tree af8097516b3cd9d9f2397080e4cf81414fd4172a
parent 51dced544e3964b684afc99282ceceaa384b16a8
author Martin Schwidefsky <schwidefsky@de.ibm.com> 1159455363 +0200
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1159455363 +0200

[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>