crypto: hisilicon/zip - fix mismatch in get/set sgl_sge_nr

[ Upstream commit d74f9340097a881869c4c22ca376654cc2516ecc ]

KASAN reported this Bug:

	[17619.659757] BUG: KASAN: global-out-of-bounds in param_get_int+0x34/0x60
	[17619.673193] Read of size 4 at addr fffff01332d7ed00 by task read_all/1507958
	...
	[17619.698934] The buggy address belongs to the variable:
	[17619.708371]  sgl_sge_nr+0x0/0xffffffffffffa300 [hisi_zip]

There is a mismatch in hisi_zip when get/set the variable sgl_sge_nr.
The type of sgl_sge_nr is u16, and get/set sgl_sge_nr by
param_get/set_int.

Replacing param_get/set_int to param_get/set_ushort can fix this bug.

Fixes: f081fda293ffb ("crypto: hisilicon - add sgl_sge_nr module param for zip")
Signed-off-by: Ye Weihua <yeweihua4@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/crypto/hisilicon/zip/zip_crypto.c b/drivers/crypto/hisilicon/zip/zip_crypto.c
index 9520a41..a91e6e0 100644 (file)
--- a/drivers/crypto/hisilicon/zip/zip_crypto.c
+++ b/drivers/crypto/hisilicon/zip/zip_crypto.c
@@ -122,12 +122,12 @@ static int sgl_sge_nr_set(const char *val, const struct kernel_param *kp)
        if (ret || n == 0 || n > HISI_ACC_SGL_SGE_NR_MAX)
                return -EINVAL;
 
-       return param_set_int(val, kp);
+       return param_set_ushort(val, kp);
 }
 
 static const struct kernel_param_ops sgl_sge_nr_ops = {
        .set = sgl_sge_nr_set,
-       .get = param_get_int,
+       .get = param_get_ushort,
 };
 
 static u16 sgl_sge_nr = HZIP_SGL_SGE_NR;