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author | Kevin Wolf <kwolf@redhat.com> | 2014-07-17 11:41:53 +0200 |
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committer | Stefan Hajnoczi <stefanha@redhat.com> | 2014-07-18 13:12:15 +0100 |
commit | 12ac6d3db721a288c8953c5c253230aa0949a0e1 (patch) | |
tree | ab3f09b92659e40af1809e7f65030a56c3f29c68 /tests | |
parent | 5a7348045091a2bc15d85bb177e5956aa6114e5a (diff) | |
download | qemu-12ac6d3db721a288c8953c5c253230aa0949a0e1.zip qemu-12ac6d3db721a288c8953c5c253230aa0949a0e1.tar.gz qemu-12ac6d3db721a288c8953c5c253230aa0949a0e1.tar.bz2 |
qcow2: Fix error path for unknown incompatible features
qcow2's report_unsupported_feature() had two bugs: A 32 bit truncation
would prevent feature table entries for bits 32-63 from being used, and
it could assign errp multiple times if there was more than one unknown
feature, resulting in an error_set() assertion failure.
Fix the truncation, make sure to set the error exactly once and add a
qemu-iotests case for it.
This fixes https://bugs.launchpad.net/qemu/+bug/1342704/
Reported-by: Maria Kustova <maria.k@catit.be>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'tests')
-rwxr-xr-x | tests/qemu-iotests/036 | 52 | ||||
-rw-r--r-- | tests/qemu-iotests/036.out | 35 | ||||
-rwxr-xr-x | tests/qemu-iotests/qcow2.py | 15 |
3 files changed, 96 insertions, 6 deletions
diff --git a/tests/qemu-iotests/036 b/tests/qemu-iotests/036 index a773653..392f1ef 100755 --- a/tests/qemu-iotests/036 +++ b/tests/qemu-iotests/036 @@ -1,6 +1,6 @@ #!/bin/bash # -# Test that qcow2 unknown autoclear feature bits are cleared +# Test qcow2 feature bits # # Copyright (C) 2011 Red Hat, Inc. # Copyright IBM, Corp. 2010 @@ -50,6 +50,56 @@ _supported_os Linux # Only qcow2v3 and later supports feature bits IMGOPTS="compat=1.1" +echo +echo === Image with unknown incompatible feature bit === +echo +_make_test_img 64M +$PYTHON qcow2.py "$TEST_IMG" set-feature-bit incompatible 63 + +# Without feature table +$PYTHON qcow2.py "$TEST_IMG" dump-header +_img_info + +# With feature table containing bit 63 +printf "\x00\x3f%s" "Test feature" | $PYTHON qcow2.py "$TEST_IMG" add-header-ext-stdio 0x6803f857 +_img_info + +echo +echo === Image with multiple incompatible feature bits === +echo +_make_test_img 64M +$PYTHON qcow2.py "$TEST_IMG" set-feature-bit incompatible 61 +$PYTHON qcow2.py "$TEST_IMG" set-feature-bit incompatible 62 +$PYTHON qcow2.py "$TEST_IMG" set-feature-bit incompatible 63 + +# Without feature table +_img_info + +# With feature table containing bit 63 +printf "\x00\x3f%s" "Test feature" | $PYTHON qcow2.py "$TEST_IMG" add-header-ext-stdio 0x6803f857 +_img_info + +# With feature table containing bit 61 +$PYTHON qcow2.py "$TEST_IMG" del-header-ext 0x6803f857 +printf "\x00\x3d%s" "Test feature" | $PYTHON qcow2.py "$TEST_IMG" add-header-ext-stdio 0x6803f857 +_img_info + +# With feature table containing bits 61 and 62 +$PYTHON qcow2.py "$TEST_IMG" del-header-ext 0x6803f857 +printf "\x00\x3d%s\x00%40s\x00\x3e%s\x00%40s" "test1" "" "test2" "" | $PYTHON qcow2.py "$TEST_IMG" add-header-ext-stdio 0x6803f857 +_img_info + +# With feature table containing all bits +$PYTHON qcow2.py "$TEST_IMG" del-header-ext 0x6803f857 +printf "\x00\x3d%s\x00%40s\x00\x3e%s\x00%40s\x00\x3f%s\x00%40s" "test1" "" "test2" "" "test3" "" | $PYTHON qcow2.py "$TEST_IMG" add-header-ext-stdio 0x6803f857 +_img_info + +# With feature table containing unrelated bits, including compatible/autoclear +$PYTHON qcow2.py "$TEST_IMG" del-header-ext 0x6803f857 +printf "\x01\x3d%s\x00%40s\x00\x3e%s\x00%40s\x02\x3f%s\x00%40s\x00\x3c%s\x00%40s" "test1" "" "test2" "" "test3" "" "test4" "" | $PYTHON qcow2.py "$TEST_IMG" add-header-ext-stdio 0x6803f857 +_img_info + + echo === Create image with unknown autoclear feature bit === echo _make_test_img 64M diff --git a/tests/qemu-iotests/036.out b/tests/qemu-iotests/036.out index 55a3e6e..720bd89 100644 --- a/tests/qemu-iotests/036.out +++ b/tests/qemu-iotests/036.out @@ -1,4 +1,39 @@ QA output created by 036 + +=== Image with unknown incompatible feature bit === + +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 +magic 0x514649fb +version 3 +backing_file_offset 0x0 +backing_file_size 0x0 +cluster_bits 16 +size 67108864 +crypt_method 0 +l1_size 1 +l1_table_offset 0x30000 +refcount_table_offset 0x10000 +refcount_table_clusters 1 +nb_snapshots 0 +snapshot_offset 0x0 +incompatible_features 0x8000000000000000 +compatible_features 0x0 +autoclear_features 0x0 +refcount_order 4 +header_length 104 + +qemu-img: Could not open 'TEST_DIR/t.IMGFMT': 'image' uses a IMGFMT feature which is not supported by this qemu version: Unknown incompatible feature: 8000000000000000 +qemu-img: Could not open 'TEST_DIR/t.IMGFMT': 'image' uses a IMGFMT feature which is not supported by this qemu version: Test feature + +=== Image with multiple incompatible feature bits === + +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 +qemu-img: Could not open 'TEST_DIR/t.IMGFMT': 'image' uses a IMGFMT feature which is not supported by this qemu version: Unknown incompatible feature: e000000000000000 +qemu-img: Could not open 'TEST_DIR/t.IMGFMT': 'image' uses a IMGFMT feature which is not supported by this qemu version: Test feature, Unknown incompatible feature: 6000000000000000 +qemu-img: Could not open 'TEST_DIR/t.IMGFMT': 'image' uses a IMGFMT feature which is not supported by this qemu version: Test feature, Unknown incompatible feature: c000000000000000 +qemu-img: Could not open 'TEST_DIR/t.IMGFMT': 'image' uses a IMGFMT feature which is not supported by this qemu version: test1, test2, Unknown incompatible feature: 8000000000000000 +qemu-img: Could not open 'TEST_DIR/t.IMGFMT': 'image' uses a IMGFMT feature which is not supported by this qemu version: test1, test2, test3 +qemu-img: Could not open 'TEST_DIR/t.IMGFMT': 'image' uses a IMGFMT feature which is not supported by this qemu version: test2, Unknown incompatible feature: a000000000000000 === Create image with unknown autoclear feature bit === Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 diff --git a/tests/qemu-iotests/qcow2.py b/tests/qemu-iotests/qcow2.py index 44a2b45..2058596 100755 --- a/tests/qemu-iotests/qcow2.py +++ b/tests/qemu-iotests/qcow2.py @@ -176,6 +176,10 @@ def cmd_add_header_ext(fd, magic, data): h.extensions.append(QcowHeaderExtension.create(magic, data)) h.update(fd) +def cmd_add_header_ext_stdio(fd, magic): + data = sys.stdin.read() + cmd_add_header_ext(fd, magic, data) + def cmd_del_header_ext(fd, magic): try: magic = int(magic, 0) @@ -220,11 +224,12 @@ def cmd_set_feature_bit(fd, group, bit): h.update(fd) cmds = [ - [ 'dump-header', cmd_dump_header, 0, 'Dump image header and header extensions' ], - [ 'set-header', cmd_set_header, 2, 'Set a field in the header'], - [ 'add-header-ext', cmd_add_header_ext, 2, 'Add a header extension' ], - [ 'del-header-ext', cmd_del_header_ext, 1, 'Delete a header extension' ], - [ 'set-feature-bit', cmd_set_feature_bit, 2, 'Set a feature bit'], + [ 'dump-header', cmd_dump_header, 0, 'Dump image header and header extensions' ], + [ 'set-header', cmd_set_header, 2, 'Set a field in the header'], + [ 'add-header-ext', cmd_add_header_ext, 2, 'Add a header extension' ], + [ 'add-header-ext-stdio', cmd_add_header_ext_stdio, 1, 'Add a header extension, data from stdin' ], + [ 'del-header-ext', cmd_del_header_ext, 1, 'Delete a header extension' ], + [ 'set-feature-bit', cmd_set_feature_bit, 2, 'Set a feature bit'], ] def main(filename, cmd, args): |