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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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8
tools/acrn-crashlog/common/cmdutils.c
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@@ -47,7 +47,7 @@ int execv_out2file(char *argv[], char *outfile)
if (pid == 0) {
int res;
int fd;
int fd = -1;
if (outfile) {
fd = open(outfile, O_WRONLY | O_CREAT | O_TRUNC, 0664);
@@ -65,6 +65,8 @@ int execv_out2file(char *argv[], char *outfile)
res = execvp(argv[0], argv);
if (res == -1) {
if (fd > 0)
close(fd);
LOGE("execvp (%s) failed, error (%s)\n", argv[0],
strerror(errno));
return -1;
@@ -211,8 +213,10 @@ char *exec_out2mem(char *fmt, ...)
memsize += 1024;
new = realloc(out, memsize);
if (!new) {
if (out)
if (out) {
free(out);
out = NULL;
}
goto end;
} else {
out = new;