commit: 3bec60d511179853138836ae6e1b61fe34d9235f From: Tejun Heo <[email protected]> Date: Wed, 27 Feb 2013 17:04:04 -0800 Subject: firewire: add minor number range check to fw_device_init()
fw_device_init() didn't check whether the allocated minor number isn't too large. Fail if it goes overflows MINORBITS. Signed-off-by: Tejun Heo <[email protected]> Suggested-by: Stefan Richter <[email protected]> Acked-by: Stefan Richter <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> --- drivers/firewire/core-device.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c index 3873d53..af3e8aa 100644 --- a/drivers/firewire/core-device.c +++ b/drivers/firewire/core-device.c @@ -1020,6 +1020,10 @@ static void fw_device_init(struct work_struct *work) ret = idr_pre_get(&fw_device_idr, GFP_KERNEL) ? idr_get_new(&fw_device_idr, device, &minor) : -ENOMEM; + if (minor >= 1 << MINORBITS) { + idr_remove(&fw_device_idr, minor); + minor = -ENOSPC; + } up_write(&fw_device_rwsem); if (ret < 0) -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
