Hello LABBE Corentin,
The patch 6c2b74d4774f: "crypto: sahara - check return value of
sg_nents_for_len" from Nov 4, 2015, leads to the following static
checker warning:
drivers/crypto/sahara.c:480 sahara_hw_descriptor_create()
warn: unsigned 'dev->nb_in_sg' is never less than zero.
drivers/crypto/sahara.c
479 dev->nb_in_sg = sg_nents_for_len(dev->in_sg, dev->total);
480 if (dev->nb_in_sg < 0) {
^^^^^^^^^^^^^^^^^
Unsigned is never less than zero.
481 dev_err(dev->device, "Invalid numbers of src SG.\n");
482 return dev->nb_in_sg;
483 }
There are several other similar bugs as well:
drivers/crypto/sahara.c:485 sahara_hw_descriptor_create() warn: unsigned
'dev->nb_out_sg' is never less than zero.
drivers/crypto/sahara.c:804 sahara_sha_hw_links_create() warn: unsigned
'dev->nb_in_sg' is never less than zero.
drivers/crypto/picoxcell_crypto.c:298 spacc_sg_to_ddt() warn: unsigned 'nents'
is never less than zero.
drivers/crypto/picoxcell_crypto.c:338 spacc_aead_make_ddts() warn: unsigned
'src_nents' is never less than zero.
drivers/crypto/picoxcell_crypto.c:348 spacc_aead_make_ddts() warn: unsigned
'dst_nents' is never less than zero.
regards,
dan carpenter
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