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Fixed some issues found by static analyzers #2634

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Fixed some issues found by static analyzers #2634

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83ea625
fix(dracut-util): memory leak
lnykryn Mar 5, 2024
6e7c1c0
fix(dracut-install): buffer overrun
lnykryn Mar 5, 2024
88918bf
fix(dracut-util): memory leak
lnykryn Mar 5, 2024
9d1742a
fix(dracut-install): memory leak
lnykryn Mar 5, 2024
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3 changes: 2 additions & 1 deletion src/install/dracut-install.c
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Original file line number Diff line number Diff line change
Expand Up @@ -473,7 +473,7 @@ static char *get_real_file(const char *src, bool fullyresolve)
return NULL;
}

linksz = readlink(fullsrcpath, linktarget, sizeof(linktarget));
linksz = readlink(fullsrcpath, linktarget, sizeof(linktarget) - 1);
if (linksz < 0)
return NULL;
linktarget[linksz] = '\0';
Expand Down Expand Up @@ -1140,6 +1140,7 @@ static int parse_argv(int argc, char *argv[])
kerneldir = optarg;
break;
case ARG_FIRMWAREDIRS:
strv_free(firmwaredirs);
firmwaredirs = strv_split(optarg, ":");
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Not related to the fix, but maybe add a check that strv_split() succeeded?

break;
case 'f':
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34 changes: 26 additions & 8 deletions src/util/util.c
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Expand Up @@ -180,12 +180,12 @@ static int getarg(int argc, char **argv)
char *end_value = NULL;
bool bool_value = false;
char *cmdline = NULL;
char *cmdline_iter = NULL;
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Merge this into the preceding line?

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Also, the var doesn't have to be initialized.


char *p = getenv("CMDLINE");
if (p == NULL) {
usage(GETARG, EXIT_FAILURE, "CMDLINE env not set");
}
cmdline = strdup(p);

if (argc != 2) {
usage(GETARG, EXIT_FAILURE, "Number of arguments invalid");
Expand All @@ -204,9 +204,16 @@ static int getarg(int argc, char **argv)
if (strlen(search_key) == 0)
usage(GETARG, EXIT_FAILURE, "search key undefined");

cmdline = strdup(p);
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Hmm, I see no reason to copy p in the first place... The function could just use it directly, i.e., initialize cmdline (the iterator) simply as cmdline = p. Or have I overlooked something?

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I have... next_arg() modifies the string, so it must be copied. So scratch this.

if (cmdline == NULL) {
fprintf(stderr, "ERROR: out of memory.\n");
exit(EXIT_FAILURE);
}
cmdline_iter = cmdline;

do {
char *key = NULL, *value = NULL;
cmdline = next_arg(cmdline, &key, &value);
cmdline = next_arg(cmdline_iter, &key, &value);
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cmdline_iter = ...

if (strcmp(key, search_key) == 0) {
if (value) {
end_value = value;
Expand All @@ -216,7 +223,9 @@ static int getarg(int argc, char **argv)
bool_value = true;
}
}
} while (cmdline[0]);
} while (cmdline_iter[0]);

free(cmdline);

if (search_value) {
if (end_value && strcmp(end_value, search_value) == 0) {
Expand Down Expand Up @@ -244,16 +253,15 @@ static int getargs(int argc, char **argv)
char *search_value;
bool found_value = false;
char *cmdline = NULL;
char *cmdline_iter = NULL;
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@dtardon dtardon Mar 7, 2024 •
edited
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Merge this into the preceding line?


char *p = getenv("CMDLINE");
if (p == NULL) {
usage(GETARGS, EXIT_FAILURE, "CMDLINE env not set");
}
cmdline = strdup(p);

if (argc != 2) {
if (argc != 2)
usage(GETARGS, EXIT_FAILURE, "Number of arguments invalid");
}

search_key = argv[1];

Expand All @@ -268,9 +276,16 @@ static int getargs(int argc, char **argv)
if (strlen(search_key) == 0)
usage(GETARGS, EXIT_FAILURE, "search key undefined");

cmdline = strdup(p);
if (cmdline == NULL) {
fprintf(stderr, "ERROR: out of memory.\n");
exit(EXIT_FAILURE);
}
cmdline_iter = cmdline;

do {
char *key = NULL, *value = NULL;
cmdline = next_arg(cmdline, &key, &value);
cmdline = next_arg(cmdline_iter, &key, &value);
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cmdline_iter = ...

if (strcmp(key, search_key) == 0) {
if (search_value) {
if (strcmp(value, search_value) == 0) {
Expand All @@ -286,7 +301,10 @@ static int getargs(int argc, char **argv)
found_value = true;
}
}
} while (cmdline[0]);
} while (cmdline_iter[0]);

free(cmdline_iter);
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free(cmdline)


return found_value ? EXIT_SUCCESS : EXIT_FAILURE;
}

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