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Date: Thu, 18 Apr 2019 21:33:59 +0800
From: Fuqian Huang <huangfq.daxian@...il.com>
To: oss-security@...ts.openwall.com
Subject: Linux kernel < 4.14.111 drivers/net/wan/lmc/lmc_main.c kernel address
dumps to user space
In drivers/net/wan/lmc/lmc_main.c:510,
lmc_ioctl will dump the address of data to dmesg when xc.command is
lmc_xilinx_load, which allows local user to read the kernel address.
int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
{
...
case lmc_xilinx_load: /*fold02*/
...
printk("%s: Starting load of data Len: %d at 0x%p ==
0x%p\n", dev->name, xc.len, xc.data, data);
}
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