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iscsi: Don't access non-existent scsi_lba_status_descriptor

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In iscsi_co_block_status(), we may have received num_descriptors == 0
from the iscsi server. Therefore, we can't unconditionally access
lbas->descriptors[0]. Add the missing check.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Felipe Franciosi <felipe@nutanix.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Peter Lieven <pl@kamp.de>
This commit is contained in:
Kevin Wolf 2020-01-23 18:00:54 +01:00
parent 693fd2acdf
commit 5fbf1d56c2
1 changed files with 1 additions and 1 deletions
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block/iscsi.c
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@ -753,7 +753,7 @@ retry:
}
lbas = scsi_datain_unmarshall(iTask.task);
if (lbas == NULL) {
if (lbas == NULL || lbas->num_descriptors == 0) {
ret = -EIO;
goto out_unlock;
}