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qcow2: Fix segfault on zero-length write 

One of the recent refactoring patches (commit f50f88b9) didn't take care
to initialise l2meta properly, so with zero-length writes, which don't
even enter the write loop, qemu just segfaulted.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
master
Kevin Wolf 2013-01-14 17:31:31 +01:00 committed by Stefan Hajnoczi
parent cf7c3f0cb5
commit 8d2497c355
1 changed files with 1 additions and 1 deletions
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2
block/qcow2.c
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@ -759,7 +759,7 @@ static coroutine_fn int qcow2_co_writev(BlockDriverState *bs,
QEMUIOVector hd_qiov;
uint64_t bytes_done = 0;
uint8_t *cluster_data = NULL;
QCowL2Meta *l2meta;
QCowL2Meta *l2meta = NULL;
trace_qcow2_writev_start_req(qemu_coroutine_self(), sector_num,
remaining_sectors);