diff options
| author | Tejun Heo <tj@kernel.org> | 2013-02-27 17:04:04 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-04 06:09:04 +0800 |
| commit | cbf253c44b52b3c6b921a22f05243a1dc7a00122 (patch) | |
| tree | 213ab20188e0b5849030e031ca43ff6e463be5c2 /drivers | |
| parent | 4ec348232dc21cf79b62f32e0bdb099c9d817941 (diff) | |
firewire: add minor number range check to fw_device_init()
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@kernel.org>
Suggested-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Acked-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/firewire/core-device.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c index 9f661e069318..812cea37a5b5 100644 --- a/drivers/firewire/core-device.c +++ b/drivers/firewire/core-device.c @@ -995,6 +995,10 @@ 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) |