On Mon, Apr 14, 2008 at 05:54:52PM +0100, Alan Cox wrote: > > Well, but imagine you have a file /proc/my_secret_file from which you > > are able to read from position A:a and B:b but not from position > > A:b. Concievably, checks for the file position could be bypassed because of > > this race... I know this is kind of dumb example but I can imagine someone > > Unlikely as the ppos passed to the driver is a private copy and the user > could equally use pread/pwrite to specify that offset. pread is banned on proc files implemented via seq_files. And in no-seq_file case, there are MAX_NON_LFS checks which fits into 32 bits. -- 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
