Hi Stanimir, On 5/17/21 06:01, Stanimir Varbanov wrote: > Hi, > > On 5/12/21 7:37 PM, Gustavo A. R. Silva wrote: >> >> >> On 5/12/21 06:39, Stanimir Varbanov wrote: >>> Hi, >>> >>> On 5/11/21 6:46 PM, Gustavo A. R. Silva wrote: >>>> Hi all, >>>> >>>> Friendly ping: >>>> >>>> We are about to be able to globally enable -Warray-bounds and, these are one of >>>> the last out-of-bounds warnings in linux-next. >>>> >>>> Could someone take this, please? >>> >>> This one introduces regressions, so I cannot take it. It needs some more >>> work. >> >> Please, share with me the errors or warnings you see with this. So, I can >> have an idea of what is going on. Unfortunately, I don't have access to the >> test suite or hardware to test this. > > I guess it needs more debugging, but the simple answer is that the > driver refuse to start streaming with this patch. This patch should fix the problems you are seeing: https://lore.kernel.org/linux-hardening/20210604004338.GA140710@embeddedor/ Could you please help me to test it? Thanks! -- Gustavo > >> >> Thanks! >> -- >> Gustavo >> >> >> >>>> >>>> Thanks >>>> -- >>>> Gustavo >>>> >>>> On 2/10/21 18:10, Gustavo A. R. Silva wrote: >>>>> There is a regular need in the kernel to provide a way to declare having >>>>> a dynamically sized set of trailing elements in a structure. Kernel code >>>>> should always use “flexible array members”[1] for these cases. The older >>>>> style of one-element or zero-length arrays should no longer be used[2]. >>>>> >>>>> Use flexible-array members in struct hfi_msg_sys_property_info_pkt and >>>>> hfi_msg_session_property_info_pkt instead of one-element arrays. >>>>> >>>>> Also, this helps with the ongoing efforts to enable -Warray-bounds by >>>>> fixing the following warnings: >>>>> >>>>> CC [M] drivers/media/platform/qcom/venus/hfi_msgs.o >>>>> drivers/media/platform/qcom/venus/hfi_msgs.c: In function ‘hfi_sys_property_info’: >>>>> drivers/media/platform/qcom/venus/hfi_msgs.c:246:35: warning: array subscript 1 is above array bounds of ‘u32[1]’ {aka ‘unsigned int[1]’} [-Warray-bounds] >>>>> 246 | if (req_bytes < 128 || !pkt->data[1] || pkt->num_properties > 1) >>>>> | ~~~~~~~~~^~~ >>>>> drivers/media/platform/qcom/venus/hfi_msgs.c: In function ‘hfi_session_prop_info’: >>>>> drivers/media/platform/qcom/venus/hfi_msgs.c:342:62: warning: array subscript 1 is above array bounds of ‘u32[1]’ {aka ‘unsigned int[1]’} [-Warray-bounds] >>>>> 342 | if (!req_bytes || req_bytes % sizeof(*buf_req) || !pkt->data[1]) >>>>> | ~~~~~~~~~^~~ >>>>> >>>>> [1] https://en.wikipedia.org/wiki/Flexible_array_member >>>>> [2] https://www.kernel.org/doc/html/v5.9/process/deprecated.html#zero-length-and-one-element-arrays >>>>> >>>>> Link: https://github.com/KSPP/linux/issues/79 >>>>> Link: https://github.com/KSPP/linux/issues/109 >>>>> Build-tested-by: <lkp@xxxxxxxxx> >>>>> Link: https://lore.kernel.org/lkml/6023dd80.MmTeFf8SzwX0iK7%2F%25lkp@xxxxxxxxx/ >>>>> Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx> >>>>> --- >>>>> drivers/media/platform/qcom/venus/hfi_msgs.h | 4 ++-- >>>>> 1 file changed, 2 insertions(+), 2 deletions(-) >>>>> >>>>> diff --git a/drivers/media/platform/qcom/venus/hfi_msgs.h b/drivers/media/platform/qcom/venus/hfi_msgs.h >>>>> index 526d9f5b487b..e2d2ccfbdd24 100644 >>>>> --- a/drivers/media/platform/qcom/venus/hfi_msgs.h >>>>> +++ b/drivers/media/platform/qcom/venus/hfi_msgs.h >>>>> @@ -113,7 +113,7 @@ struct hfi_msg_sys_ping_ack_pkt { >>>>> struct hfi_msg_sys_property_info_pkt { >>>>> struct hfi_pkt_hdr hdr; >>>>> u32 num_properties; >>>>> - u32 data[1]; >>>>> + u32 data[]; >>>>> }; >>>>> >>>>> struct hfi_msg_session_load_resources_done_pkt { >>>>> @@ -233,7 +233,7 @@ struct hfi_msg_session_parse_sequence_header_done_pkt { >>>>> struct hfi_msg_session_property_info_pkt { >>>>> struct hfi_session_hdr_pkt shdr; >>>>> u32 num_properties; >>>>> - u32 data[1]; >>>>> + u32 data[]; >>>>> }; >>>>> >>>>> struct hfi_msg_session_release_resources_done_pkt { >>>>> >>> >
