From: Szymon Janc Date: Fri, 8 Jun 2012 09:33:33 +0000 (+0200) Subject: Bluetooth: Fix using uninitialized option in RFCMode X-Git-Tag: v3.5-rc5~17^2~26^2~6^2~3 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8f321f853ea33330c7141977cd34804476e2e07e;p=profile%2Fwearable%2Fplatform%2Fkernel%2Flinux-4.9-exynos9110.git Bluetooth: Fix using uninitialized option in RFCMode If remote device sends bogus RFC option with invalid length, undefined options values are used. Fix this by using defaults when remote misbehaves. This also fixes the following warning reported by gcc 4.7.0: net/bluetooth/l2cap_core.c: In function 'l2cap_config_rsp': net/bluetooth/l2cap_core.c:3302:13: warning: 'rfc.max_pdu_size' may be used uninitialized in this function [-Wmaybe-uninitialized] net/bluetooth/l2cap_core.c:3266:24: note: 'rfc.max_pdu_size' was declared here net/bluetooth/l2cap_core.c:3298:25: warning: 'rfc.monitor_timeout' may be used uninitialized in this function [-Wmaybe-uninitialized] net/bluetooth/l2cap_core.c:3266:24: note: 'rfc.monitor_timeout' was declared here net/bluetooth/l2cap_core.c:3297:25: warning: 'rfc.retrans_timeout' may be used uninitialized in this function [-Wmaybe-uninitialized] net/bluetooth/l2cap_core.c:3266:24: note: 'rfc.retrans_timeout' was declared here net/bluetooth/l2cap_core.c:3295:2: warning: 'rfc.mode' may be used uninitialized in this function [-Wmaybe-uninitialized] net/bluetooth/l2cap_core.c:3266:24: note: 'rfc.mode' was declared here Signed-off-by: Szymon Janc Signed-off-by: Gustavo Padovan --- diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index 8394e36..4554e80 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -2915,12 +2915,14 @@ static void l2cap_conf_rfc_get(struct l2cap_chan *chan, void *rsp, int len) while (len >= L2CAP_CONF_OPT_SIZE) { len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); - switch (type) { - case L2CAP_CONF_RFC: - if (olen == sizeof(rfc)) - memcpy(&rfc, (void *)val, olen); - goto done; - } + if (type != L2CAP_CONF_RFC) + continue; + + if (olen != sizeof(rfc)) + break; + + memcpy(&rfc, (void *)val, olen); + goto done; } /* Use sane default values in case a misbehaving remote device