* [bug report] crypto: omap-sham - add support functions for sg based data handling
@ 2016-10-13 9:31 Dan Carpenter
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From: Dan Carpenter @ 2016-10-13 9:31 UTC (permalink / raw)
To: t-kristo; +Cc: linux-crypto
Hello Tero Kristo,
This is a semi-automatic email about new static checker warnings.
The patch f19de1bc67a0: "crypto: omap-sham - add support functions
for sg based data handling" from Sep 19, 2016, leads to the following
Smatch complaint:
drivers/crypto/omap-sham.c:808 omap_sham_prepare_request()
warn: variable dereferenced before check 'req' (see line 801)
drivers/crypto/omap-sham.c
800 {
801 struct omap_sham_reqctx *rctx = ahash_request_ctx(req);
^^^
New dereference inside function.
802 int bs;
803 int ret;
804 int nbytes;
805 bool final = rctx->flags & BIT(FLAGS_FINUP);
806 int xmit_len, hash_later;
807
808 if (!req)
^^^^
New check is too late.
809 return 0;
810
regards,
dan carpenter
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2016-10-13 9:31 [bug report] crypto: omap-sham - add support functions for sg based data handling Dan Carpenter
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