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| author | Alberto Garcia <berto@igalia.com> | 2018-03-06 18:14:09 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2018-03-09 15:17:47 +0100 |
| commit | c7a9d81d7061a7fb3b5b5726a6f139444e1ad5e6 (patch) | |
| tree | 44b21981894d20caf3d27c5ce3d2e22fd0dde866 | |
| parent | c9a442e45094e693da45f0e3d03746d68e4460ec (diff) | |
| download | qemu-c7a9d81d7061a7fb3b5b5726a6f139444e1ad5e6.tar.gz | |
qcow2: Check snapshot L1 tables in qcow2_check_metadata_overlap()
The inactive-l2 overlap check iterates uses the L1 tables from all
snapshots, but it does not validate them first.
We now have a function to take care of this, so let's use it.
Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| -rw-r--r-- | block/qcow2-refcount.c | 10 | ||||
| -rwxr-xr-x | tests/qemu-iotests/080 | 4 | ||||
| -rw-r--r-- | tests/qemu-iotests/080.out | 4 |
3 files changed, 17 insertions, 1 deletions
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index 2f7e710fa6..b18ea0ca98 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -2642,9 +2642,17 @@ int qcow2_check_metadata_overlap(BlockDriverState *bs, int ign, int64_t offset, uint64_t l1_ofs = s->snapshots[i].l1_table_offset; uint32_t l1_sz = s->snapshots[i].l1_size; uint64_t l1_sz2 = l1_sz * sizeof(uint64_t); - uint64_t *l1 = g_try_malloc(l1_sz2); + uint64_t *l1; int ret; + ret = qcow2_validate_table(bs, l1_ofs, l1_sz, sizeof(uint64_t), + QCOW_MAX_L1_SIZE, "", NULL); + if (ret < 0) { + return ret; + } + + l1 = g_try_malloc(l1_sz2); + if (l1_sz2 && l1 == NULL) { return -ENOMEM; } diff --git a/tests/qemu-iotests/080 b/tests/qemu-iotests/080 index 5622604f83..018f815697 100755 --- a/tests/qemu-iotests/080 +++ b/tests/qemu-iotests/080 @@ -178,6 +178,8 @@ _make_test_img 64M poke_file "$TEST_IMG" "$offset_snap1_l1_offset" "\x00\x00\x00\x00\x00\x40\x02\x00" { $QEMU_IMG convert -s test $TEST_IMG $TEST_IMG.snap; } 2>&1 | _filter_testdir { $QEMU_IMG amend -o compat=0.10 $TEST_IMG; } 2>&1 | _filter_testdir +{ $QEMU_IO -c "open -o overlap-check.inactive-l2=on $TEST_IMG" \ + -c 'write 0 4k'; } 2>&1 | _filter_qemu_io | _filter_testdir echo echo "== Invalid snapshot L1 table size ==" @@ -187,6 +189,8 @@ _make_test_img 64M poke_file "$TEST_IMG" "$offset_snap1_l1_size" "\x10\x00\x00\x00" { $QEMU_IMG convert -s test $TEST_IMG $TEST_IMG.snap; } 2>&1 | _filter_testdir { $QEMU_IMG amend -o compat=0.10 $TEST_IMG; } 2>&1 | _filter_testdir +{ $QEMU_IO -c "open -o overlap-check.inactive-l2=on $TEST_IMG" \ + -c 'write 0 4k'; } 2>&1 | _filter_qemu_io | _filter_testdir # success, all done echo "*** done" diff --git a/tests/qemu-iotests/080.out b/tests/qemu-iotests/080.out index 315edbc26f..d622ac06c0 100644 --- a/tests/qemu-iotests/080.out +++ b/tests/qemu-iotests/080.out @@ -66,6 +66,8 @@ wrote 512/512 bytes at offset 0 qemu-img: Failed to load snapshot: Snapshot L1 table offset invalid qemu-img: Snapshot L1 table offset invalid qemu-img: Error while amending options: Invalid argument +Failed to flush the refcount block cache: Invalid argument +write failed: Invalid argument == Invalid snapshot L1 table size == Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 @@ -74,4 +76,6 @@ wrote 512/512 bytes at offset 0 qemu-img: Failed to load snapshot: Snapshot L1 table too large qemu-img: Snapshot L1 table too large qemu-img: Error while amending options: File too large +Failed to flush the refcount block cache: File too large +write failed: File too large *** done |