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0647d47cc1
qemu/block
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Stefan Hajnoczi 0647d47cc1 qcow2: avoid memcpy(dst, NULL, len) 
Section "7.1.4 Use of library functions" in the C99 standard says:

  If an argument to a function has an invalid value (such as [...]
  a null pointer [...]) [...] the behavior is undefined.

Additionally the "searching and sorting" functions are specified as
requiring valid pointer values as described in 7.1.4.

This patch fixes the following sanitizer errors:

  block/qcow2.c:1807:41: runtime error: null pointer passed as argument 2, which is declared to never be null
  block/qcow2-cluster.c:86:26: runtime error: null pointer passed as argument 2, which is declared to never be null

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 1473758138-19260-1-git-send-email-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2016-09-13 11:00:55 +01:00
..
accounting.c block: Clean up includes 2016-01-20 13:36:23 +01:00
archipelago.c coccinelle: Remove unnecessary variables for function return value 2016-06-20 16:38:13 +02:00
backup.c drive-backup: added support for data compression 2016-09-05 19:06:48 +02:00
blkdebug.c block/blkdebug: Store config filename 2016-08-15 15:52:28 +02:00
blkreplay.c blkreplay: Switch .bdrv_co_discard() to byte-based 2016-07-20 14:11:55 +01:00
blkverify.c block: Convert bdrv_aio_writev() to BdrvChild 2016-07-05 16:46:26 +02:00
block-backend.c block: remove BlockDriver.bdrv_write_compressed 2016-09-05 19:06:48 +02:00
bochs.c block: Convert bdrv_co_preadv/pwritev to BdrvChild 2016-07-05 16:46:27 +02:00
cloop.c block: Convert bdrv_pread(v) to BdrvChild 2016-07-05 16:46:27 +02:00
commit.c Improve block job rate limiting for small bandwidth values 2016-07-13 13:41:38 +02:00
crypto.c block: export LUKS specific data to qemu-img info 2016-07-26 17:46:37 +02:00
curl.c curl: Cast fd to int for DPRINTF 2016-08-17 19:57:54 +08:00
dirty-bitmap.c dirty-bitmap: operate with int64_t amount 2016-07-19 16:54:46 -04:00
dmg.c block: Convert bdrv_pread(v) to BdrvChild 2016-07-05 16:46:27 +02:00
gluster.c Pull request 2016-07-21 11:00:36 +01:00
io.c block/io: turn on dirty_bitmaps for the compressed writes 2016-09-05 19:06:48 +02:00
iscsi.c iscsi: Switch .bdrv_co_discard() to byte-based 2016-07-20 14:24:25 +01:00
linux-aio.c linux-aio: Handle io_submit() failure gracefully 2016-08-11 09:42:35 +01:00
Makefile.objs block: Move bdrv_commit() to block/commit.c 2016-07-05 16:46:27 +02:00
mirror.c mirror: finish earlier on error 2016-08-08 13:05:43 +02:00
nbd-client.c nbd: Convert to byte-based interface 2016-07-20 14:24:25 +01:00
nbd-client.h nbd: Limit nbdflags to 16 bits 2016-08-03 18:44:56 +02:00
nbd.c block/nbd: Store runtime option values 2016-08-15 15:52:29 +02:00
nfs.c coroutine: move entry argument to qemu_coroutine_create 2016-07-13 13:26:02 +02:00
null.c block/null: Implement bdrv_refresh_filename() 2016-06-16 15:20:37 +02:00
parallels.c block/parallels: check new image size 2016-08-05 09:59:06 +01:00
qapi.c qapi: Add new visit_complete() function 2016-07-06 10:52:04 +02:00
qcow2-cache.c block: Convert bdrv_pwrite(v/_sync) to BdrvChild 2016-07-05 16:46:27 +02:00
qcow2-cluster.c qcow2: avoid memcpy(dst, NULL, len) 2016-09-13 11:00:55 +01:00
qcow2-refcount.c block: Convert bdrv_discard() to byte-based 2016-07-20 14:11:55 +01:00
qcow2-snapshot.c block: Convert bdrv_pwrite(v/_sync) to BdrvChild 2016-07-05 16:46:27 +02:00
qcow2.c qcow2: avoid memcpy(dst, NULL, len) 2016-09-13 11:00:55 +01:00
qcow2.h qcow2: Implement .bdrv_co_pwritev() 2016-06-16 15:19:55 +02:00
qcow.c qcow: cleanup qcow_co_pwritev_compressed to avoid the recursion 2016-09-05 19:06:48 +02:00
qed-check.c qed: Use DIV_ROUND_UP 2016-06-07 18:19:24 +03:00
qed-cluster.c block: Clean up includes 2016-01-20 13:36:23 +01:00
qed-gencb.c block: Clean up includes 2016-01-20 13:36:23 +01:00
qed-l2-cache.c block: Clean up includes 2016-01-20 13:36:23 +01:00
qed-table.c block: Convert bdrv_aio_writev() to BdrvChild 2016-07-05 16:46:26 +02:00
qed.c coroutine: move entry argument to qemu_coroutine_create 2016-07-13 13:26:02 +02:00
qed.h util: move declarations out of qemu-common.h 2016-03-22 22:20:17 +01:00
quorum.c block: Convert bdrv_aio_writev() to BdrvChild 2016-07-05 16:46:26 +02:00
raw_bsd.c raw_bsd: Convert to byte-based interface 2016-07-20 14:24:25 +01:00
raw-posix.c block: Convert .bdrv_aio_discard() to byte-based 2016-07-20 14:11:55 +01:00
raw-win32.c raw-posix: Switch paio_submit() to byte-based 2016-07-20 14:11:55 +01:00
rbd.c block: Convert .bdrv_aio_discard() to byte-based 2016-07-20 14:11:55 +01:00
sheepdog.c sheepdog: Switch .bdrv_co_discard() to byte-based 2016-07-20 14:24:25 +01:00
snapshot.c error: Remove NULL checks on error_propagate() calls 2016-06-20 16:38:13 +02:00
ssh.c block/ssh: Use QemuOpts for runtime options 2016-08-15 15:52:28 +02:00
stream.c Improve block job rate limiting for small bandwidth values 2016-07-13 13:41:38 +02:00
throttle-groups.c block: Move I/O throttling configuration functions to BlockBackend 2016-05-19 16:45:30 +02:00
trace-events trace-events: fix first line comment in trace-events 2016-08-12 10:36:01 +01:00
vdi.c block: Convert bdrv_co_preadv/pwritev to BdrvChild 2016-07-05 16:46:27 +02:00
vhdx-endian.c qemu-common: stop including qemu/bswap.h from qemu-common.h 2016-05-19 16:42:28 +02:00
vhdx-log.c block: Convert bdrv_pwrite(v/_sync) to BdrvChild 2016-07-05 16:46:27 +02:00
vhdx.c block: Convert bdrv_pwrite(v/_sync) to BdrvChild 2016-07-05 16:46:27 +02:00
vhdx.h block: vhdx - update PAYLOAD_BLOCK_UNMAPPED value to match 1.00 spec 2014-12-12 15:42:22 +00:00
vmdk.c vmdk: add vmdk_co_pwritev_compressed 2016-09-05 19:06:48 +02:00
vpc.c block: Convert bdrv_co_preadv/pwritev to BdrvChild 2016-07-05 16:46:27 +02:00
vvfat.c vvfat: Fix qcow write target driver specification 2016-07-13 13:41:39 +02:00
win32-aio.c linux-aio: share one LinuxAioState within an AioContext 2016-07-18 15:09:31 +01:00
write-threshold.c block: Clean up includes 2016-01-20 13:36:23 +01:00