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bd385a5298
qemu/block
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Kevin Wolf bd385a5298 qcow2: Don't open data_file with BDRV_O_NO_IO 
One use case for 'qemu-img info' is verifying that untrusted images
don't reference an unwanted external file, be it as a backing file or an
external data file. To make sure that calling 'qemu-img info' can't
already have undesired side effects with a malicious image, just don't
open the data file at all with BDRV_O_NO_IO. If nothing ever tries to do
I/O, we don't need to have it open.

This changes the output of iotests case 061, which used 'qemu-img info'
to show that opening an image with an invalid data file fails. After
this patch, it succeeds. Replace this part of the test with a qemu-io
call, but keep the final 'qemu-img info' to show that the invalid data
file is correctly displayed in the output.

Fixes: CVE-2024-4467
Cc: qemu-stable@nongnu.org
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
2024-07-02 18:09:51 +02:00
..
export block: remove outdated AioContext locking comments 2023-12-21 22:49:27 +01:00
monitor stream: Allow users to request only format driver names in backing file format 2024-01-26 11:16:58 +01:00
accounting.c block: add missed block_acct_setup with new block device init procedure 2022-09-30 18:42:34 +02:00
aio_task.c block/aio_task: assert max_busy_tasks is greater than 0 2021-10-05 18:56:41 +02:00
amend.c block: Mark BlockDriver callbacks for amend job GRAPH_RDLOCK 2023-05-10 14:16:54 +02:00
backup.c qapi: blockdev-backup: add discard-source parameter 2024-05-28 15:52:15 +03:00
blkdebug.c block: remove separate bdrv_file_open callback 2024-06-28 14:44:51 +02:00
blkio.c block: rename former bdrv_file_open callbacks 2024-06-28 14:44:51 +02:00
blklogwrites.c block/blklogwrites: Protect mutable driver state with a mutex. 2024-01-26 11:16:58 +01:00
blkreplay.c block: Protect bs->file with graph_lock 2023-11-08 17:56:18 +01:00
blkverify.c block: remove separate bdrv_file_open callback 2024-06-28 14:44:51 +02:00
block-backend.c block-backend: fix edge case in bdrv_next_cleanup() where BDS associated to BB changes 2024-03-26 14:21:26 +01:00
block-copy.c qapi: blockdev-backup: add discard-source parameter 2024-05-28 15:52:15 +03:00
block-gen.h block-coroutine-wrapper.py: support also basic return types 2022-12-15 16:07:43 +01:00
block-ram-registrar.c block: add BlockRAMRegistrar 2022-10-26 14:56:42 -04:00
bochs.c block: Take graph lock for most of .bdrv_open 2023-11-08 17:56:18 +01:00
cloop.c block: Take graph lock for most of .bdrv_open 2023-11-08 17:56:18 +01:00
commit.c commit: Allow users to request only format driver names in backing file format 2024-01-26 11:16:58 +01:00
copy-before-write.c block/copy-before-write: use uint64_t for timeout in nanoseconds 2024-06-10 11:05:43 +02:00
copy-before-write.h qapi: blockdev-backup: add discard-source parameter 2024-05-28 15:52:15 +03:00
copy-on-read.c block: Take graph lock for most of .bdrv_open 2023-11-08 17:56:18 +01:00
copy-on-read.h block: Mark bdrv_(un)freeze_backing_chain() and callers GRAPH_RDLOCK 2023-11-07 19:14:19 +01:00
coroutines.h nbd: Mark nbd_co_do_establish_connection() and callers GRAPH_RDLOCK 2023-05-10 14:16:53 +02:00
create.c block: Call .bdrv_co_create(_opts) unlocked 2023-05-19 19:12:12 +02:00
crypto.c crypto/block: drop qcrypto_block_open() n_threads argument 2024-06-10 11:05:43 +02:00
crypto.h block: Support detached LUKS header creation using qemu-img 2024-02-09 12:50:37 +00:00
curl.c block: remove separate bdrv_file_open callback 2024-06-28 14:44:51 +02:00
dirty-bitmap.c block: Mark bdrv_*_dirty_bitmap() and callers GRAPH_RDLOCK 2023-02-23 19:49:32 +01:00
dmg-bz2.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
dmg-lzfse.c block/dmg: Ignore C99 prototype declaration mismatch from <lzfse.h> 2023-03-30 15:03:36 +02:00
dmg.c block: Protect bs->file with graph_lock 2023-11-08 17:56:18 +01:00
dmg.h block/dmg: Declare a type definition for DMG uncompress function 2023-04-24 13:53:44 -04:00
file-posix.c block: remove separate bdrv_file_open callback 2024-06-28 14:44:51 +02:00
file-win32.c block: remove separate bdrv_file_open callback 2024-06-28 14:44:51 +02:00
filter-compress.c block: Take graph lock for most of .bdrv_open 2023-11-08 17:56:18 +01:00
gluster.c block: remove separate bdrv_file_open callback 2024-06-28 14:44:51 +02:00
graph-lock.c graph-lock: remove AioContext locking 2023-12-21 22:49:27 +01:00
io_uring.c block/io_uring: improve error message when init fails 2024-01-30 16:13:28 -05:00
io.c block: Remove unnecessary NULL check in bdrv_pad_request() 2024-04-02 14:55:32 +02:00
iscsi-opts.c modules: add block module annotations 2021-07-09 18:20:27 +02:00
iscsi.c block: remove separate bdrv_file_open callback 2024-06-28 14:44:51 +02:00
linux-aio.c linux-aio: add IO_CMD_FDSYNC command support 2024-06-10 11:05:43 +02:00
meson.build meson: do not query modules before they are processed 2024-05-25 13:28:02 +02:00
mirror.c blockcommit: Reopen base image as RO after abort 2024-05-28 15:52:15 +03:00
nbd.c block: remove separate bdrv_file_open callback 2024-06-28 14:44:51 +02:00
nfs.c block: remove separate bdrv_file_open callback 2024-06-28 14:44:51 +02:00
null.c block: rename former bdrv_file_open callbacks 2024-06-28 14:44:51 +02:00
nvme.c block: rename former bdrv_file_open callbacks 2024-06-28 14:44:51 +02:00
parallels-ext.c block: Protect bs->file with graph_lock 2023-11-08 17:56:18 +01:00
parallels.c block: Protect bs->file with graph_lock 2023-11-08 17:56:18 +01:00
parallels.h block: Protect bs->file with graph_lock 2023-11-08 17:56:18 +01:00
preallocate.c block: Protect bs->file with graph_lock 2023-11-08 17:56:18 +01:00
progress_meter.c coroutine: Clean up superfluous inclusion of qemu/lockable.h 2023-01-19 10:18:28 +01:00
qapi-sysemu.c block: remove AioContext locking 2023-12-21 22:49:27 +01:00
qapi.c qemu-img: Fix Column Width and Improve Formatting in snapshot list 2024-03-18 13:30:34 +01:00
qcow2-bitmap.c block/qcow2-bitmap: Replace g_memdup() by g_memdup2() 2024-05-08 19:11:34 +02:00
qcow2-cache.c qcow2: Mark qcow2_signal_corruption() and callers GRAPH_RDLOCK 2023-10-12 16:31:33 +02:00
qcow2-cluster.c qcow2: Take locks for accessing bs->file 2023-11-08 17:56:17 +01:00
qcow2-refcount.c qcow2: Mark qcow2_signal_corruption() and callers GRAPH_RDLOCK 2023-10-12 16:31:33 +02:00
qcow2-snapshot.c qcow2: mark various functions as coroutine_fn and GRAPH_RDLOCK 2023-04-25 13:17:28 +02:00
qcow2-threads.c thread-pool: avoid passing the pool parameter every time 2023-04-25 13:17:28 +02:00
qcow2.c qcow2: Don't open data_file with BDRV_O_NO_IO 2024-07-02 18:09:51 +02:00
qcow2.h qcow2: Take locks for accessing bs->file 2023-11-08 17:56:17 +01:00
qcow.c crypto/block: drop qcrypto_block_open() n_threads argument 2024-06-10 11:05:43 +02:00
qed-check.c qed: mark more functions as coroutine_fns and GRAPH_RDLOCK 2023-06-28 09:46:20 +02:00
qed-cluster.c
qed-l2-cache.c osdep: Move memalign-related functions to their own header 2022-03-07 13:16:49 +00:00
qed-table.c block: use bdrv_co_debug_event in coroutine context 2023-06-28 09:46:34 +02:00
qed.c block/qed: Fix missing ERRP_GUARD() for error_prepend() 2024-03-12 11:45:33 +01:00
qed.h block: Protect bs->file with graph_lock 2023-11-08 17:56:18 +01:00
quorum.c graph-lock: remove AioContext locking 2023-12-21 22:49:27 +01:00
raw-format.c block: remove AioContext locking 2023-12-21 22:49:27 +01:00
rbd.c block: remove separate bdrv_file_open callback 2024-06-28 14:44:51 +02:00
replication.c qapi: blockdev-backup: add discard-source parameter 2024-05-28 15:52:15 +03:00
reqlist.c block/reqlist: add reqlist_wait_all() 2022-03-07 09:33:30 +01:00
snapshot-access.c block: Take graph lock for most of .bdrv_open 2023-11-08 17:56:18 +01:00
snapshot.c qapi: Inline and remove QERR_DEVICE_HAS_NO_MEDIUM definition 2024-04-24 09:50:58 +02:00
ssh.c block: rename former bdrv_file_open callbacks 2024-06-28 14:44:51 +02:00
stream.c stream: Allow users to request only format driver names in backing file format 2024-01-26 11:16:58 +01:00
throttle-groups.c block: mark mixed functions that can suspend 2023-09-26 18:09:08 +02:00
throttle.c block: Take graph lock for most of .bdrv_open 2023-11-08 17:56:18 +01:00
trace-events nbd/client: Accept 64-bit block status chunks 2023-10-05 11:02:08 -05:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
vdi.c block/vdi: Fix missing ERRP_GUARD() for error_prepend() 2024-03-12 11:45:34 +01:00
vhdx-endian.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
vhdx-log.c vhdx: Take locks for accessing bs->file 2023-11-08 17:56:18 +01:00
vhdx.c vhdx: Take locks for accessing bs->file 2023-11-08 17:56:18 +01:00
vhdx.h vhdx: Take locks for accessing bs->file 2023-11-08 17:56:18 +01:00
vmdk.c block/vmdk: Improve error messages on extent write error 2024-05-27 12:42:29 +02:00
vpc.c block: Take graph lock for most of .bdrv_open 2023-11-08 17:56:18 +01:00
vvfat.c block: remove separate bdrv_file_open callback 2024-06-28 14:44:51 +02:00
win32-aio.c aio: remove aio_disable_external() API 2023-05-30 17:37:26 +02:00
write-threshold.c block: remove AioContext locking 2023-12-21 22:49:27 +01:00