[openwrt/openwrt] kernel: Activate FORTIFY_SOURCE for MIPS kernel 5.4
LEDE Commits
lede-commits at lists.infradead.org
Fri Apr 30 23:37:51 BST 2021
hauke pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/9ffa2f8193a43b9044fcfd0e16b204e989b0d941
commit 9ffa2f8193a43b9044fcfd0e16b204e989b0d941
Author: Hauke Mehrtens <hauke at hauke-m.de>
AuthorDate: Sat Apr 3 20:02:54 2021 +0200
kernel: Activate FORTIFY_SOURCE for MIPS kernel 5.4
CONFIG_FORTIFY_SOURCE=y is already set in the generic kernel
configuration, but it is not working for MIPS on kernel 5.4, support for
MIPS was only added with kernel 5.5, other architectures like aarch64
support FORTIFY_SOURCE already since some time.
This patch adds support for FORTIFY_SOURCE to MIPS with kernel 5.4,
kernel 5.10 already supports this and needs no changes.
This backports one patch from kernel 5.5 and one fix from 5.8 to make
fortify source also work on our kernel 5.4.
The changes are not compatible with the
306-mips_mem_functions_performance.patch patch which was also removed
with kernel 5.10, probably because of the same problems. I think it is
not needed anyway as the compiler should automatically optimize the
calls to memset(), memcpy() and memmove() even when not explicitly
telling the compiler to use the build in variant.
This increases the size of an uncompressed kernel by less than 1 KB.
Acked-by: Rosen Penev <rosenp at gmail.com>
Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
.../linux/ath25/patches-5.4/107-ar5312_gpio.patch | 2 +-
.../0032-MIPS-ath79-sanitize-symbols.patch | 2 +-
.../322-MIPS-BCM63XX-switch-to-IRQ_DOMAIN.patch | 2 +-
...-mips-Kconfig-Add-ARCH_HAS_FORTIFY_SOURCE.patch | 32 ++++++
.../311-MIPS-Fix-exception-handler-memcpy.patch | 107 +++++++++++++++++++++
.../hack-5.4/301-mips_image_cmdline_hack.patch | 2 +-
...lect-CPU_MIPS64-for-remaining-MIPS64-CPUs.patch | 2 +-
.../pending-5.4/300-mips_expose_boot_raw.patch | 4 +-
.../306-mips_mem_functions_performance.patch | 106 --------------------
.../linux/lantiq/patches-5.4/0152-lantiq-VPE.patch | 2 +-
.../0122-mips-ralink-enable-zboot-support.patch | 2 +-
.../patches-5.4/105-mt7621-memory-detect.patch | 4 +-
12 files changed, 150 insertions(+), 117 deletions(-)
diff --git a/target/linux/ath25/patches-5.4/107-ar5312_gpio.patch b/target/linux/ath25/patches-5.4/107-ar5312_gpio.patch
index cd7b27d636..7b8c9650cc 100644
--- a/target/linux/ath25/patches-5.4/107-ar5312_gpio.patch
+++ b/target/linux/ath25/patches-5.4/107-ar5312_gpio.patch
@@ -202,7 +202,7 @@
+subsys_initcall(ar5312_gpio_init);
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -189,6 +189,7 @@ config ATH25
+@@ -190,6 +190,7 @@ config ATH25
select CEVT_R4K
select CSRC_R4K
select DMA_NONCOHERENT
diff --git a/target/linux/ath79/patches-5.4/0032-MIPS-ath79-sanitize-symbols.patch b/target/linux/ath79/patches-5.4/0032-MIPS-ath79-sanitize-symbols.patch
index 14dddd5147..9fa199a204 100644
--- a/target/linux/ath79/patches-5.4/0032-MIPS-ath79-sanitize-symbols.patch
+++ b/target/linux/ath79/patches-5.4/0032-MIPS-ath79-sanitize-symbols.patch
@@ -15,7 +15,7 @@ Signed-off-by: John Crispin <john at phrozen.org>
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -217,6 +217,8 @@ config ATH79
+@@ -218,6 +218,8 @@ config ATH79
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_MIPS16
select SYS_SUPPORTS_ZBOOT_UART_PROM
diff --git a/target/linux/bcm63xx/patches-5.4/322-MIPS-BCM63XX-switch-to-IRQ_DOMAIN.patch b/target/linux/bcm63xx/patches-5.4/322-MIPS-BCM63XX-switch-to-IRQ_DOMAIN.patch
index 8f50dd689b..eff4af025e 100644
--- a/target/linux/bcm63xx/patches-5.4/322-MIPS-BCM63XX-switch-to-IRQ_DOMAIN.patch
+++ b/target/linux/bcm63xx/patches-5.4/322-MIPS-BCM63XX-switch-to-IRQ_DOMAIN.patch
@@ -14,7 +14,7 @@ Signed-off-by: Jonas Gorski <jogo at openwrt.org>
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -291,6 +291,9 @@ config BCM63XX
+@@ -292,6 +292,9 @@ config BCM63XX
select SYNC_R4K
select DMA_NONCOHERENT
select IRQ_MIPS_CPU
diff --git a/target/linux/generic/backport-5.4/310-mips-Kconfig-Add-ARCH_HAS_FORTIFY_SOURCE.patch b/target/linux/generic/backport-5.4/310-mips-Kconfig-Add-ARCH_HAS_FORTIFY_SOURCE.patch
new file mode 100644
index 0000000000..e02f103543
--- /dev/null
+++ b/target/linux/generic/backport-5.4/310-mips-Kconfig-Add-ARCH_HAS_FORTIFY_SOURCE.patch
@@ -0,0 +1,32 @@
+From a8d2bb0559b5fefa5173ff4e7496cc6250db2c8a Mon Sep 17 00:00:00 2001
+From: Dmitry Korotin <dkorotin at wavecomp.com>
+Date: Thu, 12 Sep 2019 22:53:45 +0000
+Subject: [PATCH] mips: Kconfig: Add ARCH_HAS_FORTIFY_SOURCE
+
+FORTIFY_SOURCE detects various overflows at compile and run time.
+(6974f0c4555e ("include/linux/string.h:
+add the option of fortified string.h functions)
+
+ARCH_HAS_FORTIFY_SOURCE means that the architecture can be built and
+run with CONFIG_FORTIFY_SOURCE.
+
+Since mips can be built and run with that flag,
+select ARCH_HAS_FORTIFY_SOURCE as default.
+
+Signed-off-by: Dmitry Korotin <dkorotin at wavecomp.com>
+Signed-off-by: Paul Burton <paul.burton at mips.com>
+Cc: linux-mips at vger.kernel.org
+---
+ arch/mips/Kconfig | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/arch/mips/Kconfig
++++ b/arch/mips/Kconfig
+@@ -7,6 +7,7 @@ config MIPS
+ select ARCH_CLOCKSOURCE_DATA
+ select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
+ select ARCH_HAS_UBSAN_SANITIZE_ALL
++ select ARCH_HAS_FORTIFY_SOURCE
+ select ARCH_SUPPORTS_UPROBES
+ select ARCH_USE_BUILTIN_BSWAP
+ select ARCH_USE_CMPXCHG_LOCKREF if 64BIT
diff --git a/target/linux/generic/backport-5.4/311-MIPS-Fix-exception-handler-memcpy.patch b/target/linux/generic/backport-5.4/311-MIPS-Fix-exception-handler-memcpy.patch
new file mode 100644
index 0000000000..5a6725c7a0
--- /dev/null
+++ b/target/linux/generic/backport-5.4/311-MIPS-Fix-exception-handler-memcpy.patch
@@ -0,0 +1,107 @@
+From e01c91a360793298c9e1656a61faceff01487a43 Mon Sep 17 00:00:00 2001
+From: Ben Hutchings <ben at decadent.org.uk>
+Date: Sat, 23 May 2020 23:50:34 +0800
+Subject: [PATCH] MIPS: Fix exception handler memcpy()
+
+The exception handler subroutines are declared as a single char, but
+when copied to the required addresses the copy length is 0x80.
+
+When range checks are enabled for memcpy() this results in a build
+failure, with error messages such as:
+
+In file included from arch/mips/mti-malta/malta-init.c:15:
+In function 'memcpy',
+ inlined from 'mips_nmi_setup' at arch/mips/mti-malta/malta-init.c:98:2:
+include/linux/string.h:376:4: error: call to '__read_overflow2' declared with attribute error: detected read beyond size of object passed as 2nd parameter
+ 376 | __read_overflow2();
+ | ^~~~~~~~~~~~~~~~~~
+
+Change the declarations to use type char[].
+
+Signed-off-by: Ben Hutchings <ben at decadent.org.uk>
+Signed-off-by: YunQiang Su <syq at debian.org>
+Signed-off-by: Thomas Bogendoerfer <tsbogend at alpha.franken.de>
+---
+ arch/mips/loongson64/common/init.c | 4 ++--
+ arch/mips/mti-malta/malta-init.c | 8 ++++----
+ arch/mips/pistachio/init.c | 8 ++++----
+ 3 files changed, 10 insertions(+), 10 deletions(-)
+
+--- a/arch/mips/loongson64/common/init.c
++++ b/arch/mips/loongson64/common/init.c
+@@ -18,10 +18,10 @@ unsigned long __maybe_unused _loongson_a
+ static void __init mips_nmi_setup(void)
+ {
+ void *base;
+- extern char except_vec_nmi;
++ extern char except_vec_nmi[];
+
+ base = (void *)(CAC_BASE + 0x380);
+- memcpy(base, &except_vec_nmi, 0x80);
++ memcpy(base, except_vec_nmi, 0x80);
+ flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
+ }
+
+--- a/arch/mips/mti-malta/malta-init.c
++++ b/arch/mips/mti-malta/malta-init.c
+@@ -90,24 +90,24 @@ static void __init console_config(void)
+ static void __init mips_nmi_setup(void)
+ {
+ void *base;
+- extern char except_vec_nmi;
++ extern char except_vec_nmi[];
+
+ base = cpu_has_veic ?
+ (void *)(CAC_BASE + 0xa80) :
+ (void *)(CAC_BASE + 0x380);
+- memcpy(base, &except_vec_nmi, 0x80);
++ memcpy(base, except_vec_nmi, 0x80);
+ flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
+ }
+
+ static void __init mips_ejtag_setup(void)
+ {
+ void *base;
+- extern char except_vec_ejtag_debug;
++ extern char except_vec_ejtag_debug[];
+
+ base = cpu_has_veic ?
+ (void *)(CAC_BASE + 0xa00) :
+ (void *)(CAC_BASE + 0x300);
+- memcpy(base, &except_vec_ejtag_debug, 0x80);
++ memcpy(base, except_vec_ejtag_debug, 0x80);
+ flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
+ }
+
+--- a/arch/mips/pistachio/init.c
++++ b/arch/mips/pistachio/init.c
+@@ -83,12 +83,12 @@ phys_addr_t mips_cdmm_phys_base(void)
+ static void __init mips_nmi_setup(void)
+ {
+ void *base;
+- extern char except_vec_nmi;
++ extern char except_vec_nmi[];
+
+ base = cpu_has_veic ?
+ (void *)(CAC_BASE + 0xa80) :
+ (void *)(CAC_BASE + 0x380);
+- memcpy(base, &except_vec_nmi, 0x80);
++ memcpy(base, except_vec_nmi, 0x80);
+ flush_icache_range((unsigned long)base,
+ (unsigned long)base + 0x80);
+ }
+@@ -96,12 +96,12 @@ static void __init mips_nmi_setup(void)
+ static void __init mips_ejtag_setup(void)
+ {
+ void *base;
+- extern char except_vec_ejtag_debug;
++ extern char except_vec_ejtag_debug[];
+
+ base = cpu_has_veic ?
+ (void *)(CAC_BASE + 0xa00) :
+ (void *)(CAC_BASE + 0x300);
+- memcpy(base, &except_vec_ejtag_debug, 0x80);
++ memcpy(base, except_vec_ejtag_debug, 0x80);
+ flush_icache_range((unsigned long)base,
+ (unsigned long)base + 0x80);
+ }
diff --git a/target/linux/generic/hack-5.4/301-mips_image_cmdline_hack.patch b/target/linux/generic/hack-5.4/301-mips_image_cmdline_hack.patch
index da0aa34250..ada65cd2a0 100644
--- a/target/linux/generic/hack-5.4/301-mips_image_cmdline_hack.patch
+++ b/target/linux/generic/hack-5.4/301-mips_image_cmdline_hack.patch
@@ -10,7 +10,7 @@ Signed-off-by: Gabor Juhos <juhosg at openwrt.org>
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -1158,6 +1158,10 @@ config SYNC_R4K
+@@ -1159,6 +1159,10 @@ config SYNC_R4K
config MIPS_MACHINE
def_bool n
diff --git a/target/linux/generic/pending-5.4/103-MIPS-select-CPU_MIPS64-for-remaining-MIPS64-CPUs.patch b/target/linux/generic/pending-5.4/103-MIPS-select-CPU_MIPS64-for-remaining-MIPS64-CPUs.patch
index 3b04316692..4e7a532156 100644
--- a/target/linux/generic/pending-5.4/103-MIPS-select-CPU_MIPS64-for-remaining-MIPS64-CPUs.patch
+++ b/target/linux/generic/pending-5.4/103-MIPS-select-CPU_MIPS64-for-remaining-MIPS64-CPUs.patch
@@ -25,7 +25,7 @@ Signed-off-by: Jason A. Donenfeld <Jason at zx2c4.com>
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -2036,7 +2036,8 @@ config CPU_MIPS32
+@@ -2037,7 +2037,8 @@ config CPU_MIPS32
config CPU_MIPS64
bool
diff --git a/target/linux/generic/pending-5.4/300-mips_expose_boot_raw.patch b/target/linux/generic/pending-5.4/300-mips_expose_boot_raw.patch
index 476ae501d6..7b9ae65c60 100644
--- a/target/linux/generic/pending-5.4/300-mips_expose_boot_raw.patch
+++ b/target/linux/generic/pending-5.4/300-mips_expose_boot_raw.patch
@@ -9,7 +9,7 @@ Acked-by: Rob Landley <rob at landley.net>
---
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -1068,9 +1068,6 @@ config FW_ARC
+@@ -1069,9 +1069,6 @@ config FW_ARC
config ARCH_MAY_HAVE_PC_FDC
bool
@@ -19,7 +19,7 @@ Acked-by: Rob Landley <rob at landley.net>
config CEVT_BCM1480
bool
-@@ -3043,6 +3040,18 @@ choice
+@@ -3044,6 +3041,18 @@ choice
bool "Extend builtin kernel arguments with bootloader arguments"
endchoice
diff --git a/target/linux/generic/pending-5.4/306-mips_mem_functions_performance.patch b/target/linux/generic/pending-5.4/306-mips_mem_functions_performance.patch
deleted file mode 100644
index 611aa0314f..0000000000
--- a/target/linux/generic/pending-5.4/306-mips_mem_functions_performance.patch
+++ /dev/null
@@ -1,106 +0,0 @@
-From: Felix Fietkau <nbd at nbd.name>
-Subject: [PATCH] mips: allow the compiler to optimize memset, memcmp, memcpy for better performance and (in some instances) smaller code
-
-lede-commit: 07e59c7bc7f375f792ec9734be42fe4fa391a8bb
-Signed-off-by: Felix Fietkau <nbd at nbd.name>
----
- arch/mips/boot/compressed/Makefile | 3 ++-
- arch/mips/include/asm/string.h | 38 ++++++++++++++++++++++++++++++++++++++
- arch/mips/lib/Makefile | 2 +-
- arch/mips/lib/memcmp.c | 22 ++++++++++++++++++++++
- 4 files changed, 63 insertions(+), 2 deletions(-)
- create mode 100644 arch/mips/lib/memcmp.c
-
---- a/arch/mips/boot/compressed/Makefile
-+++ b/arch/mips/boot/compressed/Makefile
-@@ -23,7 +23,8 @@ KBUILD_CFLAGS := $(filter-out -pg, $(KBU
- KBUILD_CFLAGS := $(filter-out -fstack-protector, $(KBUILD_CFLAGS))
-
- KBUILD_CFLAGS := $(KBUILD_CFLAGS) -D__KERNEL__ \
-- -DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) -D"VMLINUX_LOAD_ADDRESS_ULL=$(VMLINUX_LOAD_ADDRESS)ull"
-+ -DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) -D"VMLINUX_LOAD_ADDRESS_ULL=$(VMLINUX_LOAD_ADDRESS)ull" \
-+ -D__ZBOOT__
-
- KBUILD_AFLAGS := $(KBUILD_AFLAGS) -D__ASSEMBLY__ \
- -DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) \
---- a/arch/mips/include/asm/string.h
-+++ b/arch/mips/include/asm/string.h
-@@ -19,4 +19,42 @@ extern void *memcpy(void *__to, __const_
- #define __HAVE_ARCH_MEMMOVE
- extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
-
-+#ifndef __ZBOOT__
-+#define memset(__s, __c, len) \
-+({ \
-+ size_t __len = (len); \
-+ void *__ret; \
-+ if (__builtin_constant_p(len) && __len >= 64) \
-+ __ret = memset((__s), (__c), __len); \
-+ else \
-+ __ret = __builtin_memset((__s), (__c), __len); \
-+ __ret; \
-+})
-+
-+#define memcpy(dst, src, len) \
-+({ \
-+ size_t __len = (len); \
-+ void *__ret; \
-+ if (__builtin_constant_p(len) && __len >= 64) \
-+ __ret = memcpy((dst), (src), __len); \
-+ else \
-+ __ret = __builtin_memcpy((dst), (src), __len); \
-+ __ret; \
-+})
-+
-+#define memmove(dst, src, len) \
-+({ \
-+ size_t __len = (len); \
-+ void *__ret; \
-+ if (__builtin_constant_p(len) && __len >= 64) \
-+ __ret = memmove((dst), (src), __len); \
-+ else \
-+ __ret = __builtin_memmove((dst), (src), __len); \
-+ __ret; \
-+})
-+
-+#define __HAVE_ARCH_MEMCMP
-+#define memcmp(src1, src2, len) __builtin_memcmp((src1), (src2), (len))
-+#endif
-+
- #endif /* _ASM_STRING_H */
---- a/arch/mips/lib/Makefile
-+++ b/arch/mips/lib/Makefile
-@@ -5,7 +5,7 @@
-
- lib-y += bitops.o csum_partial.o delay.o memcpy.o memset.o \
- mips-atomic.o strncpy_user.o \
-- strnlen_user.o uncached.o
-+ strnlen_user.o uncached.o memcmp.o
-
- obj-y += iomap_copy.o
- obj-$(CONFIG_PCI) += iomap-pci.o
---- /dev/null
-+++ b/arch/mips/lib/memcmp.c
-@@ -0,0 +1,22 @@
-+/*
-+ * copied from linux/lib/string.c
-+ *
-+ * Copyright (C) 1991, 1992 Linus Torvalds
-+ */
-+
-+#include <linux/module.h>
-+#include <linux/string.h>
-+
-+#undef memcmp
-+int memcmp(const void *cs, const void *ct, size_t count)
-+{
-+ const unsigned char *su1, *su2;
-+ int res = 0;
-+
-+ for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
-+ if ((res = *su1 - *su2) != 0)
-+ break;
-+ return res;
-+}
-+EXPORT_SYMBOL(memcmp);
-+
diff --git a/target/linux/lantiq/patches-5.4/0152-lantiq-VPE.patch b/target/linux/lantiq/patches-5.4/0152-lantiq-VPE.patch
index f8c2343e19..2aff479024 100644
--- a/target/linux/lantiq/patches-5.4/0152-lantiq-VPE.patch
+++ b/target/linux/lantiq/patches-5.4/0152-lantiq-VPE.patch
@@ -1,6 +1,6 @@
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -2378,6 +2378,12 @@ config MIPS_VPE_LOADER
+@@ -2379,6 +2379,12 @@ config MIPS_VPE_LOADER
Includes a loader for loading an elf relocatable object
onto another VPE and running it.
diff --git a/target/linux/ramips/patches-5.4/0122-mips-ralink-enable-zboot-support.patch b/target/linux/ramips/patches-5.4/0122-mips-ralink-enable-zboot-support.patch
index 76615ed491..34617898c8 100644
--- a/target/linux/ramips/patches-5.4/0122-mips-ralink-enable-zboot-support.patch
+++ b/target/linux/ramips/patches-5.4/0122-mips-ralink-enable-zboot-support.patch
@@ -16,7 +16,7 @@ Signed-off-by: Thomas Bogendoerfer <tsbogend at alpha.franken.de>
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
-@@ -625,6 +625,7 @@ config RALINK
+@@ -626,6 +626,7 @@ config RALINK
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_LITTLE_ENDIAN
select SYS_SUPPORTS_MIPS16
diff --git a/target/linux/ramips/patches-5.4/105-mt7621-memory-detect.patch b/target/linux/ramips/patches-5.4/105-mt7621-memory-detect.patch
index 08b4b0de29..277d2aa43c 100644
--- a/target/linux/ramips/patches-5.4/105-mt7621-memory-detect.patch
+++ b/target/linux/ramips/patches-5.4/105-mt7621-memory-detect.patch
@@ -71,13 +71,13 @@ Signed-off-by: Chuanhong Guo <gch981213 at gmail.com>
+ phys_addr_t size;
+
+ for (size = 32 * SZ_1M; size < 256 * SZ_1M; size <<= 1) {
-+ if (!memcmp(dm, dm + size, sizeof(detect_magic)))
++ if (!__builtin_memcmp(dm, dm + size, sizeof(detect_magic)))
+ break;
+ }
+
+ if ((size == 256 * SZ_1M) &&
+ (CPHYSADDR(dm + size) < MT7621_LOWMEM_MAX_SIZE) &&
-+ memcmp(dm, dm + size, sizeof(detect_magic))) {
++ __builtin_memcmp(dm, dm + size, sizeof(detect_magic))) {
+ add_memory_region(MT7621_LOWMEM_BASE, MT7621_LOWMEM_MAX_SIZE,
+ BOOT_MEM_RAM);
+ add_memory_region(MT7621_HIGHMEM_BASE, MT7621_HIGHMEM_SIZE,
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