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libselinux: declare return value of context_str(3) const

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context_str(3) returns a string representation of the given context.
This string is owned by the context and free'd on context_free(3).
Declare it const, as already done in the man page, since it must not be
free'd by the caller.

Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Acked-by: Nicolas Iooss <nicolas.iooss@m4x.org>
This commit is contained in:
Christian Göttsche 2022-05-20 15:16:10 +02:00 committed by James Carter
parent 0a8c177dac
commit dd98fa3227
5 changed files with 10 additions and 9 deletions
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2
libselinux/include/selinux/context.h
View File

@ -25,7 +25,7 @@ extern "C" {
* for the same context_t*
*/
extern char *context_str(context_t);
extern const char *context_str(context_t);
/* Free the storage used by a context */
extern void context_free(context_t);

2
libselinux/src/context.c
View File

@ -116,7 +116,7 @@ void context_free(context_t context)
/*
* Return a pointer to the string value of the context.
*/
char *context_str(context_t context)
const char *context_str(context_t context)
{
context_private_t *n = context->ptr;
int i;

11
libselinux/src/get_context_list.c
View File

@ -143,6 +143,7 @@ static int get_context_user(FILE * fp,
char *linerole, *linetype;
char **new_reachable = NULL;
char *usercon_str;
const char *usercon_str2;
context_t con;
context_t usercon;
@ -257,20 +258,20 @@ static int get_context_user(FILE * fp,
rc = -1;
goto out;
}
usercon_str = context_str(usercon);
if (!usercon_str) {
usercon_str2 = context_str(usercon);
if (!usercon_str2) {
context_free(usercon);
rc = -1;
goto out;
}
/* check whether usercon is already in reachable */
if (is_in_reachable(*reachable, usercon_str)) {
if (is_in_reachable(*reachable, usercon_str2)) {
context_free(usercon);
start = end;
continue;
}
if (security_check_context(usercon_str) == 0) {
if (security_check_context(usercon_str2) == 0) {
new_reachable = realloc(*reachable, (*nreachable + 2) * sizeof(char *));
if (!new_reachable) {
context_free(usercon);
@ -278,7 +279,7 @@ static int get_context_user(FILE * fp,
goto out;
}
*reachable = new_reachable;
new_reachable[*nreachable] = strdup(usercon_str);
new_reachable[*nreachable] = strdup(usercon_str2);
if (new_reachable[*nreachable] == NULL) {
context_free(usercon);
rc = -1;

2
libselinux/src/query_user_context.c
View File

@ -115,7 +115,7 @@ int manual_user_enter_context(const char *user, char ** newcon)
int mls_enabled = is_selinux_mls_enabled();
context_t new_context; /* The new context chosen by the user */
char *user_context = NULL; /* String value of the user's context */
const char *user_context = NULL; /* String value of the user's context */
int done = 0; /* true if a valid sid has been obtained */
/* Initialize the context. How this is done depends on whether

2
policycoreutils/newrole/newrole.c
View File

@ -842,7 +842,7 @@ static int parse_command_line_arguments(int argc, char **argv, char *ttyn,
char *type_ptr = NULL; /* stores malloc'd data from get_default_type */
char *level_s = NULL; /* level spec'd by user in argv[] */
char *range_ptr = NULL;
char *new_con = NULL;
const char *new_con = NULL;
char *tty_con = NULL;
context_t context = NULL; /* manipulatable form of new_context */
const struct option long_options[] = {