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Dan Carpenter authored
commit 201f99f1 upstream.

We don't cap the size of buffer from the user so we could write past the
end of the array here.  Only root can write to this file.

Reported-by: default avatarNico Golde <nico@ngolde.de>
Reported-by: default avatarFabian Yamaguchi <fabs@goesec.de>
Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
07958465
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