https://bugs.dpdk.org/show_bug.cgi?id=743
Bug ID: 743
Summary: Building DPDK with gcc 11.1.1 Generates Multiple
Warning Messages in the i40e PMD
Product: DPDK
Version: unspecified
Hardware: POWER
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: ethdev
Assignee: dev@dpdk.org
Reporter: d...@linux.vnet.ibm.com
Target Milestone: ---
Using Fedora 34 container on ppc64le host with gcc 11. Running the same test
in a Fedora 34 VM on x86 does not produce an error.
[root@ee54008db177 dpdk]# gcc --version
gcc (GCC) 11.1.1 20210531 (Red Hat 11.1.1-3)
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Warning errors generated when building the i40e PMD, even after proposed fixes
for bug 739 are applied.
[root@ee54008db177 dpdk]# ninja -C build
ninja: Entering directory `build'
[1270/2422] Compiling C object
drivers/libtmp_rte_net_i40e.a.p/net_i40e_i40e_flow.c.o
In function 'i40e_flow_parse_fdir_pattern',
inlined from 'i40e_flow_parse_fdir_filter' at
../drivers/net/i40e/i40e_flow.c:3274:8:
../drivers/net/i40e/i40e_flow.c:3052:69: warning: writing 1 byte into a region
of size 0 [-Wstringop-overflow=]
3052 | filter->input.flow_ext.flexbytes[j] =
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
3053 | raw_spec->pattern[i];
| ~~~~~~~~~~~~~~~~~~~~
In file included from ../drivers/net/i40e/i40e_flow.c:25:
../drivers/net/i40e/i40e_flow.c: In function 'i40e_flow_parse_fdir_filter':
../drivers/net/i40e/i40e_ethdev.h:628:17: note: at offset 16 into destination
object 'flexbytes' of size 16
628 | uint8_t flexbytes[RTE_ETH_FDIR_MAX_FLEXLEN];
| ^~~~~~~~~
In function 'i40e_flow_parse_fdir_pattern',
inlined from 'i40e_flow_parse_fdir_filter' at
../drivers/net/i40e/i40e_flow.c:3274:8:
../drivers/net/i40e/i40e_flow.c:3054:69: warning: writing 1 byte into a region
of size 0 [-Wstringop-overflow=]
3054 | filter->input.flow_ext.flex_mask[j] =
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
3055 | raw_mask->pattern[i];
| ~~~~~~~~~~~~~~~~~~~~
In file included from ../drivers/net/i40e/i40e_flow.c:25:
../drivers/net/i40e/i40e_flow.c: In function 'i40e_flow_parse_fdir_filter':
../drivers/net/i40e/i40e_ethdev.h:630:17: note: at offset 16 into destination
object 'flex_mask' of size 16
630 | uint8_t flex_mask[I40E_FDIR_MAX_FLEX_LEN];
| ^~~~~~~~~
In function 'i40e_flow_parse_fdir_pattern',
inlined from 'i40e_flow_parse_fdir_filter' at
../drivers/net/i40e/i40e_flow.c:3274:8:
../drivers/net/i40e/i40e_flow.c:3052:69: warning: writing 1 byte into a region
of size 0 [-Wstringop-overflow=]
3052 | filter->input.flow_ext.flexbytes[j] =
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
3053 | raw_spec->pattern[i];
| ~~~~~~~~~~~~~~~~~~~~
In file included from ../drivers/net/i40e/i40e_flow.c:25:
../drivers/net/i40e/i40e_flow.c: In function 'i40e_flow_parse_fdir_filter':
../drivers/net/i40e/i40e_ethdev.h:628:17: note: at offset [17, 271] into
destination object 'flexbytes' of size 16
628 | uint8_t flexbytes[RTE_ETH_FDIR_MAX_FLEXLEN];
| ^~~~~~~~~
In function 'i40e_flow_parse_fdir_pattern',
inlined from 'i40e_flow_parse_fdir_filter' at
../drivers/net/i40e/i40e_flow.c:3274:8:
../drivers/net/i40e/i40e_flow.c:3054:69: warning: writing 1 byte into a region
of size 0 [-Wstringop-overflow=]
3054 | filter->input.flow_ext.flex_mask[j] =
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
3055 | raw_mask->pattern[i];
| ~~~~~~~~~~~~~~~~~~~~
In file included from ../drivers/net/i40e/i40e_flow.c:25:
../drivers/net/i40e/i40e_flow.c: In function 'i40e_flow_parse_fdir_filter':
../drivers/net/i40e/i40e_ethdev.h:630:17: note: at offset [17, 271] into
destination object 'flex_mask' of size 16
630 | uint8_t flex_mask[I40E_FDIR_MAX_FLEX_LEN];
| ^~~~~~~~~
[2422/2422] Linking target app/test/dpdk-test
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