* Re: [PATCH] crypto: virtio/akcipher - Fix stack overflow on memcpy
2024-01-30 11:27 [PATCH] crypto: virtio/akcipher - Fix stack overflow on memcpy zhenwei pi
@ 2024-01-31 19:10 ` Nathan Chancellor
2024-01-31 22:36 ` Michael S. Tsirkin
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Nathan Chancellor @ 2024-01-31 19:10 UTC (permalink / raw)
To: zhenwei pi
Cc: arei.gonglei, mst, jasowang, herbert, xuanzhuo, virtualization,
linux-crypto, linux-kernel, davem
On Tue, Jan 30, 2024 at 07:27:40PM +0800, zhenwei pi wrote:
> sizeof(struct virtio_crypto_akcipher_session_para) is less than
> sizeof(struct virtio_crypto_op_ctrl_req::u), copying more bytes from
> stack variable leads stack overflow. Clang reports this issue by
> commands:
> make -j CC=clang-14 mrproper >/dev/null 2>&1
> make -j O=/tmp/crypto-build CC=clang-14 allmodconfig >/dev/null 2>&1
> make -j O=/tmp/crypto-build W=1 CC=clang-14 drivers/crypto/virtio/
> virtio_crypto_akcipher_algs.o
>
> Fixes: 59ca6c93387d ("virtio-crypto: implement RSA algorithm")
> Link: https://lore.kernel.org/all/0a194a79-e3a3-45e7-be98-83abd3e1cb7e@roeck-us.net/
> Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
I can confirm this resolves the warning for me as well.
Tested-by: Nathan Chancellor <nathan@kernel.org> # build
I suspect Guenter should have a formal Reported-by tag. Should this be
CC'd for stable@ as well?
Cheers,
Nathan
> ---
> drivers/crypto/virtio/virtio_crypto_akcipher_algs.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c b/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
> index 2621ff8a9376..de53eddf6796 100644
> --- a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
> +++ b/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
> @@ -104,7 +104,8 @@ static void virtio_crypto_dataq_akcipher_callback(struct virtio_crypto_request *
> }
>
> static int virtio_crypto_alg_akcipher_init_session(struct virtio_crypto_akcipher_ctx *ctx,
> - struct virtio_crypto_ctrl_header *header, void *para,
> + struct virtio_crypto_ctrl_header *header,
> + struct virtio_crypto_akcipher_session_para *para,
> const uint8_t *key, unsigned int keylen)
> {
> struct scatterlist outhdr_sg, key_sg, inhdr_sg, *sgs[3];
> @@ -128,7 +129,7 @@ static int virtio_crypto_alg_akcipher_init_session(struct virtio_crypto_akcipher
>
> ctrl = &vc_ctrl_req->ctrl;
> memcpy(&ctrl->header, header, sizeof(ctrl->header));
> - memcpy(&ctrl->u, para, sizeof(ctrl->u));
> + memcpy(&ctrl->u.akcipher_create_session.para, para, sizeof(*para));
> input = &vc_ctrl_req->input;
> input->status = cpu_to_le32(VIRTIO_CRYPTO_ERR);
>
> --
> 2.34.1
>
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH] crypto: virtio/akcipher - Fix stack overflow on memcpy
2024-01-30 11:27 [PATCH] crypto: virtio/akcipher - Fix stack overflow on memcpy zhenwei pi
2024-01-31 19:10 ` Nathan Chancellor
@ 2024-01-31 22:36 ` Michael S. Tsirkin
2024-02-01 5:49 ` Jason Wang
2024-02-09 5:00 ` Herbert Xu
3 siblings, 0 replies; 5+ messages in thread
From: Michael S. Tsirkin @ 2024-01-31 22:36 UTC (permalink / raw)
To: zhenwei pi
Cc: arei.gonglei, jasowang, herbert, xuanzhuo, virtualization, nathan,
linux-crypto, linux-kernel, davem
On Tue, Jan 30, 2024 at 07:27:40PM +0800, zhenwei pi wrote:
> sizeof(struct virtio_crypto_akcipher_session_para) is less than
> sizeof(struct virtio_crypto_op_ctrl_req::u), copying more bytes from
> stack variable leads stack overflow. Clang reports this issue by
> commands:
> make -j CC=clang-14 mrproper >/dev/null 2>&1
> make -j O=/tmp/crypto-build CC=clang-14 allmodconfig >/dev/null 2>&1
> make -j O=/tmp/crypto-build W=1 CC=clang-14 drivers/crypto/virtio/
> virtio_crypto_akcipher_algs.o
>
> Fixes: 59ca6c93387d ("virtio-crypto: implement RSA algorithm")
> Link: https://lore.kernel.org/all/0a194a79-e3a3-45e7-be98-83abd3e1cb7e@roeck-us.net/
> Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Cc: stable@vger.kernel.org
Acked-by: Michael S. Tsirkin <mst@redhat.com>
> ---
> drivers/crypto/virtio/virtio_crypto_akcipher_algs.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c b/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
> index 2621ff8a9376..de53eddf6796 100644
> --- a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
> +++ b/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
> @@ -104,7 +104,8 @@ static void virtio_crypto_dataq_akcipher_callback(struct virtio_crypto_request *
> }
>
> static int virtio_crypto_alg_akcipher_init_session(struct virtio_crypto_akcipher_ctx *ctx,
> - struct virtio_crypto_ctrl_header *header, void *para,
> + struct virtio_crypto_ctrl_header *header,
> + struct virtio_crypto_akcipher_session_para *para,
> const uint8_t *key, unsigned int keylen)
> {
> struct scatterlist outhdr_sg, key_sg, inhdr_sg, *sgs[3];
> @@ -128,7 +129,7 @@ static int virtio_crypto_alg_akcipher_init_session(struct virtio_crypto_akcipher
>
> ctrl = &vc_ctrl_req->ctrl;
> memcpy(&ctrl->header, header, sizeof(ctrl->header));
> - memcpy(&ctrl->u, para, sizeof(ctrl->u));
> + memcpy(&ctrl->u.akcipher_create_session.para, para, sizeof(*para));
> input = &vc_ctrl_req->input;
> input->status = cpu_to_le32(VIRTIO_CRYPTO_ERR);
>
> --
> 2.34.1
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH] crypto: virtio/akcipher - Fix stack overflow on memcpy
2024-01-30 11:27 [PATCH] crypto: virtio/akcipher - Fix stack overflow on memcpy zhenwei pi
2024-01-31 19:10 ` Nathan Chancellor
2024-01-31 22:36 ` Michael S. Tsirkin
@ 2024-02-01 5:49 ` Jason Wang
2024-02-09 5:00 ` Herbert Xu
3 siblings, 0 replies; 5+ messages in thread
From: Jason Wang @ 2024-02-01 5:49 UTC (permalink / raw)
To: zhenwei pi
Cc: arei.gonglei, mst, herbert, xuanzhuo, virtualization, nathan,
linux-crypto, linux-kernel, davem
On Tue, Jan 30, 2024 at 7:28 PM zhenwei pi <pizhenwei@bytedance.com> wrote:
>
> sizeof(struct virtio_crypto_akcipher_session_para) is less than
> sizeof(struct virtio_crypto_op_ctrl_req::u), copying more bytes from
> stack variable leads stack overflow. Clang reports this issue by
> commands:
> make -j CC=clang-14 mrproper >/dev/null 2>&1
> make -j O=/tmp/crypto-build CC=clang-14 allmodconfig >/dev/null 2>&1
> make -j O=/tmp/crypto-build W=1 CC=clang-14 drivers/crypto/virtio/
> virtio_crypto_akcipher_algs.o
>
> Fixes: 59ca6c93387d ("virtio-crypto: implement RSA algorithm")
> Link: https://lore.kernel.org/all/0a194a79-e3a3-45e7-be98-83abd3e1cb7e@roeck-us.net/
> Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Thanks
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH] crypto: virtio/akcipher - Fix stack overflow on memcpy
2024-01-30 11:27 [PATCH] crypto: virtio/akcipher - Fix stack overflow on memcpy zhenwei pi
` (2 preceding siblings ...)
2024-02-01 5:49 ` Jason Wang
@ 2024-02-09 5:00 ` Herbert Xu
3 siblings, 0 replies; 5+ messages in thread
From: Herbert Xu @ 2024-02-09 5:00 UTC (permalink / raw)
To: zhenwei pi
Cc: arei.gonglei, mst, jasowang, xuanzhuo, virtualization, nathan,
linux-crypto, linux-kernel, davem
On Tue, Jan 30, 2024 at 07:27:40PM +0800, zhenwei pi wrote:
> sizeof(struct virtio_crypto_akcipher_session_para) is less than
> sizeof(struct virtio_crypto_op_ctrl_req::u), copying more bytes from
> stack variable leads stack overflow. Clang reports this issue by
> commands:
> make -j CC=clang-14 mrproper >/dev/null 2>&1
> make -j O=/tmp/crypto-build CC=clang-14 allmodconfig >/dev/null 2>&1
> make -j O=/tmp/crypto-build W=1 CC=clang-14 drivers/crypto/virtio/
> virtio_crypto_akcipher_algs.o
>
> Fixes: 59ca6c93387d ("virtio-crypto: implement RSA algorithm")
> Link: https://lore.kernel.org/all/0a194a79-e3a3-45e7-be98-83abd3e1cb7e@roeck-us.net/
> Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
> ---
> drivers/crypto/virtio/virtio_crypto_akcipher_algs.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
Patch applied. Thanks.
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
^ permalink raw reply [flat|nested] 5+ messages in thread