kdb: Fix bound check compiler warning
The strncpy() function may leave the destination string buffer unterminated, better use strscpy() instead. This fixes the following warning with gcc 8.2: kernel/debug/kdb/kdb_io.c: In function 'kdb_getstr': kernel/debug/kdb/kdb_io.c:449:3: warning: 'strncpy' specified bound 256 equals destination size [-Wstringop-truncation] strncpy(kdb_prompt_str, prompt, CMD_BUFLEN); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: Wenlin Kang <wenlin.kang@windriver.com> Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
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@ -446,7 +446,7 @@ poll_again:
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char *kdb_getstr(char *buffer, size_t bufsize, const char *prompt)
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{
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if (prompt && kdb_prompt_str != prompt)
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strncpy(kdb_prompt_str, prompt, CMD_BUFLEN);
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strscpy(kdb_prompt_str, prompt, CMD_BUFLEN);
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kdb_printf(kdb_prompt_str);
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kdb_nextline = 1; /* Prompt and input resets line number */
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return kdb_read(buffer, bufsize);
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