Re: [PATCH]:Return proper error value on failure of dentry_open

From: vibi sreenivasan
Date: Mon Jun 01 2009 - 04:13:14 EST



hi,
thanks for pointing that out.
> > out:
> > mutex_unlock(&iint->mutex);
> > - if (file)
> > + if (IS_ERR(file))
> > fput(file);
extremely sorry it was
if(!IS_ERR(file))
fput(file);
i will send that patch again

>
> This makes no sense at all. If it is IS_ERR, i.e. some negative value,
> you don't want to pass it to fput. 'if (file)' was perfectly correct.
if(file) is true for file != 0 , ie even if file is a -ve error
value.
so while fput dereference file ,this can cause a bug to be
triggered.
I actually had one.

Thanks & regards
vibi sreenivasan
>


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/