Messages in this thread | | | Date | Tue, 20 Sep 2005 13:07:39 +0300 (EEST) | From | Pekka J Enberg <> | Subject | Re: p = kmalloc(sizeof(*p), ) |
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On Tue, Sep 20, 2005 at 12:47:32PM +0300, Pekka J Enberg wrote: > > To find candidates, something like: > > > > grep "kmalloc(sizeof([^*]" -r drivers/ | grep -v "sizeof(struct" > > > > And then use my eyes to find real bugs.
On Tue, 20 Sep 2005, Al Viro wrote: > "grep for kmallocs that do not have _either_ form and look for bugs among > them" is hardly usable as an argument in favour of one of them...
I would disagree with that. The _common case_ for allocation is:
p = kmalloc(sizeof(*p), ...);
For which you know that you are allocating enough memory for the struct. Now the only way to screw it up is to write:
p = kmalloc(sizeof(p), ...);
That is trivial to grep for.
Yes, currently, typedefs and open-coded kcalloc's give false positives but that's what kernel janitors are for...
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