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net: Real fix for check_params users 

OK, last try: 8e4416af45 broke -net socket, ffad4116b9 tried to fix it
but broke error reporting of invalid parameters. So this patch widely
reverts ffad4116b9 again and intead fixes those callers of check_params
that originally suffered from overwritten buffers by using separate
ones.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
This commit is contained in:
Jan Kiszka 2009-05-08 12:34:17 +02:00 committed by Mark McLoughlin
parent cda94b2782
commit 0aa7a205c8
3 changed files with 28 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
net.c
View File

@ -1911,7 +1911,7 @@ int net_client_init(const char *device, const char *p)
uint8_t *macaddr; uint8_t *macaddr;
int idx = nic_get_free_idx(); int idx = nic_get_free_idx();
if (check_params(nic_params, p) < 0) { if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n", fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
buf, p); buf, p);
return -1; return -1;
@ -1962,7 +1962,7 @@ int net_client_init(const char *device, const char *p)
static const char * const slirp_params[] = { static const char * const slirp_params[] = {
"vlan", "name", "hostname", "restrict", "ip", NULL "vlan", "name", "hostname", "restrict", "ip", NULL
}; };
if (check_params(slirp_params, p) < 0) { if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n", fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
buf, p); buf, p);
return -1; return -1;
@ -2013,7 +2013,7 @@ int net_client_init(const char *device, const char *p)
}; };
char ifname[64]; char ifname[64];
if (check_params(tap_params, p) < 0) { if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n", fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
buf, p); buf, p);
return -1; return -1;
@ -2029,12 +2029,12 @@ int net_client_init(const char *device, const char *p)
#elif defined (_AIX) #elif defined (_AIX)
#else #else
if (!strcmp(device, "tap")) { if (!strcmp(device, "tap")) {
char ifname[64]; char ifname[64], chkbuf[64];
char setup_script[1024], down_script[1024]; char setup_script[1024], down_script[1024];
int fd; int fd;
vlan->nb_host_devs++; vlan->nb_host_devs++;
if (get_param_value(buf, sizeof(buf), "fd", p) > 0) { if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
if (check_params(fd_params, p) < 0) { if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n", fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
buf, p); buf, p);
return -1; return -1;
@ -2047,7 +2047,7 @@ int net_client_init(const char *device, const char *p)
static const char * const tap_params[] = { static const char * const tap_params[] = {
"vlan", "name", "ifname", "script", "downscript", NULL "vlan", "name", "ifname", "script", "downscript", NULL
}; };
if (check_params(tap_params, p) < 0) { if (check_params(chkbuf, sizeof(chkbuf), tap_params, p) < 0) {
fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n", fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
buf, p); buf, p);
return -1; return -1;
@ -2066,9 +2066,10 @@ int net_client_init(const char *device, const char *p)
} else } else
#endif #endif
if (!strcmp(device, "socket")) { if (!strcmp(device, "socket")) {
char chkbuf[64];
if (get_param_value(buf, sizeof(buf), "fd", p) > 0) { if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
int fd; int fd;
if (check_params(fd_params, p) < 0) { if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n", fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
buf, p); buf, p);
return -1; return -1;
@ -2081,7 +2082,7 @@ int net_client_init(const char *device, const char *p)
static const char * const listen_params[] = { static const char * const listen_params[] = {
"vlan", "name", "listen", NULL "vlan", "name", "listen", NULL
}; };
if (check_params(listen_params, p) < 0) { if (check_params(chkbuf, sizeof(chkbuf), listen_params, p) < 0) {
fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n", fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
buf, p); buf, p);
return -1; return -1;
@ -2091,7 +2092,7 @@ int net_client_init(const char *device, const char *p)
static const char * const connect_params[] = { static const char * const connect_params[] = {
"vlan", "name", "connect", NULL "vlan", "name", "connect", NULL
}; };
if (check_params(connect_params, p) < 0) { if (check_params(chkbuf, sizeof(chkbuf), connect_params, p) < 0) {
fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n", fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
buf, p); buf, p);
return -1; return -1;
@ -2101,7 +2102,7 @@ int net_client_init(const char *device, const char *p)
static const char * const mcast_params[] = { static const char * const mcast_params[] = {
"vlan", "name", "mcast", NULL "vlan", "name", "mcast", NULL
}; };
if (check_params(mcast_params, p) < 0) { if (check_params(chkbuf, sizeof(chkbuf), mcast_params, p) < 0) {
fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n", fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
buf, p); buf, p);
return -1; return -1;
@ -2122,7 +2123,7 @@ int net_client_init(const char *device, const char *p)
char vde_sock[1024], vde_group[512]; char vde_sock[1024], vde_group[512];
int vde_port, vde_mode; int vde_port, vde_mode;
if (check_params(vde_params, p) < 0) { if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n", fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
buf, p); buf, p);
return -1; return -1;

3
sysemu.h
View File

@ -270,7 +270,8 @@ void usb_info(Monitor *mon);
int get_param_value(char *buf, int buf_size, int get_param_value(char *buf, int buf_size,
const char *tag, const char *str); const char *tag, const char *str);
int check_params(const char * const *params, const char *str); int check_params(char *buf, int buf_size,
const char * const *params, const char *str);
void register_devices(void); void register_devices(void);

39
vl.c
View File

@ -1836,45 +1836,34 @@ int get_param_value(char *buf, int buf_size,
return 0; return 0;
} }
int check_params(const char * const *params, const char *str) int check_params(char *buf, int buf_size,
const char * const *params, const char *str)
{ {
int name_buf_size = 1;
const char *p; const char *p;
char *name_buf; int i;
int i, len;
int ret = 0;
for (i = 0; params[i] != NULL; i++) {
len = strlen(params[i]) + 1;
if (len > name_buf_size) {
name_buf_size = len;
}
}
name_buf = qemu_malloc(name_buf_size);
p = str; p = str;
while (*p != '\0') { while (*p != '\0') {
p = get_opt_name(name_buf, name_buf_size, p, '='); p = get_opt_name(buf, buf_size, p, '=');
if (*p != '=') { if (*p != '=') {
ret = -1; return -1;
break;
} }
p++; p++;
for(i = 0; params[i] != NULL; i++) for (i = 0; params[i] != NULL; i++) {
if (!strcmp(params[i], name_buf)) if (!strcmp(params[i], buf)) {
break; break;
}
}
if (params[i] == NULL) { if (params[i] == NULL) {
ret = -1; return -1;
break;
} }
p = get_opt_value(NULL, 0, p); p = get_opt_value(NULL, 0, p);
if (*p != ',') if (*p != ',') {
break; break;
}
p++; p++;
} }
return 0;
qemu_free(name_buf);
return ret;
} }
/***********************************************************/ /***********************************************************/
@ -2227,7 +2216,7 @@ int drive_init(struct drive_opt *arg, int snapshot, void *opaque)
"cache", "format", "serial", "werror", "cache", "format", "serial", "werror",
NULL }; NULL };
if (check_params(params, str) < 0) { if (check_params(buf, sizeof(buf), params, str) < 0) {
fprintf(stderr, "qemu: unknown parameter '%s' in '%s'\n", fprintf(stderr, "qemu: unknown parameter '%s' in '%s'\n",
buf, str); buf, str);
return -1; return -1;