[PATCH 06/23] maccess: rename strncpy_from_unsafe_user to strncpy_from_user_nofault

Christoph Hellwig
2020-05-21T15:25:45Z

This matches the naming of strncpy_from_user, and also makes it more
clear what the function is supposed to do.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
include/linux/uaccess.h | 4 ++--
kernel/trace/bpf_trace.c | 4 ++--
kernel/trace/trace_kprobe.c | 2 +-
mm/maccess.c | 4 ++--
4 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index 5a36a298a85f8..b983cb1c1216a 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -313,8 +313,8 @@ extern long strncpy_from_unsafe(char *dst, const void *unsafe_addr, long count);
extern long strncpy_from_unsafe_strict(char *dst, const void *unsafe_addr,
long count);
extern long __strncpy_from_unsafe(char *dst, const void *unsafe_addr, long count);
-extern long strncpy_from_unsafe_user(char *dst, const void __user *unsafe_addr,
- long count);
+long strncpy_from_user_nofault(char *dst, const void __user *unsafe_addr,
+ long count);
extern long strnlen_unsafe_user(const void __user *unsafe_addr, long count);

/**
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index a010edc37ee02..4e20bf1d95832 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -159,7 +159,7 @@ static const struct bpf_func_proto bpf_probe_read_user_proto = {
BPF_CALL_3(bpf_probe_read_user_str, void *, dst, u32, size,
const void __user *, unsafe_ptr)
{
- int ret = strncpy_from_unsafe_user(dst, unsafe_ptr, size);
+ int ret = strncpy_from_user_nofault(dst, unsafe_ptr, size);

if (unlikely(ret < 0))
memset(dst, 0, size);
@@ -416,7 +416,7 @@ BPF_CALL_5(bpf_trace_printk, char *, fmt, u32, fmt_size, u64, arg1,
sizeof(buf));
break;
case 'u':
- strncpy_from_unsafe_user(buf,
+ strncpy_from_user_nofault(buf,
(__force void __user *)unsafe_ptr,
sizeof(buf));
break;
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 35989383ae113..d600f41fda1ca 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1268,7 +1268,7 @@ fetch_store_string_user(unsigned long addr, void *dest, void *base)

__dest = get_loc_data(dest, base);

- ret = strncpy_from_unsafe_user(__dest, uaddr, maxlen);
+ ret = strncpy_from_user_nofault(__dest, uaddr, maxlen);
if (ret >= 0)
*(u32 *)dest = make_data_loc(ret, __dest - base);

diff --git a/mm/maccess.c b/mm/maccess.c
index 65880ba2ca376..457d8f9bf714f 100644
--- a/mm/maccess.c
+++ b/mm/maccess.c
@@ -215,7 +215,7 @@ long __strncpy_from_unsafe(char *dst, const void *unsafe_addr, long count)
}

/**
- * strncpy_from_unsafe_user: - Copy a NUL terminated string from unsafe user
+ * strncpy_from_user_nofault: - Copy a NUL terminated string from unsafe user
* address.
* @dst: Destination address, in kernel space. This buffer must be at
* least @count bytes long.
@@ -232,7 +232,7 @@ long __strncpy_from_unsafe(char *dst, const void *unsafe_addr, long count)
* If @count is smaller than the length of the string, copies @count-1 bytes,
* sets the last byte of @dst buffer to NUL and returns @count.
*/
-long strncpy_from_unsafe_user(char *dst, const void __user *unsafe_addr,
+long strncpy_from_user_nofault(char *dst, const void __user *unsafe_addr,
long count)
{
mm_segment_t old_fs = get_fs();
--
2.26.2