This is a note to let you know that I've just added the patch titled
firewire: add minor number range check to fw_device_init()
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
firewire-add-minor-number-range-check-to-fw_device_init.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3bec60d511179853138836ae6e1b61fe34d9235f Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@xxxxxxxxxx>
Date: Wed, 27 Feb 2013 17:04:04 -0800
Subject: firewire: add minor number range check to fw_device_init()
From: Tejun Heo <tj@xxxxxxxxxx>
commit 3bec60d511179853138836ae6e1b61fe34d9235f upstream.
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@xxxxxxxxxx>
Suggested-by: Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>
Acked-by: Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/firewire/core-device.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/firewire/core-device.c
+++ b/drivers/firewire/core-device.c
@@ -999,6 +999,10 @@ 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)
Patches currently in stable-queue which might be from tj@xxxxxxxxxx are
queue-3.4/firewire-add-minor-number-range-check-to-fw_device_init.patch
queue-3.4/posix-timer-don-t-call-idr_find-with-out-of-range-id.patch
queue-3.4/block-fix-synchronization-and-limit-check-in-blk_alloc_devt.patch
queue-3.4/idr-fix-a-subtle-bug-in-idr_get_next.patch
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