lkml.org 
[lkml]   [2013]   [Feb]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 12.5/62] 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 <tj@kernel.org>
Suggested-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: stable@vger.kernel.org
---
drivers/firewire/core-device.c | 4 ++++
1 file changed, 4 insertions(+)

--- a/drivers/firewire/core-device.c
+++ b/drivers/firewire/core-device.c
@@ -1020,6 +1020,10 @@ static void fw_device_init(struct work_s
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)

\
 
 \ /
  Last update: 2013-02-04 18:42    [W:0.486 / U:6.820 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site