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-rw-r--r--arch/arm64/Kconfig3
-rw-r--r--arch/arm64/include/asm/cache.h2
-rw-r--r--arch/arm64/include/asm/smp_plat.h1
-rw-r--r--arch/arm64/kernel/Makefile2
-rw-r--r--arch/arm64/kernel/cpufeature.c1
-rw-r--r--arch/arm64/kernel/entry-common.c2
-rw-r--r--arch/arm64/kernel/mte.c15
-rw-r--r--arch/arm64/lib/copy_from_user.S13
-rw-r--r--arch/arm64/lib/copy_in_user.S21
-rw-r--r--arch/arm64/lib/copy_to_user.S14
-rw-r--r--arch/arm64/lib/strlen.S10
11 files changed, 54 insertions, 30 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index e07e7de9ac49..b5b13a932561 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1605,7 +1605,8 @@ config ARM64_BTI_KERNEL
depends on CC_HAS_BRANCH_PROT_PAC_RET_BTI
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94697
depends on !CC_IS_GCC || GCC_VERSION >= 100100
- depends on !(CC_IS_CLANG && GCOV_KERNEL)
+ # https://github.com/llvm/llvm-project/commit/a88c722e687e6780dcd6a58718350dc76fcc4cc9
+ depends on !CC_IS_CLANG || CLANG_VERSION >= 120000
depends on (!FUNCTION_GRAPH_TRACER || DYNAMIC_FTRACE_WITH_REGS)
help
Build the kernel with Branch Target Identification annotations
diff --git a/arch/arm64/include/asm/cache.h b/arch/arm64/include/asm/cache.h
index a9c0716e7440..a074459f8f2f 100644
--- a/arch/arm64/include/asm/cache.h
+++ b/arch/arm64/include/asm/cache.h
@@ -47,7 +47,7 @@
* cache before the transfer is done, causing old data to be seen by
* the CPU.
*/
-#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
+#define ARCH_DMA_MINALIGN (128)
#ifdef CONFIG_KASAN_SW_TAGS
#define ARCH_SLAB_MINALIGN (1ULL << KASAN_SHADOW_SCALE_SHIFT)
diff --git a/arch/arm64/include/asm/smp_plat.h b/arch/arm64/include/asm/smp_plat.h
index 99ad77df8f52..97ddc6c203b7 100644
--- a/arch/arm64/include/asm/smp_plat.h
+++ b/arch/arm64/include/asm/smp_plat.h
@@ -10,6 +10,7 @@
#include <linux/cpumask.h>
+#include <asm/smp.h>
#include <asm/types.h>
struct mpidr_hash {
diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index cce308586fcc..3f1490bfb938 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -17,7 +17,7 @@ CFLAGS_syscall.o += -fno-stack-protector
# It's not safe to invoke KCOV when portions of the kernel environment aren't
# available or are out-of-sync with HW state. Since `noinstr` doesn't always
# inhibit KCOV instrumentation, disable it for the entire compilation unit.
-KCOV_INSTRUMENT_entry.o := n
+KCOV_INSTRUMENT_entry-common.o := n
KCOV_INSTRUMENT_idle.o := n
# Object file lists.
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 125d5c9471ac..0ead8bfedf20 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -81,6 +81,7 @@
#include <asm/mmu_context.h>
#include <asm/mte.h>
#include <asm/processor.h>
+#include <asm/smp.h>
#include <asm/sysreg.h>
#include <asm/traps.h>
#include <asm/virt.h>
diff --git a/arch/arm64/kernel/entry-common.c b/arch/arm64/kernel/entry-common.c
index 12ce14a98b7c..db8b2e2d02c2 100644
--- a/arch/arm64/kernel/entry-common.c
+++ b/arch/arm64/kernel/entry-common.c
@@ -604,7 +604,7 @@ asmlinkage void noinstr el0t_64_fiq_handler(struct pt_regs *regs)
__el0_fiq_handler_common(regs);
}
-static void __el0_error_handler_common(struct pt_regs *regs)
+static void noinstr __el0_error_handler_common(struct pt_regs *regs)
{
unsigned long esr = read_sysreg(esr_el1);
diff --git a/arch/arm64/kernel/mte.c b/arch/arm64/kernel/mte.c
index 69b3fde8759e..36f51b0e438a 100644
--- a/arch/arm64/kernel/mte.c
+++ b/arch/arm64/kernel/mte.c
@@ -193,18 +193,6 @@ void mte_check_tfsr_el1(void)
}
#endif
-static void update_gcr_el1_excl(u64 excl)
-{
-
- /*
- * Note that the mask controlled by the user via prctl() is an
- * include while GCR_EL1 accepts an exclude mask.
- * No need for ISB since this only affects EL0 currently, implicit
- * with ERET.
- */
- sysreg_clear_set_s(SYS_GCR_EL1, SYS_GCR_EL1_EXCL_MASK, excl);
-}
-
static void set_gcr_el1_excl(u64 excl)
{
current->thread.gcr_user_excl = excl;
@@ -265,7 +253,8 @@ void mte_suspend_exit(void)
if (!system_supports_mte())
return;
- update_gcr_el1_excl(gcr_kernel_excl);
+ sysreg_clear_set_s(SYS_GCR_EL1, SYS_GCR_EL1_EXCL_MASK, gcr_kernel_excl);
+ isb();
}
long set_mte_ctrl(struct task_struct *task, unsigned long arg)
diff --git a/arch/arm64/lib/copy_from_user.S b/arch/arm64/lib/copy_from_user.S
index 95cd62d67371..2cf999e41d30 100644
--- a/arch/arm64/lib/copy_from_user.S
+++ b/arch/arm64/lib/copy_from_user.S
@@ -29,7 +29,7 @@
.endm
.macro ldrh1 reg, ptr, val
- user_ldst 9998f, ldtrh, \reg, \ptr, \val
+ user_ldst 9997f, ldtrh, \reg, \ptr, \val
.endm
.macro strh1 reg, ptr, val
@@ -37,7 +37,7 @@
.endm
.macro ldr1 reg, ptr, val
- user_ldst 9998f, ldtr, \reg, \ptr, \val
+ user_ldst 9997f, ldtr, \reg, \ptr, \val
.endm
.macro str1 reg, ptr, val
@@ -45,7 +45,7 @@
.endm
.macro ldp1 reg1, reg2, ptr, val
- user_ldp 9998f, \reg1, \reg2, \ptr, \val
+ user_ldp 9997f, \reg1, \reg2, \ptr, \val
.endm
.macro stp1 reg1, reg2, ptr, val
@@ -53,8 +53,10 @@
.endm
end .req x5
+srcin .req x15
SYM_FUNC_START(__arch_copy_from_user)
add end, x0, x2
+ mov srcin, x1
#include "copy_template.S"
mov x0, #0 // Nothing to copy
ret
@@ -63,6 +65,11 @@ EXPORT_SYMBOL(__arch_copy_from_user)
.section .fixup,"ax"
.align 2
+9997: cmp dst, dstin
+ b.ne 9998f
+ // Before being absolutely sure we couldn't copy anything, try harder
+USER(9998f, ldtrb tmp1w, [srcin])
+ strb tmp1w, [dst], #1
9998: sub x0, end, dst // bytes not copied
ret
.previous
diff --git a/arch/arm64/lib/copy_in_user.S b/arch/arm64/lib/copy_in_user.S
index 1f61cd0df062..dbea3799c3ef 100644
--- a/arch/arm64/lib/copy_in_user.S
+++ b/arch/arm64/lib/copy_in_user.S
@@ -30,33 +30,34 @@
.endm
.macro ldrh1 reg, ptr, val
- user_ldst 9998f, ldtrh, \reg, \ptr, \val
+ user_ldst 9997f, ldtrh, \reg, \ptr, \val
.endm
.macro strh1 reg, ptr, val
- user_ldst 9998f, sttrh, \reg, \ptr, \val
+ user_ldst 9997f, sttrh, \reg, \ptr, \val
.endm
.macro ldr1 reg, ptr, val
- user_ldst 9998f, ldtr, \reg, \ptr, \val
+ user_ldst 9997f, ldtr, \reg, \ptr, \val
.endm
.macro str1 reg, ptr, val
- user_ldst 9998f, sttr, \reg, \ptr, \val
+ user_ldst 9997f, sttr, \reg, \ptr, \val
.endm
.macro ldp1 reg1, reg2, ptr, val
- user_ldp 9998f, \reg1, \reg2, \ptr, \val
+ user_ldp 9997f, \reg1, \reg2, \ptr, \val
.endm
.macro stp1 reg1, reg2, ptr, val
- user_stp 9998f, \reg1, \reg2, \ptr, \val
+ user_stp 9997f, \reg1, \reg2, \ptr, \val
.endm
end .req x5
-
+srcin .req x15
SYM_FUNC_START(__arch_copy_in_user)
add end, x0, x2
+ mov srcin, x1
#include "copy_template.S"
mov x0, #0
ret
@@ -65,6 +66,12 @@ EXPORT_SYMBOL(__arch_copy_in_user)
.section .fixup,"ax"
.align 2
+9997: cmp dst, dstin
+ b.ne 9998f
+ // Before being absolutely sure we couldn't copy anything, try harder
+USER(9998f, ldtrb tmp1w, [srcin])
+USER(9998f, sttrb tmp1w, [dst])
+ add dst, dst, #1
9998: sub x0, end, dst // bytes not copied
ret
.previous
diff --git a/arch/arm64/lib/copy_to_user.S b/arch/arm64/lib/copy_to_user.S
index 043da90f5dd7..9f380eecf653 100644
--- a/arch/arm64/lib/copy_to_user.S
+++ b/arch/arm64/lib/copy_to_user.S
@@ -32,7 +32,7 @@
.endm
.macro strh1 reg, ptr, val
- user_ldst 9998f, sttrh, \reg, \ptr, \val
+ user_ldst 9997f, sttrh, \reg, \ptr, \val
.endm
.macro ldr1 reg, ptr, val
@@ -40,7 +40,7 @@
.endm
.macro str1 reg, ptr, val
- user_ldst 9998f, sttr, \reg, \ptr, \val
+ user_ldst 9997f, sttr, \reg, \ptr, \val
.endm
.macro ldp1 reg1, reg2, ptr, val
@@ -48,12 +48,14 @@
.endm
.macro stp1 reg1, reg2, ptr, val
- user_stp 9998f, \reg1, \reg2, \ptr, \val
+ user_stp 9997f, \reg1, \reg2, \ptr, \val
.endm
end .req x5
+srcin .req x15
SYM_FUNC_START(__arch_copy_to_user)
add end, x0, x2
+ mov srcin, x1
#include "copy_template.S"
mov x0, #0
ret
@@ -62,6 +64,12 @@ EXPORT_SYMBOL(__arch_copy_to_user)
.section .fixup,"ax"
.align 2
+9997: cmp dst, dstin
+ b.ne 9998f
+ // Before being absolutely sure we couldn't copy anything, try harder
+ ldrb tmp1w, [srcin]
+USER(9998f, sttrb tmp1w, [dst])
+ add dst, dst, #1
9998: sub x0, end, dst // bytes not copied
ret
.previous
diff --git a/arch/arm64/lib/strlen.S b/arch/arm64/lib/strlen.S
index 35fbdb7d6e1a..1648790e91b3 100644
--- a/arch/arm64/lib/strlen.S
+++ b/arch/arm64/lib/strlen.S
@@ -8,6 +8,7 @@
#include <linux/linkage.h>
#include <asm/assembler.h>
+#include <asm/mte-def.h>
/* Assumptions:
*
@@ -42,7 +43,16 @@
#define REP8_7f 0x7f7f7f7f7f7f7f7f
#define REP8_80 0x8080808080808080
+/*
+ * When KASAN_HW_TAGS is in use, memory is checked at MTE_GRANULE_SIZE
+ * (16-byte) granularity, and we must ensure that no access straddles this
+ * alignment boundary.
+ */
+#ifdef CONFIG_KASAN_HW_TAGS
+#define MIN_PAGE_SIZE MTE_GRANULE_SIZE
+#else
#define MIN_PAGE_SIZE 4096
+#endif
/* Since strings are short on average, we check the first 16 bytes
of the string for a NUL character. In order to do an unaligned ldp
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