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https://github.com/projectacrn/acrn-hypervisor.git
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6494708f2f
This patch is to fix the potential buffer overflow issues. Signed-off-by: CHEN Gang <gang.c.chen@intel.com> Reviewed-by: Zhi Jin <zhi.jin@intel.com> Reviewed-by: xiaojin2 <xiaojing.liu@intel.com>
54 lines
978 B
C
54 lines
978 B
C
/*
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* Copyright (C) <2018> Intel Corporation
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <stdio.h>
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#include <string.h>
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#include <systemd/sd-journal.h>
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#include "log_sys.h"
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void do_log(const int level,
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#ifdef DEBUG_ACRN_CRASHLOG
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const char *func, const int line,
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#endif
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...)
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{
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va_list args;
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char *fmt;
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char log[MAX_LOG_LEN];
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char *msg_log;
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int n = 0;
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int msg_len = 0;
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#ifdef DEBUG_ACRN_CRASHLOG
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const char header_fmt[] = "<%-20s%5d>: ";
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#endif
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if (level > LOG_LEVEL)
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return;
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#ifdef DEBUG_ACRN_CRASHLOG
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va_start(args, line);
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#else
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va_start(args, level);
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#endif
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fmt = va_arg(args, char *);
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if (!fmt)
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return;
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#ifdef DEBUG_ACRN_CRASHLOG
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/* header */
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n = snprintf(log, sizeof(log), header_fmt, func, line);
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if (n < 0 || (size_t)n >= sizeof(log))
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n = 0;
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#endif
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msg_log = log + n;
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msg_len = sizeof(log) - n;
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/* msg */
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vsnprintf(msg_log, msg_len, fmt, args);
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log[sizeof(log) - 1] = 0;
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va_end(args);
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sd_journal_print(level, "%s", log);
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}
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