crypto: hisilicon - Fix reference after free of memories on error path
authorJohn Garry <john.garry@huawei.com>
Mon, 5 Nov 2018 12:35:15 +0000 (20:35 +0800)
committerHerbert Xu <herbert@gondor.apana.org.au>
Fri, 9 Nov 2018 09:35:43 +0000 (17:35 +0800)
commit0b0cf6af3f3151c26c27e8e51def5527091c3e69
treebed8cd167637cda4537c79cae21371a4966c9aed
parent68a031d22c57b94870ba13513c9d93b8a8119ab2
crypto: hisilicon - Fix reference after free of memories on error path

coccicheck currently warns of the following issues in the driver:
drivers/crypto/hisilicon/sec/sec_algs.c:864:51-66: ERROR: reference preceded by free on line 812
drivers/crypto/hisilicon/sec/sec_algs.c:864:40-49: ERROR: reference preceded by free on line 813
drivers/crypto/hisilicon/sec/sec_algs.c:861:8-24: ERROR: reference preceded by free on line 814
drivers/crypto/hisilicon/sec/sec_algs.c:860:41-51: ERROR: reference preceded by free on line 815
drivers/crypto/hisilicon/sec/sec_algs.c:867:7-18: ERROR: reference preceded by free on line 816

It would appear than on certain error paths that we may attempt reference-
after-free some memories.

This patch fixes those issues. The solution doesn't look perfect, but
having same memories free'd possibly from separate functions makes it
tricky.

Fixes: 915e4e8413da ("crypto: hisilicon - SEC security accelerator driver")
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
drivers/crypto/hisilicon/sec/sec_algs.c