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-rw-r--r--cddl/contrib/opensolaris/lib/libzpool/common/kernel.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/cddl/contrib/opensolaris/lib/libzpool/common/kernel.c b/cddl/contrib/opensolaris/lib/libzpool/common/kernel.c
index 2c07787..56bf718 100644
--- a/cddl/contrib/opensolaris/lib/libzpool/common/kernel.c
+++ b/cddl/contrib/opensolaris/lib/libzpool/common/kernel.c
@@ -474,7 +474,9 @@ vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len, offset_t offset,
* To simulate partial disk writes, we split writes into two
* system calls so that the process can be killed in between.
*/
- split = (len > 0 ? rand() % len : 0);
+ int sectors = len >> SPA_MINBLOCKSHIFT;
+ split = (sectors > 0 ? rand() % sectors : 0) <<
+ SPA_MINBLOCKSHIFT;
iolen = pwrite64(vp->v_fd, addr, split, offset);
iolen += pwrite64(vp->v_fd, (char *)addr + split,
len - split, offset + split);
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