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| author | Mathias Krause <minipli@googlemail.com> | 2012-08-15 11:31:49 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-02 10:38:41 -0700 |
| commit | a194d08d452a87b194f9d61b30f2bd87d2cb1836 (patch) | |
| tree | 5e09f74caacf5acbfffe9b2df055b158ad28b7d1 /net/bluetooth | |
| parent | 352e3a79d7885339ea18c4bad77d4508616fa61c (diff) | |
| download | lwn-a194d08d452a87b194f9d61b30f2bd87d2cb1836.tar.gz lwn-a194d08d452a87b194f9d61b30f2bd87d2cb1836.zip | |
Bluetooth: RFCOMM - Fix info leak in ioctl(RFCOMMGETDEVLIST)
[ Upstream commit f9432c5ec8b1e9a09b9b0e5569e3c73db8de432a ]
The RFCOMM code fails to initialize the two padding bytes of struct
rfcomm_dev_list_req inserted for alignment before copying it to
userland. Additionally there are two padding bytes in each instance of
struct rfcomm_dev_info. The ioctl() that for disclosures two bytes plus
dev_num times two bytes uninitialized kernel heap memory.
Allocate the memory using kzalloc() to fix this issue.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Gustavo Padovan <gustavo@padovan.org>
Cc: Johan Hedberg <johan.hedberg@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/bluetooth')
| -rw-r--r-- | net/bluetooth/rfcomm/tty.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index d1820ff14aee..6435296afb93 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -461,7 +461,7 @@ static int rfcomm_get_dev_list(void __user *arg) size = sizeof(*dl) + dev_num * sizeof(*di); - dl = kmalloc(size, GFP_KERNEL); + dl = kzalloc(size, GFP_KERNEL); if (!dl) return -ENOMEM; |