Messages in this thread | | | Subject | Re: Misuses of ** ? (was Re: [PATCH 1/1] ASoC: Intel: Atom: add a missing star in a memcpy call) | From | Joe Perches <> | Date | Sun, 28 Aug 2016 13:34:13 -0700 |
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On Sun, 2016-08-28 at 21:38 +0200, Julia Lawall wrote: > On Sun, 28 Aug 2016, Nicolas Iooss wrote: > > On 28/08/16 19:50, Joe Perches wrote: > > > On Sun, 2016-08-28 at 19:39 +0200, Nicolas Iooss wrote: > > >> In sst_prepare_and_post_msg(), when a response is received in "block", > > >> the following code gets executed: > > >> > > >> *data = kzalloc(block->size, GFP_KERNEL); > > >> memcpy(data, (void *) block->data, block->size); > > > > > > Yuck, thanks. > > > > > > Julia, Dan, could cocci or smatch help find any other > > > similar misuses here? [] > I tried the following semantic patch, that is quite general, and the fixed > issue was the only report. > > @@ > expression x,y,sz; > identifier f,g; > @@ > > * *x = f(sz,...); > ... > * g(x,y,sz);
Hi Julia,
This would find exactly the same form, but I think the question is are there assignments of a **pp that should have been *pp
Something like:
@@ type P; P **pp; @@
* pp = <alloc>\|<copy>\|<access>(..., sizeof(P), ...)
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