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[PATCH] block/iscsi: fix double-free on BUSY or similar statuses
From: |
Paolo Bonzini |
Subject: |
[PATCH] block/iscsi: fix double-free on BUSY or similar statuses |
Date: |
Tue, 10 Jan 2023 17:36:41 +0100 |
Commit 8c460269aa77 ("iscsi: base all handling of check condition on
scsi_sense_to_errno", 2019-07-15) removed a "goto out" so that the
same coroutine is re-entered twice; once from iscsi_co_generic_cb,
once from the timer callback iscsi_retry_timer_expired. This can
cause a crash.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1378
Reported-by: Grzegorz Zdanowski <https://gitlab.com/kiler129>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
block/iscsi.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/block/iscsi.c b/block/iscsi.c
index a316d46d9625..1bba42a71b77 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -268,6 +268,7 @@ iscsi_co_generic_cb(struct iscsi_context *iscsi, int status,
timer_mod(&iTask->retry_timer,
qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + retry_time);
iTask->do_retry = 1;
+ return;
} else if (status == SCSI_STATUS_CHECK_CONDITION) {
int error = iscsi_translate_sense(&task->sense);
if (error == EAGAIN) {
--
2.38.1
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