linux-kernel - [PATCH 1/1] Char: moxa, fix refcounting in moxa_poll

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: <1237109844-3866-1-git-send-email-jirislaby@gmail.com>
Date:	Sun, 15 Mar 2009 10:37:24 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Jan Yenya Kasprzak <kas@...muni.cz>, linux-kernel@...r.kernel.org,
	Jiri Slaby <jirislaby@...il.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: [PATCH 1/1] Char: moxa, fix refcounting in moxa_poll_port

Repost, sorry, scripts don't understand Reported-by.

--

There is missing tty_kref_put on some paths in moxa_poll_port,
although the reference is always taken. Fix it.

Signed-off-by: Jiri Slaby <jirislaby@...il.com>
Reported-by: Jan 'Yenya' Kasprzak <kas@...muni.cz>
Cc: Alan Cox <alan@...rguk.ukuu.org.uk>
---
 drivers/char/moxa.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c
index 8b0da97..4a4cab7 100644
--- a/drivers/char/moxa.c
+++ b/drivers/char/moxa.c
@@ -1486,11 +1486,11 @@ static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
 	}
 
 	if (!handle) /* nothing else to do */
-		return 0;
+		goto put;
 
 	intr = readw(ip); /* port irq status */
 	if (intr == 0)
-		return 0;
+		goto put;
 
 	writew(0, ip); /* ACK port */
 	ofsAddr = p->tableAddr;
@@ -1499,16 +1499,17 @@ static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
 				ofsAddr + HostStat);
 
 	if (!inited)
-		return 0;
+		goto put;
 
 	if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
 		tty_insert_flip_char(tty, 0, TTY_BREAK);
 		tty_schedule_flip(tty);
 	}
-	tty_kref_put(tty);
 
 	if (intr & IntrLine)
 		moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
+put:
+	tty_kref_put(tty);
 
 	return 0;
 }
-- 
1.6.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/