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Block layer patches:

Browse Source 
- qcow2: Fix potential corruption for preallocated resize with external data file
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Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches:

- qcow2: Fix potential corruption for preallocated resize with external data file

# gpg: Signature made Tue 16 Apr 2019 15:23:35 BST
# gpg:                using RSA key 7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream:
  qcow2: Fix preallocation bdrv_pwrite to wrong file

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2019-04-16 15:33:38 +01:00
commit dbfc49b69a
1 changed files with 2 additions and 1 deletions
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3
block/qcow2.c
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@ -2723,6 +2723,7 @@ static int qcow2_set_up_encryption(BlockDriverState *bs,
static int coroutine_fn preallocate_co(BlockDriverState *bs, uint64_t offset,
uint64_t new_length)
{
BDRVQcow2State *s = bs->opaque;
uint64_t bytes;
uint64_t host_offset = 0;
unsigned int cur_bytes;
@ -2771,7 +2772,7 @@ static int coroutine_fn preallocate_co(BlockDriverState *bs, uint64_t offset,
*/
if (host_offset != 0) {
uint8_t data = 0;
ret = bdrv_pwrite(bs->file, (host_offset + cur_bytes) - 1,
ret = bdrv_pwrite(s->data_file, (host_offset + cur_bytes) - 1,
&data, 1);
if (ret < 0) {
return ret;