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libdm: better error reporting from dm_split_lvm_name

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Report errors from all error paths correctly.
Validate passed args before dereferencing them.
This commit is contained in:
Zdenek Kabelac 2015-11-16 13:07:36 +01:00
parent 5d4f5873a9
commit 2a2487f02f
1 changed files with 8 additions and 3 deletions
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11
libdm/libdm-string.c
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@ -95,13 +95,18 @@ static char *_unquote(char *component)
int dm_split_lvm_name(struct dm_pool *mem, const char *dmname,
char **vgname, char **lvname, char **layer)
{
if (mem && !(*vgname = dm_pool_strdup(mem, dmname))) {
log_error("Failed to duplicate dmname.");
if (!vgname || !lvname || !layer) {
log_error(INTERNAL_ERROR "dm_split_lvm_name: vgname, lvname nor layer could be NULL.");
return 0;
}
if (!*vgname)
if (mem && (!dmname || !(*vgname = dm_pool_strdup(mem, dmname)))) {
log_error("Failed to duplicate lvm name.");
return 0;
} else if (!*vgname) {
log_error("Missing lvm name for split.");
return 0;
}
_unquote(*layer = _unquote(*lvname = _unquote(*vgname)));