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52149ba6b0
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2 Commits

Author SHA1 Message Date
Martin Schwidefsky
52149ba6b0 [S390] user readable uninitialised kernel memory. 
A user space program can read uninitialised kernel memory
by appending to a file from a bad address and then reading
the result back. The cause is the copy_from_user function
that does not clear the remaining bytes of the kernel
buffer after it got a fault on the user space address.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
 2006-09-28 16:56:03 +02:00
Gerald Schaefer
d02765d1af [S390] Make user-copy operations run-time configurable. 
Introduces a struct uaccess_ops which allows setting user-copy
operations at run-time.

Signed-off-by: Gerald Schaefer <geraldsc@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
 2006-09-20 15:59:42 +02:00