Re: [PATCH] ima: Fix a use after free in ima_read_modsig()

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On Thu, 2019-08-08 at 14:45 +0300, Dan Carpenter wrote:
> On Thu, Aug 08, 2019 at 07:17:22AM -0400, Mimi Zohar wrote:
> > On Thu, 2019-08-08 at 13:33 +0300, Dan Carpenter wrote:
> > > This code frees "hdr" and then dereferences it on the next line to get
> > > the error code.
> > > 
> > > Fixes: 39b07096364a ("ima: Implement support for module-style appended signatures")
> > > Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> > 
> > Thanks, Dan.  Julia already reported this.  Thiago posted a patch last
> > night.  Just getting to it now.  Can I add your Reviewed-by or Tested-
> > by?
> 
> I haven't seen the other patch so Reviewed-by seems like the wrong
> thing.  I don't really need any sort of credit.  I'm just going through
> my backlog of warnings from being out of office.  Perhaps Reported-by?

That works.  FYI, your solution and Thiago's are exactly the same.[1]

Mimi

[1] https://lore.kernel.org/linux-integrity/8736ico5ax.fsf@morokweng.localdomain/T/#u



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