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-rw-r--r--arch/riscv/kernel/ftrace.c3
-rw-r--r--arch/riscv/kernel/kgdb.c8
-rw-r--r--arch/riscv/kernel/patch.c4
-rw-r--r--arch/riscv/kernel/sys_riscv.c6
-rw-r--r--arch/riscv/kernel/traps.c4
5 files changed, 16 insertions, 9 deletions
diff --git a/arch/riscv/kernel/ftrace.c b/arch/riscv/kernel/ftrace.c
index 08396614d6f4..2ff63d0cbb50 100644
--- a/arch/riscv/kernel/ftrace.c
+++ b/arch/riscv/kernel/ftrace.c
@@ -38,7 +38,8 @@ static int ftrace_check_current_call(unsigned long hook_pos,
* Read the text we want to modify;
* return must be -EFAULT on read error
*/
- if (probe_kernel_read(replaced, (void *)hook_pos, MCOUNT_INSN_SIZE))
+ if (copy_from_kernel_nofault(replaced, (void *)hook_pos,
+ MCOUNT_INSN_SIZE))
return -EFAULT;
/*
diff --git a/arch/riscv/kernel/kgdb.c b/arch/riscv/kernel/kgdb.c
index f16ade84a11f..c3275f42d1ac 100644
--- a/arch/riscv/kernel/kgdb.c
+++ b/arch/riscv/kernel/kgdb.c
@@ -62,7 +62,7 @@ int get_step_address(struct pt_regs *regs, unsigned long *next_addr)
unsigned int rs1_num, rs2_num;
int op_code;
- if (probe_kernel_address((void *)pc, op_code))
+ if (get_kernel_nofault(op_code, (void *)pc))
return -EINVAL;
if ((op_code & __INSN_LENGTH_MASK) != __INSN_LENGTH_GE_32) {
if (is_c_jalr_insn(op_code) || is_c_jr_insn(op_code)) {
@@ -146,14 +146,14 @@ int do_single_step(struct pt_regs *regs)
return error;
/* Store the op code in the stepped address */
- error = probe_kernel_address((void *)addr, stepped_opcode);
+ error = get_kernel_nofault(stepped_opcode, (void *)addr);
if (error)
return error;
stepped_address = addr;
/* Replace the op code with the break instruction */
- error = probe_kernel_write((void *)stepped_address,
+ error = copy_to_kernel_nofault((void *)stepped_address,
arch_kgdb_ops.gdb_bpt_instr,
BREAK_INSTR_SIZE);
/* Flush and return */
@@ -173,7 +173,7 @@ int do_single_step(struct pt_regs *regs)
static void undo_single_step(struct pt_regs *regs)
{
if (stepped_opcode != 0) {
- probe_kernel_write((void *)stepped_address,
+ copy_to_kernel_nofault((void *)stepped_address,
(void *)&stepped_opcode, BREAK_INSTR_SIZE);
flush_icache_range(stepped_address,
stepped_address + BREAK_INSTR_SIZE);
diff --git a/arch/riscv/kernel/patch.c b/arch/riscv/kernel/patch.c
index d4a64dfed342..3fe7a5296aa5 100644
--- a/arch/riscv/kernel/patch.c
+++ b/arch/riscv/kernel/patch.c
@@ -63,7 +63,7 @@ static int patch_insn_write(void *addr, const void *insn, size_t len)
waddr = patch_map(addr, FIX_TEXT_POKE0);
- ret = probe_kernel_write(waddr, insn, len);
+ ret = copy_to_kernel_nofault(waddr, insn, len);
patch_unmap(FIX_TEXT_POKE0);
@@ -76,7 +76,7 @@ NOKPROBE_SYMBOL(patch_insn_write);
#else
static int patch_insn_write(void *addr, const void *insn, size_t len)
{
- return probe_kernel_write(addr, insn, len);
+ return copy_to_kernel_nofault(addr, insn, len);
}
NOKPROBE_SYMBOL(patch_insn_write);
#endif /* CONFIG_MMU */
diff --git a/arch/riscv/kernel/sys_riscv.c b/arch/riscv/kernel/sys_riscv.c
index f3619f59d85c..12f8a7fce78b 100644
--- a/arch/riscv/kernel/sys_riscv.c
+++ b/arch/riscv/kernel/sys_riscv.c
@@ -8,6 +8,7 @@
#include <linux/syscalls.h>
#include <asm/unistd.h>
#include <asm/cacheflush.h>
+#include <asm-generic/mman-common.h>
static long riscv_sys_mmap(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
@@ -16,6 +17,11 @@ static long riscv_sys_mmap(unsigned long addr, unsigned long len,
{
if (unlikely(offset & (~PAGE_MASK >> page_shift_offset)))
return -EINVAL;
+
+ if ((prot & PROT_WRITE) && (prot & PROT_EXEC))
+ if (unlikely(!(prot & PROT_READ)))
+ return -EINVAL;
+
return ksys_mmap_pgoff(addr, len, prot, flags, fd,
offset >> (PAGE_SHIFT - page_shift_offset));
}
diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c
index ecec1778e3a4..7d95cce5e47c 100644
--- a/arch/riscv/kernel/traps.c
+++ b/arch/riscv/kernel/traps.c
@@ -137,7 +137,7 @@ static inline unsigned long get_break_insn_length(unsigned long pc)
{
bug_insn_t insn;
- if (probe_kernel_address((bug_insn_t *)pc, insn))
+ if (get_kernel_nofault(insn, (bug_insn_t *)pc))
return 0;
return GET_INSN_LENGTH(insn);
@@ -165,7 +165,7 @@ int is_valid_bugaddr(unsigned long pc)
if (pc < VMALLOC_START)
return 0;
- if (probe_kernel_address((bug_insn_t *)pc, insn))
+ if (get_kernel_nofault(insn, (bug_insn_t *)pc))
return 0;
if ((insn & __INSN_LENGTH_MASK) == __INSN_LENGTH_32)
return (insn == __BUG_INSN_32);