mac80211: make debugfs files root-only

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Unfortunately, debugfs can be made to access invalid memory by
open()ing a file and then waiting until the corresponding debugfs
file has been removed (and, probably, the underlying object.)

That could be exploited by any user if the user is able to open
debugfs files and can cause networking devices, STA entries or
similar to disappear which is quite easy to do.

Hence, all debugfs files should be root-only.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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This commit is contained in:

Johannes Berg 2008-04-04 23:33:37 +02:00 • committed by John W. Linville

parent a82d992261

commit bebb8a5e2c

3 changed files with 6 additions and 6 deletions

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4

net/mac80211/debugfs.c

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6

net/mac80211/debugfs_netdev.c

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2

net/mac80211/debugfs_sta.c

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