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Writing a icmp_packet_rr and then reading icmp_packet can lead to kernel memory corruption, if __user *buf is just below TASK_SIZE. Signed-off-by: Paul Kot <pawlkt@gmail.com> [sven@narfation.org: made it checkpatch clean] Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>