The shell script attempts to suppress core dumps like this: old_ulimit=$(ulimit -c) ulimit -c 0 $QEMU_IO arg... ulimit -c "$old_ulimit"
This breaks the test hard unless the limit was zero to begin with! ulimit sets both hard and soft limit by default, and (re-)raising the hard limit requires privileges. Broken since it was added in commit dc68afe. Could be fixed by adding -S to set only the soft limit, but I'm not sure how portable that is in practice. Simply do it in a subshell instead, like this: (ulimit -c 0; exec $QEMU_IO arg...) Signed-off-by: Markus Armbruster <arm...@redhat.com> --- tests/qemu-iotests/039 | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) diff --git a/tests/qemu-iotests/039 b/tests/qemu-iotests/039 index b9cbe99..182b0f0 100755 --- a/tests/qemu-iotests/039 +++ b/tests/qemu-iotests/039 @@ -67,10 +67,8 @@ echo "== Creating a dirty image file ==" IMGOPTS="compat=1.1,lazy_refcounts=on" _make_test_img $size -old_ulimit=$(ulimit -c) -ulimit -c 0 # do not produce a core dump on abort(3) -$QEMU_IO -c "write -P 0x5a 0 512" -c "abort" "$TEST_IMG" | _filter_qemu_io -ulimit -c "$old_ulimit" +(ulimit -c 0 # do not produce a core dump on abort(3) +exec $QEMU_IO -c "write -P 0x5a 0 512" -c "abort" "$TEST_IMG") | _filter_qemu_io # The dirty bit must be set ./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features @@ -103,10 +101,8 @@ echo "== Opening a dirty image read/write should repair it ==" IMGOPTS="compat=1.1,lazy_refcounts=on" _make_test_img $size -old_ulimit=$(ulimit -c) -ulimit -c 0 # do not produce a core dump on abort(3) -$QEMU_IO -c "write -P 0x5a 0 512" -c "abort" "$TEST_IMG" | _filter_qemu_io -ulimit -c "$old_ulimit" +(ulimit -c 0 # do not produce a core dump on abort(3) +exec $QEMU_IO -c "write -P 0x5a 0 512" -c "abort" "$TEST_IMG") | _filter_qemu_io # The dirty bit must be set ./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features @@ -122,10 +118,8 @@ echo "== Creating an image file with lazy_refcounts=off ==" IMGOPTS="compat=1.1,lazy_refcounts=off" _make_test_img $size -old_ulimit=$(ulimit -c) -ulimit -c 0 # do not produce a core dump on abort(3) -$QEMU_IO -c "write -P 0x5a 0 512" -c "abort" "$TEST_IMG" | _filter_qemu_io -ulimit -c "$old_ulimit" +(ulimit -c 0 # do not produce a core dump on abort(3) +exec $QEMU_IO -c "write -P 0x5a 0 512" -c "abort" "$TEST_IMG") | _filter_qemu_io # The dirty bit must not be set since lazy_refcounts=off ./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features -- 1.8.1.4