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exec: fix madvise of NULL pointer 

Coverity flags this as "dereference after null check".  Not quite a
dereference, since it will just EFAULT, but still nice to fix.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2015-01-21 16:18:35 +01:00
parent dd858343a7
commit a904c91196
1 changed files with 7 additions and 6 deletions
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3
exec.c
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@ -1386,13 +1386,14 @@ static ram_addr_t ram_block_add(RAMBlock *new_block, Error **errp)
cpu_physical_memory_set_dirty_range(new_block->offset, cpu_physical_memory_set_dirty_range(new_block->offset,
new_block->used_length); new_block->used_length);
if (new_block->host) {
qemu_ram_setup_dump(new_block->host, new_block->max_length); qemu_ram_setup_dump(new_block->host, new_block->max_length);
qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_HUGEPAGE); qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_HUGEPAGE);
qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_DONTFORK); qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_DONTFORK);
if (kvm_enabled()) { if (kvm_enabled()) {
kvm_setup_guest_memory(new_block->host, new_block->max_length); kvm_setup_guest_memory(new_block->host, new_block->max_length);
} }
}
return new_block->offset; return new_block->offset;
} }