>From f228745a844cf56f8d12f06be31a687acd91f653 Mon Sep 17 00:00:00 2001 From: Kevin McKinney <klmckinney1@xxxxxxxxx> Date: Sat, 3 Sep 2011 15:15:20 -0400 Subject: [PATCH 2/2] Staging: bcm: Add size maximum size restrictions for IOCTL_IDLE_REQ The maximum size is from the maximum size of the control packet in ->Adapter->txctlpacket[] which is allocated in InitAdapter(). If we don't cap the max we could get a stack trace from kmalloc() but it's not harmful. Signed-off-by: Kevin McKinney <klmckinney1@xxxxxxxxx> --- drivers/staging/bcm/Bcmchar.c | 3 +++ drivers/staging/bcm/Misc.c | 4 ++++ 2 files changed, 7 insertions(+), 0 deletions(-) delete mode 100644 arch/arm/mach-lpc32xx/include/mach/gpio.h diff --git a/arch/arm/mach-lpc32xx/include/mach/gpio.h b/arch/arm/mach-lpc32xx/include/mach/gpio.h deleted file mode 100644 index e69de29..0000000 diff --git a/drivers/staging/bcm/Bcmchar.c b/drivers/staging/bcm/Bcmchar.c index 1905a83..4c43353 100644 --- a/drivers/staging/bcm/Bcmchar.c +++ b/drivers/staging/bcm/Bcmchar.c @@ -690,6 +690,9 @@ static long bcm_char_ioctl(struct file *filp, UINT cmd, ULONG arg) if (IoBuffer.InputLength < sizeof(struct link_request)) return -EINVAL; + if (IoBuffer.InputLength > MAX_CNTL_PKT_SIZE) + return -EINVAL; + pvBuffer = kmalloc(IoBuffer.InputLength, GFP_KERNEL); if (!pvBuffer) return -ENOMEM; diff --git a/drivers/staging/bcm/Misc.c b/drivers/staging/bcm/Misc.c index c5b3a36..9da9408 100644 --- a/drivers/staging/bcm/Misc.c +++ b/drivers/staging/bcm/Misc.c @@ -421,6 +421,10 @@ INT CopyBufferToControlPacket(PMINI_ADAPTER Adapter,/**<Logical Adapter*/ pLeader->PLength = pktlen; } } + + if (pktlen + LEADER_SIZE > MAX_CNTL_PKT_SIZE) + return -EINVAL; + memset(ctrl_buff, 0, pktlen+LEADER_SIZE); BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, TX_CONTROL, DBG_LVL_ALL, "Copying the Control Packet Buffer with length=%d\n", pLeader->PLength); *(PLEADER)ctrl_buff=*pLeader; -- 1.7.4.1 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
