4.19-stable review patch. If anyone has any objections, please let me know.
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From: Arnd Bergmann arnd@arndb.de
[ Upstream commit a3403d304708f60565582d60af4316289d0316a0 ]
gcc -Wstringop-truncation warns about copying a string that results in a missing nul termination:
drivers/acpi/acpica/tbfind.c: In function 'acpi_tb_find_table': drivers/acpi/acpica/tbfind.c:60:9: error: 'strncpy' specified bound 6 equals destination size [-Werror=stringop-truncation] 60 | strncpy(header.oem_id, oem_id, ACPI_OEM_ID_SIZE); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/acpi/acpica/tbfind.c:61:9: error: 'strncpy' specified bound 8 equals destination size [-Werror=stringop-truncation] 61 | strncpy(header.oem_table_id, oem_table_id, ACPI_OEM_TABLE_ID_SIZE); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The code works as intended, and the warning could be addressed by using a memcpy(), but turning the warning off for this file works equally well and may be easier to merge.
Fixes: 47c08729bf1c ("ACPICA: Fix for LoadTable operator, input strings") Link: https://lore.kernel.org/lkml/CAJZ5v0hoUfv54KW7y4223Mn9E7D4xvR7whRFNLTBqCZMUx... Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/acpi/acpica/Makefile | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/acpi/acpica/Makefile b/drivers/acpi/acpica/Makefile index 8ce51f0f40ce5..dec40cb81cc42 100644 --- a/drivers/acpi/acpica/Makefile +++ b/drivers/acpi/acpica/Makefile @@ -5,6 +5,7 @@
ccflags-y := -D_LINUX -DBUILDING_ACPICA ccflags-$(CONFIG_ACPI_DEBUG) += -DACPI_DEBUG_OUTPUT +CFLAGS_tbfind.o += $(call cc-disable-warning, stringop-truncation)
# use acpi.o to put all files here into acpi.o modparam namespace obj-y += acpi.o