Messages in this thread Patch in this message | | | From | Tom Rix <> | Subject | [PATCH] init/Kconfig: extend -Wno-array-bounds to gcc 13 | Date | Mon, 6 Mar 2023 17:09:47 -0500 |
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With gcc 13.0.1 on x86, there are several false positives like
drivers/net/ethernet/microchip/sparx5/sparx5_psfp.c:167:31: error: array subscript 4 is above array bounds of ‘const struct sparx5_psfp_gce[4]’ [-Werror=array-bounds=] 167 | gce = &sg->gce[i]; | ~~~~~~~^~~ In file included from drivers/net/ethernet/microchip/sparx5/sparx5_psfp.c:8: drivers/net/ethernet/microchip/sparx5/sparx5_main.h:506:32: note: while referencing ‘gce’ 506 | struct sparx5_psfp_gce gce[SPX5_PSFP_GCE_CNT]; | ^~~
The code lines for the reported problem /* For each scheduling entry */ for (i = 0; i < sg->num_entries; i++) { gce = &sg->gce[i];
i is bounded by num_entries, which is set in sparx5_tc_flower.c if (act->gate.num_entries >= SPX5_PSFP_GCE_CNT) { NL_SET_ERR_MSG_MOD(extack, "Invalid number of gate entries"); return -EINVAL; } .. sg->num_entries = act->gate.num_entries;
So disable array-bounds as was done on gcc 11 and 12
Signed-off-by: Tom Rix <trix@redhat.com> --- init/Kconfig | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/init/Kconfig b/init/Kconfig index 1fb5f313d18f..10d0a0020726 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -898,10 +898,14 @@ config GCC11_NO_ARRAY_BOUNDS config GCC12_NO_ARRAY_BOUNDS def_bool y +config GCC13_NO_ARRAY_BOUNDS + def_bool y + config CC_NO_ARRAY_BOUNDS bool default y if CC_IS_GCC && GCC_VERSION >= 110000 && GCC_VERSION < 120000 && GCC11_NO_ARRAY_BOUNDS default y if CC_IS_GCC && GCC_VERSION >= 120000 && GCC_VERSION < 130000 && GCC12_NO_ARRAY_BOUNDS + default y if CC_IS_GCC && GCC_VERSION >= 130000 && GCC_VERSION < 140000 && GCC13_NO_ARRAY_BOUNDS # # For architectures that know their GCC __int128 support is sound -- 2.27.0
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