From d9738fd2463f71530d8d92fbb52ebdd1d78074fc Mon Sep 17 00:00:00 2001 From: Peter Lieven Date: Sat, 22 Feb 2014 13:17:24 +0100 Subject: [PATCH] block/iscsi: fix segfault if writesame fails commit fa6252b0 introduced a segfault because it tries to read iTask.task->sense after iTask.task has been freed. Signed-off-by: Peter Lieven Signed-off-by: Paolo Bonzini --- block/iscsi.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/block/iscsi.c b/block/iscsi.c index 4360cf1f73..0a15f53f8c 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -836,6 +836,15 @@ retry: qemu_coroutine_yield(); } + if (iTask.status == SCSI_STATUS_CHECK_CONDITION && + iTask.task->sense.key == SCSI_SENSE_ILLEGAL_REQUEST && + iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE) { + /* WRITE SAME is not supported by the target */ + iscsilun->has_write_same = false; + scsi_free_scsi_task(iTask.task); + return -ENOTSUP; + } + if (iTask.task != NULL) { scsi_free_scsi_task(iTask.task); iTask.task = NULL; @@ -847,14 +856,6 @@ retry: } if (iTask.status != SCSI_STATUS_GOOD) { - if (iTask.status == SCSI_STATUS_CHECK_CONDITION && - iTask.task->sense.key == SCSI_SENSE_ILLEGAL_REQUEST && - iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE) { - /* WRITE SAME is not supported by the target */ - iscsilun->has_write_same = false; - return -ENOTSUP; - } - return -EIO; } -- GitLab