maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault

Better describe what these functions do.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/arm/kernel/ftrace.c b/arch/arm/kernel/ftrace.c
index 10499d4..9a79ef6 100644 (file)
--- a/arch/arm/kernel/ftrace.c
+++ b/arch/arm/kernel/ftrace.c
@@ -84,7 +84,8 @@ static int ftrace_modify_code(unsigned long pc, unsigned long old,
                old = __opcode_to_mem_arm(old);
 
        if (validate) {
-               if (probe_kernel_read(&replaced, (void *)pc, MCOUNT_INSN_SIZE))
+               if (copy_from_kernel_nofault(&replaced, (void *)pc,
+                               MCOUNT_INSN_SIZE))
                        return -EFAULT;
 
                if (replaced != old)

diff --git a/arch/arm/kernel/kgdb.c b/arch/arm/kernel/kgdb.c
index 6a95b92..7bd30c0 100644 (file)
--- a/arch/arm/kernel/kgdb.c
+++ b/arch/arm/kernel/kgdb.c
@@ -236,7 +236,7 @@ int kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt)
        /* patch_text() only supports int-sized breakpoints */
        BUILD_BUG_ON(sizeof(int) != BREAK_INSTR_SIZE);
 
-       err = probe_kernel_read(bpt->saved_instr, (char *)bpt->bpt_addr,
+       err = copy_from_kernel_nofault(bpt->saved_instr, (char *)bpt->bpt_addr,
                                BREAK_INSTR_SIZE);
        if (err)
                return err;

diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c
index 684d871..a107375 100644 (file)
--- a/arch/arm64/kernel/insn.c
+++ b/arch/arm64/kernel/insn.c
@@ -135,7 +135,7 @@ int __kprobes aarch64_insn_read(void *addr, u32 *insnp)
        int ret;
        __le32 val;
 
-       ret = probe_kernel_read(&val, addr, AARCH64_INSN_SIZE);
+       ret = copy_from_kernel_nofault(&val, addr, AARCH64_INSN_SIZE);
        if (!ret)
                *insnp = le32_to_cpu(val);
 
@@ -151,7 +151,7 @@ static int __kprobes __aarch64_insn_write(void *addr, __le32 insn)
        raw_spin_lock_irqsave(&patch_lock, flags);
        waddr = patch_map(addr, FIX_TEXT_POKE0);
 
-       ret = probe_kernel_write(waddr, &insn, AARCH64_INSN_SIZE);
+       ret = copy_to_kernel_nofault(waddr, &insn, AARCH64_INSN_SIZE);
 
        patch_unmap(FIX_TEXT_POKE0);
        raw_spin_unlock_irqrestore(&patch_lock, flags);

diff --git a/arch/csky/kernel/ftrace.c b/arch/csky/kernel/ftrace.c
index 3c425b8..b4a7ec1 100644 (file)
--- a/arch/csky/kernel/ftrace.c
+++ b/arch/csky/kernel/ftrace.c
@@ -72,7 +72,8 @@ static int ftrace_check_current_nop(unsigned long hook)
        uint16_t olds[7];
        unsigned long hook_pos = hook - 2;
 
-       if (probe_kernel_read((void *)olds, (void *)hook_pos, sizeof(nops)))
+       if (copy_from_kernel_nofault((void *)olds, (void *)hook_pos,
+                       sizeof(nops)))
                return -EFAULT;
 
        if (memcmp((void *)nops, (void *)olds, sizeof(nops))) {
@@ -97,7 +98,7 @@ static int ftrace_modify_code(unsigned long hook, unsigned long target,
 
        make_jbsr(target, hook, call, nolr);
 
-       ret = probe_kernel_write((void *)hook_pos, enable ? call : nops,
+       ret = copy_to_kernel_nofault((void *)hook_pos, enable ? call : nops,
                                 sizeof(nops));
        if (ret)
                return -EPERM;

diff --git a/arch/ia64/kernel/ftrace.c b/arch/ia64/kernel/ftrace.c
index cee411e..b2ab2d5 100644 (file)
--- a/arch/ia64/kernel/ftrace.c
+++ b/arch/ia64/kernel/ftrace.c
@@ -108,7 +108,7 @@ ftrace_modify_code(unsigned long ip, unsigned char *old_code,
                goto skip_check;
 
        /* read the text we want to modify */
-       if (probe_kernel_read(replaced, (void *)ip, MCOUNT_INSN_SIZE))
+       if (copy_from_kernel_nofault(replaced, (void *)ip, MCOUNT_INSN_SIZE))
                return -EFAULT;
 
        /* Make sure it is what we expect it to be */
@@ -117,7 +117,7 @@ ftrace_modify_code(unsigned long ip, unsigned char *old_code,
 
 skip_check:
        /* replace the text with the new text */
-       if (probe_kernel_write(((void *)ip), new_code, MCOUNT_INSN_SIZE))
+       if (copy_to_kernel_nofault(((void *)ip), new_code, MCOUNT_INSN_SIZE))
                return -EPERM;
        flush_icache_range(ip, ip + MCOUNT_INSN_SIZE);
 
@@ -129,7 +129,7 @@ static int ftrace_make_nop_check(struct dyn_ftrace *rec, unsigned long addr)
        unsigned char __attribute__((aligned(8))) replaced[MCOUNT_INSN_SIZE];
        unsigned long ip = rec->ip;
 
-       if (probe_kernel_read(replaced, (void *)ip, MCOUNT_INSN_SIZE))
+       if (copy_from_kernel_nofault(replaced, (void *)ip, MCOUNT_INSN_SIZE))
                return -EFAULT;
        if (rec->flags & FTRACE_FL_CONVERTED) {
                struct ftrace_call_insn *call_insn, *tmp_call;

diff --git a/arch/mips/kernel/kprobes.c b/arch/mips/kernel/kprobes.c
index 6cfae24..d043c2f 100644 (file)
--- a/arch/mips/kernel/kprobes.c
+++ b/arch/mips/kernel/kprobes.c
@@ -86,9 +86,9 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
                goto out;
        }
 
-       if ((probe_kernel_read(&prev_insn, p->addr - 1,
-                               sizeof(mips_instruction)) == 0) &&
-                               insn_has_delayslot(prev_insn)) {
+       if (copy_from_kernel_nofault(&prev_insn, p->addr - 1,
+                       sizeof(mips_instruction)) == 0 &&
+           insn_has_delayslot(prev_insn)) {
                pr_notice("Kprobes for branch delayslot are not supported\n");
                ret = -EINVAL;
                goto out;

diff --git a/arch/nds32/kernel/ftrace.c b/arch/nds32/kernel/ftrace.c
index 22ab77e..3763b3f 100644 (file)
--- a/arch/nds32/kernel/ftrace.c
+++ b/arch/nds32/kernel/ftrace.c
@@ -131,13 +131,14 @@ static int __ftrace_modify_code(unsigned long pc, unsigned long *old_insn,
        unsigned long orig_insn[3];
 
        if (validate) {
-               if (probe_kernel_read(orig_insn, (void *)pc, MCOUNT_INSN_SIZE))
+               if (copy_from_kernel_nofault(orig_insn, (void *)pc,
+                               MCOUNT_INSN_SIZE))
                        return -EFAULT;
                if (memcmp(orig_insn, old_insn, MCOUNT_INSN_SIZE))
                        return -EINVAL;
        }
 
-       if (probe_kernel_write((void *)pc, new_insn, MCOUNT_INSN_SIZE))
+       if (copy_to_kernel_nofault((void *)pc, new_insn, MCOUNT_INSN_SIZE))
                return -EPERM;
 
        return 0;

diff --git a/arch/parisc/kernel/ftrace.c b/arch/parisc/kernel/ftrace.c
index b836fc6..1df0f67 100644 (file)
--- a/arch/parisc/kernel/ftrace.c
+++ b/arch/parisc/kernel/ftrace.c
@@ -172,7 +172,7 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
 
        ip = (void *)(rec->ip + 4 - size);
 
-       ret = probe_kernel_read(insn, ip, size);
+       ret = copy_from_kernel_nofault(insn, ip, size);
        if (ret)
                return ret;
 

diff --git a/arch/parisc/kernel/kgdb.c b/arch/parisc/kernel/kgdb.c
index 664278d..c4554ac 100644 (file)
--- a/arch/parisc/kernel/kgdb.c
+++ b/arch/parisc/kernel/kgdb.c
@@ -154,8 +154,8 @@ void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long ip)
 
 int kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt)
 {
-       int ret = probe_kernel_read(bpt->saved_instr, (char *)bpt->bpt_addr,
-                               BREAK_INSTR_SIZE);
+       int ret = copy_from_kernel_nofault(bpt->saved_instr,
+                       (char *)bpt->bpt_addr, BREAK_INSTR_SIZE);
        if (ret)
                return ret;
 

diff --git a/arch/parisc/lib/memcpy.c b/arch/parisc/lib/memcpy.c
index 94a9fe2..4b75388 100644 (file)
--- a/arch/parisc/lib/memcpy.c
+++ b/arch/parisc/lib/memcpy.c
@@ -57,7 +57,7 @@ void * memcpy(void * dst,const void *src, size_t count)
 EXPORT_SYMBOL(raw_copy_in_user);
 EXPORT_SYMBOL(memcpy);
 
-bool probe_kernel_read_allowed(const void *unsafe_src, size_t size)
+bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size)
 {
        if ((unsigned long)unsafe_src < PAGE_SIZE)
                return false;

diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c
index f4c2fa1..ae2b188 100644 (file)
--- a/arch/powerpc/kernel/module_64.c
+++ b/arch/powerpc/kernel/module_64.c
@@ -756,7 +756,8 @@ int module_trampoline_target(struct module *mod, unsigned long addr,
 
        stub = (struct ppc64_stub_entry *)addr;
 
-       if (probe_kernel_read(&magic, &stub->magic, sizeof(magic))) {
+       if (copy_from_kernel_nofault(&magic, &stub->magic,
+                       sizeof(magic))) {
                pr_err("%s: fault reading magic for stub %lx for %s\n", __func__, addr, mod->name);
                return -EFAULT;
        }
@@ -766,7 +767,8 @@ int module_trampoline_target(struct module *mod, unsigned long addr,
                return -EFAULT;
        }
 
-       if (probe_kernel_read(&funcdata, &stub->funcdata, sizeof(funcdata))) {
+       if (copy_from_kernel_nofault(&funcdata, &stub->funcdata,
+                       sizeof(funcdata))) {
                pr_err("%s: fault reading funcdata for stub %lx for %s\n", __func__, addr, mod->name);
                 return -EFAULT;
        }

diff --git a/arch/powerpc/kernel/trace/ftrace.c b/arch/powerpc/kernel/trace/ftrace.c
index 5e39962..c1fede6 100644 (file)
--- a/arch/powerpc/kernel/trace/ftrace.c
+++ b/arch/powerpc/kernel/trace/ftrace.c
@@ -226,7 +226,7 @@ __ftrace_make_nop(struct module *mod,
        unsigned long ip = rec->ip;
        unsigned long tramp;
 
-       if (probe_kernel_read(&op, (void *)ip, MCOUNT_INSN_SIZE))
+       if (copy_from_kernel_nofault(&op, (void *)ip, MCOUNT_INSN_SIZE))
                return -EFAULT;
 
        /* Make sure that that this is still a 24bit jump */
@@ -249,7 +249,7 @@ __ftrace_make_nop(struct module *mod,
        pr_devel("ip:%lx jumps to %lx", ip, tramp);
 
        /* Find where the trampoline jumps to */
-       if (probe_kernel_read(jmp, (void *)tramp, sizeof(jmp))) {
+       if (copy_from_kernel_nofault(jmp, (void *)tramp, sizeof(jmp))) {
                pr_err("Failed to read %lx\n", tramp);
                return -EFAULT;
        }

diff --git a/arch/powerpc/lib/inst.c b/arch/powerpc/lib/inst.c
index aedfd6e..6c7a20a 100644 (file)
--- a/arch/powerpc/lib/inst.c
+++ b/arch/powerpc/lib/inst.c
@@ -33,11 +33,11 @@ int probe_kernel_read_inst(struct ppc_inst *inst,
        unsigned int val, suffix;
        int err;
 
-       err = probe_kernel_read(&val, src, sizeof(val));
+       err = copy_from_kernel_nofault(&val, src, sizeof(val));
        if (err)
                return err;
        if (get_op(val) == OP_PREFIX) {
-               err = probe_kernel_read(&suffix, (void *)src + 4, 4);
+               err = copy_from_kernel_nofault(&suffix, (void *)src + 4, 4);
                *inst = ppc_inst_prefix(val, suffix);
        } else {
                *inst = ppc_inst(val);
@@ -64,7 +64,7 @@ int probe_kernel_read_inst(struct ppc_inst *inst,
        unsigned int val;
        int err;
 
-       err = probe_kernel_read(&val, src, sizeof(val));
+       err = copy_from_kernel_nofault(&val, src, sizeof(val));
        if (!err)
                *inst = ppc_inst(val);
 

diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index 13b9dd5..efe97ff 100644 (file)
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -418,7 +418,8 @@ static __u64 power_pmu_bhrb_to(u64 addr)
        __u64 target;
 
        if (is_kernel_addr(addr)) {
-               if (probe_kernel_read(&instr, (void *)addr, sizeof(instr)))
+               if (copy_from_kernel_nofault(&instr, (void *)addr,
+                               sizeof(instr)))
                        return 0;
 
                return branch_target((struct ppc_inst *)&instr);

diff --git a/arch/riscv/kernel/ftrace.c b/arch/riscv/kernel/ftrace.c
index 0839661..2ff63d0 100644 (file)
--- 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 f16ade8..a21fb21 100644 (file)
--- a/arch/riscv/kernel/kgdb.c
+++ b/arch/riscv/kernel/kgdb.c
@@ -153,7 +153,7 @@ int do_single_step(struct pt_regs *regs)
        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 d4a64df..3fe7a52 100644 (file)
--- 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/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
index 44e01dd..b388e87 100644 (file)
--- a/arch/s390/kernel/ftrace.c
+++ b/arch/s390/kernel/ftrace.c
@@ -83,7 +83,7 @@ int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec,
 {
        struct ftrace_insn orig, new, old;
 
-       if (probe_kernel_read(&old, (void *) rec->ip, sizeof(old)))
+       if (copy_from_kernel_nofault(&old, (void *) rec->ip, sizeof(old)))
                return -EFAULT;
        if (addr == MCOUNT_ADDR) {
                /* Initial code replacement */
@@ -105,7 +105,7 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
 {
        struct ftrace_insn orig, new, old;
 
-       if (probe_kernel_read(&old, (void *) rec->ip, sizeof(old)))
+       if (copy_from_kernel_nofault(&old, (void *) rec->ip, sizeof(old)))
                return -EFAULT;
        /* Replace nop with an ftrace call. */
        ftrace_generate_nop_insn(&orig);

diff --git a/arch/sh/kernel/ftrace.c b/arch/sh/kernel/ftrace.c
index 1b04270..0646c59 100644 (file)
--- a/arch/sh/kernel/ftrace.c
+++ b/arch/sh/kernel/ftrace.c
@@ -119,7 +119,7 @@ static void ftrace_mod_code(void)
         * But if one were to fail, then they all should, and if one were
         * to succeed, then they all should.
         */
-       mod_code_status = probe_kernel_write(mod_code_ip, mod_code_newcode,
+       mod_code_status = copy_to_kernel_nofault(mod_code_ip, mod_code_newcode,
                                             MCOUNT_INSN_SIZE);
 
        /* if we fail, then kill any new writers */
@@ -203,7 +203,7 @@ static int ftrace_modify_code(unsigned long ip, unsigned char *old_code,
         */
 
        /* read the text we want to modify */
-       if (probe_kernel_read(replaced, (void *)ip, MCOUNT_INSN_SIZE))
+       if (copy_from_kernel_nofault(replaced, (void *)ip, MCOUNT_INSN_SIZE))
                return -EFAULT;
 
        /* Make sure it is what we expect it to be */
@@ -268,7 +268,7 @@ static int ftrace_mod(unsigned long ip, unsigned long old_addr,
 {
        unsigned char code[MCOUNT_INSN_SIZE];
 
-       if (probe_kernel_read(code, (void *)ip, MCOUNT_INSN_SIZE))
+       if (copy_from_kernel_nofault(code, (void *)ip, MCOUNT_INSN_SIZE))
                return -EFAULT;
 
        if (old_addr != __raw_readl((unsigned long *)code))

diff --git a/arch/um/kernel/maccess.c b/arch/um/kernel/maccess.c
index e929c09..8ccd568 100644 (file)
--- a/arch/um/kernel/maccess.c
+++ b/arch/um/kernel/maccess.c
@@ -7,7 +7,7 @@
 #include <linux/kernel.h>
 #include <os.h>
 
-bool probe_kernel_read_allowed(const void *src, size_t size)
+bool copy_from_kernel_nofault_allowed(const void *src, size_t size)
 {
        void *psrc = (void *)rounddown((unsigned long)src, PAGE_SIZE);
 

diff --git a/arch/x86/include/asm/ptrace.h b/arch/x86/include/asm/ptrace.h
index ebedeab..255b2dd 100644 (file)
--- a/arch/x86/include/asm/ptrace.h
+++ b/arch/x86/include/asm/ptrace.h
@@ -278,7 +278,7 @@ static inline unsigned long *regs_get_kernel_stack_nth_addr(struct pt_regs *regs
 }
 
 /* To avoid include hell, we can't include uaccess.h */
-extern long probe_kernel_read(void *dst, const void *src, size_t size);
+extern long copy_from_kernel_nofault(void *dst, const void *src, size_t size);
 
 /**
  * regs_get_kernel_stack_nth() - get Nth entry of the stack
@@ -298,7 +298,7 @@ static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
 
        addr = regs_get_kernel_stack_nth_addr(regs, n);
        if (addr) {
-               ret = probe_kernel_read(&val, addr, sizeof(val));
+               ret = copy_from_kernel_nofault(&val, addr, sizeof(val));
                if (!ret)
                        return val;
        }

diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 456511b..b037cfa 100644 (file)
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -106,7 +106,7 @@ void show_opcodes(struct pt_regs *regs, const char *loglvl)
        bad_ip = user_mode(regs) &&
                __chk_range_not_ok(prologue, OPCODE_BUFSIZE, TASK_SIZE_MAX);
 
-       if (bad_ip || probe_kernel_read(opcodes, (u8 *)prologue,
+       if (bad_ip || copy_from_kernel_nofault(opcodes, (u8 *)prologue,
                                        OPCODE_BUFSIZE)) {
                printk("%sCode: Bad RIP value.\n", loglvl);
        } else {

diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index c84d28e..5150456 100644 (file)
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -86,7 +86,7 @@ static int ftrace_verify_code(unsigned long ip, const char *old_code)
         * sure what we read is what we expected it to be before modifying it.
         */
        /* read the text we want to modify */
-       if (probe_kernel_read(cur_code, (void *)ip, MCOUNT_INSN_SIZE)) {
+       if (copy_from_kernel_nofault(cur_code, (void *)ip, MCOUNT_INSN_SIZE)) {
                WARN_ON(1);
                return -EFAULT;
        }
@@ -355,7 +355,7 @@ create_trampoline(struct ftrace_ops *ops, unsigned int *tramp_size)
        npages = DIV_ROUND_UP(*tramp_size, PAGE_SIZE);
 
        /* Copy ftrace_caller onto the trampoline memory */
-       ret = probe_kernel_read(trampoline, (void *)start_offset, size);
+       ret = copy_from_kernel_nofault(trampoline, (void *)start_offset, size);
        if (WARN_ON(ret < 0))
                goto fail;
 
@@ -363,13 +363,13 @@ create_trampoline(struct ftrace_ops *ops, unsigned int *tramp_size)
 
        /* The trampoline ends with ret(q) */
        retq = (unsigned long)ftrace_stub;
-       ret = probe_kernel_read(ip, (void *)retq, RET_SIZE);
+       ret = copy_from_kernel_nofault(ip, (void *)retq, RET_SIZE);
        if (WARN_ON(ret < 0))
                goto fail;
 
        if (ops->flags & FTRACE_OPS_FL_SAVE_REGS) {
                ip = trampoline + (ftrace_regs_caller_ret - ftrace_regs_caller);
-               ret = probe_kernel_read(ip, (void *)retq, RET_SIZE);
+               ret = copy_from_kernel_nofault(ip, (void *)retq, RET_SIZE);
                if (WARN_ON(ret < 0))
                        goto fail;
        }
@@ -506,7 +506,7 @@ static void *addr_from_call(void *ptr)
        union text_poke_insn call;
        int ret;
 
-       ret = probe_kernel_read(&call, ptr, CALL_INSN_SIZE);
+       ret = copy_from_kernel_nofault(&call, ptr, CALL_INSN_SIZE);
        if (WARN_ON_ONCE(ret < 0))
                return NULL;
 

diff --git a/arch/x86/kernel/kgdb.c b/arch/x86/kernel/kgdb.c
index c44fe7d..68acd30 100644 (file)
--- a/arch/x86/kernel/kgdb.c
+++ b/arch/x86/kernel/kgdb.c
@@ -732,11 +732,11 @@ int kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt)
        int err;
 
        bpt->type = BP_BREAKPOINT;
-       err = probe_kernel_read(bpt->saved_instr, (char *)bpt->bpt_addr,
+       err = copy_from_kernel_nofault(bpt->saved_instr, (char *)bpt->bpt_addr,
                                BREAK_INSTR_SIZE);
        if (err)
                return err;
-       err = probe_kernel_write((char *)bpt->bpt_addr,
+       err = copy_to_kernel_nofault((char *)bpt->bpt_addr,
                                 arch_kgdb_ops.gdb_bpt_instr, BREAK_INSTR_SIZE);
        if (!err)
                return err;
@@ -768,7 +768,7 @@ int kgdb_arch_remove_breakpoint(struct kgdb_bkpt *bpt)
        return 0;
 
 knl_write:
-       return probe_kernel_write((char *)bpt->bpt_addr,
+       return copy_to_kernel_nofault((char *)bpt->bpt_addr,
                                  (char *)bpt->saved_instr, BREAK_INSTR_SIZE);
 }
 

diff --git a/arch/x86/kernel/kprobes/core.c b/arch/x86/kernel/kprobes/core.c
index 3bafe1b..f09985c 100644 (file)
--- a/arch/x86/kernel/kprobes/core.c
+++ b/arch/x86/kernel/kprobes/core.c
@@ -243,7 +243,7 @@ __recover_probed_insn(kprobe_opcode_t *buf, unsigned long addr)
         * Fortunately, we know that the original code is the ideal 5-byte
         * long NOP.
         */
-       if (probe_kernel_read(buf, (void *)addr,
+       if (copy_from_kernel_nofault(buf, (void *)addr,
                MAX_INSN_SIZE * sizeof(kprobe_opcode_t)))
                return 0UL;
 
@@ -346,7 +346,8 @@ int __copy_instruction(u8 *dest, u8 *src, u8 *real, struct insn *insn)
                return 0;
 
        /* This can access kernel text if given address is not recovered */
-       if (probe_kernel_read(dest, (void *)recovered_insn, MAX_INSN_SIZE))
+       if (copy_from_kernel_nofault(dest, (void *)recovered_insn,
+                       MAX_INSN_SIZE))
                return 0;
 
        kernel_insn_init(insn, dest, MAX_INSN_SIZE);

diff --git a/arch/x86/kernel/kprobes/opt.c b/arch/x86/kernel/kprobes/opt.c
index 321c199..7af4c61 100644 (file)
--- a/arch/x86/kernel/kprobes/opt.c
+++ b/arch/x86/kernel/kprobes/opt.c
@@ -56,7 +56,7 @@ found:
         * overwritten by jump destination address. In this case, original
         * bytes must be recovered from op->optinsn.copied_insn buffer.
         */
-       if (probe_kernel_read(buf, (void *)addr,
+       if (copy_from_kernel_nofault(buf, (void *)addr,
                MAX_INSN_SIZE * sizeof(kprobe_opcode_t)))
                return 0UL;
 

diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index af75109..7003f2e 100644 (file)
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -488,7 +488,8 @@ static enum kernel_gp_hint get_kernel_gp_address(struct pt_regs *regs,
        u8 insn_buf[MAX_INSN_SIZE];
        struct insn insn;
 
-       if (probe_kernel_read(insn_buf, (void *)regs->ip, MAX_INSN_SIZE))
+       if (copy_from_kernel_nofault(insn_buf, (void *)regs->ip,
+                       MAX_INSN_SIZE))
                return GP_NO_HINT;
 
        kernel_insn_init(&insn, insn_buf, MAX_INSN_SIZE);

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 66be9bd..e996aa3 100644 (file)
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -442,7 +442,7 @@ static void show_ldttss(const struct desc_ptr *gdt, const char *name, u16 index)
                return;
        }
 
-       if (probe_kernel_read(&desc, (void *)(gdt->address + offset),
+       if (copy_from_kernel_nofault(&desc, (void *)(gdt->address + offset),
                              sizeof(struct ldttss_desc))) {
                pr_alert("%s: 0x%hx -- GDT entry is not readable\n",
                         name, index);

diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index bda909e..8b4afad 100644 (file)
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -737,7 +737,7 @@ static void __init test_wp_bit(void)
 
        __set_fixmap(FIX_WP_TEST, __pa_symbol(empty_zero_page), PAGE_KERNEL_RO);
 
-       if (probe_kernel_write((char *)fix_to_virt(FIX_WP_TEST), &z, 1)) {
+       if (copy_to_kernel_nofault((char *)fix_to_virt(FIX_WP_TEST), &z, 1)) {
                clear_fixmap(FIX_WP_TEST);
                printk(KERN_CONT "Ok.\n");
                return;

diff --git a/arch/x86/mm/maccess.c b/arch/x86/mm/maccess.c
index e1d7d74..92ec176 100644 (file)
--- a/arch/x86/mm/maccess.c
+++ b/arch/x86/mm/maccess.c
@@ -9,7 +9,7 @@ static __always_inline u64 canonical_address(u64 vaddr, u8 vaddr_bits)
        return ((s64)vaddr << (64 - vaddr_bits)) >> (64 - vaddr_bits);
 }
 
-bool probe_kernel_read_allowed(const void *unsafe_src, size_t size)
+bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size)
 {
        unsigned long vaddr = (unsigned long)unsafe_src;
 
@@ -22,7 +22,7 @@ bool probe_kernel_read_allowed(const void *unsafe_src, size_t size)
               canonical_address(vaddr, boot_cpu_data.x86_virt_bits) == vaddr;
 }
 #else
-bool probe_kernel_read_allowed(const void *unsafe_src, size_t size)
+bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size)
 {
        return (unsigned long)unsafe_src >= TASK_SIZE_MAX;
 }

diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index 33b309d..acc49fa 100644 (file)
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -386,7 +386,7 @@ static void set_aliased_prot(void *v, pgprot_t prot)
 
        preempt_disable();
 
-       probe_kernel_read(&dummy, v, 1);
+       copy_from_kernel_nofault(&dummy, v, 1);
 
        if (HYPERVISOR_update_va_mapping((unsigned long)v, pte, 0))
                BUG();

diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 31cae88..934c92d 100644 (file)
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -171,7 +171,7 @@ static ssize_t read_mem(struct file *file, char __user *buf,
                        if (!ptr)
                                goto failed;
 
-                       probe = probe_kernel_read(bounce, ptr, sz);
+                       probe = copy_from_kernel_nofault(bounce, ptr, sz);
                        unxlate_dev_mem_ptr(p, ptr);
                        if (probe)
                                goto failed;

diff --git a/drivers/dio/dio.c b/drivers/dio/dio.c
index c9aa15f..193b40e 100644 (file)
--- a/drivers/dio/dio.c
+++ b/drivers/dio/dio.c
@@ -135,7 +135,8 @@ int __init dio_find(int deviceid)
                else
                        va = ioremap(pa, PAGE_SIZE);
 
-                if (probe_kernel_read(&i, (unsigned char *)va + DIO_IDOFF, 1)) {
+               if (copy_from_kernel_nofault(&i,
+                               (unsigned char *)va + DIO_IDOFF, 1)) {
                        if (scode >= DIOII_SCBASE)
                                iounmap(va);
                         continue;             /* no board present at that select code */
@@ -208,7 +209,8 @@ static int __init dio_init(void)
                else
                        va = ioremap(pa, PAGE_SIZE);
 
-                if (probe_kernel_read(&i, (unsigned char *)va + DIO_IDOFF, 1)) {
+               if (copy_from_kernel_nofault(&i,
+                               (unsigned char *)va + DIO_IDOFF, 1)) {
                        if (scode >= DIOII_SCBASE)
                                iounmap(va);
                         continue;              /* no board present at that select code */

diff --git a/drivers/input/serio/hp_sdc.c b/drivers/input/serio/hp_sdc.c
index 6542523..13eacf6 100644 (file)
--- a/drivers/input/serio/hp_sdc.c
+++ b/drivers/input/serio/hp_sdc.c
@@ -1021,7 +1021,7 @@ static int __init hp_sdc_register(void)
        hp_sdc.base_io   = (unsigned long) 0xf0428000;
        hp_sdc.data_io   = (unsigned long) hp_sdc.base_io + 1;
        hp_sdc.status_io = (unsigned long) hp_sdc.base_io + 3;
-       if (!probe_kernel_read(&i, (unsigned char *)hp_sdc.data_io, 1))
+       if (!copy_from_kernel_nofault(&i, (unsigned char *)hp_sdc.data_io, 1))
                hp_sdc.dev = (void *)1;
        hp_sdc.dev_err   = hp_sdc_init();
 #endif

diff --git a/drivers/misc/kgdbts.c b/drivers/misc/kgdbts.c
index bccd341..d5d2af4 100644 (file)
--- a/drivers/misc/kgdbts.c
+++ b/drivers/misc/kgdbts.c
@@ -828,7 +828,7 @@ static void run_plant_and_detach_test(int is_early)
        char before[BREAK_INSTR_SIZE];
        char after[BREAK_INSTR_SIZE];
 
-       probe_kernel_read(before, (char *)kgdbts_break_test,
+       copy_from_kernel_nofault(before, (char *)kgdbts_break_test,
          BREAK_INSTR_SIZE);
        init_simple_test();
        ts.tst = plant_and_detach_test;
@@ -836,8 +836,8 @@ static void run_plant_and_detach_test(int is_early)
        /* Activate test with initial breakpoint */
        if (!is_early)
                kgdb_breakpoint();
-       probe_kernel_read(after, (char *)kgdbts_break_test,
-         BREAK_INSTR_SIZE);
+       copy_from_kernel_nofault(after, (char *)kgdbts_break_test,
+                       BREAK_INSTR_SIZE);
        if (memcmp(before, after, BREAK_INSTR_SIZE)) {
                printk(KERN_CRIT "kgdbts: ERROR kgdb corrupted memory\n");
                panic("kgdb memory corruption");

diff --git a/drivers/video/fbdev/hpfb.c b/drivers/video/fbdev/hpfb.c
index f02be0d..8d418ab 100644 (file)
--- a/drivers/video/fbdev/hpfb.c
+++ b/drivers/video/fbdev/hpfb.c
@@ -402,7 +402,7 @@ int __init hpfb_init(void)
        if (err)
                return err;
 
-       err = probe_kernel_read(&i, (unsigned char *)INTFBVADDR + DIO_IDOFF, 1);
+       err = copy_from_kernel_nofault(&i, (unsigned char *)INTFBVADDR + DIO_IDOFF, 1);
 
        if (!err && (i == DIO_ID_FBUFFER) && topcat_sid_ok(sid = DIO_SECID(INTFBVADDR))) {
                if (!request_mem_region(INTFBPADDR, DIO_DEVSIZE, "Internal Topcat"))

diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index 8ba492d..e502414 100644 (file)
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -512,7 +512,8 @@ read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos)
                                 * Using bounce buffer to bypass the
                                 * hardened user copy kernel text checks.
                                 */
-                               if (probe_kernel_read(buf, (void *) start, tsz)) {
+                               if (copy_from_kernel_nofault(buf, (void *)start,
+                                               tsz)) {
                                        if (clear_user(buffer, tsz)) {
                                                ret = -EFAULT;
                                                goto out;

diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index 7bcadca..70a3d9c 100644 (file)
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -301,13 +301,14 @@ copy_struct_from_user(void *dst, size_t ksize, const void __user *src,
        return 0;
 }
 
-bool probe_kernel_read_allowed(const void *unsafe_src, size_t size);
+bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size);
 
-extern long probe_kernel_read(void *dst, const void *src, size_t size);
-extern long probe_user_read(void *dst, const void __user *src, size_t size);
+long copy_from_kernel_nofault(void *dst, const void *src, size_t size);
+long notrace copy_to_kernel_nofault(void *dst, const void *src, size_t size);
 
-extern long notrace probe_kernel_write(void *dst, const void *src, size_t size);
-extern long notrace probe_user_write(void __user *dst, const void *src, size_t size);
+extern long probe_user_read(void *dst, const void __user *src, size_t size);
+extern long notrace probe_user_write(void __user *dst, const void *src,
+               size_t size);
 
 long strncpy_from_kernel_nofault(char *dst, const void *unsafe_addr,
                long count);
@@ -324,7 +325,7 @@ long strnlen_user_nofault(const void __user *unsafe_addr, long count);
  * Returns 0 on success, or -EFAULT.
  */
 #define probe_kernel_address(addr, retval)             \
-       probe_kernel_read(&retval, addr, sizeof(retval))
+       copy_from_kernel_nofault(&retval, addr, sizeof(retval))
 
 #ifndef user_access_begin
 #define user_access_begin(ptr,len) access_ok(ptr, len)

diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c
index ccc0f98..bc8d25f 100644 (file)
--- a/kernel/debug/debug_core.c
+++ b/kernel/debug/debug_core.c
@@ -169,18 +169,18 @@ int __weak kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt)
 {
        int err;
 
-       err = probe_kernel_read(bpt->saved_instr, (char *)bpt->bpt_addr,
+       err = copy_from_kernel_nofault(bpt->saved_instr, (char *)bpt->bpt_addr,
                                BREAK_INSTR_SIZE);
        if (err)
                return err;
-       err = probe_kernel_write((char *)bpt->bpt_addr,
+       err = copy_to_kernel_nofault((char *)bpt->bpt_addr,
                                 arch_kgdb_ops.gdb_bpt_instr, BREAK_INSTR_SIZE);
        return err;
 }
 
 int __weak kgdb_arch_remove_breakpoint(struct kgdb_bkpt *bpt)
 {
-       return probe_kernel_write((char *)bpt->bpt_addr,
+       return copy_to_kernel_nofault((char *)bpt->bpt_addr,
                                  (char *)bpt->saved_instr, BREAK_INSTR_SIZE);
 }
 

diff --git a/kernel/debug/gdbstub.c b/kernel/debug/gdbstub.c
index 4b280fc..61774ae 100644 (file)
--- a/kernel/debug/gdbstub.c
+++ b/kernel/debug/gdbstub.c
@@ -247,7 +247,7 @@ char *kgdb_mem2hex(char *mem, char *buf, int count)
         */
        tmp = buf + count;
 
-       err = probe_kernel_read(tmp, mem, count);
+       err = copy_from_kernel_nofault(tmp, mem, count);
        if (err)
                return NULL;
        while (count > 0) {
@@ -283,7 +283,7 @@ int kgdb_hex2mem(char *buf, char *mem, int count)
                *tmp_raw |= hex_to_bin(*tmp_hex--) << 4;
        }
 
-       return probe_kernel_write(mem, tmp_raw, count);
+       return copy_to_kernel_nofault(mem, tmp_raw, count);
 }
 
 /*
@@ -335,7 +335,7 @@ static int kgdb_ebin2mem(char *buf, char *mem, int count)
                size++;
        }
 
-       return probe_kernel_write(mem, c, size);
+       return copy_to_kernel_nofault(mem, c, size);
 }
 
 #if DBG_MAX_REG_NUM > 0

diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
index ec19056..5c79490 100644 (file)
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -2326,7 +2326,8 @@ void kdb_ps1(const struct task_struct *p)
        int cpu;
        unsigned long tmp;
 
-       if (!p || probe_kernel_read(&tmp, (char *)p, sizeof(unsigned long)))
+       if (!p ||
+           copy_from_kernel_nofault(&tmp, (char *)p, sizeof(unsigned long)))
                return;
 
        cpu = kdb_process_cpu(p);

diff --git a/kernel/debug/kdb/kdb_support.c b/kernel/debug/kdb/kdb_support.c
index b8e6306..004c5b6 100644 (file)
--- a/kernel/debug/kdb/kdb_support.c
+++ b/kernel/debug/kdb/kdb_support.c
@@ -325,7 +325,7 @@ char *kdb_strdup(const char *str, gfp_t type)
  */
 int kdb_getarea_size(void *res, unsigned long addr, size_t size)
 {
-       int ret = probe_kernel_read((char *)res, (char *)addr, size);
+       int ret = copy_from_kernel_nofault((char *)res, (char *)addr, size);
        if (ret) {
                if (!KDB_STATE(SUPPRESS)) {
                        kdb_printf("kdb_getarea: Bad address 0x%lx\n", addr);
@@ -350,7 +350,7 @@ int kdb_getarea_size(void *res, unsigned long addr, size_t size)
  */
 int kdb_putarea_size(unsigned long addr, void *res, size_t size)
 {
-       int ret = probe_kernel_read((char *)addr, (char *)res, size);
+       int ret = copy_from_kernel_nofault((char *)addr, (char *)res, size);
        if (ret) {
                if (!KDB_STATE(SUPPRESS)) {
                        kdb_printf("kdb_putarea: Bad address 0x%lx\n", addr);
@@ -624,7 +624,8 @@ char kdb_task_state_char (const struct task_struct *p)
        char state;
        unsigned long tmp;
 
-       if (!p || probe_kernel_read(&tmp, (char *)p, sizeof(unsigned long)))
+       if (!p ||
+           copy_from_kernel_nofault(&tmp, (char *)p, sizeof(unsigned long)))
                return 'E';
 
        cpu = kdb_process_cpu(p);

diff --git a/kernel/kthread.c b/kernel/kthread.c
index 8e3d2d7..132f84a 100644 (file)
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -201,7 +201,7 @@ void *kthread_probe_data(struct task_struct *task)
        struct kthread *kthread = to_kthread(task);
        void *data = NULL;
 
-       probe_kernel_read(&data, &kthread->data, sizeof(data));
+       copy_from_kernel_nofault(&data, &kthread->data, sizeof(data));
        return data;
 }
 

diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index e729c9e..204afc1 100644 (file)
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -196,7 +196,7 @@ bpf_probe_read_kernel_common(void *dst, u32 size, const void *unsafe_ptr)
 
        if (unlikely(ret < 0))
                goto fail;
-       ret = probe_kernel_read(dst, unsafe_ptr, size);
+       ret = copy_from_kernel_nofault(dst, unsafe_ptr, size);
        if (unlikely(ret < 0))
                goto fail;
        return ret;
@@ -661,7 +661,7 @@ BPF_CALL_5(bpf_seq_printf, struct seq_file *, m, char *, fmt, u32, fmt_size,
 
                        copy_size = (fmt[i + 2] == '4') ? 4 : 16;
 
-                       err = probe_kernel_read(bufs->buf[memcpy_cnt],
+                       err = copy_from_kernel_nofault(bufs->buf[memcpy_cnt],
                                                (void *) (long) args[fmt_cnt],
                                                copy_size);
                        if (err < 0)

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 6048f1b..841c748 100644 (file)
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1222,7 +1222,7 @@ fetch_store_strlen(unsigned long addr)
 #endif
 
        do {
-               ret = probe_kernel_read(&c, (u8 *)addr + len, 1);
+               ret = copy_from_kernel_nofault(&c, (u8 *)addr + len, 1);
                len++;
        } while (c && ret == 0 && len < MAX_STRING_SIZE);
 
@@ -1300,7 +1300,7 @@ probe_mem_read(void *dest, void *src, size_t size)
        if ((unsigned long)src < TASK_SIZE)
                return probe_mem_read_user(dest, src, size);
 #endif
-       return probe_kernel_read(dest, src, size);
+       return copy_from_kernel_nofault(dest, src, size);
 }
 
 /* Note that we don't verify it, since the code does not come from user space */

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 9fbe1e2..c41c3c1 100644 (file)
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -4638,11 +4638,11 @@ void print_worker_info(const char *log_lvl, struct task_struct *task)
         * Carefully copy the associated workqueue's workfn, name and desc.
         * Keep the original last '\0' in case the original is garbage.
         */
-       probe_kernel_read(&fn, &worker->current_func, sizeof(fn));
-       probe_kernel_read(&pwq, &worker->current_pwq, sizeof(pwq));
-       probe_kernel_read(&wq, &pwq->wq, sizeof(wq));
-       probe_kernel_read(name, wq->name, sizeof(name) - 1);
-       probe_kernel_read(desc, worker->desc, sizeof(desc) - 1);
+       copy_from_kernel_nofault(&fn, &worker->current_func, sizeof(fn));
+       copy_from_kernel_nofault(&pwq, &worker->current_pwq, sizeof(pwq));
+       copy_from_kernel_nofault(&wq, &pwq->wq, sizeof(wq));
+       copy_from_kernel_nofault(name, wq->name, sizeof(name) - 1);
+       copy_from_kernel_nofault(desc, worker->desc, sizeof(desc) - 1);
 
        if (fn || name[0] || desc[0]) {
                printk("%sWorkqueue: %s %ps", log_lvl, name, fn);

diff --git a/mm/debug.c b/mm/debug.c
index b5b1de8..4f37651 100644 (file)
--- a/mm/debug.c
+++ b/mm/debug.c
@@ -120,9 +120,9 @@ void __dump_page(struct page *page, const char *reason)
                 * mapping can be invalid pointer and we don't want to crash
                 * accessing it, so probe everything depending on it carefully
                 */
-               if (probe_kernel_read(&host, &mapping->host,
+               if (copy_from_kernel_nofault(&host, &mapping->host,
                                        sizeof(struct inode *)) ||
-                   probe_kernel_read(&a_ops, &mapping->a_ops,
+                   copy_from_kernel_nofault(&a_ops, &mapping->a_ops,
                                sizeof(struct address_space_operations *))) {
                        pr_warn("failed to read mapping->host or a_ops, mapping not a valid kernel address?\n");
                        goto out_mapping;
@@ -133,7 +133,7 @@ void __dump_page(struct page *page, const char *reason)
                        goto out_mapping;
                }
 
-               if (probe_kernel_read(&dentry_first,
+               if (copy_from_kernel_nofault(&dentry_first,
                        &host->i_dentry.first, sizeof(struct hlist_node *))) {
                        pr_warn("mapping->a_ops:%ps with invalid mapping->host inode address %px\n",
                                a_ops, host);
@@ -146,7 +146,7 @@ void __dump_page(struct page *page, const char *reason)
                }
 
                dentry_ptr = container_of(dentry_first, struct dentry, d_u.d_alias);
-               if (probe_kernel_read(&dentry, dentry_ptr,
+               if (copy_from_kernel_nofault(&dentry, dentry_ptr,
                                                        sizeof(struct dentry))) {
                        pr_warn("mapping->aops:%ps with invalid mapping->host->i_dentry.first %px\n",
                                a_ops, dentry_ptr);

diff --git a/mm/maccess.c b/mm/maccess.c
index 88845ed..cc5d8c6 100644 (file)
--- a/mm/maccess.c
+++ b/mm/maccess.c
@@ -6,14 +6,15 @@
 #include <linux/mm.h>
 #include <linux/uaccess.h>
 
-bool __weak probe_kernel_read_allowed(const void *unsafe_src, size_t size)
+bool __weak copy_from_kernel_nofault_allowed(const void *unsafe_src,
+               size_t size)
 {
        return true;
 }
 
 #ifdef HAVE_GET_KERNEL_NOFAULT
 
-#define probe_kernel_read_loop(dst, src, len, type, err_label)         \
+#define copy_from_kernel_nofault_loop(dst, src, len, type, err_label)  \
        while (len >= sizeof(type)) {                                   \
                __get_kernel_nofault(dst, src, type, err_label);                \
                dst += sizeof(type);                                    \
@@ -21,25 +22,25 @@ bool __weak probe_kernel_read_allowed(const void *unsafe_src, size_t size)
                len -= sizeof(type);                                    \
        }
 
-long probe_kernel_read(void *dst, const void *src, size_t size)
+long copy_from_kernel_nofault(void *dst, const void *src, size_t size)
 {
-       if (!probe_kernel_read_allowed(src, size))
+       if (!copy_from_kernel_nofault_allowed(src, size))
                return -ERANGE;
 
        pagefault_disable();
-       probe_kernel_read_loop(dst, src, size, u64, Efault);
-       probe_kernel_read_loop(dst, src, size, u32, Efault);
-       probe_kernel_read_loop(dst, src, size, u16, Efault);
-       probe_kernel_read_loop(dst, src, size, u8, Efault);
+       copy_from_kernel_nofault_loop(dst, src, size, u64, Efault);
+       copy_from_kernel_nofault_loop(dst, src, size, u32, Efault);
+       copy_from_kernel_nofault_loop(dst, src, size, u16, Efault);
+       copy_from_kernel_nofault_loop(dst, src, size, u8, Efault);
        pagefault_enable();
        return 0;
 Efault:
        pagefault_enable();
        return -EFAULT;
 }
-EXPORT_SYMBOL_GPL(probe_kernel_read);
+EXPORT_SYMBOL_GPL(copy_from_kernel_nofault);
 
-#define probe_kernel_write_loop(dst, src, len, type, err_label)                \
+#define copy_to_kernel_nofault_loop(dst, src, len, type, err_label)    \
        while (len >= sizeof(type)) {                                   \
                __put_kernel_nofault(dst, src, type, err_label);                \
                dst += sizeof(type);                                    \
@@ -47,13 +48,13 @@ EXPORT_SYMBOL_GPL(probe_kernel_read);
                len -= sizeof(type);                                    \
        }
 
-long probe_kernel_write(void *dst, const void *src, size_t size)
+long copy_to_kernel_nofault(void *dst, const void *src, size_t size)
 {
        pagefault_disable();
-       probe_kernel_write_loop(dst, src, size, u64, Efault);
-       probe_kernel_write_loop(dst, src, size, u32, Efault);
-       probe_kernel_write_loop(dst, src, size, u16, Efault);
-       probe_kernel_write_loop(dst, src, size, u8, Efault);
+       copy_to_kernel_nofault_loop(dst, src, size, u64, Efault);
+       copy_to_kernel_nofault_loop(dst, src, size, u32, Efault);
+       copy_to_kernel_nofault_loop(dst, src, size, u16, Efault);
+       copy_to_kernel_nofault_loop(dst, src, size, u8, Efault);
        pagefault_enable();
        return 0;
 Efault:
@@ -67,7 +68,7 @@ long strncpy_from_kernel_nofault(char *dst, const void *unsafe_addr, long count)
 
        if (unlikely(count <= 0))
                return 0;
-       if (!probe_kernel_read_allowed(unsafe_addr, count))
+       if (!copy_from_kernel_nofault_allowed(unsafe_addr, count))
                return -ERANGE;
 
        pagefault_disable();
@@ -87,7 +88,7 @@ Efault:
 }
 #else /* HAVE_GET_KERNEL_NOFAULT */
 /**
- * probe_kernel_read(): safely attempt to read from kernel-space
+ * copy_from_kernel_nofault(): safely attempt to read from kernel-space
  * @dst: pointer to the buffer that shall take the data
  * @src: address to read from
  * @size: size of the data chunk
@@ -98,15 +99,15 @@ Efault:
  *
  * We ensure that the copy_from_user is executed in atomic context so that
  * do_page_fault() doesn't attempt to take mmap_lock.  This makes
- * probe_kernel_read() suitable for use within regions where the caller
+ * copy_from_kernel_nofault() suitable for use within regions where the caller
  * already holds mmap_lock, or other locks which nest inside mmap_lock.
  */
-long probe_kernel_read(void *dst, const void *src, size_t size)
+long copy_from_kernel_nofault(void *dst, const void *src, size_t size)
 {
        long ret;
        mm_segment_t old_fs = get_fs();
 
-       if (!probe_kernel_read_allowed(src, size))
+       if (!copy_from_kernel_nofault_allowed(src, size))
                return -ERANGE;
 
        set_fs(KERNEL_DS);
@@ -120,10 +121,10 @@ long probe_kernel_read(void *dst, const void *src, size_t size)
                return -EFAULT;
        return 0;
 }
-EXPORT_SYMBOL_GPL(probe_kernel_read);
+EXPORT_SYMBOL_GPL(copy_from_kernel_nofault);
 
 /**
- * probe_kernel_write(): safely attempt to write to a location
+ * copy_to_kernel_nofault(): safely attempt to write to a location
  * @dst: address to write to
  * @src: pointer to the data that shall be written
  * @size: size of the data chunk
@@ -131,7 +132,7 @@ EXPORT_SYMBOL_GPL(probe_kernel_read);
  * Safely write to address @dst from the buffer at @src.  If a kernel fault
  * happens, handle that and return -EFAULT.
  */
-long probe_kernel_write(void *dst, const void *src, size_t size)
+long copy_to_kernel_nofault(void *dst, const void *src, size_t size)
 {
        long ret;
        mm_segment_t old_fs = get_fs();
@@ -174,7 +175,7 @@ long strncpy_from_kernel_nofault(char *dst, const void *unsafe_addr, long count)
 
        if (unlikely(count <= 0))
                return 0;
-       if (!probe_kernel_read_allowed(unsafe_addr, count))
+       if (!copy_from_kernel_nofault_allowed(unsafe_addr, count))
                return -ERANGE;
 
        set_fs(KERNEL_DS);

diff --git a/mm/rodata_test.c b/mm/rodata_test.c
index 5e313fa..2a99df7 100644 (file)
--- a/mm/rodata_test.c
+++ b/mm/rodata_test.c
@@ -25,7 +25,7 @@ void rodata_test(void)
        }
 
        /* test 2: write to the variable; this should fault */
-       if (!probe_kernel_write((void *)&rodata_test_data,
+       if (!copy_to_kernel_nofault((void *)&rodata_test_data,
                                (void *)&zero, sizeof(zero))) {
                pr_err("test data was not read only\n");
                return;

diff --git a/mm/slub.c b/mm/slub.c
index b8f798b..fe81773 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -292,7 +292,7 @@ static inline void *get_freepointer_safe(struct kmem_cache *s, void *object)
                return get_freepointer(s, object);
 
        freepointer_addr = (unsigned long)object + s->offset;
-       probe_kernel_read(&p, (void **)freepointer_addr, sizeof(p));
+       copy_from_kernel_nofault(&p, (void **)freepointer_addr, sizeof(p));
        return freelist_ptr(s, p, freepointer_addr);
 }