mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-21 22:47:56 +00:00
39 lines
1.5 KiB
Diff
39 lines
1.5 KiB
Diff
From e0a8ef4d7b4315bc4c1641fb3f3a7dfdfa6627b8 Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
|
|
Date: Wed, 20 Feb 2019 11:30:47 +0100
|
|
Subject: [PATCH] brcmfmac: add basic validation of shared RAM address
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
While experimenting with firmware loading I ended up in a state of
|
|
firmware reporting shared RAM address 0x04000001. It was causing:
|
|
[ 94.448015] Unable to handle kernel paging request at virtual address cd680001
|
|
due to reading out of the mapped memory.
|
|
|
|
This patch adds some basic validation to avoid kernel crashes due to the
|
|
unexpected firmware behavior.
|
|
|
|
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
|
|
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
|
|
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
|
|
---
|
|
drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c | 6 ++++++
|
|
1 file changed, 6 insertions(+)
|
|
|
|
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
|
|
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
|
|
@@ -1560,6 +1560,12 @@ static int brcmf_pcie_download_fw_nvram(
|
|
brcmf_err(bus, "FW failed to initialize\n");
|
|
return -ENODEV;
|
|
}
|
|
+ if (sharedram_addr < devinfo->ci->rambase ||
|
|
+ sharedram_addr >= devinfo->ci->rambase + devinfo->ci->ramsize) {
|
|
+ brcmf_err(bus, "Invalid shared RAM address 0x%08x\n",
|
|
+ sharedram_addr);
|
|
+ return -ENODEV;
|
|
+ }
|
|
brcmf_dbg(PCIE, "Shared RAM addr: 0x%08x\n", sharedram_addr);
|
|
|
|
return (brcmf_pcie_init_share_ram_info(devinfo, sharedram_addr));
|