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Clean up sandbox structures a bit

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Drop pindex,pindex2 as unused.

Admit a type to avoid using a void*
This commit is contained in:
Nick Mathewson
2014-04-16 12:24:08 -04:00
parent 6807b76a5e
commit f268101a61
2 changed files with 21 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/common/sandbox.c
+20 -22
View File
@@ -198,7 +198,7 @@ sb_execve(scmp_filter_ctx ctx, sandbox_cfg_t *filter)
// for each dynamic parameter filters
for (elem = filter; elem != NULL; elem = elem->next) {
smp_param_t *param = (smp_param_t*) elem->param;
smp_param_t *param = elem->param;
if (param != NULL && param->prot == 1 && param->syscall
== SCMP_SYS(execve)) {
@@ -899,7 +899,8 @@ prot_strings(scmp_filter_ctx ctx, sandbox_cfg_t* cfg)
// get total number of bytes required to mmap. (Overestimate.)
for (el = cfg; el != NULL; el = el->next) {
pr_mem_size += strlen((char*) ((smp_param_t*)el->param)->value) + 1;
pr_mem_size += strlen((char*) el->param->value) + 1;
}
// allocate protected memory with MALLOC_MP_LIM canary
@@ -919,7 +920,7 @@ prot_strings(scmp_filter_ctx ctx, sandbox_cfg_t* cfg)
// change el value pointer to protected
for (el = cfg; el != NULL; el = el->next) {
char *param_val = (char*)((smp_param_t *)el->param)->value;
char *param_val = (char*)(el->param)->value;
size_t param_size = strlen(param_val) + 1;
void *location = strmap_get(locations, param_val);
@@ -927,11 +928,11 @@ prot_strings(scmp_filter_ctx ctx, sandbox_cfg_t* cfg)
if (location) {
// We already interned this string.
{
void *old_val = (void *) ((smp_param_t*)el->param)->value;
void *old_val = (void *) el->param->value;
tor_free(old_val);
}
((smp_param_t*)el->param)->value = (intptr_t) location;
((smp_param_t*)el->param)->prot = 1;
el->param->value = (intptr_t) location;
el->param->prot = 1;
} else if (pr_mem_left >= param_size) {
// copy to protected
@@ -939,11 +940,11 @@ prot_strings(scmp_filter_ctx ctx, sandbox_cfg_t* cfg)
// re-point el parameter to protected
{
void *old_val = (void *) ((smp_param_t*)el->param)->value;
void *old_val = (void *) el->param->value;
tor_free(old_val);
}
((smp_param_t*)el->param)->value = (intptr_t) pr_mem_next;
((smp_param_t*)el->param)->prot = 1;
el->param->value = (intptr_t) pr_mem_next;
el->param->prot = 1;
strmap_set(locations, pr_mem_next, pr_mem_next);
@@ -1025,17 +1026,14 @@ prot_strings(scmp_filter_ctx ctx, sandbox_cfg_t* cfg)
* point.
*/
static sandbox_cfg_t*
new_element2(int syscall, int index, int index2, intptr_t value, intptr_t value2)
new_element2(int syscall, intptr_t value, intptr_t value2)
{
smp_param_t *param = NULL;
sandbox_cfg_t *elem = tor_malloc_zero(sizeof(sandbox_cfg_t));
elem->param = tor_malloc_zero(sizeof(smp_param_t));
param = elem->param = tor_malloc_zero(sizeof(smp_param_t));
param = elem->param;
param->syscall = syscall;
param->pindex = index;
param->pindex2 = index2;
param->value = value;
param->value2 = value2;
param->prot = 0;
@@ -1044,9 +1042,9 @@ new_element2(int syscall, int index, int index2, intptr_t value, intptr_t value2
}
static sandbox_cfg_t*
new_element(int syscall, int index, intptr_t value)
new_element(int syscall, intptr_t value)
{
return new_element2(syscall, index, -1, value, 0);
return new_element2(syscall, value, 0);
}
#ifdef __NR_stat64
@@ -1060,7 +1058,7 @@ sandbox_cfg_allow_stat_filename(sandbox_cfg_t **cfg, char *file)
{
sandbox_cfg_t *elem = NULL;
elem = new_element(SCMP_stat, 0, (intptr_t)(void*) file);
elem = new_element(SCMP_stat, (intptr_t)(void*) file);
if (!elem) {
log_err(LD_BUG,"(Sandbox) failed to register parameter!");
return -1;
@@ -1099,7 +1097,7 @@ sandbox_cfg_allow_open_filename(sandbox_cfg_t **cfg, char *file)
{
sandbox_cfg_t *elem = NULL;
elem = new_element(SCMP_SYS(open), 0, (intptr_t)(void *) file);
elem = new_element(SCMP_SYS(open), (intptr_t)(void *) file);
if (!elem) {
log_err(LD_BUG,"(Sandbox) failed to register parameter!");
return -1;
@@ -1116,7 +1114,7 @@ sandbox_cfg_allow_rename(sandbox_cfg_t **cfg, char *file1, char *file2)
{
sandbox_cfg_t *elem = NULL;
elem = new_element2(SCMP_SYS(rename), 0, 1,
elem = new_element2(SCMP_SYS(rename),
(intptr_t)(void *) file1,
(intptr_t)(void *) file2);
@@ -1129,7 +1127,7 @@ sandbox_cfg_allow_rename(sandbox_cfg_t **cfg, char *file1, char *file2)
*cfg = elem;
/* For interning */
elem = new_element(-1, 0, (intptr_t)(void*)tor_strdup(file2));
elem = new_element(-1, (intptr_t)(void*)tor_strdup(file2));
if (!elem) {
log_err(LD_BUG,"(Sandbox) failed to register parameter!");
return -1;
@@ -1167,7 +1165,7 @@ sandbox_cfg_allow_openat_filename(sandbox_cfg_t **cfg, char *file)
{
sandbox_cfg_t *elem = NULL;
elem = new_element(SCMP_SYS(openat), 1, (intptr_t)(void *) file);
elem = new_element(SCMP_SYS(openat), (intptr_t)(void *) file);
if (!elem) {
log_err(LD_BUG,"(Sandbox) failed to register parameter!");
return -1;
@@ -1206,7 +1204,7 @@ sandbox_cfg_allow_execve(sandbox_cfg_t **cfg, const char *com)
{
sandbox_cfg_t *elem = NULL;
elem = new_element(SCMP_SYS(execve), 1, (intptr_t)(void *) com);
elem = new_element(SCMP_SYS(execve), (intptr_t)(void *) com);
if (!elem) {
log_err(LD_BUG,"(Sandbox) failed to register parameter!");
return -1;
src/common/sandbox.h
+1 -5
View File
@@ -65,10 +65,6 @@ typedef struct smp_param {
/** syscall associated with parameter. */
int syscall;
/** parameter index. */
int pindex;
/** parameter index, second one. */
int pindex2;
/** parameter value. */
intptr_t value;
/** parameter value, second argument. */
@@ -89,7 +85,7 @@ struct sandbox_cfg_elem {
SB_IMPL implem;
/** Configuration parameter. */
void *param;
smp_param_t *param;
/** Next element of the configuration*/
struct sandbox_cfg_elem *next;