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rdma: use resp.len after validation in qemu_rdma_registration_stop 

resp.len is given from remote host. So should be validated before use.
Otherwise memcpy can access beyond the buffer.

Cc: Michael R. Hines <mrhines@us.ibm.com>
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Reviewed-by: Michael R. Hines <mrhines@us.ibm.com>
Signed-off-by: Isaku Yamahata <yamahata@private.email.ne.jp>
Signed-off-by: Michael R. Hines <mrhines@us.ibm.com>
Message-id: 1376078746-24948-2-git-send-email-mrhines@linux.vnet.ibm.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Isaku Yamahata 2013-08-09 16:05:40 -04:00 committed by Anthony Liguori
parent 6dd2a5c98a
commit 885e8f984e
1 changed files with 3 additions and 4 deletions
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7
migration-rdma.c
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@ -3045,10 +3045,6 @@ static int qemu_rdma_registration_stop(QEMUFile *f, void *opaque,
return ret;
}
qemu_rdma_move_header(rdma, reg_result_idx, &resp);
memcpy(rdma->block,
rdma->wr_data[reg_result_idx].control_curr, resp.len);
nb_remote_blocks = resp.len / sizeof(RDMARemoteBlock);
/*
@ -3070,6 +3066,9 @@ static int qemu_rdma_registration_stop(QEMUFile *f, void *opaque,
return -EINVAL;
}
qemu_rdma_move_header(rdma, reg_result_idx, &resp);
memcpy(rdma->block,
rdma->wr_data[reg_result_idx].control_curr, resp.len);
for (i = 0; i < nb_remote_blocks; i++) {
network_to_remote_block(&rdma->block[i]);