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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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13
tools/acrn-crashlog/common/fsutils.c
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@@ -114,11 +114,12 @@ char *mm_get_line(struct mm_file_t *mfile, int line)
if (line <= 0 || line > mm_count_lines(mfile))
return NULL;
else if (line == 1)
if (line == 1)
ret = begin;
else {
next = begin;
for (i = 2; i <= line; i++)
for (i = 2; i <= line && next; i++)
next = strchr(next, '\n') + 1;
ret = next;
}
@@ -820,7 +821,7 @@ int read_full_binary_file(const char *path, unsigned long *size, void **data)
close_file(path, f);
*data = buf;
*size = (unsigned int)_size;
*size = (unsigned long)_size;
return 0;
@@ -1112,7 +1113,7 @@ int read_file(const char *path, unsigned long *size, void **data)
int len = 0;
int fd = 0;
int memsize = 1; /* for '\0' */
size_t result = 0;
ssize_t result = 0;
char *out = NULL;
char *new;
@@ -1129,6 +1130,8 @@ int read_file(const char *path, unsigned long *size, void **data)
result = read(fd, (void *)tmp, 1024);
if (result == 0)
break;
else if (result == -1)
goto free;
memsize += result;
new = realloc(out, memsize);
@@ -1145,7 +1148,7 @@ int read_file(const char *path, unsigned long *size, void **data)
close(fd);
*data = out;
*size = (unsigned int)len;
*size = (unsigned long)len;
return 0;