Re: [patch 08/15] fat: dont call notify_change

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



> > From: Miklos Szeredi <mszeredi@xxxxxxx>
> >
> > The FAT_IOCTL_SET_ATTRIBUTES ioctl() calls notify_change() to change
> > the file mode before changing the inode attributes.  Replace with
> > explicit call to fat_setattr().
> >
> > This is equivalent, except that security_inode_setattr() is not called
> > before fat_setattr().  I think this is not needed, since the mode
> > change is just a side effect of the attribute change.
> >
> > Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxx>
> > CC: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
> 
> Looks good. I'm not sure about the intent of security_inode_setattr()
> though.

security_inode_setattr() will call into the security module (selinux,
smack, apparmor) to check if the file mode change is permitted or not.
It's not really applicable to this case, since AFAICS the mode change
here is just a side effect of the attribute change.

If it's not just a side effect, but another way to change the file
mode, then the whole code is very wrong.  chmod() is perfectly fine
for changing the file mode, there's no need for a separate ioctl to
perform exactly the same task.

Miklos
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]
  Powered by Linux