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block/block-copy: fix use-after-free of task pointer

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Obviously, we should g_free the task after trace point and offset
update.

Reported-by: Coverity (CID 1428756)
Fixes: 4ce5dd3e9b
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20200507183800.22626-1-vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2020-05-07 21:38:00 +03:00 committed by Max Reitz
parent dd488fc1c0
commit fc9aefc8c0
1 changed files with 1 additions and 1 deletions
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2
block/block-copy.c
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@ -591,13 +591,13 @@ static int coroutine_fn block_copy_dirty_clusters(BlockCopyState *s,
}
if (s->skip_unallocated && !(ret & BDRV_BLOCK_ALLOCATED)) {
block_copy_task_end(task, 0);
g_free(task);
progress_set_remaining(s->progress,
bdrv_get_dirty_count(s->copy_bitmap) +
s->in_flight_bytes);
trace_block_copy_skip_range(s, task->offset, task->bytes);
offset = task_end(task);
bytes = end - offset;
g_free(task);
continue;
}
task->zeroes = ret & BDRV_BLOCK_ZERO;