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authorJiri Slaby <jslaby@suse.cz>2011-03-23 10:48:36 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2011-04-19 14:43:01 -0700
commita9dccddb60913056bcadaeeacfe0395447fd2472 (patch)
tree8f1fccdba560437d52040677347e7c2f40c18626 /drivers/tty
parent6716671d8c1c07a8072098764d1b7cbfef7412ad (diff)
TTY: plug in deinitialize_tty_struct
Used the newly introduced deinitialize_tty_struct to properly shut down ldisc. It is intended to fix the Julian's reported problem. He reports that kmemleak checker warns about memory leak: unreferenced object 0xc0e19860 (size 8): comm cat, pid 1226, jiffies 4294919464 (age 287.476s) hex dump (first 8 bytes): 44 de 2d c1 01 00 00 00 D.-..... backtrace: [<c1065a74>] create_object+0x109/0x1ad [<c1063d2b>] kmem_cache_alloc+0x60/0x68 [<c113505c>] tty_ldisc_get+0x54/0x76 [<c11358c9>] tty_ldisc_init+0xa/0x20 [<c1130ab4>] initialize_tty_struct+0x2d/0x1ac [<c1130c8c>] tty_init_dev+0x59/0x10d [<c113136d>] tty_open+0x24a/0x3a2 ... Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Reported-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/pty.c6
-rw-r--r--drivers/tty/tty_io.c5
2 files changed, 7 insertions, 4 deletions
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index b25d6c4014a..21bddf359db 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -304,7 +304,7 @@ static int pty_install(struct tty_driver *driver, struct tty_struct *tty)
the easy way .. */
retval = tty_init_termios(tty);
if (retval)
- goto err_module_put;
+ goto err_deinit_tty;
retval = tty_init_termios(o_tty);
if (retval)
@@ -327,7 +327,8 @@ static int pty_install(struct tty_driver *driver, struct tty_struct *tty)
return 0;
err_free_termios:
tty_free_termios(tty);
-err_module_put:
+err_deinit_tty:
+ deinitialize_tty_struct(o_tty);
module_put(o_tty->driver->owner);
err_free_tty:
free_tty_struct(o_tty);
@@ -592,6 +593,7 @@ static int pty_unix98_install(struct tty_driver *driver, struct tty_struct *tty)
pty_count++;
return 0;
err_free_mem:
+ deinitialize_tty_struct(o_tty);
kfree(o_tty->termios);
kfree(tty->termios);
module_put(o_tty->driver->owner);
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index f5dd23520fe..8540f2bab9c 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -1399,7 +1399,7 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx,
retval = tty_driver_install_tty(driver, tty);
if (retval < 0)
- goto err_free_tty;
+ goto err_deinit_tty;
/*
* Structures all installed ... call the ldisc open routines.
@@ -1411,7 +1411,8 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx,
goto err_release_tty;
return tty;
-err_free_tty:
+err_deinit_tty:
+ deinitialize_tty_struct(tty);
free_tty_struct(tty);
err_module_put:
module_put(driver->owner);