Author: kib
Date: Mon Mar 28 13:21:26 2011
New Revision: 220101
URL: http://svn.freebsd.org/changeset/base/220101
Log:
Handle zero length in copyout_unmap().
Submitted by: John Wehle <john feith com>
MFC after: 2 weeks
Modified:
head/sys/kern/subr_uio.c
Modified: head/sys/kern/subr_uio.c
==============================================================================
--- head/sys/kern/subr_uio.c Mon Mar 28 12:48:33 2011 (r220100)
+++ head/sys/kern/subr_uio.c Mon Mar 28 13:21:26 2011 (r220101)
@@ -498,6 +498,9 @@ copyout_unmap(struct thread *td, vm_offs
vm_map_t map;
vm_size_t size;
+ if (sz == 0)
+ return (0);
+
map = &td->td_proc->p_vmspace->vm_map;
size = (vm_size_t) round_page(sz);
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