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Add some more pointer validation

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Ensure _display_name() and _add_dep() would not deref NULL names.
Switch to use internal dm_basename().
This commit is contained in:
Zdenek Kabelac 2012-03-01 21:56:44 +00:00
parent e922a85c51
commit d102667b6d
2 changed files with 9 additions and 3 deletions
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1
WHATS_NEW_DM
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@ -1,5 +1,6 @@
Version 1.02.73 -
====================================
Add few pointer validation in dmsetup.
Support dm_task_get_driver_version() query without version string.
Log failure of pthread_join when cleaning unused threads in dmeventd.
Fix empty string warning logic in _find_config_str. (1.02.68)

11
tools/dmsetup.c
View File

@ -1869,6 +1869,9 @@ static int _display_name(CMD_ARGS)
{
char dev_name[PATH_MAX];
if (!names)
return 1;
if ((_dev_name_type == DN_BLK || _dev_name_type == DN_MAP) &&
dm_device_get_name((int) MAJOR(names->dev), (int) MINOR(names->dev),
_dev_name_type == DN_BLK, dev_name, PATH_MAX))
@ -2203,7 +2206,8 @@ static void _display_tree_walk_children(struct dm_tree_node *node,
static int _add_dep(CMD_ARGS)
{
if (!dm_tree_add_dev(_dtree, (unsigned) MAJOR(names->dev), (unsigned) MINOR(names->dev)))
if (names &&
!dm_tree_add_dev(_dtree, (unsigned) MAJOR(names->dev), (unsigned) MINOR(names->dev)))
return 0;
return 1;
@ -3417,7 +3421,8 @@ static int _process_options(const char *options)
static int _process_switches(int *argc, char ***argv, const char *dev_dir)
{
char *base, *namebase, *s;
const char *base;
char *namebase, *s;
static int ind;
int c, r;
@ -3482,7 +3487,7 @@ static int _process_switches(int *argc, char ***argv, const char *dev_dir)
fprintf(stderr, "Failed to duplicate name.\n");
return 0;
}
base = basename(namebase);
base = dm_basename(namebase);
if (!strcmp(base, "devmap_name")) {
free(namebase);