when passing through sdcardfs?
> 
> I don't think so. But, it seems a test applicaion tries to access database from
> difference uid.

Oh, is that really allowed? if the sqlite database is public in sdcard directory,
application needs to apply WRITE_EXTERNAL_STORAGE in order to add itself to
sdcard_rw group, then it can access the database. Right?

Thanks,

> 
> Thanks,
> 
>>
>> Thanks,
>>
>>>
>>> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>> ---
>>>  fs/f2fs/file.c | 15 ---------------
>>>  1 file changed, 15 deletions(-)
>>>
>>> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
>>> index f5d6357e8360..dd8f5d2caa48 100644
>>> --- a/fs/f2fs/file.c
>>> +++ b/fs/f2fs/file.c
>>> @@ -1587,9 +1587,6 @@ static int f2fs_ioc_start_atomic_write(struct file *filp)
>>>  	struct inode *inode = file_inode(filp);
>>>  	int ret;
>>>  
>>> -	if (!inode_owner_or_capable(inode))
>>> -		return -EACCES;
>>> -
>>>  	if (!S_ISREG(inode->i_mode))
>>>  		return -EINVAL;
>>>  
>>> @@ -1636,9 +1633,6 @@ static int f2fs_ioc_commit_atomic_write(struct file *filp)
>>>  	struct inode *inode = file_inode(filp);
>>>  	int ret;
>>>  
>>> -	if (!inode_owner_or_capable(inode))
>>> -		return -EACCES;
>>> -
>>>  	ret = mnt_want_write_file(filp);
>>>  	if (ret)
>>>  		return ret;
>>> @@ -1672,9 +1666,6 @@ static int f2fs_ioc_start_volatile_write(struct file *filp)
>>>  	struct inode *inode = file_inode(filp);
>>>  	int ret;
>>>  
>>> -	if (!inode_owner_or_capable(inode))
>>> -		return -EACCES;
>>> -
>>>  	if (!S_ISREG(inode->i_mode))
>>>  		return -EINVAL;
>>>  
>>> @@ -1707,9 +1698,6 @@ static int f2fs_ioc_release_volatile_write(struct file *filp)
>>>  	struct inode *inode = file_inode(filp);
>>>  	int ret;
>>>  
>>> -	if (!inode_owner_or_capable(inode))
>>> -		return -EACCES;
>>> -
>>>  	ret = mnt_want_write_file(filp);
>>>  	if (ret)
>>>  		return ret;
>>> @@ -1736,9 +1724,6 @@ static int f2fs_ioc_abort_volatile_write(struct file *filp)
>>>  	struct inode *inode = file_inode(filp);
>>>  	int ret;
>>>  
>>> -	if (!inode_owner_or_capable(inode))
>>> -		return -EACCES;
>>> -
>>>  	ret = mnt_want_write_file(filp);
>>>  	if (ret)
>>>  		return ret;
>>>

Thread

[PATCH] f2fs: relax permission for atomic/volatile ioctls Jaegeuk Kim <jaegeuk@kernel.org> - 2017-07-06 04:30 +0200
  Re: [f2fs-dev] [PATCH] f2fs: relax permission for atomic/volatile  ioctls Chao Yu <chao@kernel.org> - 2017-07-07 02:10 +0200
    Re: [f2fs-dev] [PATCH] f2fs: relax permission for atomic/volatile  ioctls Jaegeuk Kim <jaegeuk@kernel.org> - 2017-07-07 02:20 +0200
      Re: [f2fs-dev] [PATCH] f2fs: relax permission for atomic/volatile  ioctls Chao Yu <chao@kernel.org> - 2017-07-07 03:00 +0200
        Re: 答复: [f2fs-dev] [PATCH]  f2fs: relax permission for atomic/volatile ioctls Jaegeuk Kim <jaegeuk@kernel.org> - 2017-07-07 04:20 +0200
          Re: 答复: [f2fs-dev] [PATCH] f2fs: relax permission for atomic/volatile ioctls "gaoxiang (P)" <gaoxiang25@huawei.com> - 2017-07-07 04:30 +0200
  Re: [PATCH] f2fs: relax permission for atomic/volatile ioctls Eric Biggers <ebiggers3@gmail.com> - 2017-07-07 04:10 +0200

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