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| author | Jiri Slaby <jirislaby@gmail.com> | 2007-10-18 03:06:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-18 14:37:27 -0700 |
| commit | 4384a3fae10c1badb859d2c98a6d2944b14609f6 (patch) | |
| tree | 08359a5b77d7535ddf80fddbd641f665213cc2af /drivers/char/rocket.c | |
| parent | 57fedc7ae5f712c9c24f5baf30a0fbf38c1bda20 (diff) | |
| download | linux-4384a3fae10c1badb859d2c98a6d2944b14609f6.tar.gz | |
Char: rocket, remove potential leak in module_init
if (controller && !request_region) then we leaked a tty driver struct, fix it by adding function deinit tail with goto-ing into it (and from other fail paths too) Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/rocket.c')
| -rw-r--r-- | drivers/char/rocket.c | 34 |
1 files changed, 20 insertions, 14 deletions
diff --git a/drivers/char/rocket.c b/drivers/char/rocket.c index ffcd8b4fbf99..abe3ad0f6195 100644 --- a/drivers/char/rocket.c +++ b/drivers/char/rocket.c @@ -2359,14 +2359,14 @@ static const struct tty_operations rocket_ops = { */ static int __init rp_init(void) { - int retval, pci_boards_found, isa_boards_found, i; + int ret = -ENOMEM, pci_boards_found, isa_boards_found, i; printk(KERN_INFO "RocketPort device driver module, version %s, %s\n", ROCKET_VERSION, ROCKET_DATE); rocket_driver = alloc_tty_driver(MAX_RP_PORTS); if (!rocket_driver) - return -ENOMEM; + goto err; /* * If board 1 is non-zero, there is at least one ISA configured. If controller is @@ -2381,8 +2381,11 @@ static int __init rp_init(void) /* If an ISA card is configured, reserve the 4 byte IO space for the Mudbac controller */ if (controller && (!request_region(controller, 4, "Comtrol RocketPort"))) { - printk(KERN_INFO "Unable to reserve IO region for first configured ISA RocketPort controller 0x%lx. Driver exiting \n", controller); - return -EBUSY; + printk(KERN_ERR "Unable to reserve IO region for first " + "configured ISA RocketPort controller 0x%lx. " + "Driver exiting\n", controller); + ret = -EBUSY; + goto err_tty; } /* Store ISA variable retrieved from command line or .conf file. */ @@ -2423,11 +2426,10 @@ static int __init rp_init(void) #endif tty_set_operations(rocket_driver, &rocket_ops); - retval = tty_register_driver(rocket_driver); - if (retval < 0) { - printk(KERN_INFO "Couldn't install tty RocketPort driver (error %d)\n", -retval); - put_tty_driver(rocket_driver); - return -1; + ret = tty_register_driver(rocket_driver); + if (ret < 0) { + printk(KERN_ERR "Couldn't install tty RocketPort driver\n"); + goto err_tty; } #ifdef ROCKET_DEBUG_OPEN @@ -2454,14 +2456,18 @@ static int __init rp_init(void) max_board = pci_boards_found + isa_boards_found; if (max_board == 0) { - printk(KERN_INFO "No rocketport ports found; unloading driver.\n"); - del_timer_sync(&rocket_timer); - tty_unregister_driver(rocket_driver); - put_tty_driver(rocket_driver); - return -ENXIO; + printk(KERN_ERR "No rocketport ports found; unloading driver\n"); + ret = -ENXIO; + goto err_ttyu; } return 0; +err_ttyu: + tty_unregister_driver(rocket_driver); +err_tty: + put_tty_driver(rocket_driver); +err: + return ret; } |