From 51cb710930b200264555e47590c8a50b82588ecb Mon Sep 17 00:00:00 2001 From: Fam Zheng Date: Fri, 4 Apr 2014 05:55:59 +0200 Subject: [PATCH 04/12] block/iscsi: fix segfault if writesame fails RH-Author: Fam Zheng Message-id: <1396590962-25815-5-git-send-email-famz@redhat.com> Patchwork-id: 58341 O-Subject: [RHEL-7 0day qemu-kvm PATCH 4/7] block/iscsi: fix segfault if writesame fails Bugzilla: 1090978 RH-Acked-by: Paolo Bonzini RH-Acked-by: Markus Armbruster RH-Acked-by: Kevin Wolf RH-Acked-by: Jeffrey Cody From: Peter Lieven 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 (cherry picked from commit d9738fd2463f71530d8d92fbb52ebdd1d78074fc) Signed-off-by: Fam Zheng --- block/iscsi.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) Signed-off-by: Miroslav Rezanina --- block/iscsi.c | 17 +++++++++-------- 1 files changed, 9 insertions(+), 8 deletions(-) diff --git a/block/iscsi.c b/block/iscsi.c index d3c8802..4a535e3 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -1010,6 +1010,15 @@ 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; @@ -1020,14 +1029,6 @@ 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; } -- 1.7.1