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maccess: rename strncpy_from_unsafe_user to strncpy_from_user_nofault

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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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20200521152301.2587579-7-hch@lst.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2020-06-08 21:34:14 -07:00 committed by Linus Torvalds
parent 3f0acb1eb3
commit bd88bb5d40
4 changed files with 7 additions and 7 deletions
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4
include/linux/uaccess.h
View File

@ -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);
/**

4
kernel/trace/bpf_trace.c
View File

@ -159,7 +159,7 @@ 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);
@ -419,7 +419,7 @@ fmt_str:
sizeof(buf));
break;
case 'u':
strncpy_from_unsafe_user(buf,
strncpy_from_user_nofault(buf,
(__force void __user *)unsafe_ptr,
sizeof(buf));
break;

2
kernel/trace/trace_kprobe.c
View File

@ -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);

4
mm/maccess.c
View File

@ -217,7 +217,7 @@ 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.
@ -234,7 +234,7 @@ 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();