github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-25 07:33:19 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

bpf: Clean code with bpf_copy_to_user()

Browse Source 
No logic change, use bpf_copy_to_user() to clean code.

Signed-off-by: Tao Chen <chen.dylane@linux.dev>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20250703163700.677628-1-chen.dylane@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Tao Chen 2025-07-04 00:37:00 +08:00 committed by Alexei Starovoitov
parent 192e3aa145
commit 3413bc0cf1
1 changed files with 3 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
kernel/bpf/syscall.c
View File

@ -5344,21 +5344,10 @@ static int bpf_task_fd_query_copy(const union bpf_attr *attr,
if (put_user(zero, ubuf))
return -EFAULT;
} else if (input_len >= len + 1) {
/* ubuf can hold the string with NULL terminator */
if (copy_to_user(ubuf, buf, len + 1))
return -EFAULT;
} else {
/* ubuf cannot hold the string with NULL terminator,
* do a partial copy with NULL terminator.
*/
char zero = '\0';
err = -ENOSPC;
if (copy_to_user(ubuf, buf, input_len - 1))
return -EFAULT;
if (put_user(zero, ubuf + input_len - 1))
return -EFAULT;
err = bpf_copy_to_user(ubuf, buf, input_len, len);
if (err == -EFAULT)
return err;
}
}