From: Haimin Zhang <tcs.kernel@gmail.com>
To: gregkh@linuxfoundation.org, linux-usb@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: Haimin Zhang <tcs_kernel@tencent.com>, TCS Robot <tcs_robot@tencent.com>
Subject: [PATCH] USB: array-index-out-of-bounds in ehci_brcm_hub_control
Date: Tue, 2 Nov 2021 15:44:46 +0800 [thread overview]
Message-ID: <20211102074446.87107-1-tcs_kernel@tencent.com> (raw)
There isn't enough check parameter `wIndex` in the function
`ehci_brcm_hub_control`;due to the size of array `port_status`
is 15, so it may lead to out of bounds.
Signed-off-by: Haimin Zhang <tcs_kernel@tencent.com>
Reported-by: TCS Robot <tcs_robot@tencent.com>
---
drivers/usb/host/ehci-brcm.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/host/ehci-brcm.c b/drivers/usb/host/ehci-brcm.c
index d3626bfa966b..4ca3eb9fcda9 100644
--- a/drivers/usb/host/ehci-brcm.c
+++ b/drivers/usb/host/ehci-brcm.c
@@ -63,7 +63,8 @@ static int ehci_brcm_hub_control(
unsigned long flags;
int retval, irq_disabled = 0;
- status_reg = &ehci->regs->port_status[(wIndex & 0xff) - 1];
+ if (wIndex && wIndex <= ports)
+ status_reg = &ehci->regs->port_status[(wIndex & 0xff) - 1];
/*
* RESUME is cleared when GetPortStatus() is called 20ms after start
--
next reply other threads:[~2021-11-02 7:46 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-02 7:44 Haimin Zhang [this message]
2021-11-02 15:25 ` [PATCH] USB: array-index-out-of-bounds in ehci_brcm_hub_control Alan Stern
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