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Date: Wed, 4 Jun 2014 23:43:09 +0200 From: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se> To: Jason Wessel <jason.wessel@...driver.com>, Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se> Cc: Hedi Berriche <hedi@....com>, Mike Travis <travis@....com>, Ingo Molnar <mingo@...nel.org>, kgdb-bugreport@...ts.sourceforge.net, linux-kernel@...r.kernel.org Subject: [PATCH] kernel: debug: kdb: kdb_main.c: Cleaning up missing null-terminate after strncpy call Added a guaranteed null-terminate after call to strncpy. This was partly found using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se> --- kernel/debug/kdb/kdb_main.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c index 0b097c8..736b025 100644 --- a/kernel/debug/kdb/kdb_main.c +++ b/kernel/debug/kdb/kdb_main.c @@ -1063,12 +1063,14 @@ 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); + strncpy(cmd_cur, cmd_hist[cmdptr], sizeof(cmd_cur)); + cmd_cur[sizeof(cmd_cur) - 1] = '\0'; return 1; case CTRL_N: if (cmdptr != cmd_head) cmdptr = (cmdptr+1) % KDB_CMD_HISTORY_COUNT; - strncpy(cmd_cur, cmd_hist[cmdptr], CMD_BUFLEN); + strncpy(cmd_cur, cmd_hist[cmdptr], sizeof(cmd_cur)); + cmd_cur[sizeof(cmd_cur) - 1] = '\0'; return 1; } return 0; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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