Cumulative patch from commit 32b62704fac6af74f60b2effb173474e11ff089d

32b6270 Android: Fix ARRAY_SIZE() compilation
7617388 Interworking: Report STATUS:sp_type even if domain is not configured
c20bc9d P2P: Remove compiler warning without CONFIG_IEEE80211N
ca9bc5b P2P: Add VHT support
20ea1ca P2P: Add VHT parameter to P2P operations
53cfad4 nl80211: Mark VHT 80 MHz channels
f2112b2 wpa_supplicant: Add CONFIG_IEEE80211AC
6b02335 hostapd: Mask out not-supported VHT capabilities
7f0303d hostapd: Verify VHT 160/80+80 MHz driver support
c781eb8 hostapd: Verify VHT capabilities are supported by driver
b29b012 Fix some VHT Capabilities definitions
7066a8e hostapd: Fix wrong VHT configuration capabilities flags
6651f1f nl80211: Use max tx power from regulatory domain
7ac3616 nl80211: Replace perror() and printf() calls with wpa_printf()
4d9fb08 WPS: Clear known_wps_freq in addition to after_wps
d20c340 Interworking: Clear known_wps_freq for network selection
f3be6ee tests: Allow test case descriptions to be written into database
1bd05d0 Interworking: Force normal scan for network selection
51e9f22 P2P: Add option to allow additional client channels
556b30d P2P: Add option to remove channels from GO use
e7ecab4 Use ARRAY_SIZE() macro
39044a7 Introduce ARRAY_SIZE() macro
2e94624 DFS: Handle radar event when CAC actived correctly
5eaf240 DFS: Fix overlapped() function to check only DFS channels
345276a DFS: Adjust center freq correctly for VHT20/VHT40
1dc17db DFS: Fix available channels list for VHT80
34068ac nl80211: Add debug prints on nl_recvmsgs() failure
10b8592 nl80211: Make eloop sockets non-blocking
5f65e9f nl80211: Abstract handling of sockets on eloop
e8d1168 nl80211: Register for IBSS auth frames before eloop
03610ad Clean up get_seqnum() use for IPN
29179b8 Stop ctrl_iface monitor send loop on reinit failure
a2a535f Remove unnecessary wpa_s->conf checks
3318376 Add explicit buffer length checks for p2p_build_wps_ie()
0f01201 Verify that readlink() did not truncate result
f5eb9da nl80211: Clean up if_add() for hostapd use
a288da6 OpenSSL: Fix memory leak on error path
6cb4f11 nl80211: Fix strerror() value in P2P Dev debug messages
35f8363 DFS: Add forgotten break statement
2f243b8 Remove os_strncpy()
24f051e Replace remainining strncpy() uses with strlcpy()
41c526f P2P: Fix snprintf buffer length for group ifname backup

Change-Id: I2e1506cb9219a5a37efbb2ae0dc180fb081c809f
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/src/drivers/linux_ioctl.c b/src/drivers/linux_ioctl.c
index 4380428..837971d 100644
--- a/src/drivers/linux_ioctl.c
+++ b/src/drivers/linux_ioctl.c
@@ -204,11 +204,14 @@
 int linux_br_get(char *brname, const char *ifname)
 {
 	char path[128], brlink[128], *pos;
+	ssize_t res;
+
 	os_snprintf(path, sizeof(path), "/sys/class/net/%s/brport/bridge",
 		    ifname);
-	os_memset(brlink, 0, sizeof(brlink));
-	if (readlink(path, brlink, sizeof(brlink) - 1) < 0)
+	res = readlink(path, brlink, sizeof(brlink));
+	if (res < 0 || (size_t) res >= sizeof(brlink))
 		return -1;
+	brlink[res] = '\0';
 	pos = os_strrchr(brlink, '/');
 	if (pos == NULL)
 		return -1;