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>
---
v1->v2:
- move bs->drv check to top of function to match other bdrv_
functions
- fill out reqs response with error code before
returning -1.
block.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/block.c b/block.c
index f7d91a2..1544d81 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;
}
--
1.7.1
--
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
ry...@us.ibm.com
