Messages in this thread | | | Date | Wed, 2 Dec 2020 11:25:46 -0800 | From | Kees Cook <> | Subject | Re: [PATCH] pstore: Tidy up an error check |
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On Wed, Dec 02, 2020 at 09:45:31AM +0300, Dan Carpenter wrote: > The crypto_alloc_comp() function never returns NULL, it returns error > pointers on error. > > Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
I replied to an identical patch yesterday, actually: https://lore.kernel.org/lkml/202012011215.B9BF24A6D@keescook/
Using IS_ERR_OR_NULL() is more robust, and this isn't fast path, so I'd prefer to keep it that way.
-Kees
> --- > fs/pstore/platform.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c > index 36714df37d5d..b7a2a2a31dee 100644 > --- a/fs/pstore/platform.c > +++ b/fs/pstore/platform.c > @@ -315,7 +315,7 @@ static void allocate_buf_for_compression(void) > } > > ctx = crypto_alloc_comp(zbackend->name, 0, 0); > - if (IS_ERR_OR_NULL(ctx)) { > + if (IS_ERR(ctx)) { > kfree(buf); > pr_err("crypto_alloc_comp('%s') failed: %ld\n", zbackend->name, > PTR_ERR(ctx)); > -- > 2.29.2 >
-- Kees Cook
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