Author: kib
Date: Fri Apr 24 22:05:12 2015
New Revision: 281953
URL: https://svnweb.freebsd.org/changeset/base/281953
Log:
Use correct length for sparse uiomove(). It must be the clipped to
the page size, len is the total transfer length, which may be larger
than zero_region.
Reported and tested by: clusteradm (gjb)
Sponsored by: The FreeBSD Foundation
X-MFC-With: r281442
Modified:
head/sys/kern/uipc_shm.c
Modified: head/sys/kern/uipc_shm.c
==============================================================================
--- head/sys/kern/uipc_shm.c Fri Apr 24 22:04:59 2015 (r281952)
+++ head/sys/kern/uipc_shm.c Fri Apr 24 22:05:12 2015 (r281953)
@@ -170,7 +170,7 @@ uiomove_object_page(vm_object_t obj, siz
if (uio->uio_rw == UIO_READ && vm_page_lookup(obj, idx) == NULL &&
!vm_pager_has_page(obj, idx, NULL, NULL)) {
VM_OBJECT_WUNLOCK(obj);
- return (uiomove(__DECONST(void *, zero_region), len, uio));
+ return (uiomove(__DECONST(void *, zero_region), tlen, uio));
}
/*
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