[PATCH] kdb: prefer strlcpy to strncpy

[Nick Desaulniers]

Fixes stringop-truncation and stringop-overflow warnings from gcc-8.

Signed-off-by: Nick Desaulniers <nick.desaulni...@gmail.com>
---
 kernel/debug/kdb/kdb_io.c      | 2 +-
 kernel/debug/kdb/kdb_main.c    | 4 ++--
 kernel/debug/kdb/kdb_support.c | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/debug/kdb/kdb_io.c b/kernel/debug/kdb/kdb_io.c
index ed5d349..b5dfff1 100644
--- a/kernel/debug/kdb/kdb_io.c
+++ b/kernel/debug/kdb/kdb_io.c
@@ -443,7 +443,7 @@ static char *kdb_read(char *buffer, size_t bufsize)
 char *kdb_getstr(char *buffer, size_t bufsize, const char *prompt)
 {
        if (prompt && kdb_prompt_str != prompt)
-               strncpy(kdb_prompt_str, prompt, CMD_BUFLEN);
+               strlcpy(kdb_prompt_str, prompt, CMD_BUFLEN);
        kdb_printf(kdb_prompt_str);
        kdb_nextline = 1;       /* Prompt and input resets line number */
        return kdb_read(buffer, bufsize);
diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
index e405677..c30a0d8 100644
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -1103,12 +1103,12 @@ static int handle_ctrl_cmd(char *cmd)
        case CTRL_P:
                if (cmdptr != cmd_tail)
                        cmdptr = (cmdptr-1) % KDB_CMD_HISTORY_COUNT;
-               strncpy(cmd_cur, cmd_hist[cmdptr], CMD_BUFLEN);
+               strlcpy(cmd_cur, cmd_hist[cmdptr], CMD_BUFLEN);
                return 1;
        case CTRL_N:
                if (cmdptr != cmd_head)
                        cmdptr = (cmdptr+1) % KDB_CMD_HISTORY_COUNT;
-               strncpy(cmd_cur, cmd_hist[cmdptr], CMD_BUFLEN);
+               strlcpy(cmd_cur, cmd_hist[cmdptr], CMD_BUFLEN);
                return 1;
        }
        return 0;
diff --git a/kernel/debug/kdb/kdb_support.c b/kernel/debug/kdb/kdb_support.c
index 990b3cc..dcfbf8f 100644
--- a/kernel/debug/kdb/kdb_support.c
+++ b/kernel/debug/kdb/kdb_support.c
@@ -236,7 +236,7 @@ int kallsyms_symbol_next(char *prefix_name, int flag)
 
        while ((name = kdb_walk_kallsyms(&pos))) {
                if (strncmp(name, prefix_name, prefix_len) == 0) {
-                       strncpy(prefix_name, name, strlen(name)+1);
+                       strlcpy(prefix_name, name, prefix_len);
                        return 1;
                }
        }
-- 
2.7.4