diff options
| author | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2015-06-11 18:17:27 +0100 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2015-07-07 14:54:49 +0200 |
| commit | afcddefdbe75d0c20bf6e11b5512ba768ce0700c (patch) | |
| tree | 1a47d61771d3f0fbf0eb16be1673d071c172b68c /migration | |
| parent | e4d633207c129dc5b7d145240ac4a1997ef3902f (diff) | |
Sanity check RDMA remote data
Perform some basic (but probably not complete) sanity checking on
requests from the RDMA source.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Michael R. Hines <mrhines@us.ibm.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'migration')
| -rw-r--r-- | migration/rdma.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/migration/rdma.c b/migration/rdma.c index 73844a31fd..73a79be645 100644 --- a/migration/rdma.c +++ b/migration/rdma.c @@ -2992,6 +2992,13 @@ static int qemu_rdma_registration_handle(QEMUFile *f, void *opaque) trace_qemu_rdma_registration_handle_compress(comp->length, comp->block_idx, comp->offset); + if (comp->block_idx >= rdma->local_ram_blocks.nb_blocks) { + error_report("rdma: 'compress' bad block index %u (vs %d)", + (unsigned int)comp->block_idx, + rdma->local_ram_blocks.nb_blocks); + ret = -EIO; + break; + } block = &(rdma->local_ram_blocks.block[comp->block_idx]); host_addr = block->local_host_addr + @@ -3080,8 +3087,23 @@ static int qemu_rdma_registration_handle(QEMUFile *f, void *opaque) trace_qemu_rdma_registration_handle_register_loop(count, reg->current_index, reg->key.current_addr, reg->chunks); + if (reg->current_index >= rdma->local_ram_blocks.nb_blocks) { + error_report("rdma: 'register' bad block index %u (vs %d)", + (unsigned int)reg->current_index, + rdma->local_ram_blocks.nb_blocks); + ret = -ENOENT; + break; + } block = &(rdma->local_ram_blocks.block[reg->current_index]); if (block->is_ram_block) { + if (block->offset > reg->key.current_addr) { + error_report("rdma: bad register address for block %s" + " offset: %" PRIx64 " current_addr: %" PRIx64, + block->block_name, block->offset, + reg->key.current_addr); + ret = -ERANGE; + break; + } host_addr = (block->local_host_addr + (reg->key.current_addr - block->offset)); chunk = ram_chunk_index(block->local_host_addr, @@ -3090,6 +3112,14 @@ static int qemu_rdma_registration_handle(QEMUFile *f, void *opaque) chunk = reg->key.chunk; host_addr = block->local_host_addr + (reg->key.chunk * (1UL << RDMA_REG_CHUNK_SHIFT)); + /* Check for particularly bad chunk value */ + if (host_addr < (void *)block->local_host_addr) { + error_report("rdma: bad chunk for block %s" + " chunk: %" PRIx64, + block->block_name, reg->key.chunk); + ret = -ERANGE; + break; + } } chunk_start = ram_chunk_start(block, chunk); chunk_end = ram_chunk_end(block, chunk + reg->chunks); |