From: Ryan Harper <ry...@us.ibm.com>
If the block device has been closed, we no longer have a medium to submit
IO against, check for this before submitting io. This prevents a segfault
further in the code where we dereference elements of the block driver.
Signed-off-by: Ryan Harper <ry...@us.ibm.com>
Reviewed-by: Stefan Hajnoczi <stefa...@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
block.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/block.c b/block.c
index 0559d83..c8e2f97 100644
--- a/block.c
+++ b/block.c
@@ -2398,6 +2398,14 @@ int bdrv_aio_multiwrite(BlockDriverState *bs,
BlockRequest *reqs, int num_reqs)
MultiwriteCB *mcb;
int i;
+ /* don't submit writes if we don't have a medium */
+ if (bs->drv == NULL) {
+ for (i = 0; i < num_reqs; i++) {
+ reqs[i].error = -ENOMEDIUM;
+ }
+ return -1;
+ }
+
if (num_reqs == 0) {
return 0;
}
--
1.7.2.3
