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e1000e: write protect ICHx NVM to prevent malicious write/erase

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Set the hardware to ignore all write/erase cycles to the GbE region in
the ICHx NVM.  This feature can be disabled by the WriteProtectNVM module
parameter (enabled by default) only after a hardware reset, but
the machine must be power cycled before trying to enable writes.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
CC: arjan@linux.intel.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Bruce Allan
2008-10-01 17:18:35 -07:00
committed by Linus Torvalds
parent 20b918dc77
commit 4a77035828
5 changed files with 100 additions and 3 deletions
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3
drivers/net/e1000e/ethtool.c
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@ -529,6 +529,9 @@ static int e1000_set_eeprom(struct net_device *netdev,
if (eeprom->magic != (adapter->pdev->vendor | (adapter->pdev->device << 16)))
return -EFAULT;
if (adapter->flags & FLAG_READ_ONLY_NVM)
return -EINVAL;
max_len = hw->nvm.word_size * 2;
first_word = eeprom->offset >> 1;