linux-kernel - [PATCH 1/4] TTY: drop driver reference in tty

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 for Android: free password hash cracker in your pocket

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

Date:	Wed, 12 Oct 2011 11:32:42 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	gregkh@...e.de
Cc:	linux-kernel@...r.kernel.org, jirislaby@...il.com,
	stable@...nel.org, Sukadev Bhattiprolu <sukadev@...ibm.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: [PATCH 1/4] TTY: drop driver reference in tty_open fail path

When tty_driver_lookup_tty fails in tty_open, we forget to drop a
reference to the tty driver. This was added by commit 4a2b5fddd5 (Move
tty lookup/reopen to caller).

Fix that by adding tty_driver_kref_put to the fail path.

I will refactor the code later. This is for the ease of backporting to
stable.

Introduced-in: v2.6.28-rc2
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: stable@...nel.org
Cc: Sukadev Bhattiprolu <sukadev@...ibm.com>
Cc: Alan Cox <alan@...rguk.ukuu.org.uk>
Cc: Greg Kroah-Hartman <gregkh@...e.de>
---
 drivers/tty/tty_io.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 4f1fc81..54b3cc4 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -1872,6 +1872,7 @@ got_driver:
 		if (IS_ERR(tty)) {
 			tty_unlock();
 			mutex_unlock(&tty_mutex);
+			tty_driver_kref_put(driver);
 			return PTR_ERR(tty);
 		}
 	}
-- 
1.7.7


--
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/