| Message ID | e4b13d7b79d1477e775c6d4564f7b23c4cf967f2.1684278538.git.gustavoars@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | media: venus: hfi_cmds: Replace one-element array with flexible-array member | expand |
On Tue, May 16, 2023 at 05:14:27PM -0600, Gustavo A. R. Silva wrote: > One-element arrays are deprecated, and we are replacing them with flexible > array members instead. So, replace one-element arrays with flexible-array > members in struct hfi_session_set_buffers_pkt, and refactor the rest of > the code, accordingly. > > This helps with the ongoing efforts to tighten the FORTIFY_SOURCE > routines on memcpy() and help us make progress towards globally > enabling -fstrict-flex-arrays=3 [1]. > > This results in no differences in binary output. > > Link: https://github.com/KSPP/linux/issues/79 > Link: https://github.com/KSPP/linux/issues/292 > Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1] > Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Reviewed-by: Kees Cook <keescook@chromium.org>
On 5/17/2023 4:44 AM, Gustavo A. R. Silva wrote: > One-element arrays are deprecated, and we are replacing them with flexible > array members instead. So, replace one-element arrays with flexible-array > members in struct hfi_session_set_buffers_pkt, and refactor the rest of > the code, accordingly. > > This helps with the ongoing efforts to tighten the FORTIFY_SOURCE > routines on memcpy() and help us make progress towards globally > enabling -fstrict-flex-arrays=3 [1]. > > This results in no differences in binary output. > > Link: https://github.com/KSPP/linux/issues/79 > Link: https://github.com/KSPP/linux/issues/292 > Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1] > Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> The patch looks good. As stated in previous patch, lets combine this into a single series. > --- > drivers/media/platform/qcom/venus/hfi_cmds.c | 12 ++++++------ > drivers/media/platform/qcom/venus/hfi_cmds.h | 2 +- > 2 files changed, 7 insertions(+), 7 deletions(-) > > diff --git a/drivers/media/platform/qcom/venus/hfi_cmds.c b/drivers/media/platform/qcom/venus/hfi_cmds.c > index bc3f8ff05840..21d1b3c90dc0 100644 > --- a/drivers/media/platform/qcom/venus/hfi_cmds.c > +++ b/drivers/media/platform/qcom/venus/hfi_cmds.c > @@ -200,8 +200,8 @@ int pkt_session_set_buffers(struct hfi_session_set_buffers_pkt *pkt, > struct hfi_buffer_info *bi; > > pkt->extradata_size = bd->extradata_size; > - pkt->shdr.hdr.size = sizeof(*pkt) - sizeof(u32) + > - (bd->num_buffers * sizeof(*bi)); > + pkt->shdr.hdr.size = sizeof(*pkt) + > + bd->num_buffers * sizeof(*bi); > bi = (struct hfi_buffer_info *)pkt->buffer_info; > for (i = 0; i < pkt->num_buffers; i++) { > bi->buffer_addr = bd->device_addr; > @@ -210,7 +210,7 @@ int pkt_session_set_buffers(struct hfi_session_set_buffers_pkt *pkt, > } else { > pkt->extradata_size = 0; > pkt->shdr.hdr.size = sizeof(*pkt) + > - ((bd->num_buffers - 1) * sizeof(u32)); > + bd->num_buffers * sizeof(u32); > for (i = 0; i < pkt->num_buffers; i++) > pkt->buffer_info[i] = bd->device_addr; > } > @@ -243,8 +243,8 @@ int pkt_session_unset_buffers(struct hfi_session_release_buffer_pkt *pkt, > bi->extradata_addr = bd->extradata_addr; > } > pkt->shdr.hdr.size = > - sizeof(struct hfi_session_set_buffers_pkt) - > - sizeof(u32) + (bd->num_buffers * sizeof(*bi)); > + sizeof(struct hfi_session_set_buffers_pkt) + > + bd->num_buffers * sizeof(*bi); > } else { > for (i = 0; i < pkt->num_buffers; i++) > pkt->buffer_info[i] = bd->device_addr; > @@ -252,7 +252,7 @@ int pkt_session_unset_buffers(struct hfi_session_release_buffer_pkt *pkt, > pkt->extradata_size = 0; > pkt->shdr.hdr.size = > sizeof(struct hfi_session_set_buffers_pkt) + > - ((bd->num_buffers - 1) * sizeof(u32)); > + bd->num_buffers * sizeof(u32); > } > > pkt->response_req = bd->response_required; > diff --git a/drivers/media/platform/qcom/venus/hfi_cmds.h b/drivers/media/platform/qcom/venus/hfi_cmds.h > index 99bc0b6db67c..ba74d03eb9cd 100644 > --- a/drivers/media/platform/qcom/venus/hfi_cmds.h > +++ b/drivers/media/platform/qcom/venus/hfi_cmds.h > @@ -117,7 +117,7 @@ struct hfi_session_set_buffers_pkt { > u32 extradata_size; > u32 min_buffer_size; > u32 num_buffers; > - u32 buffer_info[1]; > + u32 buffer_info[]; > }; > > struct hfi_session_get_sequence_header_pkt {
diff --git a/drivers/media/platform/qcom/venus/hfi_cmds.c b/drivers/media/platform/qcom/venus/hfi_cmds.c index bc3f8ff05840..21d1b3c90dc0 100644 --- a/drivers/media/platform/qcom/venus/hfi_cmds.c +++ b/drivers/media/platform/qcom/venus/hfi_cmds.c @@ -200,8 +200,8 @@ int pkt_session_set_buffers(struct hfi_session_set_buffers_pkt *pkt, struct hfi_buffer_info *bi; pkt->extradata_size = bd->extradata_size; - pkt->shdr.hdr.size = sizeof(*pkt) - sizeof(u32) + - (bd->num_buffers * sizeof(*bi)); + pkt->shdr.hdr.size = sizeof(*pkt) + + bd->num_buffers * sizeof(*bi); bi = (struct hfi_buffer_info *)pkt->buffer_info; for (i = 0; i < pkt->num_buffers; i++) { bi->buffer_addr = bd->device_addr; @@ -210,7 +210,7 @@ int pkt_session_set_buffers(struct hfi_session_set_buffers_pkt *pkt, } else { pkt->extradata_size = 0; pkt->shdr.hdr.size = sizeof(*pkt) + - ((bd->num_buffers - 1) * sizeof(u32)); + bd->num_buffers * sizeof(u32); for (i = 0; i < pkt->num_buffers; i++) pkt->buffer_info[i] = bd->device_addr; } @@ -243,8 +243,8 @@ int pkt_session_unset_buffers(struct hfi_session_release_buffer_pkt *pkt, bi->extradata_addr = bd->extradata_addr; } pkt->shdr.hdr.size = - sizeof(struct hfi_session_set_buffers_pkt) - - sizeof(u32) + (bd->num_buffers * sizeof(*bi)); + sizeof(struct hfi_session_set_buffers_pkt) + + bd->num_buffers * sizeof(*bi); } else { for (i = 0; i < pkt->num_buffers; i++) pkt->buffer_info[i] = bd->device_addr; @@ -252,7 +252,7 @@ int pkt_session_unset_buffers(struct hfi_session_release_buffer_pkt *pkt, pkt->extradata_size = 0; pkt->shdr.hdr.size = sizeof(struct hfi_session_set_buffers_pkt) + - ((bd->num_buffers - 1) * sizeof(u32)); + bd->num_buffers * sizeof(u32); } pkt->response_req = bd->response_required; diff --git a/drivers/media/platform/qcom/venus/hfi_cmds.h b/drivers/media/platform/qcom/venus/hfi_cmds.h index 99bc0b6db67c..ba74d03eb9cd 100644 --- a/drivers/media/platform/qcom/venus/hfi_cmds.h +++ b/drivers/media/platform/qcom/venus/hfi_cmds.h @@ -117,7 +117,7 @@ struct hfi_session_set_buffers_pkt { u32 extradata_size; u32 min_buffer_size; u32 num_buffers; - u32 buffer_info[1]; + u32 buffer_info[]; }; struct hfi_session_get_sequence_header_pkt {
One-element arrays are deprecated, and we are replacing them with flexible array members instead. So, replace one-element arrays with flexible-array members in struct hfi_session_set_buffers_pkt, and refactor the rest of the code, accordingly. This helps with the ongoing efforts to tighten the FORTIFY_SOURCE routines on memcpy() and help us make progress towards globally enabling -fstrict-flex-arrays=3 [1]. This results in no differences in binary output. Link: https://github.com/KSPP/linux/issues/79 Link: https://github.com/KSPP/linux/issues/292 Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1] Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> --- drivers/media/platform/qcom/venus/hfi_cmds.c | 12 ++++++------ drivers/media/platform/qcom/venus/hfi_cmds.h | 2 +- 2 files changed, 7 insertions(+), 7 deletions(-)