Messages in this thread | | | Date | Mon, 5 Aug 2019 22:34:26 -0700 | From | Luke Nowakowski-Krijger <> | Subject | Re: [PATCH 5.2 10/20] media: radio-raremono: change devm_k*alloc to k*alloc |
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Hi there,
On Fri, Aug 02, 2019 at 03:04:25AM -0700, Joe Perches wrote: > On Fri, 2019-08-02 at 11:40 +0200, Greg Kroah-Hartman wrote: > > From: Luke Nowakowski-Krijger <lnowakow@eng.ucsd.edu> > > > > commit c666355e60ddb4748ead3bdd983e3f7f2224aaf0 upstream. > > > > Change devm_k*alloc to k*alloc to manually allocate memory > > > > The manual allocation and freeing of memory is necessary because when > > the USB radio is disconnected, the memory associated with devm_k*alloc > > is freed. Meaning if we still have unresolved references to the radio > > device, then we get use-after-free errors. > > > > This patch fixes this by manually allocating memory, and freeing it in > > the v4l2.release callback that gets called when the last radio device > > exits. > > This really should be commented in the code > and not just in the commit changelog as some > unsuspecting person will likely undo this in > the future without one.
You reckon I should submit a patch with the necessary parts commented?
Thanks, - Luke
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