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| author | Stefan Hajnoczi <stefanha@redhat.com> | 2014-03-26 13:05:27 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2014-04-01 13:59:47 +0200 |
| commit | 7b103b36d6ef3b11827c203d3a793bf7da50ecd6 (patch) | |
| tree | 8410b6bced1fbf51927ab319ccca226396376905 /tests/qemu-iotests | |
| parent | 509a41bab5306181044b5fff02eadf96d9c8676a (diff) | |
| download | qemu-7b103b36d6ef3b11827c203d3a793bf7da50ecd6.zip qemu-7b103b36d6ef3b11827c203d3a793bf7da50ecd6.tar.gz qemu-7b103b36d6ef3b11827c203d3a793bf7da50ecd6.tar.bz2 | |
block/cloop: refuse images with huge offsets arrays (CVE-2014-0144)
Limit offsets_size to 512 MB so that:
1. g_malloc() does not abort due to an unreasonable size argument.
2. offsets_size does not overflow the bdrv_pread() int size argument.
This limit imposes a maximum image size of 16 TB at 256 KB block size.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'tests/qemu-iotests')
| -rwxr-xr-x | tests/qemu-iotests/075 | 6 | ||||
| -rw-r--r-- | tests/qemu-iotests/075.out | 4 |
2 files changed, 10 insertions, 0 deletions
diff --git a/tests/qemu-iotests/075 b/tests/qemu-iotests/075 index 9ce6b1f..9c00fa8 100755 --- a/tests/qemu-iotests/075 +++ b/tests/qemu-iotests/075 @@ -74,6 +74,12 @@ _use_sample_img simple-pattern.cloop.bz2 poke_file "$TEST_IMG" "$n_blocks_offset" "\xff\xff\xff\xff" $QEMU_IO -c "read 0 512" $TEST_IMG 2>&1 | _filter_qemu_io | _filter_testdir +echo +echo "== refuse images that require too many offsets ===" +_use_sample_img simple-pattern.cloop.bz2 +poke_file "$TEST_IMG" "$n_blocks_offset" "\x04\x00\x00\x01" +$QEMU_IO -c "read 0 512" $TEST_IMG 2>&1 | _filter_qemu_io | _filter_testdir + # success, all done echo "*** done" rm -f $seq.full diff --git a/tests/qemu-iotests/075.out b/tests/qemu-iotests/075.out index a771789..7cdaee1 100644 --- a/tests/qemu-iotests/075.out +++ b/tests/qemu-iotests/075.out @@ -19,4 +19,8 @@ no file open, try 'help open' == offsets_size overflow === qemu-io: can't open device TEST_DIR/simple-pattern.cloop: n_blocks 4294967295 must be 536870911 or less no file open, try 'help open' + +== refuse images that require too many offsets === +qemu-io: can't open device TEST_DIR/simple-pattern.cloop: image requires too many offsets, try increasing block size +no file open, try 'help open' *** done |