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Date: Tue, 24 Mar 2020 18:56:43 +0000
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Subject: [dpdk-dev] [Bug 421] gcc 10.0.1 stringops-overflow warnings
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https://bugs.dpdk.org/show_bug.cgi?id=3D421
Bug ID: 421
Summary: gcc 10.0.1 stringops-overflow warnings
Product: DPDK
Version: 20.05
Hardware: All
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: core
Assignee: dev@dpdk.org
Reporter: kevuzaj@gmail.com
Target Milestone: ---
Created attachment 85
--> https://bugs.dpdk.org/attachment.cgi?id=3D85&action=3Dedit
Log of gcc 10.0.1 stringop-overflow warnings
As well as the ones reported for crypto in Bug 394 there are many other
stringop-overflow warnings with gcc 10.0.1 which is the default with Fedora=
32.
This is caused by the following documented change since GCC:
https://gcc.gnu.org/gcc-10/changes.html
Enhancements to existing warnings:=20
-Wstringop-overflow detects more out-of-bounds stores to member arrays
including zero-length arrays, dynamically allocated objects and variable le=
ngth
arrays, as well as more instances of reads of unterminated character arrays=
by
string built-in functions. The warning also detects out-of-bounds accesses =
by
calls to user-defined functions declared with the new attribute access.=20
The following files trigger have these warnings. Full log of warnings attac=
hed.
../drivers/crypto/caam_jr/caam_jr_pvt.h
../drivers/crypto/ccp/ccp_crypto.h
../drivers/crypto/dpaa_sec/dpaa_sec.h
../drivers/crypto/virtio/virtio_cryptodev.h
../drivers/net/enic/base/vnic_dev.c
../drivers/net/iavf/../../common/iavf/virtchnl.h
../drivers/net/ice/base/ice_adminq_cmd.h
../drivers/net/mlx4/mlx4_rxtx.c
../drivers/net/qede/base/ecore_mcp.c
../lib/librte_cryptodev/rte_cryptodev.h
../lib/librte_pipeline/rte_table_action.c
Some of these are easy to spot as false positives because of dynamic memory
allocation. Others seem to be too but would need component maintainers to
confirm. Can add individual Bugs per component if needed.
Proposed solution is to add -Wno-stringop-overflow flag at top level.
--=20
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