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Commit 45c6ceb5 authored by Sage Weil's avatar Sage Weil
Browse files

ceph: zero unused message header, footer fields 



We shouldn't leak any prior memory contents to other parties.  And random
data, particularly in the 'version' field, can cause problems down the
line.

Signed-off-by: default avatarSage Weil <sage@newdream.net>
parent 9abf82b8

fs/ceph/messenger.c

+5 −1
Original line number Diff line number Diff line
@@ -2085,15 +2085,19 @@ struct ceph_msg *ceph_msg_new(int type, int front_len, 
	kref_init(&m->kref);

	INIT_LIST_HEAD(&m->list_head);



	m->hdr.tid = 0;

	m->hdr.type = cpu_to_le16(type);

	m->hdr.priority = cpu_to_le16(CEPH_MSG_PRIO_DEFAULT);

	m->hdr.version = 0;

	m->hdr.front_len = cpu_to_le32(front_len);

	m->hdr.middle_len = 0;

	m->hdr.data_len = cpu_to_le32(page_len);

	m->hdr.data_off = cpu_to_le16(page_off);

	m->hdr.priority = cpu_to_le16(CEPH_MSG_PRIO_DEFAULT);

	m->hdr.reserved = 0;

	m->footer.front_crc = 0;

	m->footer.middle_crc = 0;

	m->footer.data_crc = 0;

	m->footer.flags = 0;

	m->front_max = front_len;

	m->front_is_vmalloc = false;

	m->more_to_follow = false;