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phyp: Fix too small buffer allocation in phypAttachDevice

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sizeof(domain->name) is the wrong thing. Instead of using strdup here
rewrite escape_specialcharacters to allocate the buffer itself.

Add a contains_specialcharacters to be used in phypOpen, as phypOpen is
not interested in the escaped version.
This commit is contained in:
Matthias Bolte 2011-04-09 11:59:10 +02:00
parent e13e1f4f5d
commit 28e938a9ec
1 changed files with 48 additions and 56 deletions
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104
src/phyp/phyp_driver.c
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@ -894,54 +894,61 @@ phypUUIDTable_Free(uuid_tablePtr uuid_table)
VIR_FREE(uuid_table);
}
static int
escape_specialcharacters(char *src, char *dst, size_t dstlen)
#define SPECIALCHARACTER_CASES \
case '&': case ';': case '`': case '@': case '"': case '|': case '*': \
case '?': case '~': case '<': case '>': case '^': case '(': case ')': \
case '[': case ']': case '{': case '}': case '$': case '%': case '#': \
case '\\': case '\n': case '\r': case '\t':
static bool
contains_specialcharacters(const char *src)
{
size_t len = strlen(src);
char temp_buffer[len];
unsigned int i = 0, j = 0;
size_t i = 0;
if (len == 0)
return -1;
return false;
for (i = 0; i < len; i++) {
switch (src[i]) {
case '&':
case ';':
case '`':
case '@':
case '"':
case '|':
case '*':
case '?':
case '~':
case '<':
case '>':
case '^':
case '(':
case ')':
case '[':
case ']':
case '{':
case '}':
case '$':
case '%':
case '#':
case '\\':
case '\n':
case '\r':
case '\t':
continue;
default:
temp_buffer[j] = src[i];
j++;
SPECIALCHARACTER_CASES
return true;
default:
continue;
}
}
temp_buffer[j] = '\0';
if (virStrcpy(dst, temp_buffer, dstlen) == NULL)
return -1;
return false;
}
return 0;
static char *
escape_specialcharacters(const char *src)
{
size_t len = strlen(src);
size_t i = 0, j = 0;
char *dst;
if (len == 0)
return NULL;
if (VIR_ALLOC_N(dst, len + 1) < 0) {
virReportOOMError();
return NULL;
}
for (i = 0; i < len; i++) {
switch (src[i]) {
SPECIALCHARACTER_CASES
continue;
default:
dst[j] = src[i];
j++;
}
}
dst[j] = '\0';
return dst;
}
static LIBSSH2_SESSION *
@ -1124,8 +1131,6 @@ phypOpen(virConnectPtr conn,
{
LIBSSH2_SESSION *session = NULL;
ConnectionData *connection_data = NULL;
char *string = NULL;
size_t len = 0;
int internal_socket;
uuid_tablePtr uuid_table = NULL;
phyp_driverPtr phyp_driver = NULL;
@ -1160,13 +1165,6 @@ phypOpen(virConnectPtr conn,
}
if (conn->uri->path) {
len = strlen(conn->uri->path) + 1;
if (VIR_ALLOC_N(string, len) < 0) {
virReportOOMError();
goto failure;
}
/* need to shift one byte in order to remove the first "/" of URI component */
if (conn->uri->path[0] == '/')
managed_system = strdup(conn->uri->path + 1);
@ -1186,7 +1184,7 @@ phypOpen(virConnectPtr conn,
if (char_ptr)
*char_ptr = '\0';
if (escape_specialcharacters(conn->uri->path, string, len) == -1) {
if (contains_specialcharacters(conn->uri->path)) {
PHYP_ERROR(VIR_ERR_INTERNAL_ERROR,
"%s",
_("Error parsing 'path'. Invalid characters."));
@ -1245,7 +1243,6 @@ phypOpen(virConnectPtr conn,
}
VIR_FREE(connection_data);
VIR_FREE(string);
return VIR_DRV_OPEN_ERROR;
}
@ -1950,14 +1947,9 @@ phypAttachDevice(virDomainPtr domain, const char *xml)
virBuffer buf = VIR_BUFFER_INITIALIZER;
char *domain_name = NULL;
if (VIR_ALLOC_N(domain_name, sizeof(domain->name)) < 0) {
virReportOOMError();
goto cleanup;
}
domain_name = escape_specialcharacters(domain->name);
if (escape_specialcharacters
(domain->name, domain_name, strlen(domain->name)) == -1) {
virReportOOMError();
if (domain_name == NULL) {
goto cleanup;
}