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authorTom Gundersen <teg@jklm.no>2015-06-01 16:28:58 +0200
committerTom Gundersen <teg@jklm.no>2015-06-01 16:28:58 +0200
commitccc1002a1c510b7d4631833eaf60225f028f2280 (patch)
treebbe5e21d30d164c3fc2f2c2a5cde08092d323d59 /src/libsystemd/sd-device/device-private.c
parentc521a430fd6027d55f96516bc2f7570f5997e137 (diff)
sd-device: ensure update_properties_buf() is a noop on failure
Don't clobber the sd_device struct, and don't leak memory when memory allocation fails.
Diffstat (limited to 'src/libsystemd/sd-device/device-private.c')
-rw-r--r--src/libsystemd/sd-device/device-private.c26
1 files changed, 16 insertions, 10 deletions
diff --git a/src/libsystemd/sd-device/device-private.c b/src/libsystemd/sd-device/device-private.c
index deb8efd05d..2e60433246 100644
--- a/src/libsystemd/sd-device/device-private.c
+++ b/src/libsystemd/sd-device/device-private.c
@@ -636,9 +636,10 @@ int device_new_from_nulstr(sd_device **ret, uint8_t *nulstr, size_t len) {
static int device_update_properties_bufs(sd_device *device) {
const char *val, *prop;
- uint8_t *buf_nulstr = NULL;
+ _cleanup_free_ char **buf_strv = NULL;
+ _cleanup_free_ uint8_t *buf_nulstr = NULL;
size_t allocated_nulstr = 0;
- size_t nulstr_len = 0, num = 0, i;
+ size_t nulstr_len = 0, num = 0, i = 0;
assert(device);
@@ -659,20 +660,25 @@ static int device_update_properties_bufs(sd_device *device) {
++num;
}
- free(device->properties_nulstr);
- device->properties_nulstr = buf_nulstr;
- device->properties_nulstr_len = nulstr_len;
+ /* build buf_strv from buf_nulstr */
+ buf_strv = new0(char *, num + 1);
+ if (!buf_strv)
+ return -ENOMEM;
- /* build strv from buf_nulstr */
- free(device->properties_strv);
- device->properties_strv = new0(char *, num + 1);
- i = 0;
NULSTR_FOREACH(val, (char*) buf_nulstr) {
- device->properties_strv[i] = (char *) val;
+ buf_strv[i] = (char *) val;
assert(i < num);
i++;
}
+ free(device->properties_nulstr);
+ device->properties_nulstr = buf_nulstr;
+ buf_nulstr = NULL;
+ device->properties_nulstr_len = nulstr_len;
+ free(device->properties_strv);
+ device->properties_strv = buf_strv;
+ buf_strv = NULL;
+
device->properties_buf_outdated = false;
return 0;