* [PATCH 1/2] Char: riscom8, fix tty refcnt
@ 2009-09-06 21:10 Jiri Slaby
2009-09-06 21:10 ` [PATCH 2/2] USB: serial/mct_u232, " Jiri Slaby
0 siblings, 1 reply; 2+ messages in thread
From: Jiri Slaby @ 2009-09-06 21:10 UTC (permalink / raw)
To: gregkh; +Cc: akpm, linux-serial, linux-kernel, Jiri Slaby
Stanse found a tty refcnt leak on one fail path in rc_transmit.
Fix that by jumping to the 'out' label.
http://stanse.fi.muni.cz/
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
---
drivers/char/riscom8.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/char/riscom8.c b/drivers/char/riscom8.c
index 3c7cf2c..3cfa22d 100644
--- a/drivers/char/riscom8.c
+++ b/drivers/char/riscom8.c
@@ -467,7 +467,7 @@ static void rc_transmit(struct riscom_board const *bp)
rc_out(bp, CD180_CCR, CCR_CORCHG2);
port->break_length = 0;
}
- return;
+ goto out;
}
count = CD180_NFIFO;
--
1.6.4.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [PATCH 2/2] USB: serial/mct_u232, fix tty refcnt
2009-09-06 21:10 [PATCH 1/2] Char: riscom8, fix tty refcnt Jiri Slaby
@ 2009-09-06 21:10 ` Jiri Slaby
0 siblings, 0 replies; 2+ messages in thread
From: Jiri Slaby @ 2009-09-06 21:10 UTC (permalink / raw)
To: gregkh; +Cc: akpm, linux-serial, linux-kernel, Jiri Slaby
Stanse found a tty refcnt leak in read_int_callback. In fact
it's handled wrong altogether. tty_port_tty_get can return NULL
and it's not checked in that manner.
Fix that by checking the tty_port_tty_get retval and put tty kref
properly.
http://stanse.fi.muni.cz/
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
---
drivers/usb/serial/mct_u232.c | 9 ++++++---
1 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c
index d501aef..ad4998b 100644
--- a/drivers/usb/serial/mct_u232.c
+++ b/drivers/usb/serial/mct_u232.c
@@ -566,10 +566,13 @@ static void mct_u232_read_int_callback(struct urb *urb)
* Work-a-round: handle the 'usual' bulk-in pipe here
*/
if (urb->transfer_buffer_length > 2) {
- tty = tty_port_tty_get(&port->port);
if (urb->actual_length) {
- tty_insert_flip_string(tty, data, urb->actual_length);
- tty_flip_buffer_push(tty);
+ tty = tty_port_tty_get(&port->port);
+ if (tty) {
+ tty_insert_flip_string(tty, data,
+ urb->actual_length);
+ tty_flip_buffer_push(tty);
+ }
tty_kref_put(tty);
}
goto exit;
--
1.6.4.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
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