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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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21
tools/acrn-crashlog/common/strutils.c
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@@ -74,11 +74,16 @@ static char *strtriml(char *str)
static char *strtrimr(char *str)
{
char *end = str + strlen(str) - 1;
size_t len;
char *end;
while (*end == ' ' && end >= str) {
*end = 0;
end--;
len = strlen(str);
if (len > 0) {
end = str + strlen(str) - 1;
while (*end == ' ' && end >= str) {
*end = 0;
end--;
}
}
return str;
@@ -86,8 +91,12 @@ static char *strtrimr(char *str)
char *strtrim(char *str)
{
strtrimr(str);
return strtriml(str);
if (str) {
strtrimr(str);
return strtriml(str);
}
return NULL;
}
int strcnt(char *str, char c)