diff options
| author | Gaosheng Cui <cuigaosheng1@huawei.com> | 2022-12-01 09:25:26 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2022-12-09 13:45:00 +0300 |
| commit | 04ba54e5af8f8f0137b08cb51a0b3a2e1ea46c94 (patch) | |
| tree | 7f75dda56e6e86145cbc1d9eadb1f60f3cff8389 /drivers/crypto/img-hash.c | |
| parent | a428636d4c827ebe967aa31a83684b4c8e742ed1 (diff) | |
| download | linux-04ba54e5af8f8f0137b08cb51a0b3a2e1ea46c94.tar.xz | |
crypto: img-hash - Fix variable dereferenced before check 'hdev->req'
Smatch report warning as follows:
drivers/crypto/img-hash.c:366 img_hash_dma_task() warn: variable
dereferenced before check 'hdev->req'
Variable dereferenced should be done after check 'hdev->req',
fix it.
Fixes: d358f1abbf71 ("crypto: img-hash - Add Imagination Technologies hw hash accelerator")
Fixes: 10badea259fa ("crypto: img-hash - Fix null pointer exception")
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/img-hash.c')
| -rw-r--r-- | drivers/crypto/img-hash.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/crypto/img-hash.c b/drivers/crypto/img-hash.c index d8e82d69745d..9629e98bd68b 100644 --- a/drivers/crypto/img-hash.c +++ b/drivers/crypto/img-hash.c @@ -358,12 +358,16 @@ static int img_hash_dma_init(struct img_hash_dev *hdev) static void img_hash_dma_task(unsigned long d) { struct img_hash_dev *hdev = (struct img_hash_dev *)d; - struct img_hash_request_ctx *ctx = ahash_request_ctx(hdev->req); + struct img_hash_request_ctx *ctx; u8 *addr; size_t nbytes, bleft, wsend, len, tbc; struct scatterlist tsg; - if (!hdev->req || !ctx->sg) + if (!hdev->req) + return; + + ctx = ahash_request_ctx(hdev->req); + if (!ctx->sg) return; addr = sg_virt(ctx->sg); |