Re: missing mnt_drop_write() on open error

[Miklos Szeredi <miklos@szeredi.hu>]

> > Btw, may_open() doesn't do mnt_want_write() around the truncation if
> > file is opened with O_TRUNC | O_RDONLY.
> 
> What's the path to may_open() in that case?  open_namei() should wrap
> all callers other than nfs, and it does:
> 
> 	/* O_TRUNC implies we need access checks for write permissions */
>         if (flag & O_TRUNC)
>                 acc_mode |= MAY_WRITE;
> 
> Which should trigger the may_open() code.  

Ah, I missed that.

Thanks,
Miklos
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