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tools: acrn-crashlog: fix potential issues under common and usercrash

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This patch is to fix buffer overflow, return value not unified and
variable type not matched issues. And add some judge logic to improve
code quality.

Changes:
1. Handle the fd properly in the failing case.
2. Fix buffer overflow issues and null pointer access issues.
3. Fix the format issue in log_sys.c.
4. Remove the useless branch and adjust the function logic.
5. Add some checks for the string length before using strcpy/strcat/memcpy.
6. Fix strncpy null-terminated issues.
7. Change the return value to unify the return type.

Signed-off-by: CHEN Gang <gang.c.chen@intel.com>
Signed-off-by: xiaojin2 <xiaojing.liu@intel.com>
Reviewed-by: Zhi Jin <zhi.jin@intel.com>
Reviewed-by: Liu Xinwu <xinwu.liu@intel.com>
Acked-by: Zhang Di <di.zhang@intel.com>
This commit is contained in:
xiaojin2
2018-06-08 12:47:59 +08:00
committed by lijinxia
parent 48067b1cab
commit cb39badf82
10 changed files with 111 additions and 80 deletions
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4
tools/acrn-crashlog/common/log_sys.c
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@@ -19,7 +19,7 @@ void do_log(const int level,
char log[MAX_LOG_LEN];
int n = 0;
#ifdef DEBUG_ACRN_CRASHLOG
const char header_fmt[] = "<%-20s%d>: ";
const char header_fmt[] = "<%-20s%5d>: ";
#endif
if (level > LOG_LEVEL)
@@ -37,7 +37,7 @@ void do_log(const int level,
#ifdef DEBUG_ACRN_CRASHLOG
/* header */
n = snprintf(log, sizeof(log), header_fmt, func, line);
if (n < 0 || n >= sizeof(log))
if (n < 0 || (size_t)n >= sizeof(log))
n = 0;
#endif
/* msg */