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2005 Nov 06
2
Bug in use of grant tables in blkback.c error path?
In dispatch_rw_block_io after a call to HYPERVISOR_grant_table_op, there
is the following code which calls fast_flush_area and breaks out of the
loop early if one of the handles returned from HYPERVISOR_grant_table_op
is negative:
for (i = 0; i < nseg; i++) {
if (unlikely(map[i].handle < 0)) {
DPRINTK("invalid buffer -- could not remap it\n");
fast_flush_area(pending_idx,