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hush: plug leak in run_pipe(). NOMMU only.

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This commit is contained in:
Denis Vlasenko 2009-04-08 16:40:34 +00:00
parent 08daf564ae
commit cc90f44402
1 changed files with 42 additions and 10 deletions
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52
shell/hush.c
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@ -214,6 +214,7 @@ static void debug_print_strings(const char *prefix, char **vv)
/*
* Leak hunting. Use hush_leaktool.sh for post-processing.
*/
//#define FOR_HUSH_LEAKTOOL
#ifdef FOR_HUSH_LEAKTOOL
static void *xxmalloc(int lineno, size_t size)
{
@ -247,12 +248,24 @@ static void xxfree(void *ptr)
#define ERR_PTR ((void*)(long)1)
static const char hush_version_str[] ALIGN1 = "HUSH_VERSION="BB_VER;
#define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n"
#define SPECIAL_VAR_SYMBOL 3
static const char hush_version_str[] ALIGN1 = "HUSH_VERSION="BB_VER;
/* This supports saving pointers malloced in vfork child,
* to be freed in the parent. One pointer is saved in
* G.argv_from_re_execing global var instead. TODO: unify.
*/
#if !BB_MMU
typedef struct nommu_save_t {
char **new_env;
char **old_env;
char **argv;
} nommu_save_t;
#endif
/* The descrip member of this structure is only used to make
* debugging output pretty */
static const struct {
@ -729,6 +742,16 @@ static char **add_strings_to_strings(char **strings, char **add, int need_to_dup
v[count1 + i] = (need_to_dup ? xstrdup(add[i]) : add[i]);
return v;
}
#ifdef FOR_HUSH_LEAKTOOL
static char **xx_add_strings_to_strings(int lineno, char **strings, char **add, int need_to_dup)
{
char **ptr = add_strings_to_strings(strings, add, need_to_dup);
fdprintf(2, "line %d: add_strings_to_strings %p\n", lineno, ptr);
return ptr;
}
#define add_strings_to_strings(strings, add, need_to_dup) \
xx_add_strings_to_strings(__LINE__, strings, add, need_to_dup)
#endif
static char **add_string_to_strings(char **strings, char *add)
{
@ -737,6 +760,16 @@ static char **add_string_to_strings(char **strings, char *add)
v[1] = NULL;
return add_strings_to_strings(strings, v, /*dup:*/ 0);
}
#ifdef FOR_HUSH_LEAKTOOL
static char **xx_add_string_to_strings(int lineno, char **strings, char *add)
{
char **ptr = add_string_to_strings(strings, add);
fdprintf(2, "line %d: add_string_to_strings %p\n", lineno, ptr);
return ptr;
}
#define add_string_to_strings(strings, add) \
xx_add_string_to_strings(__LINE__, strings, add)
#endif
static void putenv_all(char **strings)
{
@ -2452,13 +2485,7 @@ static void free_pipe_list(struct pipe *head, int indent)
}
#if !BB_MMU
typedef struct nommu_save_t {
char **new_env;
char **old_env;
char **argv;
} nommu_save_t;
#else
#if BB_MMU
#define pseudo_exec_argv(nommu_save, argv, assignment_cnt, argv_expanded) \
pseudo_exec_argv(argv, assignment_cnt, argv_expanded)
#define pseudo_exec(nommu_save, command, argv_expanded) \
@ -2974,7 +3001,9 @@ static int run_pipe(struct pipe *pi)
restore_redirects(squirrel);
free_strings_and_unsetenv(new_env, 1);
putenv_all(old_env);
free(old_env); /* not free_strings()! */
/* Free the pointers, but the strings themselves
* are in environ now, don't use free_strings! */
free(old_env);
clean_up_and_ret1:
free(argv_expanded);
IF_HAS_KEYWORDS(if (pi->pi_inverted) rcode = !rcode;)
@ -3072,6 +3101,9 @@ static int run_pipe(struct pipe *pi)
free(nommu_save.argv);
free_strings_and_unsetenv(nommu_save.new_env, 1);
putenv_all(nommu_save.old_env);
/* Free the pointers, but the strings themselves
* are in environ now, don't use free_strings! */
free(nommu_save.old_env);
#endif
free(argv_expanded);
argv_expanded = NULL;