linux-kernel - [PATCH 4.9 048/191] tty: n_gsm: Fix bogus i++ in gsm_data

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200629154007.2495120-49-sashal@kernel.org>
Date:   Mon, 29 Jun 2020 11:37:44 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Gregory CLEMENT <gregory.clement@...tlin.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 048/191] tty: n_gsm: Fix bogus i++ in gsm_data_kick

From: Gregory CLEMENT <gregory.clement@...tlin.com>

[ Upstream commit 4dd31f1ffec6c370c3c2e0c605628bf5e16d5c46 ]

When submitting the previous fix "tty: n_gsm: Fix waking up upper tty
layer when room available". It was suggested to switch from a while to
a for loop, but when doing it, there was a remaining bogus i++.

This patch removes this i++ and also reorganizes the code making it more
compact.

Fixes: e1eaea46bb40 ("tty: n_gsm line discipline")
Signed-off-by: Gregory CLEMENT <gregory.clement@...tlin.com>
Link: https://lore.kernel.org/r/20200518084517.2173242-3-gregory.clement@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/tty/n_gsm.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 56716f5250303..1ab9bd4335421 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -719,17 +719,9 @@ static void gsm_data_kick(struct gsm_mux *gsm, struct gsm_dlci *dlci)
 		} else {
 			int i = 0;
 
-			for (i = 0; i < NUM_DLCI; i++) {
-				struct gsm_dlci *dlci;
-
-				dlci = gsm->dlci[i];
-				if (dlci == NULL) {
-					i++;
-					continue;
-				}
-
-				tty_port_tty_wakeup(&dlci->port);
-			}
+			for (i = 0; i < NUM_DLCI; i++)
+				if (gsm->dlci[i])
+					tty_port_tty_wakeup(&gsm->dlci[i]->port);
 		}
 	}
 }
-- 
2.25.1