tests: avoid false failure in shred-passes.sh

* tests/misc/shred-passes.sh: Specify an exact amount to shred,
to avoid running out of simulated random data on file systems
with a large st_blksize like GPFS for example.
Reported by Assaf Gordon.

diff --git a/tests/misc/shred-passes.sh b/tests/misc/shred-passes.sh
index f237f5aca5409a5d44ff0916bb3e0ff7bc046e10..da0946ac0690bf89e84b39269ed6149e677fa118 100755 (executable)
--- a/tests/misc/shred-passes.sh
+++ b/tests/misc/shred-passes.sh
@@ -76,7 +76,7 @@ shred: f: removing
 shred: f: renamed to 0
 shred: f: removed" > exp || framework_failure_
 
-shred -v -u -n20 --random-source=Us f 2>out || fail=1
+shred -v -u -n20 -s4096 --random-source=Us f 2>out || fail=1
 compare exp out || fail=1